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Sökning: L773:1364 548X OR L773:1359 7345

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1.
  • Abdel-Magied, Ahmed, et al. (författare)
  • Diastereomeric control of enantioselectivity: evidence for metal cluster catalysis.
  • 2014
  • Ingår i: Chemical Communications. - : Royal Society of Chemistry (RSC). - 1364-548X. ; 50:57, s. 7705-7708
  • Tidskriftsartikel (refereegranskat)abstract
    • Enantioselective hydrogenation of tiglic acid effected by diastereomers of the general formula [(μ-H)2Ru3(μ3-S)(CO)7(μ-P-P*)] (P-P* = chiral Walphos diphosphine ligand) strongly supports catalysis by intact Ru3 clusters. A catalytic mechanism involving Ru3 clusters has been established by DFT calculations.
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2.
  • Abu-Youssef, Morsy A.M., et al. (författare)
  • A unique example of a high symmetry three- and four-connected hydrogen bonded 3D-network
  • 2006
  • Ingår i: Chemical Communications. - : Royal Society of Chemistry (RSC). - 1364-548X .- 1359-7345. ; 2006:10, s. 1082-1084
  • Tidskriftsartikel (refereegranskat)abstract
    • We present a three- and four-connected 3D-net based on 4-aminopyridine coordinated to Ag(I) and hydrogen bonded to nitrate with the unusual, high symmetry, topology (83)(86)2-tfa.
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3.
  • Ahlquist, Mårten, et al. (författare)
  • C-H activation in strongly acidic media. The co-catalytic effect of the reaction medium
  • 2009
  • Ingår i: Chemical Communications. - : Royal Society of Chemistry (RSC). - 1359-7345 .- 1364-548X. ; :17, s. 2373-2375
  • Tidskriftsartikel (refereegranskat)abstract
    • Quantum mechanical (QM) results are used to establish the role of sulfuric acid solvent in facilitating the reaction between Pt(II)(bpym)Cl(2) (bpym = 2,2'-bipyrimidinyl) and methane; coordination of methane to the platinum catalyst is found to be catalyzed by the acidic medium.
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4.
  • Ahlquist, Mårten, et al. (författare)
  • Palladium(0) alkyne complexes as active species : a DFT investigation
  • 2005
  • Ingår i: Chemical Communications. - : Royal Society of Chemistry (RSC). - 1359-7345 .- 1364-548X. ; :33, s. 4196-4198
  • Tidskriftsartikel (refereegranskat)abstract
    • Alkynes have been found to be excellent ligands for Pd(0); the stability of a range of alkyne-Pd(0) complexes, and their reactivity in oxidative addition, have been investigated by DFT methods.
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5.
  • Ahlsten, Nanna, 1982-, et al. (författare)
  • Ir-catalysed formation of C-F bonds. From allylic alcohols to α-fluoroketones
  • 2011
  • Ingår i: Chemical Communications. - : Royal Society of Chemistry (RSC). - 1359-7345 .- 1364-548X. ; 47:29, s. 8331-8333
  • Tidskriftsartikel (refereegranskat)abstract
    • A novel iridium-catalysed tandem isomerisation/C-F bond formation from allylic alcohols and Selectfluor® to prepare α-fluorinated ketones as single constitutional isomers is reported.
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6.
  • Ambre, Ram B., et al. (författare)
  • Molecular engineering for efficient and selective iron porphyrin catalysts for electrochemical reduction of CO2 to CO
  • 2016
  • Ingår i: CHEMICAL COMMUNICATIONS. - : Royal Society of Chemistry. - 1359-7345 .- 1364-548X. ; 52:100, s. 14478-14481
  • Tidskriftsartikel (refereegranskat)abstract
    • Iron porphyrins Fe-pE, Fe-mE, and Fe-oE were synthesized and their electrochemical behavior for CO2 reduction to CO has been investigated. The controlled potential electrolysis of Fe-mE gave exclusive 65% Faradaic efficiency (FE) whereas Fe-oE achieved quasi-quantitative 98% FE (2% H-2) for CO production.
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7.
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8.
  • Amombo Noa, Francoise M., et al. (författare)
  • A Hexagon Based Mn(II) Rod Metal-Organic Framework – Structure, SF6 Gas Sorption, Magnetism and Electrochemistry
  • 2023
  • Ingår i: Chemical Communications. - : Royal Society of Chemistry. - 1359-7345 .- 1364-548X.
  • Tidskriftsartikel (refereegranskat)abstract
    • A manganese(II) metal-organic framework based on the hexatopic hexakis(4-carboxyphenyl)benzene, cpb6-: [Mn3(cpb)(dmf)3], was solvothermally prepared showing a Langmuir area of 438 m2/g, rapid uptake of sulfur hexafluoride (SF6) as well as electrochemical and magnetic properties, while single crystal diffraction reveals an unusual rod-MOF topology.
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9.
  • Amombo Noa, Francoise Mystere, 1988, et al. (författare)
  • A hexagon based Mn(ii) rod metal-organic framework - structure, SF 6 gas sorption, magnetism and electrochemistry
  • 2023
  • Ingår i: Chemical Communications. - : Royal Society of Chemistry (RSC). - 1364-548X .- 1359-7345. ; 59:15, s. 2106-2109
  • Tidskriftsartikel (refereegranskat)abstract
    • A manganese(ii) metal-organic framework based on the hexatopic hexakis(4-carboxyphenyl)benzene, cpb6−: [Mn3(cpb)(dmf)3], was solvothermally prepared showing a Langmuir area of 438 m2 g−1, rapid uptake of sulfur hexafluoride (SF6) as well as electrochemical and magnetic properties, while single crystal diffraction reveals an unusual rod-MOF topology.
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10.
  • Andersson, Hans, et al. (författare)
  • Efficient, mild and completely regioselective synthesis of substituted pyridines
  • 2010
  • Ingår i: Chemical Communications. - : RSC Publishing. - 1359-7345 .- 1364-548X. ; 46:19, s. 3384-3386
  • Tidskriftsartikel (refereegranskat)abstract
    • Addition of Grignard reagents to pyridine N-oxides in THF at low temperature (-78 to -20 °C) and treatment with TFAA provides an efficient general procedure for synthesis of substituted pyridines. The method is compatible with a range of functional groups such as esters, halogens and nitriles.
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11.
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12.
  • Ankner, Tobias, 1976, et al. (författare)
  • Selective cleavage of 3,5-bis-(trifluoromethyl)benzylcarbamate by SmI2-Et3N-H2O
  • 2013
  • Ingår i: Chemical Communications. - : Royal Society of Chemistry (RSC). - 1359-7345 .- 1364-548X. ; 49:61, s. 6867-6869
  • Tidskriftsartikel (refereegranskat)abstract
    • A novel electron poor protection group for amines has been developed. It undergoes rapid cleavage by SmI2-Et3N-H2O and its orthogonality towards the regular benzyl carbamate group (CBz) under reductive or transfer hydrogenolytic conditions is reported.
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13.
  • Antila, Liisa J., et al. (författare)
  • Hunting for the elusive shallow traps in TiO2 anatase
  • 2015
  • Ingår i: Chemical Communications. - : Royal Society of Chemistry (RSC). - 1359-7345 .- 1364-548X. ; 51:54, s. 10914-10916
  • Tidskriftsartikel (refereegranskat)abstract
    • Understanding electron mobility on TiO2 is crucial because of its applications in photocatalysis and solar cells. This work shows that shallow traps believed to be involved in electron migration in TiO2 conduction band are formed upon band gap excitation, i.e., are not pre-existing states. The shallow traps in TiO2 results from large polarons and are not restricted to surface.
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14.
  • Antoni, Per, et al. (författare)
  • A chemoselective approach for the accelerated synthesis of well-defined dendritic architectures
  • 2007
  • Ingår i: Chemical Communications. - : Royal Society of Chemistry (RSC). - 1359-7345 .- 1364-548X. ; :22, s. 2249-2251
  • Tidskriftsartikel (refereegranskat)abstract
    • A chemoselective and layered growth approach has been developed for the synthesis of dendrimers, combining Click chemistry with traditional esterification/etherification reactions, without the need for activation steps and with excellent overall yields.
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15.
  • Arkhypchuk, Anna I., et al. (författare)
  • Triarylalkenes from the site-selective reductive cross-coupling of benzophenones and aldehydes
  • 2019
  • Ingår i: Chemical Communications. - : Royal Society of Chemistry (RSC). - 1359-7345 .- 1364-548X. ; 55:43, s. 6030-6033
  • Tidskriftsartikel (refereegranskat)abstract
    • PhP(Li)TMS converts benzophenones to phosphaalkenes which upon activation under oxidizing, basic conditions react with aromatic aldehydes under the formation of triarylalkenes. The one-pot reaction omits transition metals, proceeds at room temperature and precludes the formation of any homo-coupling products. Systematic substrate variations reveal reactivity patterns that are useful for the identification of ketone/aldehyde combinations that can be coupled in yields up to 80%.
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16.
  • Arrigan, Damien, et al. (författare)
  • Selective voltammetric detection of dopamine in the presence ofascorbate
  • 2004
  • Ingår i: Chemical Communications. - : Royal Society of Chemistry. - 1359-7345 .- 1364-548X. ; :6, s. 732-733
  • Tidskriftsartikel (refereegranskat)abstract
    • The selective detection of dopamine in the presence of ascorbateis demonstrated based on the voltammetry of dopamine transferacross the interface between two immiscible electrolyte solutions(ITIES) facilitated by an organic-phase ionophore; ascorbatetransfer does not occur, leading to highly selectivedetection of dopamine in the presence of excess ascorbate.
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17.
  • Augusto Berrocal, Jose, et al. (författare)
  • Consequences of conformational flexibility in hydrogen-bond-driven self-assembly processes
  • 2016
  • Ingår i: Chemical Communications. - : ROYAL SOC CHEMISTRY. - 1359-7345 .- 1364-548X. ; 52:72, s. 10870-10873
  • Tidskriftsartikel (refereegranskat)abstract
    • We report the synthesis and self-assembly of chiral, conformationally flexible C-3-symmetrical trisamides. A strong Cotton effect is observed for the supramolecular polymers in linear alkanes but not in cyclic alkanes. MD simulations suggest 2:1 conformations of the amides within the aggregates in both types of solvents, but a chiral bias in only linear alkanes.
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18.
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19.
  • Axelsson, Anton, 1991, et al. (författare)
  • Asymmetric aerobic oxidative NHC-catalysed synthesis of dihydropyranones utilising a system of electron transfer mediators
  • 2016
  • Ingår i: Chemical Communications. - 1364-548X .- 1359-7345. ; 52:77, s. 11571-11574
  • Tidskriftsartikel (refereegranskat)abstract
    • In the context of green chemistry, the replacement of high molecular weight stoichiometric oxidants with O2 is most desirable but difficult. Here, we report the asymmetric aerobic oxidative synthesis of dihydropyranones. The oxidation is aided by a system of electron transfer mediators and is selective toward the homoenolate. The dihydropyranones can be isolated in high to excellent yields, with high ee (up to 95%).
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20.
  • Azharuddin, Mohammad, 1986-, et al. (författare)
  • A repertoire of biomedical applications of noble metal nanoparticles
  • 2019
  • Ingår i: Chemical Communications. - : Royal Society of Chemistry. - 1359-7345 .- 1364-548X. ; 55:49, s. 6964-6996
  • Forskningsöversikt (refereegranskat)abstract
    • Noble metals comprise any of several metallic chemical elements that are outstandingly resistant to corrosion and oxidation, even at elevated temperatures. This group is not strictly defined, but the tentative list includes ruthenium, rhodium, palladium, silver, osmium, iridium, platinum and gold, in order of atomic number. The emerging properties of noble metal nanoparticles are attracting huge interest from the translational scientific community and have led to an unprecedented expansion of research and exploration of applications in biotechnology and biomedicine. Noble metal nanomaterials can be synthesised both by top-down and bottom up approaches, as well as via organism-assisted routes, and subsequently modified appropriately for the field of use. Nanoscale analogues of gold, silver, platinum, and palladium in particular, have gained primary importance owing to their excellent intrinsic properties and diversity of applications; they offer unique functional attributes, which are quite unlike the bulk material. Modulation of noble metal nanoparticles in terms of size, shape and surface functionalisation has endowed them with unusual capabilities and manipulation at the chemical level, which can lead to changes in their electrical, chemical, optical, spectral and other intrinsic properties. Such flexibility in multi-functionalisation delivers Ockhams razor to applied biomedical science. In this feature article, we highlight recent advances in the adaptation of noble metal nanomaterials and their biomedical applications in therapeutics, diagnostics and sensing.
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21.
  • Bai, Lichen, et al. (författare)
  • Visible-light-driven selective oxidation of benzyl alcohol and thioanisole by molecular ruthenium catalyst modified hematite
  • 2016
  • Ingår i: Chemical Communications. - : Royal Society of Chemistry. - 1359-7345 .- 1364-548X. ; 52:62, s. 9711-9714
  • Tidskriftsartikel (refereegranskat)abstract
    • Molecular ruthenium catalysts were found to selectively catalyze the oxidation of thioanisole to sulfoxide with a yield up to 100% in the presence of visible light and sacrificial reagents when they were anchored onto hematite powder. The composite photocatalysts also showed about 5 times higher efficiencies in benzyl alcohol oxidation than the system composed of dispersed molecular catalysts and hematite particles in aqueous solution. A photoelectrochemical cell based on a molecular catalyst modified hematite photoanode was further fabricated, which exhibited high activity towards the oxidation of organic substrates.
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22.
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23.
  • Bao, Zijia, et al. (författare)
  • A helical polypyrrole nanotube interwoven zeolitic imidazolate framework and its derivative as an oxygen electrocatalyst
  • 2022
  • Ingår i: Chemical Communications. - : Royal Society of Chemistry (RSC). - 1359-7345 .- 1364-548X. ; 58:80, s. 11288-11291
  • Tidskriftsartikel (refereegranskat)abstract
    • A helical polypyrrole nanotube interwoven zeolitic imidazolate framework (ZIF) has been prepared for the first time. After pyrolysis, the helical carbon could act as highly active sites, while the 3D-connected nanoarchitecture contributed to fast charge transfer. The derived carbon material exhibits high activity for the ORR and good performance for a Zn–air battery.
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24.
  • Basagni, Andrea, et al. (författare)
  • On-surface photo-dissociation of C-Br bonds: towards room temperature Ullmann coupling
  • 2015
  • Ingår i: Chemical Communications. - : Royal Society of Chemistry (RSC). - 1364-548X .- 1359-7345. ; 51:63, s. 12593-12596
  • Tidskriftsartikel (refereegranskat)abstract
    • The surface-assisted synthesis of gold-organometallic hybrids on the Au(111) surface both by thermo-and light-initiated dehalogenation of bromo-substituted tetracene is reported. Combined X-ray photoemission (XPS) and scanning tunneling microscopy (STM) data reveal a significant increase of the surface order when mild reaction conditions are combined with 405 nm light irradiation.
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25.
  • Bauters, Stephen, et al. (författare)
  • Signatures of technetium oxidation states : a new approach
  • 2020
  • Ingår i: Chemical Communications. - : ROYAL SOC CHEMISTRY. - 1359-7345 .- 1364-548X. ; 56:67, s. 9608-9611
  • Tidskriftsartikel (refereegranskat)abstract
    • A general strategy for the determination of Tc oxidation state by new approach involving X-ray absorption near edge spectroscopy (XANES) at the Tc L-3 edge is shown. A comprehensive series of Tc-99 compounds, ranging from oxidation states I to VII, was measured and subsequently simulated within the framework of crystal-field multiplet theory. The observable trends in the absorption edge energy shift in combination with the spectral shape allow for a deeper understanding of complicated Tc coordination chemistry. This approach can be extended to numerous studies of Tc systems as this method is one of the most sensitive methods for accurate Tc oxidation state and ligand characterization.
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26.
  • Berghaus, Melanie, et al. (författare)
  • Productive encounter : molecularly imprinted nanoparticles prepared using magnetic templates
  • 2014
  • Ingår i: Chemical Communications. - : Royal Society of Chemistry. - 1359-7345 .- 1364-548X. ; 50:64, s. 8993-8996
  • Tidskriftsartikel (refereegranskat)abstract
    • Synthesis of core-shell nanoparticles by surface initiated reversible addition fragmentation chain transfer polymerization in presence of a chiral template conjugated to magnetic nanoparticles is reported. The approach leads to imprinted nanoparticles featuring enantioselectivity and enhanced affinity compared to nanoparticles prepared using free template.
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27.
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28.
  • Bermejo Gómez, Antonio, et al. (författare)
  • Efficient DBU accelerated synthesis of F-18-labelled trifluoroacetamides
  • 2016
  • Ingår i: Chemical Communications. - : Royal Society of Chemistry (RSC). - 1359-7345 .- 1364-548X. ; 52:97, s. 13963-13966
  • Tidskriftsartikel (refereegranskat)abstract
    • Nucleophilic F-18-fluorination of bromodifluoromethyl derivatives was performed using [F-18] Bu4NF in the presence of DBU(1,8-diazabicyclo[5.4.0]undec-7-ene). This novel procedure provided a diverse set of [F-18] trifluoroacetamides in good to excellent radiochemical conversions. A mechanism where DBU acts as organomediator in this transformation is proposed.
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29.
  • Bermejo-Velasco, Daniel, et al. (författare)
  • Thiazolidine chemistry revisited : a fast, efficient and stable click-type reaction at physiological pH
  • 2018
  • Ingår i: Chemical Communications. - : Royal Society of Chemistry (RSC). - 1359-7345 .- 1364-548X. ; 54:88, s. 12507-12510
  • Tidskriftsartikel (refereegranskat)abstract
    • We describe the fast reaction kinetics between 1,2-aminothiols and aldehydes. Under physiological conditions such a click-type reaction afforded a thiazolidine product that remains stable and did not require any catalyst. This type of bioorthogonal reaction offers enormous potential for the coupling of biomolecules in an efficient and biocompatible manner.
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30.
  • Beyler, Maryline, et al. (författare)
  • Pentacoordinate iron complexes as functional models of the distal iron in [FeFe] hydrogenases
  • 2011
  • Ingår i: Chemical Communications. - : Royal Society of Chemistry (RSC). - 1359-7345 .- 1364-548X. ; 47:42, s. 11662-11664
  • Tidskriftsartikel (refereegranskat)abstract
    • Mononuclear pentacoordinate iron complexes with a free coordination site were prepared as mimics of the distal Fe (Fe(d)) in the active site of [FeFe] hydrogenases. The complexes catalyze the electrochemical reduction of protons at mild overpotential.
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31.
  • Bhowmick, Sourav, et al. (författare)
  • Ambient temperature liquid salt electrolytes
  • 2023
  • Ingår i: Chemical Communications. - : Royal Society of Chemistry (RSC). - 1364-548X .- 1359-7345. ; 59:18, s. 2620-2623
  • Tidskriftsartikel (refereegranskat)abstract
    • Alkali metal salts usually have high melting points due to strong electrostatic interactions and solvents are needed to create ambient temperature liquid electrolytes. Here, we report on six phosphate-anion-based alkali metal salts, Li/Na/K, all of which are liquids at room temperature, with glass transition temperatures ranging from −61 to −29 °C, and are thermally stable up to at least 225 °C. While the focus herein is on various physico-chemical properties, these salts also exhibit high anodic stabilities, up to 6 V vs. M/M+ (M = Li/Na/K), and deliver some battery performance - at elevated temperatures as there are severe viscosity limitations at room-temperature. While the battery performance arguably is sub-par, solvent-free electrolytes based on alkali metal salts such as these should pave the way for conceptually different Li/Na/K-batteries, either by refined anion design or by using several salts to create eutectic mixtures.
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32.
  • Bhunia, Asamanjoy, et al. (författare)
  • Formal water oxidation turnover frequencies from MIL-101(Cr) anchored Ru(bda) depend on oxidant concentration
  • 2018
  • Ingår i: Chemical Communications. - : ROYAL SOC CHEMISTRY. - 1359-7345 .- 1364-548X. ; 54, s. 7770-7773
  • Tidskriftsartikel (refereegranskat)abstract
    • The molecular water oxidation catalyst [Ru(bda)(L)(2)] has been incorporated into pyridine-decorated MIL-101(Cr) metal-organic frameworks. The resulting MIL-101@Ru materials exhibit turnover frequencies (TOFs) up to ten times higher compared to the homogenous reference. An unusual dependence of the formal TOFs on oxidant concentration is observed that ultimately arises from differing amounts of catalysts in the MOF crystals being active.
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33.
  • Bielawski, Marcin, et al. (författare)
  • High-Yielding One-Pot Synthesis of Diaryliodonium Triflates from Arenes and Iodine or Aryl Iodides
  • 2007
  • Ingår i: Chemical Communications. - : Royal Society of Chemistry (RSC). - 1359-7345 .- 1364-548X. ; :24, s. 2521-2523
  • Tidskriftsartikel (refereegranskat)abstract
    • Unsymmetric and symmetric diaryliodonium triflates are synthesized from both electron-deficient and electron-rich substrates in a fast, high yielding, and operationally simple protocol employing arenes and aryl iodides or iodine.
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34.
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35.
  • Boniolo, Manuel, et al. (författare)
  • Spin transition in a ferrous chloride complex supported by a pentapyridine ligand
  • 2020
  • Ingår i: Chemical Communications. - : Royal Society of Chemistry. - 1359-7345 .- 1364-548X. ; 56:18, s. 2703-2706
  • Tidskriftsartikel (refereegranskat)abstract
    • Ferrous chloride complexes [FeIILxCl] commonly attain a high-spin state independently of the supporting ligand(s) and temperature. Herein, we present the first report of a complete spin crossover with T1/2 = 80 K in [FeII(Py5OH)Cl]+ (Py5OH = pyridine-2,6-diylbis[di(pyridin-2-yl)methanol]). Both spin forms of the complex are analyzed by X-ray spectroscopy and DFT calculations.
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36.
  • Borg, Tessie, et al. (författare)
  • Mukaiyama aldol addition to α-chloro-substituted aldehydes. Origin of the unexpected syn selectivity.
  • 2010
  • Ingår i: Chemical Communications. - : Royal Society of Chemistry (RSC). - 1359-7345 .- 1364-548X. ; 46:8, s. 1281-1283
  • Tidskriftsartikel (refereegranskat)abstract
    • The addition of sterically demanding enolsilanes to alpha-chloro aldehydes results unexpectedly in preferential formation of the anti-PFA product (1,2-syn), while the addition of the corresponding boron enolate furnishes the expected polar Felkin-Anh product (1,2-anti). A stereoinduction model explaining these observations is proposed.
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37.
  • Borgström, Björn, et al. (författare)
  • Synthetic modification of salinomycin: selective O-acylation and biological evaluation
  • 2013
  • Ingår i: Chemical Communications. - : Royal Society of Chemistry (RSC). - 1364-548X .- 1359-7345. ; 49:85, s. 9944-9946
  • Tidskriftsartikel (refereegranskat)abstract
    • Salinomycin has found renewed interest as an agent for prevention of cancer recurrence through selectively targeting cancer stem cells. Strategies for generation of improved salinomycin analogs by individual modification of its hydroxyl groups are presented. An evaluation of the dose-response effects of the resulting library on breast cancer cell lines shows that acylation of the C20 hydroxyl can be used to improve IC50 values down to one fifth that of salinomycin.
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38.
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39.
  • Boström, Hanna, et al. (författare)
  • Structure and thermal expansion of the distorted Prussian blue analogue RbCuCo(CN)(6)
  • 2019
  • Ingår i: Chemical Communications. - : ROYAL SOC CHEMISTRY. - 1359-7345 .- 1364-548X. ; 55:69, s. 10230-10233
  • Tidskriftsartikel (refereegranskat)abstract
    • The structure and thermal expansion of the Prussian blue analogue RbCuCo(CN)(6) has been determined via neutron and X-ray powder diffraction. The system crystallises in Cccm and harbours three coexisting distortions relative to the parent Fm3m structure, which leads to anisotropic thermal expansion with a near-zero component in one direction. The difficulties associated with determining octahedral tilt systems in Prussian blue analogues and related double molecular perovskites are discussed.
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40.
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41.
  • Brânzanic, Adrian M.V., et al. (författare)
  • Why does sulfite reductase employ siroheme?
  • 2019
  • Ingår i: Chemical Communications. - : Royal Society of Chemistry (RSC). - 1359-7345 .- 1364-548X. ; 55:93, s. 14047-14049
  • Tidskriftsartikel (refereegranskat)abstract
    • Sulfite reductase (SiR) contains in the active site a unique assembly of siroheme and a [4Fe4S] cluster, linked by a cysteine residue. Siroheme is a doubly reduced variant of heme that is not used for a catalytic function in any other enzyme. We have used non-equilibrium Green's function methods coupled with density functional theory computations to explain why SiR employs siroheme rather than heme. The results show that direct, through vacuum, charge-transfer routes are inhibited when heme is replaced by siroheme. This ensures more efficient channelling of the electrons to the catalytic iron during the six-electron reduction of sulfite to sulfide, limiting potential side-reactions that could occur if the incoming electrons were delocalized onto the macrocyclic ring.
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42.
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43.
  • Brice, Heloise, et al. (författare)
  • Stereocontrolled access to optically-enriched oxabispidines
  • 2012
  • Ingår i: Chemical Communications. - : Royal Society of Chemistry (RSC). - 1359-7345 .- 1364-548X. ; 48:40, s. 4836-4838
  • Tidskriftsartikel (refereegranskat)abstract
    • A range of chiral, optically-enriched bicyclic oxabispidines were prepared from (S)-(-)-2,3-epoxypropylphthalimide using an efficient sequence featuring a stereocontrolled intramolecular Mannich reaction as the key transformation.
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44.
  • Bromfield, Karen M., 1976, et al. (författare)
  • An iron carbonyl approach to the influenza neuraminidase inhibitor oseltamivir
  • 2007
  • Ingår i: Chemical Communications. - : Royal Society of Chemistry (RSC). - 1364-548X .- 1359-7345. ; :30, s. 3183-3185
  • Tidskriftsartikel (refereegranskat)abstract
    • A novel synthetic route towards oseltamivir, an influenza neuraminidase inhibitor, has been achieved employing a cationic iron carbonyl complex, providing an alternate pathway with the potential to access diverse analogues.
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45.
  • Brown, John, et al. (författare)
  • A guanidium salt as a chaotropic agent for aqueous battery electrolytes
  • 2023
  • Ingår i: Chemical Communications. - 1364-548X .- 1359-7345. ; 59:82, s. 12266-12269
  • Tidskriftsartikel (refereegranskat)abstract
    • This study investigates a salt design principle for aqueous battery electrolytes by combining chaotropic ions, guanidium cations (Gdm) and bis(trifluoromethanesulfonyl)imide anions (TFSI), forming GdmTFSI. This salt's crystal structure was solved via single-crystal X-ray diffraction and characterized using Fourier-transform infrared spectroscopy. Study reveals that GdmTFSI salt disrupts the hydrogen bonding network of aqueous solutions, impacting water reactivity at electrochemical interfaces.
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46.
  • Burghart, Armin, et al. (författare)
  • Energy transfer cassettes based on BODIPY® dyes
  • 2000
  • Ingår i: Chemical Communications. - : Royal Society of Chemistry (RSC). - 1359-7345 .- 1364-548X. ; :2203-4
  • Tidskriftsartikel (refereegranskat)abstract
    • The donor–acceptor dye cassettes 1–4 were designed to capture energy at a single wavelength and to convert it to well-resolved, intense fluorescence emissions; in practice, Stokes shifts of 40–148 nm, quantum yields of 0.12–0.60, and efficient energy transfer was demonstrated.
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47.
  • Butorin, Sergei. M., et al. (författare)
  • Characteristics of chemical bonding of pentavalent uranium in La-doped UO2
  • 2017
  • Ingår i: Chemical Communications. - : Royal Society of Chemistry (RSC). - 1359-7345 .- 1364-548X. ; 53:1, s. 115-118
  • Tidskriftsartikel (refereegranskat)abstract
    • The effect of La doping on the electronic structure of U in UO2 was studied using an advanced technique, namely, X-ray absorption spectroscopy (XAS) in the high-energy-resolution fluorescence-detection (HERFD) mode, at the U 3d(3/2) (M-4) edge. Thanks to a significant reduction of the core-hole lifetime broadening and distinct chemical shifts of the HERFD-XAS lines, the U(v) formation as a result of La doping was identified. The isolated contribution of U(v) in the M-4 HERFD-XAS spectrum reveals the so-called charge-transfer satellites due to the U 5f-O 2p hybridization. The analysis of the experimental data within the framework of the Anderson impurity model (AIM) indicates a significant change in the characteristics and degree of covalency for the chemical bonding in the U(v) subsystem of UO2 as compared to undoped UO2, which is a Mott-Hubbard system. The results are also supported by AIM calculations of X-ray photoelectron and optical absorption data.
  •  
48.
  • Börjesson, Karl, 1982, et al. (författare)
  • A Bioinspired Self Assembled Dimeric Porphyrin Pocket that Binds Electron Accepting Ligands
  • 2012
  • Ingår i: Chemical Communications. - : Royal Society of Chemistry (RSC). - 1364-548X .- 1359-7345. ; 48:12, s. 1793-1795
  • Tidskriftsartikel (refereegranskat)abstract
    • A binding pocket consisting of two zinc porphyrins self assembled by Watson-Crick base pairing is presented. The porphyrin binding pocket is located in the confined environment of a lipid membrane whereas the DNA is located in the water phase. Bidentate electron accepting ligands are shown to coordinate in-between the two porphyrins.
  •  
49.
  • Cao, Shunsheng, et al. (författare)
  • A self-switchable Ag nanoreactor exhibiting outstanding catalytic properties
  • 2014
  • Ingår i: Chemical Communications. - : Royal Society of Chemistry. - 1359-7345 .- 1364-548X. ; 50:1, s. 118-120
  • Tidskriftsartikel (refereegranskat)abstract
    • A highly efficient nanoreactor that contains silver nanoparticles in hollow silica spheres and an interpolymer network as a gate-keeper has been developed following a facile procedure. The fast "signal-triggered switch of the smart network results in a high reactivity and a high response rate, yielding improved potential for many practical applications.
  •  
50.
  • Capece, Sabrina, et al. (författare)
  • A general strategy for obtaining biodegradable polymer shelled microbubbles as theranostic devices
  • 2013
  • Ingår i: Chemical Communications. - 1359-7345 .- 1364-548X. ; 49:51, s. 5763-5765
  • Tidskriftsartikel (refereegranskat)abstract
    • Fabrication of multifunctional ultrasound contrast agents (UCAs) has been recently addressed by several research groups. A versatile strategy for the synthesis of UCA precursors in the form of biodegradable vesicles with a biocompatible crosslinked polymer shell is described. Upon ultrasound irradiation, acoustic droplet vaporization transforms such particles into microbubbles behaving as UCAs. This proof of concept entails the features of a potential theranostic microdevice.
  •  
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