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| 4. |
- Andreasson, Joakim, 1973, et al.
(författare)
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Molecular 2 : 1 digital multiplexer
- 2007
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Ingår i: Angewandte Chemie - International Edition. - : Wiley. - 1433-7851 .- 1521-3773. ; 46:6, s. 958-961
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Tidskriftsartikel (refereegranskat)abstract
- (Chemical Equation Presented) Two into one: A porphyrin linked to two photochromic moieties performs as a 2:1 digital multiplexer (MUX). It takes heat and red light as the two inputs (in 1 and in 2), and a third switchable input (green light, sel) selects whether the output (porphyrin fluorescence) reports the state of in 1 or in 2. Each photochromic moiety may be independently photoisomerized to isomers that quench the porphyrin fluorescence. © 2007 Wiley-VCH Verlag GmbH & Co. KGaA.
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| 5. |
- Andreasson, Joakim, 1973, et al.
(författare)
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Molecular AND logic gate based on electric dichroism of a photochromic dihydroindolizine
- 2005
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Ingår i: Angewandte Chemie - International Edition. - : Wiley. - 1433-7851 .- 1521-3773. ; 44:46, s. 7591-7594
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Tidskriftsartikel (refereegranskat)abstract
- (Chemical Equation Presented) Very ANDy: A photochromic molecular switch has been found to act as an AND Boolean logic gate. The switch takes as input both UV light, which causes photo-isomerization of a dihydroindolizine to an open, dipolar form, and an electric field, which aligns this isomer in solution (see scheme). The output of the gate is read as the electric linear dichroism response of the open isomer. The gate can be reset with visible light. © 2005 Wiley-VCH Verlag GmbH & Co. KGaA.
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| 9. |
- Bach, Anders, et al.
(författare)
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Design and synthesis of highly potent and plasma-stable dimeric inhibitors of the PSD-95-NMDA receptor interaction
- 2009
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Ingår i: Angewandte Chemie International Edition. - : Wiley-VCH. - 1433-7851 .- 1521-3773. ; 48:51, s. 9685-9689
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Tidskriftsartikel (refereegranskat)abstract
- On the double: Dimerization of monomeric peptide ligands towards the PDZ domains of the protein PSD-95 (postsynaptic density 95) leads to potent inhibitors of protein-protein interactions with stability in blood plasma. Optimization of the length of the polyethylene glycol linker results in unprecedented affinity for inhibitors of the PDZ1-2 domain.
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- Bauer, Brigitte, 1978, et al.
(författare)
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Proteomic Analysis of Plasma Membrane Vesicles
- 2009
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Ingår i: Angewandte Chemie - International Edition. - : Wiley. - 1433-7851 .- 1521-3773. ; 48:9, s. 1656-1659
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Tidskriftsartikel (refereegranskat)abstract
- (Figure Presented) A simple and scalable method is presented for harvesting, purification, and on-chip processing of mammalian plasma membrane vesicles (PMVs) optimized for downstream proteome analysis. After immobilization on a microfluidic flow-cell of PMVs, the embedded membrane proteins are proteolytically digested, and the peptides harvested and analyzed by LC-MS/MS. Over 93% of the detected proteins are plasma-membrane-derived. © 2009 Wiley-VCH Verlag GmbH & Co. KGaA.
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| 15. |
- Bernhardt, Peter, et al.
(författare)
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Molecular basis of perhydrolase activity in serine hydrolases
- 2005
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Ingår i: Angewandte Chemie International Edition. - : Wiley. - 1433-7851 .- 1521-3773. ; 44:18, s. 2742-2746
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Tidskriftsartikel (refereegranskat)abstract
- (Chemical Equation Presented) Changing substrates: A mutation that forms a cis-proline-peptide bond in a loop structure close to the active site of an aryl esterase from Pseudomonas fluorescens converts the enzyme into a perhydrolase (see picture). The switch in activity is explained by a new hydrogen bond formed between a backbone carbonyl oxygen atom and the peroxy deacylation intermediate.
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| 16. |
- Björling, T., et al.
(författare)
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SrAlSiH : A polyanionic semiconductor hydride
- 2005
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Ingår i: Angewandte Chemie International Edition. - : Wiley. - 1433-7851 .- 1521-3773. ; 44:44, s. 7269-7273
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Tidskriftsartikel (refereegranskat)abstract
- (Chemical Equation Presented) Stable and semiconducting: Polyanionic hydrides represent a new class of main-group-metal hydrides with unforeseen hydrogen-coordination environments. The hydrogen atom in SrAlSiH is attached exclusively to Al and forms part of a layered [AlHSi]2- polyanion (see figure). This material is the first narrow bandgap semiconductor hydride and combines the high thermal stability of saline hydrides with the air and moisture stability of interstitial transition-metal hydrides.
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- Caleman, Carl, et al.
(författare)
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Picosecond Melting of Ice by an Infrared Laser Pulse
- 2008
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Ingår i: Angewandte Chemie International Edition. - : Wiley. - 1433-7851 .- 1521-3773. ; 47:8, s. 1417-1420
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Tidskriftsartikel (refereegranskat)abstract
- Cold as ice: Molecular dynamics simulation provides snapshots of a melting ice crystal (see picture). The laser pulse heats up the system, and the energy is absorbed in the OH bonds. After a few picoseconds, the energy is transferred to rotational and translational energy, causing the crystal to melt. The melting starts as a nucleation process, and even long after the first melting is initialized, pockets of crystalline structures can be found.
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| 22. |
- Christensen, Kirsten E, et al.
(författare)
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A germanate built from 68126 cavity co-templated by a (H2O)16 water cluster and 2-methylpiperazine
- 2008
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Ingår i: Angewandte Chemie International Edition. - : Wiley. - 1433-7851 .- 1521-3773. ; 47:41, s. 7868-7871
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Tidskriftsartikel (refereegranskat)abstract
- Totally tubular: A new tubular germanate is cotemplated by 2-methylpiperazine and an (H2O)16 cluster in a hydro(solvo)thermal synthesis. The germanate features a large, highly symmetric 68126 cavity (see picture; yellow sphere) built from 12 Ge7X19 (X=O, OH, F) clusters (GeX6 red, GeX5 yellow, GeX4 green).
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| 23. |
- Chubarova, Elena V., et al.
(författare)
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Self-assembly of a heteropolyoxopalladate nanocube : [PdII 13AsV 8O34(OH)6] 8-
- 2008
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Ingår i: Angewandte Chemie International Edition. - : Wiley. - 1433-7851 .- 1521-3773. ; 47:49, s. 9542-9546
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Tidskriftsartikel (refereegranskat)abstract
- (Chemical Equation Presented) Not like the others: A molecular palladium oxide cluster was formed by self-assembly of palladium(II) and arsenic(V) using mild reaction conditions. The resulting heteropolypalladate [Pd II 13AsV 8O34(OH) 6]8- has a distorted cubic shape and edge lengths of about 1 nm. The thirteen PdII ions retain four-coordinate square-planar geometry, in marked contrast to all other known discrete polyoxometalates.
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| 29. |
- Eng, Mattias P, 1977, et al.
(författare)
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Non-exponential distance dependence of bridge-mediated electronic coupling
- 2006
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Ingår i: Angewandte Chemie - International Edition. - : Wiley. - 1433-7851 .- 1521-3773. ; 45:34, s. 5626-5629
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Tidskriftsartikel (refereegranskat)abstract
- Donor chromophores attached to oligo-(phenyleneethynylene) molecular bridges of varying length have attenuation factors for electron tunneling β that vary systematically with the donor-bridge (DB) energy gap (see picture). Investigations show that for bridges with ethynylene and vinylene repeating subunits, the electronic coupling increases with increasing donor-acceptor (DA) distance. A simple model accounts for this unexpected observation. (Figure Presented). © 2006 Wiley-VCH Verlag GmbH & Co. KGaA.
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| 30. |
- Filippini, Daniel, 1968-, et al.
(författare)
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Chemical Sensing with Familiar Devices
- 2006
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Ingår i: Angewandte Chemie : : a journal of the Gesellschaft Deutscher Chemiker.. International edition. - : Wiley. ; 45:23, s. 3800-3803
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Tidskriftsartikel (refereegranskat)
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| 36. |
- Gibson, Elizabeth A., et al.
(författare)
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A p-Type NiO-Based Dye-Sensitized Solar Cell with an Open-Circuit Voltage of 0.35 V
- 2009
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Ingår i: Angewandte Chemie International Edition. - : Wiley. - 1433-7851 .- 1521-3773. ; 48:24, s. 4402-4405
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Tidskriftsartikel (refereegranskat)abstract
- In tandem: Employing a molecular dyad and a cobalt-based electrolyte gives a threefold-increase in open-circuit voltage (VOC) for a p-type NiO device (VOC=0.35 V), and a fourfold better energy conversion efficiency. Incorporating these improvements in a TiO2/NiO tandem dye-sensitized solar cell (TDSC), results in a TDSC with a VOC=0.91 V
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| 38. |
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| 39. |
- Hagberg, Daniel, 1977-, et al.
(författare)
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A Light Resistant Organic Sensitizer for Solar Cell Applications
- 2009
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Ingår i: Angewandte Chemie International Edition. - Weinheim : Wiley-VCH Verlag GmbH & Co.. - 1433-7851 .- 1521-3773. ; 48, s. 1576-1580
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Tidskriftsartikel (refereegranskat)abstract
- (Figure Presented) Finely tuned: A stable dye-sensitized solar cell that contains a molecularly engineered organic dye has been prepared. The efficiency of the cell remains at 90% after 1000 h of light soaking at 60 °C. The remarkable stability of the cell is also reflected in the open-circuit voltage value (Voc), short-circuit photocurrent-density value (J sc), and the fill factor, which also show barely no decline (see picture).
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| 40. |
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| 41. |
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| 42. |
- Hoffmann, Markus, et al.
(författare)
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Enhanced pi conjugation around a porphyrin[6] nanoring
- 2008
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Ingår i: Angewandte Chemie - International Edition. - : Wiley. - 1433-7851 .- 1521-3773. ; 47:27, s. 4993-4996
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Tidskriftsartikel (refereegranskat)abstract
- (Figure Presented) Strong cycle: The cyclic hexamer-template complex 3 obtained through template-directed trimerization of a porphyrin dimer 2, using a hexapyridyl template 1, is extremely stable (K f =7×10 38 m -1 ), but the free macrocycle 4 can be liberated using amine ligands. Spectroscopic data and DFT calculations show that the cyclic hexamer is more conjugated than its linear analogue. © 2008 Wiley-VCH Verlag GmbH & Co. KGaA.
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| 43. |
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| 44. |
- Ibrahem, Ismail, et al.
(författare)
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Enantioselective Organocatalytic Hydrophosphination of α,β-Unsaturated Aldehydes
- 2007
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Ingår i: Angewandte Chemie International Edition. - : Wiley. - 1433-7851 .- 1521-3773. ; 46:24, s. 4507-4510
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Tidskriftsartikel (refereegranskat)abstract
- Keeping it simple: Optically active phosphine derivatives can be obtained in high yields and in up to 99% ee by using simple chiral amines to catalyze the hydrophosphination of α,β-unsaturated aldehydes (see scheme, green sphere = chiral group). The synthetic utility of this highly chemo- and enantioselective transformation was exemplified by the one-pot asymmetric synthesis of β-phosphine oxide acids.
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| 45. |
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| 46. |
- Jönsson, Håkan, et al.
(författare)
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Detection and Analysis of Low-Abundance Cell-Surface Biomarkers Using Enzymatic Amplification in Microfluidic Droplets
- 2009
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Ingår i: Angewandte Chemie International Edition. - : Wiley. - 1433-7851 .- 1521-3773. ; 48:14, s. 2518-2521
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Tidskriftsartikel (refereegranskat)abstract
- Finding the few: Cell-surface proteins are useful disease biomarkers, but current high-throughput methods are limited to detecting cells expressing more than several hundred proteins. Enzymatic amplification in microfluidic droplets (see picture) is a high-throughput method for detection and analysis of cell-surface biomarkers expressed at very low levels on individual human cells. Droplet optical labels allow concurrent analysis of several samples.
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| 47. |
- Larsson, Per-Fredrik, 1983, et al.
(författare)
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Copper-catalyzed cross-couplings with part-per-million catalyst loadings.
- 2009
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Ingår i: Angewandte Chemie (International ed. in English). - : Wiley. - 1521-3773. ; 48:31, s. 5691-3
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Tidskriftsartikel (refereegranskat)abstract
- Homeopathic doses: The presence of 0.001 mol % of a copper salt can be sufficient to catalyze arylation reactions of various nucleophiles with phenyl iodide. The two most important factors governing the reaction outcome are the ligand quantity and the temperature.
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| 48. |
- Lennartson, Anders, 1980, et al.
(författare)
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A different approach to enantioselective organic synthesis: absolute asymmetric synthesis of organometallic reagents.
- 2009
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Ingår i: Angewandte Chemie (International ed. in English). - : Wiley. - 1521-3773 .- 1433-7851. ; 48:17, s. 3137-40
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Tidskriftsartikel (refereegranskat)abstract
- Voilà, optical activity: Both enantiomers of 1-chloroindene have been synthesized in high selectivity from solely achiral starting materials, and without using optically active catalysts (see scheme). These symmetry-breaking syntheses provide a proof-of-concept for a new approach to asymmetric synthesis. NCS=N-chlorosuccinimide.
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| 49. |
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| 50. |
- Lennartson, Anders, 1980, et al.
(författare)
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Total spontaneous resolution of five-coordinate complexes.
- 2009
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Ingår i: Angewandte Chemie (International ed. in English). - : Wiley. - 1521-3773 .- 1433-7851. ; 48:32, s. 5869-71
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Tidskriftsartikel (refereegranskat)abstract
- Talking about a resolution: Bulk quantities of five-coordinate complexes have been resolved for the first time using zinc and cadmium diethyldithiocarbamate species. The stereochemical outcome can be controlled by seeding with the desired isomer, giving access to either enantiomer in high enantiomeric excess and yield.
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