| 1. |
- Albinsson, Bo, 1963, et al.
(författare)
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Electron Transfer Through Butadiyne-Linked Porphyrin-Based Molecular Wires
- 2012
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Ingår i: Multiporphyrin Arrays: Fundamentals and Applications. - : Pan Stanford Publishing. - 9789814364287 ; , s. 55-90
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- Electron transfer is of fundamental importance in many areas of chemistry and biochemistry [1]. The ability to transfer charge efficiently over distances in the 10 nm range is crucial in various practical devices, such as organic transistors and solar cells both dye-sensitized metal oxide solar cells and bulk-heterojunction blend devices [2]. Furthermore, in the context of the ever-decreasing dimensions of integrated circuits, it is interesting to study charge transport through individual molecules [3]. Organic π -conjugated oligomers and polymers are attractive candidates as molecularwires, because modern synthetic chemistry can be used to create almost any type of π -conjugated backbone, while non-covalent interactions and supramolecular chemistry can be used to modify the backbone conformation. Interactions of conjugated oligomers, both with each other and with the external environment, can also be controlled by self-assembly and non-covalent encapsulation.
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| 2. |
- Albinsson, Bo, 1963
(författare)
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ENERGY TRANSFER On the right path
- 2011
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Ingår i: Nature Chemistry. - : Springer Science and Business Media LLC. - 1755-4349 .- 1755-4330. ; 3:4, s. 269-270
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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| 3. |
- Albinsson, Bo, 1963, et al.
(författare)
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Excitation energy transfer in donor-bridge-acceptor systems
- 2010
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Ingår i: Physical Chemistry Chemical Physics. - : Royal Society of Chemistry (RSC). - 1463-9084 .- 1463-9076. ; 12:27, s. 7338-7351
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Tidskriftsartikel (refereegranskat)abstract
- This perspective will focus on the mechanistic aspects of singlet and triplet excitation energy transfer. Well defined donor-bridge-acceptor systems specifically designed for investigating the distance and energy gap dependencies of the energy transfer reactions are discussed along with some recent developments in computational modeling of the electronic coupling.
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| 4. |
- Albinsson, Bo, 1963, et al.
(författare)
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Functionalized DNA Nanostructures for Light Harvesting and Charge Separation
- 2012
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Ingår i: Coordination Chemistry Reviews. - : Elsevier BV. - 0010-8545. ; 256:21-22, s. 2399-2413
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Forskningsöversikt (refereegranskat)abstract
- Mimicking natural photosynthesis by covalently arranging antenna and charge separation units is a formidable task. Many such beautiful supramolecular complexes have been designed and synthesized with large efforts, some of which are presented in this special issue. The ability to predict relative position of and electronic coupling between the active components in covalent arrays is quite high but there are two obvious drawbacks with the covalent approach. Firstly, as the size grows the complexity of the organic synthesis increases and secondly, sensitivity to light-induced damage becomes a major issue if covalent bonds are broken. Self-assembly of the photoactive components should, in principle, provide a solution to both these issues but generally the ability to predict position and electronic coupling is too low to have the designed properties needed for a functional artificial photosynthetic complex. Here, we present an approach of using DNA as a template for arranging both charge separation units and antenna molecules that govern long-range energy transfer. Of particular interest is the ability of DNA to function as a scaffold for chromophores, either through covalent attachment, or through non-covalent association by means of intercalation or grove binding. Using controlled positioning of dyes, multichromophoric assemblies can be created, capable of long range communication through multi-step energy transfer. This facilitates creation of DNA-based photonic devices for both light harvesting and directed information transfer. The channeled excitation energy can be transformed site specifically to chemical energy by charge separation of DNA linked porphyrins. A two phase system is discussed, in which the DNA is located in buffered solution whereas the hydrophobic porphyrins, responsible for the charge separation reaction, are located in the lipid bilayer of liposomes or supported lipid bilayers.
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| 5. |
- Albinsson, Bo, 1963, et al.
(författare)
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Multistep FRET and Nanotechnology
- 2013
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Ingår i: FRET - Förster Resonance Energy Transfer: From Theory to Applications. - : Wiley. ; , s. 607-653
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 6. |
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| 7. |
- Börjesson, Karl, 1982, et al.
(författare)
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A Bioinspired Self Assembled Dimeric Porphyrin Pocket that Binds Electron Accepting Ligands
- 2012
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Ingår i: Chemical Communications. - : Royal Society of Chemistry (RSC). - 1364-548X .- 1359-7345. ; 48:12, s. 1793-1795
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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.
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| 8. |
- Börjesson, Karl, 1982, et al.
(författare)
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Conjugated anthracene dendrimers with monomer-like fluorescence
- 2014
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Ingår i: RSC Advances. - : Royal Society of Chemistry (RSC). - 2046-2069. ; 4:38, s. 19846-19850
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Tidskriftsartikel (refereegranskat)abstract
- Two generations of highly emissive conjugated anthracene dendrimers containing up to 9 anthracene units are presented. In these dendrimers, anthracene-like absorption and emission properties are preserved due to the relatively weak electronic coupling between the anthracene units, while evidence of fast crosstalk within the molecular framework is still observed.
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| 9. |
- Börjesson, Karl, 1982, et al.
(författare)
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Functionalized Nanostructures: Redox-Active Porphyrin Anchors for Supramolecular DNA Assemblies
- 2010
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Ingår i: ACS Nano. - : American Chemical Society (ACS). - 1936-086X .- 1936-0851. ; 4:9, s. 5037-5046
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Tidskriftsartikel (refereegranskat)abstract
- We have synthesized and studied a supramolecular system comprising a 39-mer DNA with porphyrin-modified thymidine nucleosides anchored to the surface of large unilamellar vesicles (liposomes). Liposome porphyrin binding characteristics, such as orientation, strength, homogeneity, and binding site size, was determined, suggesting that the porphyrin is well suited as a photophysical and redox-active lipid anchor, in comparison to the inert cholesterol anchor commonly used today. Furthermore, the binding characteristics and hybridization capabilities were studied as a function of anchor size and number of anchoring points, properties that are of importance for our future plans to use the addressability of these redox-active nodes in larger DNA-based nanoconstructs. Electron transfer from photoexcited porphyrin to a lipophilic benzoquinone residing in the lipid membrane was characterized by steady-state and time-resolved fluorescence and verified by femtosecond transient absorption.
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| 10. |
- Börjesson, Karl, 1982, et al.
(författare)
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Photon up-conversion and molecular solar thermal energy storage: New materials and devices
- 2014
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Ingår i: 2014 IEEE Photonics Conference, IPC 2014. ; , s. 445-446
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Konferensbidrag (refereegranskat)abstract
- In a future society with limited access to fossil fuels, technologies for efficient on demand delivery of renewable energy are highly desirable. In this regard, methods that allow for solar energy storage and on demand solar driven energy generation are particularly relevant since the sun is the most abundant energy source.
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