Flattened Calixarene-like Cyclic BODIPY Array: A New Photosynthetic Antenna Model
| Autor: | Vincent M. Lynch, Jonathan L. Sessler, Taeyeon Kim, Xian-Sheng Ke, Dongho Kim |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010405 organic chemistry
Exciton General Chemistry 010402 general chemistry Photochemistry 01 natural sciences Biochemistry Fluorescence Acceptor Catalysis 0104 chemical sciences chemistry.chemical_compound Colloid and Surface Chemistry chemistry Excited state Calixarene Ultrafast laser spectroscopy BODIPY Absorption (electromagnetic radiation) |
| Zdroj: | Journal of the American Chemical Society. 139:13950-13956 |
| ISSN: | 1520-5126 0002-7863 |
| DOI: | 10.1021/jacs.7b08611 |
| Popis: | A cyclic BODIPY array, characterized by a rigid flattened calixarene-like conformation, acts as a photosynthetic antenna mimic. The system in question, triBODIPY, is a better antenna than the corresponding BF2-free ligand. On the basis of absorption spectral studies and supporting calculations, it is concluded that exciton coupling between the BODIPY subunits occurs readily. TriBODIPY supports a complex with Li+@C60 that bring an antenna-like light absorber into close proximity to an electronic acceptor without the need for linking spacers. As inferred from X-ray diffraction analyses of complexes between triBODIPY and C60, it is inferred that the fullerene complexes are stabilized via convex-concave donor-acceptor interactions. Steady state absorption/fluorescence, time-correlated single photon counting, and transient absorption measurements have allowed a complete characterization of the complexes in both the ground and excited states, including the host-guest recognition features, fluorescence quenching effects, and charge separation/recombination dynamics. |
| Databáze: | OpenAIRE |
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