Competitive photoinduced electron transfer by the complex formation of porphyrin with cyclodextrin bearing viologen.
نویسندگان
چکیده
Photoinduced electron transfer between a porphyrin and a new guest cyclodextrin bearing viologen occurs by a supramolecular formation with conformational change of a guest molecule.
منابع مشابه
Photoinduced electron transfer between metal-coordinated cyclodextrin assemblies and viologens.
Two novel tris(bipyridine)ruthenium(II) complexes bearing two and six beta-cyclodextrin binding sites on their ligands have been synthesised and characterised. Complex 1, bearing two cyclodextrins, adopts a conformation in aqueous solution where parts of the aromatic ligands are self-included into the cyclodextrin moieties. This results in a loss of symmetry of the complex and gives rise to a m...
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Magnetic field effects on photo induced electron transfer reaction have been of much interest in a view of designing an effective light energy conversion system. Supramolecular system is known as a convenient tool to construct effective donor-acceptor structures for the reaction. In this review, we briefly describe our studies of supramolecular type complexation of porphyrin-viologen linked com...
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Sequential adsorption of polyanions and polycations was used to make a five-component energy/ electron-transfer cascade, which mimics some of the functions of natural photosynthetic assemblies. The photon antenna part of the system consists of coumarinand fluorescein-derivatized poly(allylamine hydrochloride) (Coum-PAH and Fl-PAH), palladium(II)tetrakis(4-N,N,N-trimethylanilinium) porphyrin (Pd...
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Andersson, M. 2000. Tuning Electron Transfer Reactions by Selective Excitation in Porphyrin Acceptor Assemblies. Acta Universitatis Upsaliensis. Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology 578. 58 pp. Uppsala. ISBN 91-554-48437. This thesis concerns electron transfer reactions from different excited states in porphyrins, and the effect of changing...
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Charge-transfer (CT) π-complexes are formed between planar porphyrins and 1,4,5,8,9,12-hexaazatriphenylene (HAT) derivatives with large formation constants (e.g., 104 M-1), exhibiting broad CT absorption bands. The unusually large formation constants result from close face-to-face contact between two planar π-planes of porphyrins and HAT derivatives. The redox potentials of porphyrins and HAT d...
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ورودعنوان ژورنال:
- Chemical communications
دوره 40 شماره
صفحات -
تاریخ انتشار 2006