Electron transfer and energy transfer of photoexcited C60 in the presence of retinols

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Publication Date
DOI 10.1039/A904772G
Impact Factor 3.676
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Abstract

Electron transfer and energy transfer between the photo-excited triplet state of C60 (3C60*) and retinols, retinal and retinoic acid have been investigated by laser flash photolysis. In polar solvent, with the decay of the transient absorption band of 3C60* at 740 nm, the rise of the anion radical of C60 (C60-•) at 1070 nm and cation radicals of retinols [(retinols)+•] at 600 and 940 nm were observed in addition to the triplet state of retinols [3(retinols)*] at 400 nm. For retinal and retinoic acid, energy transfer occurs predominantly even in polar solvent, nevertheless the electron donor abilities of retinal and retinoic acid evaluated from the oxidation potentials are similar to those of retinols. The quantum yield and rate constant of electron transfer for trans-retinol are slightly faster than that for cis-retinol. After electron transfer, the cation radicals of retinols disappeared mainly by back electron transfer; however, some reactions of (retinols)+• such as intra- and inter-molecular ring closing reactions also occur, yielding persistent C60-•.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
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Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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