Facile method for spectroscopic examination of radical ions of hydrophilic carotenoids

Literature Information

Publication Date 2009-06-09
DOI 10.1039/B905454E
Impact Factor 3.676
Authors

K. Razi Naqvi, Thor Bernt Melø, Tamás Jávorfi, Sergio González-Pérez


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Abstract

Hydrophilic carotenoids, unusual members of an intrinsically hydrophobic family, and their radical ions are important reactants. An all-optical method for generating singly charged radical ions of a hydrophilic carotenoid (Car) is described. It relies on photolyzing an aqueous mixture of Car and a photoionizable auxiliary solute (A), and making conditions conducive to the capture, by Car, of the hydrated electron (e−aq) or the positive hole in A˙+ or both. When A is Trolox (TOH), only e−aq can be captured, since TOH˙+ deprotonates too rapidly to be a hole donor; when A is Trolox methyl ether (TOMe), both Car˙− and Car˙+ are formed, since TOMe˙+ lives long enough to transfer its positive hole to Car; formation of Car˙− is prevented under aerobic conditions.

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Source Journal

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
Articles per Year: 3036

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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