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Transient storage of photochemically produced oxidative and reductive equivalents in soluble redox polymers

Journal Article · · J. Phys. Chem.; (United States)
DOI:https://doi.org/10.1021/j100277a007· OSTI ID:5816289
Optical excitation and electron-transfer quenching of the metal to ligand charge-transfer (MLCT) excited state(s) of ((5-NH/sub 2/-phen)Ru(bpy)/sub 2/)/sup 2 +/ occur in solutions containing polystyrene polymers in which either pendant paraquat (PQ/sup 2 +/) or phenothiazine (PTZ) sites are attached. The quenching and subsequent electron-transfer steps lead to the appearance of -PQ/sup +/ and -PTZ/sup +/ on separate polymers. Since electron transfer between -PQ/sup +/ and -PTZ/sup +/ sites on separate polymers is slow, the lifetime of the photochemically produced oxidative and reductive equivalents is enhanced by approx.10/sup 3/ compared to related monomeric quenchers under similar conditions. 7 references, 1 figure.
Research Organization:
Univ. of North Carolina, Chapel Hill
DOE Contract Number:
AS05-78ER06034
OSTI ID:
5816289
Journal Information:
J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 90:5; ISSN JPCHA
Country of Publication:
United States
Language:
English