TY - JOUR
T1 - Efficient production of methyl viologen cation radicals using RuII systems
AU - Akasheh, Talal S.
AU - Al-Rawashdeh, Nathir A.F.
N1 - Funding Information:
the research grant from the Ministry of Planning, Fund and Yarmouk University. This work is part
PY - 1990/11/15
Y1 - 1990/11/15
N2 - A number of RuII-diimine complexes were used to photosensitize methyl viologen cation radical (MV+{radical dot}) production in the presence of ethylenediaminetetraacetic acid (EDTA). An unusually high quantum yield (π(MV+{radical dot}) = 1.88) was obtained for [Ru(bpz)2dpq]2+ (bpz = 2′,2-bipyrazine; dpq = 2,3-di-(2′-pyridyl)-quinoxaline) at pH 11. This value is higher than any previously known for RuII complexes. The quantum yield is discussed in terms of the electron transfer quenching process and the cage escape effects which affect geminate recombination of the redox species. Time-resolved transient absorption spectra were used to study the formation of MV+{radical dot} and RuI in the case of [Ru(bpz)2(dpq)]2+.
AB - A number of RuII-diimine complexes were used to photosensitize methyl viologen cation radical (MV+{radical dot}) production in the presence of ethylenediaminetetraacetic acid (EDTA). An unusually high quantum yield (π(MV+{radical dot}) = 1.88) was obtained for [Ru(bpz)2dpq]2+ (bpz = 2′,2-bipyrazine; dpq = 2,3-di-(2′-pyridyl)-quinoxaline) at pH 11. This value is higher than any previously known for RuII complexes. The quantum yield is discussed in terms of the electron transfer quenching process and the cage escape effects which affect geminate recombination of the redox species. Time-resolved transient absorption spectra were used to study the formation of MV+{radical dot} and RuI in the case of [Ru(bpz)2(dpq)]2+.
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U2 - 10.1016/1010-6030(90)85002-E
DO - 10.1016/1010-6030(90)85002-E
M3 - Article
AN - SCOPUS:0000856987
SN - 1010-6030
VL - 54
SP - 283
EP - 292
JO - Journal of Photochemistry and Photobiology, A: Chemistry
JF - Journal of Photochemistry and Photobiology, A: Chemistry
IS - 3
ER -