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Light harvesting subphthalocyanine-ferrocene dyads: Fast electron transfer process studied by femtosecond laser photolysis

Title
Light harvesting subphthalocyanine-ferrocene dyads: Fast electron transfer process studied by femtosecond laser photolysis
Authors
El-Khouly, Mohamed E.El-Kemary, Maged A.El-Refaey, AhmedKay, Kwang-YolFukuzumi, Shunichi
Ewha Authors
Shunichi Fukuzumi
SCOPUS Author ID
Shunichi Fukuzumiscopus
Issue Date
2016
Journal Title
JOURNAL OF PORPHYRINS AND PHTHALOCYANINES
ISSN
1088-4246JCR Link1099-1409JCR Link
Citation
vol. 20, no. 42958.0, pp. 1148 - 1155
Keywords
subphthalocyanineferroceneelectron transferlaser photolysis
Publisher
WORLD SCI PUBL CO INC
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Ferrocene-subphthalocyanine dyads characterized, where ferrocene is axially linked with subphthalocyanine at its axial position with the B-O bond through the para and meta positions, namely Fc-pPhO-SubPc (dyad 1) and Fc-mPhO-SubPc (dyad 2). The geometric and electronic structures of 1 and 2 were probed by ab initio B3LYP/6-311G methods. The optimized structures showed that the Fc and SubPc entities are separated by 8.42 and 7.40 angstrom for dyads 1 and 2, respectively. The distribution of the highest occupied frontier molecular orbital (HOMO) was found to be located on the Fc entity, while the lowest unoccupied molecular orbital (LUMO) was located on the SubPc entity, suggesting that the charge-separated states of the are Fc(+)-SubPc(center dot-). Upon photoexcitation at the subphthalocyanine unit, both dyads undergo photoinduced electron transfer to form the corresponding charge-separated species, Fc(+)-SubPc(center dot-). Based on their redox potentials determined by cyclic voltammetry technique, the direction of the charge separation and the energies of these states have been revealed. Femtosecond transient spectroscopic studies have revealed that a fast charge separation of 8.8 x 10(10) and 1.2 x 10(11) s(-1) for 1 and 2, respectively, indicating fast charge separation in these simple dyads.
DOI
10.1142/S1088424616500784
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
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