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A subphthalocyanine-pyrene dyad: electron transfer and singlet oxygen generation

Title
A subphthalocyanine-pyrene dyad: electron transfer and singlet oxygen generation
Authors
El-Khouly, Mohamed E.El-Refaey, AhmedNam, WonwooFukuzumi, ShunichiGoktug, OzgeDurmus, Mahmut
Ewha Authors
남원우Shunichi Fukuzumi
SCOPUS Author ID
남원우scopus; Shunichi Fukuzumiscopus
Issue Date
2017
Journal Title
PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES
ISSN
1474-905XJCR Link1474-9092JCR Link
Citation
vol. 16, no. 10, pp. 1512 - 1518
Publisher
ROYAL SOC CHEMISTRY
Indexed
SCI; SCIE; SCOPUS; KCI WOS
Abstract
A light harvesting subphthalocyanine-pyrene dyad has been synthesized and characterized by linking pyrene (Py) with subphthalocyanine (SubPc) at its axial position with the B-O bond through the para position of the benzene group. Upon photoexcitation at the pyrene unit of the dyad, an efficient electron transfer from the singlet-excited state of Py to SubPc was observed. The electron transfer features were also observed by exciting the SubPc entity, but with slower rates (similar to 10(8) s(-1)). From the electrochemical measurements, the negative driving forces for charge separation via both the singlet states of Py and SubPc in the polar solvents indicate that the electron transfer is thermodynamically feasible. Interestingly, the examined compounds showed relatively high efficiency for producing the singlet oxygen (Phi(Delta) = similar to 0.70). The collected data suggested the usefulness of the examined subphthalocyanine-pyrene dyad as a model of light harvesting system, as well as a sensitizer for photodynamic therapy.
DOI
10.1039/c7pp00166e
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자연과학대학 > 화학·나노과학전공 > Journal papers
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