ZnTBPPc光物理化学性质的溶剂化效应

doi:10.3866/PKU.WHXB20110508

物理化学学报 >> 2011, Vol. 27 >> Issue (05): 1045-1052.doi: 10.3866/PKU.WHXB20110508

ZnTBPPc光物理化学性质的溶剂化效应

OGUNSIPEAbimbola¹, NYOKONGTebello²

1. Department of Chemistry, Kwara State University, Malete; P.M.B 1530, Ilorin, Nigeria;
2. Department of Chemistry, Rhodes University, Grahamstown 6140, South Africa

收稿日期:2010-12-09 修回日期:2011-02-27 发布日期:2011-04-28
通讯作者: NYOKONG Tebello E-mail:t.nyokong@ru.ac.za
基金资助:
The project was supported by the Department of Science and Technology (DST) and National Research Foundation (NRF) of South Africa through DST/NRF South African Research Chairs Initiative for Professor of Medicinal Chemistry and Nanotechnology and Rhodes University.

Solvent Effects on the Photophysicochemical Properties of Tetra(tert-butylphenoxy)phthalocyaninato Zinc(II)

OGUNSIPE Abimbola¹, NYOKONG Tebello²

1. Department of Chemistry, Kwara State University, Malete; P.M.B 1530, Ilorin, Nigeria;
2. Department of Chemistry, Rhodes University, Grahamstown 6140, South Africa

Received:2010-12-09 Revised:2011-02-27 Published:2011-04-28
Contact: NYOKONG Tebello E-mail:t.nyokong@ru.ac.za
Supported by:
The project was supported by the Department of Science and Technology (DST) and National Research Foundation (NRF) of South Africa through DST/NRF South African Research Chairs Initiative for Professor of Medicinal Chemistry and Nanotechnology and Rhodes University.

摘要/Abstract

摘要：

The solvent viscosity dependence of the photophysical and photochemical properties of tetra(tert-butylphenoxy)phthalocyaninato zinc(II) (ZnTBPPc) is presented. The fluorescence quantum yields (Φ_F) and Stern-Volmer′s constant (K_SV) for ZnTBPPc fluorescence quenching by benzoquinone in all the solutions followed a semi-empirical law that depends only on the solvent viscosity. Φ_F values vary between 0.08 in tetrahydrofuran (THF) and 0.14 in dimethylsulphoxide (DMSO). Triplet quantum yields (Φ_T) and lifetimes (τ_T) also exhibit clear solvent viscosity dependence with the values being higher in the most viscous solvents. The interaction of the ZnTBPPc triplet state with oxygen was found to be diffusion- controlled, but higher rate constants were observed in low-viscosity solvents like THF and toluene. Absolute values of singlet oxygen quantum yields (Φ_Δ) were determined, and the values are comparable in all the solvents, which is attributed to the proximity of the ZnTBPPc triplet energies in different solvents.

关键词: Phthalocyanine, Solvent, Viscosity, Fluorescence, Triplet state, Singlet oxygen

Abstract:

Key words: Phthalocyanine, Solvent, Viscosity, Fluorescence, Triplet state, Singlet oxygen

OGUNSIPEAbimbola, NYOKONGTebello. ZnTBPPc光物理化学性质的溶剂化效应[J]. 物理化学学报, 2011, 27(05): 1045-1052.

OGUNSIPE Abimbola, NYOKONG Tebello. Solvent Effects on the Photophysicochemical Properties of Tetra(tert-butylphenoxy)phthalocyaninato Zinc(II)[J]. Acta Phys. -Chim. Sin., 2011, 27(05): 1045-1052.

链接本文: https://www.whxb.pku.edu.cn/CN/10.3866/PKU.WHXB20110508

https://www.whxb.pku.edu.cn/CN/Y2011/V27/I05/1045

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ZnTBPPc光物理化学性质的溶剂化效应

Solvent Effects on the Photophysicochemical Properties of Tetra(tert-butylphenoxy)phthalocyaninato Zinc(II)

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