Influence of cyclodextrins on the fluorescence, photostability and singlet oxygen quantum yields of zinc phthalocyanine and naphthalocyanine complexes

被引：48
|
作者：
Tau, P [1 ]
Ogunsipe, AO [1 ]
Maree, S [1 ]
Maree, MD [1 ]
Nyokong, T [1 ]
机构：
[1] Rhodes Univ, Dept Chem, ZA-6140 Grahamstown, South Africa
来源：
JOURNAL OF PORPHYRINS AND PHTHALOCYANINES | 2003年 / 7卷 / 06期
关键词：
zinc phthalocyanine; cyclodextrin; singlet oxygen; photobleaching; fluorescence;
D O I：
10.1142/S1088424603000562
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The effects of formation of cyclodextrin inclusion complexes on the photochemical and photophysical properties of zinc phthalocyanine (ZnPc) and various peripherally substituted zinc phthalocyanines as well as zinc naphthalocyanine (ZnNPc) are investigated. The cyclodextrins employed were the hydroxypropyl-gamma-cyclodextrin and unsubstituted beta-cyclodextrin. Job's plots were employed to confirm the stoichiometry of the inclusion complexes and showed 2:1 and 4:1 (cyclodextrin:phthalocyanine) inclusion behavior. The phthalocyanine inclusion complexes showed larger singlet oxygen quantum yield (phi(Delta)) values when compared to the free phthalocyanines before inclusion, for complexes 1 (zinc naphthalocyanine), 2 (zinc tetranitrophthalocyanine) and 4 (zinc tetra-tert-butylphenoxyphthalocyanine). The fluorescence quantum yields generally remained unchanged following inclusion. Copyright (C) 2003 Society of Porphyrins & Phthalocyanines.
引用
收藏
页码：439 / 446
页数：8
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