Synthesis, photophysical and photochemical properties of tetra- and octa-substituted gallium and indium phthalocyanines
Synthesis, photophysical and photochemical properties of tetra- and octa-substituted gallium and indium phthalocyanines
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DOI：
10.1016/j.poly.2007.03.007
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发表时间：
2007-08-06
期刊：
影响因子：
2.6
通讯作者：
Nyokong, Tebello
中科院分区：
文献类型：
--
作者：
Durmus, Mahmut;Nyokong, Tebello
本文首次报道了四-和八-[4-（苯氧基苯氧基）]取代镓(i)和铟（III）酞菁的合成及其光物理和光化学性质。通过元素分析、红外光谱、核磁共振氢谱和电子能谱对新化合物进行了表征。描述了这些化合物在二甲基亚砜（DMSO）中的光降解量子产率、荧光量子产率和寿命、三态寿命和三态量子产率以及单线态氧量子产率的一般趋势。取代的酞菁铟配合物（7b-9b）具有更高的三态量子产率和更短的三态寿命。与取代的GaPc衍生物相比，前者由于增强了系统间交叉（ISC）。在激光照射下，镓和铟酞菁配合物由于环还原而发生光转化。单线态氧量子产率（Phi(Delta)）表明了该配合物在需要单线态氧（11型机制）的应用中作为光敏剂的潜力，其范围为0.51至0.94。因此，这些复合物具有光动力治疗癌症的潜力。(c) 2007 Elsevier Ltd.版权所有。
The synthesis, photophysical and photochemical properties of the tetra- and octa-[4-(benzyloxyphenoxy)] substituted gallium(Ill) and indium(III) phthalocyanines are reported for the first time. The new compounds have been characterized by elemental analysis, IR, H-1 NMR spectroscopy and electronic spectroscopy. General trends are described for quantum yields of photodegredation, fluorescence quantum yields and lifetimes, triplet lifetimes and triplet quantum yields as well as singlet oxygen quantum yields of these compounds in dimethylsulfoxide (DMSO). Substituted indium phthalocyanine complexes (7b-9b) showed much higher quantum yields of triplet state and shorter triplet lifetimes. compared to the substituted GaPc derivatives due to enhanced intersystem crossing (ISC) in the former. The gallium and indium phthalocyanine complexes showed phototransformation during laser irradiation due to ring reduction. The singlet oxygen quantum yields (Phi(Delta)), which give an indication of the potential of the complexes as photo sensitizers in applications where singlet oxygen is required (Type 11 mechanism) ranged from 0.51 to 0.94. Thus, these complexes show potential as photodynamic therapy of cancer. (c) 2007 Elsevier Ltd. All rights reserved.