Synthesis and photophysical properties of peripherally and non-peripherally mercaptopyridine substituted metal free, Mg(II) and Al(III) phthalocyanines

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• 作者：Yasin Arslano臒lu^a ; ^b ; Mopelola Idowu^a ; ^c ; Tebello Nyokong^a ; ^{t.nyokong@ru.ac.za}
• 关键词：Metallophthalocyanine ; 2-mercaptopyridine ; Triplet quantum yield ; Fluorescence lifetime
• 刊名：Spectrochimica Acta Part A ; Molecular and Biomolecular Spectroscopy
• 出版年：2012
• 期刊代码：99_13861425
• 类别：ch
• 出版时间：September, 2012
• 卷：95
• 期：Complete
• 页码：407-413
• 文件大小：1003 K

摘要

The syntheses and photophysical properties of metallophthalocyanines containing Mg²⁺ and Al³⁺ as central metal ions and their unmetallated derivative (complexes 3-8) tetra- substituted at the non-peripheral (伪) and peripheral (尾) positions with 2-mercaptopyridine are reported. The trends in triplet and fluorescence quantum yields are described for these compounds. The complexes exhibited relatively high triplet quantum yields (桅_T) ranging from 0.33 to 0.54 and fluorescence quantum yields (桅_F) ranging from 0.02 to 0.29. Triplet state lifetimes of the complexes were long ranging from 120 to 460 渭s, indicating a potential use of these complexes as photosensitizers.