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Proceedings Paper

The effect of metal ions on the photophysical and photochemical property of phenylthio bromo metal phthalocyanines
Author(s): Sujuan Pan; Pingping Shen; Dongdong Ma; Yuhua Wang; Tiantian Zhang; Kuizhi Chen; Hongqin Yang; Shusen Xie; Yiru Peng
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Paper Abstract

Phthalocyanines have attracted great attention because of their applications in material science including electro-optical devices, electrochromic display, and photodynamic therapy (PDT) of cancer. In addition, the Pcs exhibit great flexibility of chemical structure modification enabled by either peripheral substituents or metal ions co-ordination to central cavity of highly conjugated tetrapyrrolic macrocycles. However, because of the hydrophobic nature of the phthalocyanine ring, Pcs have strong tendency to aggregate in solution, which limited their applications. To overcome this problem, the introduction of dendritic wedge to peripheral positions of phthalocyanines can prevent the formation of aggregation to some extent. The preparation procedure involved the modification of the zinc (II) and magnesium (II) phthalocyanines with peripherally dendritic substitutions. The photophysical and photochemical properties of dendritic phthalocyanines were studied by UV/Vis and fluorescence spectroscopic methods. Compared with the magnesium (II) phthalocyanine, the intensity of Q band of zinc (II) phthalocyanine was increased but no obviously position changes was observed. Furthermore, the zinc (II) phthalocyanine exhibited relatively higher fluorescence intensity than the magnesium (II) phthalocyanine. The fluorescence quantum yield and lifetimes of magnesium (II) phthalocyanine was clearly longer than that of zinc (II) phthalocyanine. As the better photosensitizer, the zinc (II) phthalocyanine has higher singlet oxygen quantum yield owning superior performance. This results indicated that the singlet oxygen quantum yield would be effected by the nature of metal ions.

Paper Details

Date Published: 31 October 2016
PDF: 8 pages
Proc. SPIE 10024, Optics in Health Care and Biomedical Optics VII, 100243J (31 October 2016); doi: 10.1117/12.2246161
Show Author Affiliations
Sujuan Pan, Fujian Normal Univ. (China)
Pingping Shen, Fujian Normal Univ. (China)
Dongdong Ma, Fujian Normal Univ. (China)
Yuhua Wang, Fujian Normal Univ. (China)
Tiantian Zhang, Fujian Normal Univ. (China)
Kuizhi Chen, Fujian Normal Univ. (China)
Hongqin Yang, Fujian Normal Univ. (China)
Shusen Xie, Fujian Normal Univ. (China)
Yiru Peng, Fujian Normal Univ. (China)

Published in SPIE Proceedings Vol. 10024:
Optics in Health Care and Biomedical Optics VII
Qingming Luo; Xingde Li; Ying Gu; Yuguo Tang, Editor(s)

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