Characterization and photophysical behavior of phthalocyanines when grafted onto silica nanoparticles

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• 作者：Adedayo Fashina ; Edith Antunes ; Tebello Nyokong ; ^{t.nyokong@ru.ac.za}
• 关键词：Phthalocyanine ; Silica nanoparticles ; Triplet quantum yields ; Fluorescence quantum yield ; Carboxyl phenoxy
• 刊名：Polyhedron
• 出版年：2013
• 出版时间：10 April, 2013
• 年：2013
• 卷：53
• 期：Complete
• 页码：278-285
• 全文大小：2580 K

文摘

This work reports on the functionalization of silica nanoparticles with zinc phthalocyanine complexes tetra-substituted non-peripherally with 4-carboxyphenoxyl and 3-carboxyphenoxyl groups. The phthalocyanine dyes have a free carboxyl group, facilitating the covalent attachment of the dyes on the silica surface via amide bond formation. The phthalocyanine functionalized silica nanoparticles showed higher fluorescence and triplet quantum yields as well as longer triplet lifetimes compared to the free phthalocyanines.