Spontaneous charge transfer between zinc tetramethyl-tetra-2,3-pyridinoporphyrazine and CdTe and ZnS quantum dots

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• 作者：Sharon Moeno ; Mopelola Idowu ; Tebello Nyokong
• 关键词：Quantum dots ; Zinc pyridino porphyrazine ; Charge transfer ; Cyclic voltammetry ; Mercaptoethanol ; Thioglycolic acid ; Cadmium telleride ; Zinc sulfide
• 刊名：Inorganica Chimica Acta
• 出版年：2008
• 期刊代码：40_00201693
• 类别：ch
• 出版时间：27 June 2008
• 卷：361
• 期：9-10
• 页码：2950-2956
• 文件大小：370 K

摘要

Zinc tetramethyl-tetra-2,3-pyridinoporphyrazine (ZnTmtppa(-2)) gets reduced to the ZnTmtppa(-3) species on interaction with CdTe QDs capped with 2-mercaptoethanol (2-ME) or thioglycolic acid (TGA) and ZnS QDs capped with 2-ME. The interaction occurs without photolysis. The fluorescence of the QDs is quenched by ZnTmtppa resulting in large quenching constants. Binding of ZnTmtppa to QDs occurs with two molecules of the former binding to the latter.