Fluorescence quenching and energy transfer in conjugates of quantum dots with zinc and indium tetraamino phthalocyanines

被引：47

作者：

Britton, Jonathan ^{[1
]}

Antunes, Edith ^{[1
]}

Nyokong, Tebello ^{[1
]}

机构：

[1] Rhodes Univ, Dept Chem, ZA-6140 Grahamstown, South Africa

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2010年 / 210卷 / 01期

基金：

新加坡国家研究基金会;

关键词：

Zinc indium tetraaminophthalocyanine; Energy transfer; Fluorescence quenching; Quantum dots; CDTE NANOCRYSTALS; CDSE; PHOTOLUMINESCENCE; PHOTOSENSITIZERS; YIELDS;

D O I：

10.1016/j.jphotochem.2009.12.013

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

CdTe QDs capped with mercapto propionic acid (MPA) and thioglycolic acid (TGA) were covalently linked to zinc and indium tetraaminophthalocyanines (TAPcs) using N-ethyl-N(3-dimethylaminopropyl) carbodiimide (EDC) and N-hydroxy succinimide (NHS) as the coupling agents. The results presented give evidence in favour of formation of an amide bond between the MTAPc and CdTe QDs. Both the linked ZnTAPc-QD complexes and the mixture of QDs and ZnTAPc (without chemical linking) showed Forster resonance energy transfer (FRET), whereas the QD interactions with InTAPc yielded no evidence of FRET. Both MTAPcs quenched the QDs emission, with quenching constants of the order of 10(3)-10(4) M-1. High energy transfer efficiencies were obtained in some cases (as high as 93%), due to the low donor to acceptor distances. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：1 / 7

页数：7

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