Fluorescence studies of quantum dots and zinc tetraamino phthalocyanine conjugates

Britton, J. and Antunes, Edith Martins and Nyokong, T. (2009) Fluorescence studies of quantum dots and zinc tetraamino phthalocyanine conjugates. Inorganic Chemistry Communications, 21 (9). pp. 828-831. ISSN 1387-7003

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Official URL: http://dx.doi.org/10.1016/j.inoche.2009.06.028

Abstract

CdTe Qds capped with mercapto propionic acid (MPA) were covalently linked to zinc tetraamino phthalocyanine (ZnTAPc) 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 the formation of an amide bond between ZnTAPc and CdTe QDs. Both the linked ZnTAPc–QD complexes and a mixture of QDs and ZnTAPc (i.e. without chemical linking) showed Förster resonance energy transfer (FRET). ZnTAPc quenched the QDs emission, giving quenching constants in the order of 103 M−1.

Item Type:Article
Uncontrolled Keywords:Energy transfer; Fluorescence quenching; Quantum dots; Zinc tetraamino phthalocyanine
Subjects:Y Unknown > Subjects to be assigned
Divisions:Faculty > Faculty of Science > Chemistry
ID Code:1509
Deposited By: Mrs Eileen Shepherd
Deposited On:15 Oct 2009
Last Modified:02 Aug 2012 07:47
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