Nanoconjugates of CdTe@ZnS quantum dots with cobalt tetraamino-phthalocyanine: Characterization and implications for the fluorescence recognition of superoxide anion

被引：21

作者：

Adegoke, Oluwasesan ^{[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 | 2013年 / 257卷

基金：

新加坡国家研究基金会;

关键词：

Superoxide anion; Cobalt tetraamino-phthalocyanines; Quantum dots; Fluorescence; THIOL-CAPPED CDTE; CADMIUM SELENIDE; DISMUTASE; OXYGEN; FILMS; FRET; METALLOPORPHYRINS; NANOCRYSTALS; GENERATION; BIOSENSOR;

D O I：

10.1016/j.jphotochem.2013.02.010

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

The covalent linking of thiol-capped CdTe@ZnS QDs with cobalt tetraamino-phthalocyanine (CoTAPc) has been successfully carried out. Several techniques such as time-resolved fluorescence measurements, thermal gravimetric analysis, transmission electron microscopy and spectrophotometric techniques were employed to characterize the nanoconjugates. Covalent binding of the QDs with CoTAPc resulted in the fluorescence quenching of the former. In the presence of varying concentrations of superoxide anion (O-2(center dot-)), the fluorescence of the QDs in the conjugate was gradually enhanced and the detection limits obtained were 2.1 and 2.4 nM for the smaller and larger QDs, respectively. Based on the excellent selectivity displayed by the nanoconjugates towards O-2(center dot-) over other biologically active species, a potential nanosensor was developed. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：11 / 19

页数：9

共 63 条

[1]

SYNTHESIS AND STRUCTURAL STUDIES OF METAL(II) 4,9,16,23-PHTHALOCYANINE TETRAAMINES [J].