Unsymmetrically Substituted Nickel Triazatetra-Benzcorrole and Phthalocynanine Complexes: Conjugation to Quantum Dots and Applications as Fluorescent "Turn ON" Sensors

被引：11

作者：

Adegoke, Oluwasesan ^{[1
]}

Nyokong, Tebello ^{[1
]}

机构：

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

来源：

JOURNAL OF FLUORESCENCE | 2014年 / 24卷 / 02期

基金：

新加坡国家研究基金会;

关键词：

Phthalocyanine; Triazatetra-benzcorrole; Fluorescence enhancement; Quantum dots; Mercury; TETRAAMINO-PHTHALOCYANINE CHARACTERIZATION; METAL-IONS; CDTE; CDSE; NANOCRYSTALS; AGGREGATION; RECOGNITION; PROBE;

D O I：

10.1007/s10895-013-1317-4

中图分类号：

Q5 [生物化学];

学科分类号：

070307 [化学生物学];

摘要：

We report on the design and application of fluorescent nanoprobes based on the covalent linking of (L)-glutathione-capped CdSe@ZnS quantum dots (QDs) to newly synthesized unsymmetrically substituted nickel mercaptosuccinic acid triazatetra-benzcorrole (3) and phthalocyanine (4) complexes. Fluorescence quenching of the QDs occurred on conjugation to complexes 3 or 4. The nanoprobes were selectively screened in the presence of different cations and Hg2+ showed excellent affinity in "turning ON" the fluorescence of the nanoprobes. Experimental results showed that the sensitivity of QDs-4 towards Hg2+ was much higher than that of QDs-3 nanoprobe. The mechanism of reaction has been elucidated based on the ability of Hg2+ to coordinate with the sulphur atom of the Ni complex ring and apparently "turn ON" the fluorescence of the linked QDs.

引用

页码：481 / 491

页数：11

共 37 条

[1]

Fluorescence "Switch on" of Conjugates of CdTe@ZnS Quantum Dots with Al, Ni and Zn Tetraamino-Phthalocyanines by Hydrogen Peroxide: Characterization and Applications as Luminescent Nanosensors [J].