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Issue 1, 2009
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Synthesis of highly luminescent cobalt(ii)-bis(8-hydroxyquinoline)nanosheets as isomeric aromatic amine probes

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Abstract

Highly luminescent and water-soluble cobalt(II)-bis(8-hydroxyquinoline) (CoQ2) nanosheets have been successfully synthesized via a simple, rapid sonochemical method. The water-soluble CoQ2nanosheets were characterized by luminescence spectroscopy, UV–vis spectroscopy, FT-IR spectroscopy and transmission electron microscopy (TEM). The CoQ2nanosheets allow highly sensitive and selective determination of p-nitroanilinevia fluorescence quenching. Under optimal conditions, the relative fluorescence intensities of nanosheets decreased linearly with increasing p-nitroaniline. However, the sensitivity of CoQ2nanosheets toward other aromatic amines including o-diaminobenzene, m-diaminobenzene, p-diaminobenzene, p-toluidine, o-nitroaniline, m-nitroaniline, p-chloroaniline and aniline is negligible. It is found that p-nitroaniline can quench the luminescence of CoQ2nanosheets in a concentration-dependent manner that is best described by a Stern–Volmer-type equation. The possible underlying mechanism is discussed.

Graphical abstract: Synthesis of highly luminescent cobalt(ii)-bis(8-hydroxyquinoline)nanosheets as isomeric aromatic amine probes

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Supplementary files

Article information


Submitted
14 Apr 2009
Accepted
12 Jul 2009
First published
28 Aug 2009

Nanoscale, 2009,1, 128-132
Article type
Paper

Synthesis of highly luminescent cobalt(II)-bis(8-hydroxyquinoline)nanosheets as isomeric aromatic amine probes

H. Li and Y. Li, Nanoscale, 2009, 1, 128
DOI: 10.1039/B9NR00019D

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