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Issue 55, 2014
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Multidentate polymers stabilized water-dispersed copper nanoclusters: facile photoreduction synthesis and selective fluorescence turn-on response

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Abstract

Using bifunctional thiol-based multidentate polymers {poly(acrylic acid)-graft-mercaptoethylamine} as stabilizers and CuCl2 as the precursor, water-dispersed copper nanoclusters (CuNCs) were prepared by a facile photoreduction method. Upon UV irradiation (365 nm, 8 W) for 0–180 min, the appearance and evolution of fluorescence emission spectra were observed. The prepared CuNCs exhibited bright red-emitting fluorescence (located at ∼600 nm) and ultrasmall particle sizes (∼0.8 nm). Different synthesis conditions (irradiation time, pH and [Cu2+]/[–COOH]) were involved to evaluate corresponding effects on spectra of CuNCs. Moreover, experimental results indicated chelating reagents treated CuNCs showed selective fluorescence turn-on responses to Cu2+, compared with other metal ions, exhibiting promising use as a novel CuNCs-based “OFF–ON” fluorescence probe of Cu2+.

Graphical abstract: Multidentate polymers stabilized water-dispersed copper nanoclusters: facile photoreduction synthesis and selective fluorescence turn-on response

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Supplementary files

Article information


Submitted
20 Apr 2014
Accepted
16 Jun 2014
First published
16 Jun 2014

RSC Adv., 2014,4, 29083-29088
Article type
Paper

Multidentate polymers stabilized water-dispersed copper nanoclusters: facile photoreduction synthesis and selective fluorescence turn-on response

R. Gui, J. Sun, X. Cao, Y. Wang and H. Jin, RSC Adv., 2014, 4, 29083
DOI: 10.1039/C4RA03606A

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