Issue 11, 2017

Penicillamine-protected Ag20 nanoclusters and fluorescence chemosensing for trace detection of copper ions

Abstract

We report the synthesis of penicillamine-protected Ag20 nanoclusters (NCs), with properties of high monodispersity, red fluorescence and water solubility. Full characterization of the Ag20 NCs is addressed, along with first-principles optimization calculations, revealing the chemical composition and structure of the as-prepared Ag NCs within a molecular formula [Ag20(DPA)18-H]. Moreover, natural bond orbital (NBO) analysis demonstrates the charge-transfer interactions between the ligand and Ag atoms, and helps in understanding the origins of fluorescence of Ag20 NCs related to the ligand-to-metal charge transfer (LMCT) mechanism. Further, fluorescence chemosensing of the Ag20 NCs is demonstrated for tracing copper ions with high sensitivity and selectivity in aqueous solution.

Graphical abstract: Penicillamine-protected Ag20 nanoclusters and fluorescence chemosensing for trace detection of copper ions

Supplementary files

Article information

Article type
Paper
Submitted
21 Dec 2016
Accepted
21 Feb 2017
First published
23 Feb 2017

Nanoscale, 2017,9, 3986-3994

Penicillamine-protected Ag20 nanoclusters and fluorescence chemosensing for trace detection of copper ions

X. Liu, W. Ding, Y. Wu, C. Zeng, Z. Luo and H. Fu, Nanoscale, 2017, 9, 3986 DOI: 10.1039/C6NR09818E

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