Issue 14, 2012

Near infrared luminescence of gold nanoclusters affected by the bonding of 1,4-dithiolate durene and monothiolate phenylethanethiolate

Abstract

The impacts of Au–thiolate bonding on the near infrared (IR) luminescence of Au nanoclusters are studied by designing two types of monolayer reactions. Firstly, 1,4-dithiol durene (durene-DT) is reacted with Au25 monolayer protected clusters (MPCs) stabilized by phenylethanethiolate (PhC2S) ligands. Upon the addition of durene-DT, the near IR luminescence of Au MPCs intensifies while the well-defined absorbance bands diminish. The optical transition is associated with the ligand exchange process monitored by proton NMR. In the second approach, PhC2S monothiols are reacted with durene-DT stabilized Au nanoclusters (DTCs). The addition of PhC2S to the Au DTCs induces the gradual decrease of the near IR luminescence. Mass spectrometry and NMR analysis reveal similar final products of mixed thiolate Au nanoclusters from both reactions. The results suggest that the 1,4-dithiolate–Au bonding interaction is a promising factor to further enhance the near IR luminescence of Au nanoclusters for biomedical applications.

Graphical abstract: Near infrared luminescence of gold nanoclusters affected by the bonding of 1,4-dithiolate durene and monothiolate phenylethanethiolate

Article information

Article type
Paper
Submitted
01 Mar 2012
Accepted
01 May 2012
First published
30 May 2012

Nanoscale, 2012,4, 4119-4124

Near infrared luminescence of gold nanoclusters affected by the bonding of 1,4-dithiolate durene and monothiolate phenylethanethiolate

Z. Tang, T. Ahuja, S. Wang and G. Wang, Nanoscale, 2012, 4, 4119 DOI: 10.1039/C2NR30504F

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