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Issue 14, 2012
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A photoresponsive Au25 nanocluster protected by azobenzene derivative thiolates

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Abstract

An Au25 cluster protected by azobenzene derivative thiolates (S–Az) ([Au25(S–Az)18]) was synthesized with the aim of producing a photoresponsive Au25 cluster. The matrix-assisted laser desorption/ionization mass spectrum of the product revealed that [Au25(S–Az)18] was synthesized in high purity. Optical absorption spectra of [Au25(S–Az)18] obtained before and after photoirradiation suggest that the azobenzenes in the ligands of Au25(S–Az)18 isomerize with an efficiency of nearly 100%, both from the trans to cis conformation and from the cis to trans conformation. Furthermore, the redox potential and optical absorption of Au25(S–Az)18 were found to change reversibly due to photoisomerization of azobenzenes.

Graphical abstract: A photoresponsive Au25 nanocluster protected by azobenzene derivative thiolates

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Publication details

The article was received on 06 Apr 2012, accepted on 10 May 2012 and first published on 15 May 2012


Article type: Paper
DOI: 10.1039/C2NR30830D
Citation: Nanoscale, 2012,4, 4263-4268

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    A photoresponsive Au25 nanocluster protected by azobenzene derivative thiolates

    Y. Negishi, U. Kamimura, M. Ide and M. Hirayama, Nanoscale, 2012, 4, 4263
    DOI: 10.1039/C2NR30830D

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