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Issue 20, 2013
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On the flexibility of the gold–thiolate interface: racemization of the Au40(SR)24 cluster

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Abstract

The two enantiomers of the Au40(2-PET)24 cluster were collected using HPLC and analyzed by MALDI-TOF mass spectrometry, UV-vis- and CD-spectroscopy. The flexibility of the cluster surface allows racemization of the intrinsically chiral cluster at elevated temperatures (80–130 °C) which was monitored following the optical activity. The determined activation energy (25 kcal mol−1) lies in the range of previously reported values for Au38 nanoclusters whereas the activation entropy deviates significantly from the one in Au38. The latter may indicate that the racemization can take place via different mechanisms.

Graphical abstract: On the flexibility of the gold–thiolate interface: racemization of the Au40(SR)24 cluster

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Publication details

The article was received on 02 Jul 2013, accepted on 06 Aug 2013 and first published on 08 Aug 2013


Article type: Communication
DOI: 10.1039/C3NR03389A
Citation: Nanoscale, 2013,5, 9568-9571

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    On the flexibility of the gold–thiolate interface: racemization of the Au40(SR)24 cluster

    B. Varnholt, I. Dolamic, S. Knoppe and T. Bürgi, Nanoscale, 2013, 5, 9568
    DOI: 10.1039/C3NR03389A

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