A copper cluster protected with phenylethanethiol
A copper cluster protected with 2-phenylethanethiol (PET) exhibiting distinct optical features in UV/Vis spectroscopy is reported. Matrix-assisted laser desorption ionisation mass spectrometry of the cluster shows a well-defined molecular ion peak at m/z 5,800, assigned to ~Cu38(PET)25. Fragmented ions from the cluster show the expected isotope patterns in electrospray ionisation mass spectrometry. The as-synthesized cluster was well-characterised using other tools as well. Clusters undergo decomposition in about 2 h after synthesis as a metallic few-atom core of copper is highly unstable. The products of decomposition were also characterised.
KeywordsAtomically precise Cu cluster 2-Phenylethanethiol MALDI MS ESI MS
We thank the Department of Science and Technology, Government of India for financial support. Thanks are due to SAIF, IIT Madras for the PXRD data.
- Chakraborty I, Govindarajan A, Erusappan J, Ghosh A, Pradeep T, Yoon B, Whetten RL, Landman U (2012a) The superstable 25 kDa monolayer protected silver nanoparticle: measurements and interpretation as an icosahedral Ag152(SCH2CH2Ph)60 cluster. Nano Lett 12(11):5861–5866. doi: 10.1021/nl303220x CrossRefGoogle Scholar