Hostname: page-component-76fb5796d-skm99 Total loading time: 0 Render date: 2024-04-26T11:42:39.061Z Has data issue: false hasContentIssue false
  • English
  • Français

Chiral Ligand-Protected Bimetallic Nanoclusters: How does the Metal Core Configuration Influence the Nanocluster’s Chiroptical Responses?

Published online by Cambridge University Press:  30 April 2015

Hiroshi Yao
Hiroshi Yao*
Affiliation:
Graduate School of Material Science, University of Hyogo, 3-2-1 Koto, Kamigori-cho, Ako-gun, Hyogo 678-1297, Japan
Get access

Abstract

We here present electronic structures and chiroptical responses of gold-based bimetallic nanoclusters protected by chiral thiolate ligand, glutathione (GSH), and compare them with those of monometallic counterparts. The nanoclusters examined are AuPd and AuAg bimetallic systems. The effect of Pd or Ag doping on the chiroptical responses of optically active Au nanoclusters as well as the importance of the bimetallic core configurations are discussed. Briefly, we find that GS-protected AuPd or AuAg nanoclusters exhibit quite different Cotton effects from those of the monometallic nanoclusters in metal-based electronic transition regions. In the AuPd system, all bimetallic nanoclusters exhibit featureless absorption profiles, but their circular dichroism (CD) signals are structured, offering a greater advantage in detecting a foreign atom doping in the nanocluster system. In the AuAg system, the nanocluster compounds exhibit relatively weaker CD responses than those of the corresponding Au compounds. This CD decrease can be explained in terms of the increased geometrical isomers that are formed by statistical distribution of Ag heteroatoms in the nanocluster, since an increased number of possible configurations gives an average in the CD response with positive and negative bands of different optical isomers.

Keywords

nanostructureAuelectronic structure
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1802: Symposium PP – Gold-Based Materials and Applications , 2015 , pp. 1 - 12
Copyright
Copyright © Materials Research Society 2015 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Ferrando, R., Jellinek, J. and Johnston, R. L., Chem. Rev. 108, 845 (2008).CrossRefGoogle Scholar
Toshima, N., Harada, M., Yamazaki, Y. and Asakura, K., J. Phys. Chem. 96, 9927 (1992).CrossRefGoogle Scholar
Link, S., Wang, Z. L., El-Sayed, M. A., J. Phys. Chem. B 103, 3529 (1999).CrossRefGoogle Scholar
Häkkinen, H., Nature Chem. 4, 443 (2012).CrossRefGoogle Scholar
Negishi, Y., Kurashige, W., Niihori, Y., Iwasa, T., Nobusada, K., Phys. Chem. Chem. Phys. 12, 6219 (2010).CrossRefGoogle Scholar
Guidez, E. B., Mäkinen, V., Häkkinen, H., Aikens, C. M., J. Phys. Chem. C 116, 20617 (2012).CrossRefGoogle Scholar
Yao, H., Kobayashi, R., J. Colloid Interface Sci. 419, 1 (2014).CrossRefGoogle Scholar
Kobayashi, R., Nonoguchi, Y., Sasaki, A., Yao, H., J. Phys. Chem. C 118, 15506 (2014).CrossRefGoogle Scholar
Yao, H., Miki, K., Nishida, N., Sasaki, A., Kimura, K., J. Am. Chem. Soc. 127, 15536 (2005).CrossRefGoogle Scholar
Fields-Zinna, C. A., Crowe, M. C., Dass, A., Weaver, J. F. E., Murray, R. W., Langmuir 25, 7704 (2009).CrossRefGoogle Scholar
Negishi, Y., Takasugi, Y., Sato, S., Yao, H., Kimura, K., Tsukuda, T., J. Am. Chem. Soc. 126, 6518 (2004).CrossRefGoogle Scholar
Kauffman, D. R., Alfonso, D., Matranga, C., Qian, H., Jin, R., J. Phys. Chem. C 117, 7914 (2013).CrossRefGoogle Scholar
Matsuoka, N., Hidaka, J., Shimura, Y., Inorg. Chem. 9, 719 (1970).CrossRefGoogle Scholar