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Journal of Cluster Science

, Volume 20, Issue 2, pp 365–373 | Cite as

Aqueous to Organic Phase Transfer of Au25 Clusters

  • M. A. Habeeb Muhammed
  • T. Pradeep
Original Paper

Abstract

Aqueous to organic phase transfer of water soluble sub-nanocluster, Au25SG18 (-SG, glutathione thiolate) is demonstrated using the phase transfer reagent, tetraoctylammonium bromide. The phase transfer occurred by the electrostatic attraction between the hydrophilic carboxylate anion of the glutathione ligand on the cluster surface in the aqueous phase and the hydrophobic tetraoctylammonium cation in the toluene phase. Detailed spectroscopic characterization of the phase transferred cluster using optical absorption, photoluminescence and X-ray photoelectron spectroscopy showed that the cluster retains its integrity during the phase transfer. The interaction of the cluster with the phase transfer reagent can be studied with infrared spectroscopy. The phase transferred cluster can be dried and redissolved in an organic medium, just as the original cluster. This is the first report of the phase transfer of a sub-nanocluster, keeping the cluster core intact. The effect of dilution and pH on phase transfer of this cluster is studied in detail. This method promises several possibilities to explore the properties, reactivity and applications of sub-nanoclusters both in the aqueous and organic phases.

Keywords

Gold Nanocluster Phase transfer pH 

Notes

Acknowledgement

We thank the Department of Science and Technology (DST), Government of India for providing constant financial support to our research program on nanomaterials.

References

  1. 1.
    J. Zheng and R. M. Dickson (2002). J. Am. Chem. Soc. 124, 13982.CrossRefGoogle Scholar
  2. 2.
    C. M. Ritchie, K. R. Johnsen, J. R. Kiser, Y. Antoku, R. M. Dickson, and J. T. Petty (2007). J. Phys. Chem. C 111, 175.CrossRefGoogle Scholar
  3. 3.
    A. S. Patel, C. I. Richards, J.-C. Hsiang, and R. M. Dickson (2008). J. Am. Chem. Soc. 130, 11602.CrossRefGoogle Scholar
  4. 4.
    J. Yu, S. A. Patel, and R. M. Dickson (2007). Angew. Chem. Int. Ed. 46, 2028.CrossRefGoogle Scholar
  5. 5.
    J. Zheng, P. R. Nicovich, and R. M. Dickson (2007). Annu. Rev. Phys. Chem. 58, 409.CrossRefGoogle Scholar
  6. 6.
    J. Zheng, J. T. Petty, and R. M. Dickson (2003). J. Am. Chem. Soc. 125, 7780.CrossRefGoogle Scholar
  7. 7.
    J. Zheng, C. W. Zhang, and R. M. Dickson (2004). Phys. Rev. Lett. 93, 077402.CrossRefGoogle Scholar
  8. 8.
    H. Duan and S. Nie (2007). J. Am. Chem. Soc. 129, 2412.CrossRefGoogle Scholar
  9. 9.
    T. G. Schaaff, G. Knight, M. N. Shafigullin, R. F. Borkman, and R. L. Whetten (1998). J. Phys. Chem. B 102, 10643.CrossRefGoogle Scholar
  10. 10.
    Y. Shichibu, Y. Negishi, T. Tsukuda, and T. Teranishi (2005). J. Am. Chem. Soc. 127, 13464.CrossRefGoogle Scholar
  11. 11.
    Y. Shichibu, Y. Negishi, H. Tsunoyama, M. Kanehara, T. Teranishi, and T. Tsukuda (2007). Small 3, 835.CrossRefGoogle Scholar
  12. 12.
    M. A. Habeeb Muhammed and T. Pradeep (2007). Chem. Phys. Lett. 449, 186.CrossRefGoogle Scholar
  13. 13.
    E. S. Shibu, M. A. Habeeb Muhammed, T. Tsukuda, and T. Pradeep (2008). J. Phys. Chem. C 112, 12168.CrossRefGoogle Scholar
  14. 14.
    M. A. Habeeb Muhammed, A. K. Shaw, S. K. Pal, and T. Pradeep (2008). J. Phys. Chem. C 112, 14324.CrossRefGoogle Scholar
  15. 15.
    M. A. Habeeb Muhammed, S. S. Sinha, S. K. Pal, and T. Pradeep (2008). Nanoresearch 1, 333.Google Scholar
  16. 16.
    M. Zhu, E. Lanni, N. Garg, M. E. Bier, and R. Jin (2008). J. Am. Chem. Soc. 130, 1138.CrossRefGoogle Scholar
  17. 17.
    Y. Negishi, K. Nobusada, and T. Tsukuda (2005). J. Am. Chem. Soc. 127, 5261.CrossRefGoogle Scholar
  18. 18.
    M. Brust, M. Walker, D. Bethell, D. J. Schiffrin, and R. J. Whyman (1994). Chem. Commun. 801.Google Scholar
  19. 19.
    K. Vijaya Sarathy, G. U. Kulkarni, and C. N. R. Rao (1997). Chem. Commun. 537.Google Scholar
  20. 20.
    H. Yao, O. Momozawa, T. Hamatani, and K. Kimura (2001). Chem. Mater. 13, 4692.CrossRefGoogle Scholar
  21. 21.
    G.-T. Wei, Z. Yang, C.-Y. Lee, H.-Y. Yang, and C. R. Chris Wang (2004). J. Am. Chem. Soc. 126, 5036.CrossRefGoogle Scholar
  22. 22.
    R. P. Briñas, M. Hu, L. Qian, E. S. Lymar, and J. F. Hainfeld (2008). J. Am. Chem. Soc. 130, 975.CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  1. 1.DST Unit on Nanoscience, Department of Chemistry and Sophisticated Analytical Instruments FacilityIndian Institute of Technology, MadrasChennaiIndia

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