Solvation chemistry of water-soluble thiol-protected gold nanocluster Au₁₀₂ from DOSY NMR spectroscopy and DFT calculations

Kirsi Salorinne; Tanja Lahtinen; Sami Malola; Jaakko Koivisto; Hannu Häkkinen

doi:10.1039/c4nr01255k

Solvation chemistry of water-soluble thiol-protected gold nanocluster Au₁₀₂ from DOSY NMR spectroscopy and DFT calculations

Nanoscale. 2014 Jul 21;6(14):7823-6. doi: 10.1039/c4nr01255k.

Authors

Kirsi Salorinne¹, Tanja Lahtinen, Sami Malola, Jaakko Koivisto, Hannu Häkkinen

Affiliation

¹ Department of Chemistry, Nanoscience Center, University of Jyväskylä, P.O. Box 35, 40014 Jyväskylä, Finland. [email protected].

PMID: 24910110
DOI: 10.1039/c4nr01255k

Abstract

The hydrodynamic diameter of Aum(pMBA)n [(m, n) = (102, 44) and (144, 60)] clusters in aqueous media was determined via DOSY NMR spectroscopy. The apparent size of the same (n, m) cluster depends on the counter ion of the deprotonated pMBA(-) ligand as explained by the competing ion-pair strength and hydrogen bonding interactions studied in DFT calculations. The choice of the counter ion affects the surface chemistry and molecular structure at the organic/water interface, which is relevant for biological applications.

Publication types

Research Support, Non-U.S. Gov't