Rapid Phosphine Exchange on 1.5-nm Gold Nanoparticles

Autor:	Carol Creutz, Mei H. Chou, Janet M. Petroski
Rok vydání:	2004
Předmět:	Chemistry Stereochemistry Ligand Phosphorus Resonance chemistry.chemical_element Photochemistry Inorganic Chemistry Solvent chemistry.chemical_compound Colloidal gold Proton NMR Physical and Theoretical Chemistry Phosphine Dichloromethane
Zdroj:	Inorganic Chemistry. 43:1597-1599
ISSN:	1520-510X 0020-1669
DOI:	10.1021/ic035304b
Popis:	Triphenylphosphine-cappped, 1.5-nm gold nanoparticles "Au(101)(PPh(3))(21)Cl(5)" prepared following Hutchison's procedure (Weare, W. W.; Reed, S. M.; Warner, M. G.; Hutchison, J. E. J. Am. Chem. Soc. 2000, 122, 12890) undergo rapid exchange of capping ligand phosphine with dissociated and added phosphine in dichloromethane solvent at 298 K. Remarkably, while the (1)H NMR spectrum resonances of the attached phosphine are broad, characteristic of a range of incompletely averaged environments, the (31)P NMR spectrum (observable only at 213 K and below) exhibits a single, narrow resonance indicating that all of the phosphorus atoms are magnetically equivalent.
Databáze:	OpenAIRE
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