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Bromide ion binding by a dinuclear gold(i) N-heterocyclic carbene complex: a spectrofluorescence and X-ray absorption spectroscopic study.
MedLine Citation:
PMID:  23138339     Owner:  NLM     Status:  Publisher    
Fluorescence and X-ray absorption spectroscopy were used to investigate the anion binding properties of a luminescent, dinuclear Au(i) N-heterocyclic carbene (NHC) complex ([](2+)) with a short Au(i)Au(i) contact. The addition of Br(-) ions to a DMSO solution of [](PF(6))(2) caused a red-shift in the fluorescence emission band from 396 nm to 496 nm. Similarly, the addition of Br(-) ions to [](PF(6))(2) caused a decrease in the energy of the Au L(3)-edge in the X-ray absorption spectrum, consistent with the formation of an association complex between the cation [](2+) and Br(-) ions. Solution-based structural studies of the association complex were carried out using extended X-ray absorption fine structure (EXAFS) modelling of the Au(i)Au(i) core of the cation. These studies indicate that the association complex results from Au(i)Br(-) interactions, with the Br(-) ions occupying two partially occupied sites at ∼2.9 and 3.9 Å from the Au(i) atoms.
Louise E Wedlock; Jade B Aitken; Susan J Berners-Price; Peter J Barnard
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-9
Journal Detail:
Title:  Dalton transactions (Cambridge, England : 2003)     Volume:  -     ISSN:  1477-9234     ISO Abbreviation:  Dalton Trans     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-9     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101176026     Medline TA:  Dalton Trans     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Institute for Glycomics, Griffith University, Gold Coast Campus, QLD 4222, Australia.
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