NDLI: Bromide ion binding by a dinuclear gold(I) N-heterocyclic carbene complex: a spectrofluorescence and X-ray absorption spectroscopic study

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Wedlock, Louise E. Aitken, Jade B. Barnard, Peter J. Berners-price, Susan J.
Description	Author Affiliation: Wedlock LE ( Institute for Glycomics, Griffith University, Gold Coast Campus, QLD 4222, Australia.)
Abstract	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 $([1]^{2+})$ with a short Au(I)⋯Au(I) contact. The addition of $Br^{−}$ ions to a DMSO solution of $[1](PF_{6})_{2}$ caused a red-shift in the fluorescence emission band from 396 nm to 496 nm. Similarly, the addition of $Br^{−}$ ions to $[1](PF_{6})_{2}$ 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 $[1]^{2+}$ 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.
ISSN	14779226
Issue Number	4
Volume Number	42
e-ISSN	13645447
Journal	Dalton Trans.
Language	English
Publisher	Royal Society of Chemistry
Publisher Date	2013-01-28
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Bromides Chemistry Coordination Complexes Gold Methane Analogs & Derivatives Chemical Synthesis Ions X-Ray Absorption Spectroscopy Journal Article Research Support, Non-U.S. Gov't
Content Type	Text
Resource Type	Article
Subject	Inorganic Chemistry

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