Synthesis, structure and luminescence of new dinuclear cyanido-bridged AgI–AuI one-dimensional coordination polymer

Thesis

2012

Published in: Inorganic Chemistry Communications 20 (2012) 188–190

a,c, Mohamed Ghazzali a,⁎, Mohammed H. Jaafar a, Khalid Al-Farhan a,b, Sebastiaan Akerboom c, Jan Reedijk . 2012

A new alternating chain compound consisting of gold(I) and silver(I) bridged by cyanides is reported. The Ag(I)
ion is functionalized by 2 triphenyl phosphane ligands, resulting in the formula [Au(C`N)2(PPh3)2Ag]n. The
compound has been prepared by room temperature reaction of triphenyl phosphane with the cyanide salts of
silver(I) and gold(I). The product has been characterized and its single crystal X-ray structure was determined.
In the molecular structure of the complex, the Au(I) centers exhibit the expected linear, two-coordinate geometry
with C-bound cyanides, whereas the Ag(I) centers adopt a tetrahedral geometry in a AgN2P2 chromophore.
The shortest hetero intermetallic separation distance is 4.94(7) Å. No aurophilic interactions are observed, but
only the non-conventional C\H…Au hydrogen interactions are present. Upon excitation at 325 nm, a quite
intense luminescence at 475 nm, assigned on the basis of DFT calculations toMMLCT, is observed,which amounts
to ca. 10% of the luminescence intensity of the best known luminescent compounds.

• Publication Work Type: paper