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Structural and Photophysical Properties of (Phosphane)gold(I)‐Decorated 4,4′‐Diethynyl‐2,2′‐bipyridine Ligands
Author(s) -
Constable Edwin C.,
Housecroft Catherine E.,
Kocik Marzena K.,
Neuburger Markus,
Schaffner Silvia,
Zampese Jennifer A.
Publication year - 2009
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200900743
Subject(s) - chemistry , nanoclusters , alkyl , bipyridine , aryl , isopropyl , chalcogen , crystallography , polymer chemistry , medicinal chemistry , stereochemistry , photochemistry , crystal structure , organic chemistry
Treatment of 4,4′‐diethynyl‐2,2′‐bipyridine with R 3 PAuCl (R = Ph, 4‐Tol, Et, i Pr) leads to the formation of a family of (phosphane)gold(I)‐decorated 4,4′‐diethynyl‐2,2′‐bipyridine ligands. The solid‐state structures of the compounds are significantly affected by the change from aryl‐ to alkyl‐substituted phosphanes, whereas the progression from ethyl to isopropyl substituents leads to a subtle change in the packing that results in the propagation of two different polymeric chain motifs, both supported by close Au ··· Au contacts [3.1239(1) Å for R = Et, and 3.395(1) Å for R = i Pr]. In CH 2 Cl 2 solution, each of the compounds 1 – 4 is a dual emitter at room temperature. When the excitation wavelength is approximately 238 nm, the emission spectra of 1 and 2 exhibit new bands at 288 and 570 nm at the expense of the original emissions. The photodegradation is not inconsistent with the formation of gold nanoclusters. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)