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DOI: 10.1039/A904078A (Paper) Reference Section for: J. Mater. Chem., 1999, 9, 2327-2332

Liquid crystals based on pseudohalogold(I) isocyanide complexes

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Mohamed Benouazzane, Silverio Coco, Pablo Espinet and José M. Martín-Alvarez

Abstract

Rod-like complexes [AuX(C[triple bond, length as m-dash]NR)] (X = CN, SCN; R = C6H4OCnH2n + 1-p, C6H4C6H4OCnH2n + 1-p (n = 4, 6, 8, 10, 12); 2-F-4-OC12H25C6H3; 3-F-4-OC12H25C6H3; and 3,4,5-(OC10H21)3C6H2) have been prepared by reaction of [AuCl(C[triple bond, length as m-dash]NR)] with KSCN or AgCN. The free phenyl isocyanides are not liquid crystals, but all the gold complexes display wide ranges of smectic A (SA) mesophases, except the compound [Au(SCN)(CNC6H4OC4H9)] which is not liquid crystalline, and the trialkoxyphenyl derivatives which show columnar hexagonal phases at room temperature. The determining influence of the electronic and structural characteristics of both the pseudohalo and isocyanide ligands on the stabilization and type of mesophase is discussed.

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