T. Kaharu et al., LIQUID-CRYSTALLINE PALLADIUM-ISONITRILE AND PLATINUM-ISONITRILE COMPLEXES - SYNTHESIS, MESOMORPHIC PROPERTIES AND MOLECULAR-STRUCTURE, Journal of materials chemistry, 4(6), 1994, pp. 859-865
Three series of mesogenic isonitrile derivatives and their platinum(II
) (4-6) and palladium(II) (7-9) complexes have been synthesized as a n
ew family of liquid-crystalline materials. The isonitriles themselves
exhibit both nematic and smectic mesophases accompanied by considerabl
e decomposition due to their thermal instability. The coordination of
the isonitriles to a metal results in a large increase in their therma
l stability, and the platinum and palladium complexes show mesomorphic
properties in a high and broad temperature range without any decompos
ition except a few palladium complexes. The liquid-crystalline complex
PtI2(CNC6H4C6H4OC7H15)2 (6, X = I, n = 7) has been crystallographical
ly characterised and the relationships between structure and property
of the metal-isonitrile complexes are discussed.