Journal of the Chemical Society, Dalton Transactions p. 3009 - 3014 (1992)
Update date:2022-08-05
Topics:
Rourke, Jon P.
Fanizzi, Francesco P.
Bruce, Duncan W.
Dunmur, David A.
Maitlis, Peter M.
A novel series of low-melting metallomesogens (metal-containing liquid crystalls) has been prepared and characterised.Reaction of Zeise's salt KA mesophases); those with shorter tails <(m+n) = 8 to ca. 13> show monotropic mesophases, while thosewith longer tails <(m+n) > ca.13> show enantiotropic behaviour.The melting temperatures are lower than would be anticipated for metallomesogens of this size, reflecting the non-centrosymmetric molecular structures which make the crystal packing less easy.A 70:30 mixture of the complexes 2 (n = 12, m = 3; K --> SA at 61 deg C) and (n = 12, m = 6; K --> SA at 70 deg C) shows the transition into the mesophase, K -->SA', at 45 deg C, an unusually low temperature.The mesophase to isotropic (SA -->I) transition temperatures remain rather constant at 92 +/- 4 deg C for all compositions.
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