DO ALKOXY CHAINS BEHAVE LIKE A SOLVENT IN THE D-PHASE - DSC STUDY OF BINARY-SYSTEMS, ANBC (N(C)) (N(C) = 8, 16 AND 18)-N-TETRADECANE

The phase behaviour of the binary systems ANBC(n(c))-n-tetradecane, fo r n(c) = 8, 16 and 18, was examined using DSC, paying special attentio n to the role of the alkoxy chain of the ANBC molecule in the D phase double dagger. The dependence of the SmC-D and D-isotropic liquid tran sition temperatures upon the apparent average number of paraffinic car bon atoms closely resembles the n(c) dependence in the series of neat ANBCs, demonstrating that the alkoxy chain behaves, at least in part, like the solvent in lyotropic liquid crystals. The D phase was not det ected in ANBC(8)-n-tetradecane.