Thiolato schiff base complexes of nickel and palladium as mesogens and molecular wires
Abstract
Thermal analysis data of compounds A, C, F and I established that they were nonmesogenic
while E and G were found to be mesogenic. The lack of mesogenic behaviour
of A could be attributed to hydrogen bonding. The non-mesogenic behaviour of C and F
is due to reduced molecular anisotropy as a result of large lateral substituents. Complexes
I decomposed at high temperatures and before melting and hence no liquid crystalline
behaviour was found. It is likely that the high decomposition temperature is the result of
increased molecular interactions. We found that removing the phosphine ligands and
increasing molecular length induced liquid crystalline behaviour in complexes E. The
more planar complexes G were also found to be liquid crystalline