129090-53-5Relevant articles and documents
The Effect of Halogen Substitution on the Side Chains of Discotic Liquid Crystals
Lillya, C. P.,Collard, D. M.
, p. 201 - 207 (2007/10/02)
The thermal phase behavior of the hexa(ester)s of benzene-, 1,2,3,4,5,6-all trans cyclohexane- and 2,3,6,7,10,11-triphenylene-hexa(alcohol)s with ω-bromine substituted side chains is described.Terminal bromine substitution on the side chains of cyclohexane hexaesters gives a series of discogens for which the clearing temperature decreases monotonically as side chain length increases, ΔTM-I = -133 deg C for the span of side chain lengths C5 to C11.In contrast, the parent discogens exhibit only a small decrease of TM-I as the side chain increases in length from C6 to C12, ΔTM-I = -23 deg C.This effect is discussed in terms of dipole-dipole interactions between the side chain termini and between the side chains and the disc-like core.