Abstract
The charged carrier mobility was measured for the Colh mesophase of a hexa-substituted triphenylene of which one of the peripheral pentyloxy chains is replaced with n-butylamideethyleneoxy group (1) to compare that of hexapentyloxytriphenylene (2). The positive charge mobility was observed to be in the order of 10−5 ∼ 10−4 cm2 V−1 s−1. Though the thermal stability of Colh mesophase is higher than that of 2, the carrier mobility of 1 is smaller by one order of magnitude probably due to the presence of an electrical dipole of the carbonyl group. Also the temperature dependence of mobility in 1 exhabits a thermally activation behavior in a stronger way than in 2, indicating the hydrogen bond interaction affect the thermal behavior of charge hopping by a modification of molecular dynamics.
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