用舒克紧束缚法计算了一种新型香蕉型液晶1,3-phenylene bis[-4-(4’-nonyloxy)phenyliminomethyl]benzoate的电子结构,结果表明:LUMO和HOMO的能量差别主要是受到香蕉型液晶的中心核、桥键(—COO—)的影响,而烷基尾对香蕉型液晶电子结构的影响不大;在6种可能跃迁中,只有能量最低的两种(π→π,n→π)在200-800nm可见光范围内是经常发生的。对于这种香蕉型液晶,电子激发主要发生在4.0eV(310nm)和1.7eV(730nm)处。
The electronic structures of the banana-shaped liquid crystal 1,3-phenylene bis E4-(4'-nonyloxy) phenyliminomethyl] benzoate were calculated with Huckel tight-binding method. The effects of the central core, the linkages and the alkyl tails in the two-branched legs of the banana-shaped liquid crystal were discussed. Among the six transitions outlined, only the two lowest energy ones (π→π,n→π) are often achieved by the energies available in the 200-800 nm spectrum. Energetically favoured electron excitation will take place at 4.0 (310 nm) and 1.7 eV (730 nm), respectively, for the studied molecule.