以碟形柱状相液晶为基础的低维光电导材料

Discotic liquid crystal molecules tend to self-organize into columnar mesophase, which can display unusual high charge career mobility, making it to be utilized to prepare low-dimensional conductive materials by supramolecular assembly. This kind of materials is expected to apply in some advanced technology such as organo-light emitting-diode and optical storage. Our research work mainly contributes to: design and synthesis of series of discotic liquid crystalline compounds with electron-rich center cores which are planar metal complexs, polycyclic or heterocyclic aromatics; polymerization of discotic liquid crystals including types of main chain, side chain and dimer; exploration for enhancing disc-disc stacking stability of columnar structure by introducing non-covalent bond, for example, hydrogen bond; exploration for synthesis of new discotic LC compound with large macrocyclic core in order to enhance p-p interaction, it can be extended from planar center core; study on influence of molecular structure and doping condition on phase and conductive behavior, it was found that the PEO side chains aggregated between the columns can form the ionic channels, making the ion conductivity increased by 3 orders of magnitude when the sample was heated to the columnar mesophase, there are two kinds of conductive mechanism: hole and ionic transfer; the investigations by AFM, X-ray diffraction and isotherm surface pressure(p)-area(A) diagrams based on LB-film experiments demonstrated that mixing small amount of low molar mass homologues with the polymer bearing discotic units can lead to a improved film-forming ability and denser columnar stacking.

利用盘状液晶分子可自组装成柱状相并能表现.出不平常的大?载荷迁移率这一特点, 用超分.子组装技术研制低维光电导材料。该材料可望.用于有机发光二极管和光存贮等先进技术。?.课题的研究目标是通过结构复合、掺杂并通过.高分子化和?位交联以改善材料加工性和控制.其凝聚态结构，得到兼有高迁移率又有好的成.型性的高分子液晶低维光电导材料。.