Preparation of helicity controlled graphites with macroscopically aligned morphology and their functional properties

以不对称反应场为条件，在手性向列相液晶（N*-LC）中合成了螺旋聚乙炔（PA）和聚（3,4-乙烯二氧噻吩）（PEDOT）等螺旋型脂肪族和芳香族共轭聚合物薄膜。然后对螺旋共轭聚合物薄膜进行碳化和石墨化，分别得到螺旋碳膜和石墨膜。通过改变螺旋的感觉和螺距以及不对称LC场的取向，可以很好地控制螺旋石墨膜的螺旋方向、扭转程度和宏观排列。此外，以聚间苯衍生物的自组装芳香共轭聚合物作为炭化和石墨化前驱体，制备了宏观排列的石墨晶须。

We synthesized helical aliphatic and aromatic conjugated polymer films such as helical polyacetylene (PA) and poly(3,4-ethylenedioxythiophene) (PEDOT) films in a chiral nematic liquid crystal (N*-LC) as an asymmetric reaction field. The helical conjugated polymer films were then carbonized and subsequently graphitized, yielding helical carbon and graphite films, respectively. The screw direction, degree of twist, and macroscopic alignment of the helical graphite film were well controlled by changing the sense and pitch of the helix, and the orientation of the asymmetric LC field. Furthermore, macroscopically aligned graphite whiskers were prepared from self-assembled aromatic conjugated polymers of poly(meta-phenylene) derivatives as carbonization and graphitization precursors.