Max-Planck-Institut für Polymerforschung, D-55021 Mainz, Germany.
Phys Rev Lett. 2011 Dec 16;107(25):257801. doi: 10.1103/PhysRevLett.107.257801. Epub 2011 Dec 14.
Aromatic disk-shaped molecules tend to self-organize into a herringbone packing where the disks are inclined at angles ±θ with respect to the axis of the column. In discotic liquid crystals this can introduce defects between stacks of limited length. In a C(3)-symmetric hexa-peri-hexabenzocoronene, solid-state NMR, x-ray scattering, and rheology identifies such a packing with θ=43° and stacks of about seven disks. Disordered regions containing defects fill the space in between the ordered stacks. Biaxial intra- and intercolumnar dynamics differing by eight decades are identified.
芳香盘状分子倾向于自组装成鱼骨状堆积，其中盘与柱轴的夹角为±θ。在碟状液晶中，这可能会在有限长度的层之间引入缺陷。在具有 C(3)对称性的六-全-六苯并蔻烯中，固态 NMR、X 射线散射和流变学确定了这种堆积方式，θ=43°，堆积了大约七个盘。无序区域包含缺陷，填充在有序层之间的空间中。识别出具有 8 个数量级差异的双轴向柱内和柱间动力学。
