Competition and promotion of different mesophases in a series of novel unsymmetrical discotic dimers via subtle modification of spacers and peripheral side chains
The highly ordered columnar plastic (Colhp) phase with charge carrier mobility up to 10−2 cm2 v−1 s−1 which is comparable to that of organic single crystals is considered as a potential charge transport material applied in electronic devices. The Colhp phase formed by monomers hexapropoxytriphenylene (HAT3) and hexabutoxytriphenylene (HAT4) as well as their corresponding symmetrical dimers can be supercooled
具有高达10 -2 cm 2 v -1 s -1的电荷载流子迁移率(与有机单晶相当)的高度有序的柱状塑料(Col hp)相被认为是电子设备中潜在的电荷传输材料。由单体六丙氧基三亚苯基(HAT3)和六丁氧基三亚苯基(HAT4)以及它们相应的对称二聚体形成的Col hp相可以过冷至玻璃态,但未获得单畴。预期可以通过使它们微妙地不对称来设计具有单畴的更持久的玻璃态。带有Col hp的不对称二聚体可以通过将三种不同单体(HAT3,HAT4和HAT5)中的任何两种结合来构建有机相。这里,三个系列的基于苯并菲二聚体Ť 3,4 d米,Ť 4,5 d米,和Ť 3,5- d米,通过改变间隔件的长度(合成米= 6-12),并通过差示扫描量热法,偏光光学显微镜和广角X射线衍射研究了它们的中间相。这些二聚体不仅可以保留相应单体的顺序,而且更容易获得高度有序的单个结构域。令我们惊讶的是,首先在这些不对称的二聚体中观
Columnar liquid crystalline assembly of doubly discotic supermolecules based on tetra-triphenylene-substituted phthalocyanine
作者:Jianjun Miao、Lei Zhu
DOI:10.1039/b927347f
日期:——
A series of doubly discotic supermolecules with four triphenylene (Tp) mesogens attached to a phthalocyanine (Pc) core via flexible alkyl spacers were designed and synthesized. The samples were denoted as Pc(Tp)4. Two alkyl chain lengths (C5 and C12) in the Tp arms and two spacer lengths (C6 and C10) were used to study columnar liquid crystalline (LC) self-assemblies in Pc(Tp)4 samples. The mesophase
Phenylacrylonitrile-bridging triphenylene dimers: the columnar liquid crystals with high fluorescence in both solid state and solution
作者:Hongyu Guo、Liangbin Lin、Jiabin Qiu、Fafu Yang
DOI:10.1039/c7ra10218f
日期:——
The phenylacrylonitrile-bridging triphenylene dimers were prepared and exhibited the ordered hexagonal columnar mesophase and high fluorescence in both the solid state and solution.
By reacting monohydroxytriphenylene 2 with 1,6-dibromohexane and then condensating with 4- hydroxybenzaldehyde, triphenylene derivative with mono-aldehyde group 4 was prepared in ideal yield. Further treating compound 4 with C60 and sarcosine, the novel discotic C60-triphenylene derivative 5 was prepared by 1,3-dipolar cycloaddition in a yield of 35%. DSC analysis and observation with polarized optical microscopy indicated that compound 5 possessed mesomorphic property.
Synthesis of Calixarene-Linked Discotic Triphenylene
作者:Fafu Yang、Hongyu Guo、Jianwei Xie、Jianrong Lin
DOI:10.1002/ejoc.201100685
日期:2011.9
The syntheses of new macrocyclic molecules containing calixarene and discotic triphenylene units in good yields are reported. Structural and conformational characterization of these new compounds was achieved by UV/Vis, FTIR, and NMR spectroscopy; mass spectrometry; and elemental analysis. The liquid-crystalline behavior was studied by polarizing optical microscopy, differential scanning calorimetry