Synthesis of liquid crystalline anthraquinolyl–triphenylenes
摘要:
The synthesis, electrochemistry and mesogenic properties of novel anthraquinolyl-triphenylenes are described. H-1 NMR, UV-vis, solution electrochemistry and molecular modelling studies indicate that an intermolecular charge-transfer interaction occurs between the anthraquinone moiety and the triphenylene nucleus. (C) 2000 Elsevier Science Ltd. All rights reserved.
Competition and Promotion between Two Different Liquid-Crystalline Building Blocks: Mesogen-Jacketed Liquid-Crystalline Polymers and Triphenylene Discotic Liquid Crystals
Mesogen-jacketed liquid-crystallinepolymers (MJLCPs) containing two triphenylene (Tp) units in the side chains, denoted as PPnV (n = 3 or 6, which is the number of the methylene units between the terephthalate core and Tp moieties in the side chains), were synthesized through conventional free radical polymerization, and the phase behaviors of these new combined main-chain/side-chain liquid-crystalline (LC) polymers
在侧链中包含两个三亚苯基(Tp)单元的介晶夹层液晶聚合物(MJLCP),表示为PP n V(n = 3或6,它是对苯二甲酸酯核和Tp部分之间的亚甲基单元数通过常规的自由基聚合反应合成侧链),并研究了这些新型主链/侧链液晶聚合物的相行为。通过元素分析,高分辨率质谱和1 H / 13 C NMR确认了单体的化学结构。用1对聚合物进行分子表征1 H NMR,凝胶渗透色谱和热重分析。通过差示扫描量热法(DSC),偏振光显微镜和广角X射线衍射(WAXD)研究了聚合物的LC行为。两种聚合物均表现出优异的热稳定性。DSC和WAXD结果表明,共价掺入Tp盘状液晶对MJLCP的LC行为具有巨大影响。如预期的那样,玻璃化转变温度随着间隔物长度的增加而降低。两种聚合物形成棱柱(Φ - [R )相在较高温度下。在低温下,然而,在侧链TP部分形成一个盘状向列(N d)相在与Φ相结合ř由于Tp部分的自组织作用,棒状超
Synthesis and characterization of mesogenic triphenylene-perylene dyads with phenoxy-alkoxy linkers
作者:Xiangfei Kong、Shengping Dai、Guixia Wang、Zhouyang Zhang、Laiqi Zhang、Peihai Liao、Wenting Liu
DOI:10.1080/15421406.2017.1328218
日期:2017.6.13
Three novel triphenylene-perylene dyads with phenoxy-alkoxy linkers (PDI-OPhO-C-n-O-TP6, n = 6, 8, 10) have been synthesized and characterized by FT-IR, MS, C-13, and H-1 NMR. The mesomorphic properties of these compounds were investigated by polarizing optical microscopy (POM) and differential scanning calorimetry (DSC). It was found that the dyads (PDI-OPhO-C-n-O-TP6, n = 6, 8) only showed thermotropic columnar mesophase in the heating process, while the dyad (PDI-OPhO-C-10-O-TP6) showed enantiotropic columnar mesophase in both heating and cooling processes.
Synthesis and Characterisation of Tetrathiafulvalenyl- and Ferrocenyl-Triphenylenes
作者:Graeme Cooke、Abdulla Radhi、Neville Boden、Richard J Bushby、Zhibao Lu、Sarah Brown、Sarah L Heath
DOI:10.1016/s0040-4020(00)00250-7
日期:2000.5
The synthesis, electrochemistry and mesogenic properties of novel tetrathiafulvalenyl- and ferrocenyl-triphenylenes are described. In all cases the juxtaposition of the hexa-alkyloxytriphenylene with a tetrathiafulvalene or ferrocene unit failed to give rise to derivatives displaying a discotic mesophase. Solution electrochemistry of derivatives 7 and 13 has revealed an interaction occurs between the dicationic state of the TTF moiety and the triphenylene nucleus. (C) 2000 Elsevier Science Ltd. All rights reserved.