聚甲基丙烯酸4［（4’－烷氧酰基—1’—疏酰基苯）－1－羟乙氧基苯基］酯的合成

聚甲基丙烯酸４［（４’－烷氧酰基—１’—疏酰基苯）－１－羟乙氧基苯基］酯的合成张维邦，蒋，许家瑞，曾汉民（中山大学材料科学研究所广州５１０２７５）关键词侧链液晶高分子，含硫液晶单元液晶的合成侧链高分子液晶是高分子学科中非常活跃的研究领域“’，其特点是...     

聚甲基丙烯酸4［（4＇－硝基－1＇硫酰基苯）－1－羟烷氧基本基］酯的合成

new series of sulfur-contalning side chain liquid crystalline polymers were described. Mesomorphic side chains with methylene spacer in different length have been synthesized and their structures were identified by NMR, IR and MS.The liquid crystalline nature of the polymers was characterlzed by microscopy.The Polymers have liquid crystalline nature.     

聚甲基丙烯酸4［（4＇－硝基－1＇硫酰基苯）－1－羟烷氧基本基］酯的合成

聚甲基丙烯酸４［（４＇－硝基－１＇硫酰基苯）－１－羟烷氧基本基］酯的合成张维邦，蒋，许家瑞，曾汉民（中山大学材料科学研究所广州５１０２７５）关键词含硫液晶单元，侧链液晶高分子，液晶合成与表征侧链高分子液晶是高分子液晶的重要组成部分，是当前高分子科学中...     

液晶研究（Ⅰ）──4＇－酰基－4－羟基－1，1＇－联苯酯类液晶的合成与性质

以４＇－羟基联苯为原料合成了８种新型４＇－酰基－４－羟基联苯酯类化合物．除化合物５＿ｈ外，均为新的近晶相液晶化合物．它们具有较宽的相变温度范围和较高的热稳定性．用偏光显微镜和差热分析仪研究了它们的相行为，讨论了分子结构对液晶相行为的影响．     

1—酰基—4—氯环己烷与取代芳烃的区域与立体选择性反应

从环己烯合成了１－酰基－４－氯环己烷，发现在其在ＡｌＣｌ３催化与苯，氯苯，溴苯等优先生成反式１－芳基－４－酰基环己烷，与联苯反应时选择性较差。     

1－苯氧乙酰基－4－芳酰基氨基硫脲的合成

１－苯氧乙酰基－４－芳酰基氨基硫脲的合成贾学顺，王玉炉，王昀（河南师范大学化学系，新乡４５３００２）许多酰氨基硫脲类衍生物具有抗病毒￣［１］、。抗细菌￣［２］、抗肿瘤￣［３］等功效，因而引起人们的广泛注意。为了深入研究此类化合物的性质，作者将具有生物...     

液晶研究（I）—4′—酰基—4—羟基—1,1′—联苯酯类液晶的合成与…

以４′－羟基联苯为原料合成了８种新型４′－酰基－４－羟基联苯酯类化合物，除化合物５外，均为新的近晶相流晶化合物，它们具有较宽的相变温度范围和较高的热稳定性，用偏光显微镜和差热分析仪研究了它们的相行为，讨论了分子结构对液晶相行为的影响。     

1－芳酰基－4－芳基氨基脲类化合物的合成及表征

利用N－取代三氯乙酰胺与芳基酰肼反应，合成了6个新的1－芳酰基－4－芳基 氨基脲类化合物，其结构经IR，^1H NMR和元素分析证实。初步生物活性测试表明 ，具有一定的除草活性。     

1－芳酰基－3－（4－苯磺酰胺）硫脲类化合物的合成

以无水丙酮作溶剂，由芳酞基异硫氰酸酯与磺胺反应合成了一系列薪的１－芳酸基－３－（４－苯磺酰胺）硫脲。     

刚性链侧链型液晶高分子（甲壳型液晶高分子）研究进展

普通的侧链型液晶高分子属柔性链高分子,而“甲壳型液晶高分子”虽从化学结构着属于侧链型液晶高分子,其性质却和典型的眩链型液晶高分子相似,具有很大的分子链刚性。本文介绍了“甲型液晶高分子”这一科学概念及其研究进展,并对尚待解决的问题进行了探讨。     

有机硅侧链液晶研究进展

综述了国内外有机硅侧链液晶近年来的研究进展，对近晶型、席夫碱型、向列型、胆甾型、偶氮苯型、鱼骨型以及光学非线性型几种主要类型的有机硅侧链液晶进行了详细介绍，并对近年来受到重视的有机硅侧链液晶电流性和离聚物研究进展作了较全面的总结，最后对其应用前景进行了展望。     

侧链液晶聚醚螯合树脂研究进展

相对于传统聚醚螯合树脂,侧链液晶聚醚型螯合树脂由于刚性介晶基元的引入,赋于了聚醚分子更好的使用性能,具有热稳定性好、吸附容量大、离子选择性高、易于设计与合成等优势,成为近年来树脂领域研究的热点之一。本文介绍了近年来国内外侧链液晶聚醚螯合树脂的合成、性能与应用现状。最后依据对侧链液晶聚醚螯合树脂机械性能、吸附选择性、再生性能以及环保性能的使用要求,对其分子设计与合成方法及新应用领域进行了展望。     

Thermotropic laterally attached liquid crystalline polymers: I. New stationary phases for high-performance liquid chromatography

Up to now thermotropic liquid crystalline side chain polymers have been seldom used as stationary phases in high-performance liquid chromatography (HPLC). The preparation of a new class of surface modified silica gels is reported. They are obtained by coating on the silica support liquid crystalline polysiloxanes with mesogenic side groups laterally attached to the polymer backbone through a flexible spacer. Their chromatographic behavior in reversed-phase HPLC is described for the separation of polycyclic aromatic hydrocarbons. The results show excellent planarity and rod shape recognition capabilities. Comparisons with low-molecular-mass liquid crystalline-bonded silica and longitudinally attached liquid crystalline polymer-coated stationary phase are also reported. Finally, comparisons to commercially available C₁₈ phases are described for the separation of complex mixtures.     

Use of a long-spacer-side-chain liquid crystalline polysiloxane containing a crown ether as a stationary phase for capillary gas chromatography

A new kind of side chain liquid crystalline polysiloxane containing a crown ether with a longer spacer (PSC-11) has been prepared and coated on a fused silica capillary column. The main chroma-tographic characteristics including efficiency, polarity, and selectivity have been examined. The phase exhibits the retention properties of both liquid crystal and crown ether stationary phases and possesses higher efficiency and better selectivity than PSC-3, which has a shorter spacer between the main polysiloxane chain and liquid crystalline side chain.     

Liquid crystalline side chain polymer with a poly (Geraniol-co-MMA) backbone and phenylbenzoate mesogenic group: synthesis and characterization

A new side chain liquid crystalline polymers have been synthesized and characterized in which [geraniol-co-MMA] polymer are used as a backbone linked via polymethylene spacer to phenyl benzoate mesogenic group. The polymer exhibits enantiotropic liquid crystallinity with nematic phase and does not exhibit side chain crystallization .A clear difference between the nature of the mesophase is evidenced between [Geraniol-co-MMA] main chain and methacrylate polymers .The LC polymer exhibit glass transition at 40 °C. In a comparative analysis, we discuss the relevance of polymer backbone in the synthesis of side chain liquid crystalline polymers.     

SYNTHESIS AND CHARACTERIZATION OF PALLADIUM COORDINATING IMINE SIDE CHAIN LIQUID CRYSTALLINE POLYSILOXANES

New thermotropic chloro-bridged dinuclear palladium coordinating imine side chain liquid crystalline polysiloxanes have been synthesized. Their mesomorphic properties have been investigated by DSC, X-ray diffraction and polarizing microscopy. The polymeric complexes show nematicdiscotic (Nd) mesophase. It is found that the temperature range of liquid crystalline state of chloro- bridged polymeric complexes is much wider than that of acetato- bridged ones and imine side chain polysiloxane. This indicates that the disc-like chloro-bridged palladium complexing units play a role as mesogen in mesophase.