在吡啶溶剂中氯化镍催化的溴代芳烃自身偶联反应

Pyridine was used as a solvent for homocoupling of aryl bromides catalyzed by nickel chloride/triarylphosphinein the presence of zinc and recycled easily.Triphenylphosphine was the best ligand for nickel in this coupling reac-tion.     

微波促进的氰化反应在液晶材料合成中的应用

卤代芳烃的氰化反应在液晶单体合成中广泛应用,但传统的加热方法反应时间长、温度高.成功地将常压微波有机合成技术应用到氰化反应,使反应时间大大缩短、得率提高.通过微波反应合成了一系列常用的含氰类液晶单体和中间体.     

Brief review of recent research on blue phase liquid crystal materials and devices

Both polymer stabilization and bent-shaped molecule doping strategies are utilized to widen the blue phase range of liquid crystals. The molecular structures of compositions are optimized for high thermo-optical and electro-optical performances. A low temperature applicable blue phase liquid crystal with suppressed hysteresis is achieved. The bistability of one blue phase liquid crystal is investigated. Based on these materials, fast tunable devices such as gratings with polarization insensitivity are designed and fabricated. The materials and device designs demonstrated here are suitable in wide applications requiring fast response time.     

薄层色谱法在三氯蔗糖合成控制中的应用

本文采用薄层层析法对三氯蔗糖合成过程中所涉及的反应物进行分离分析，通过洗择优化展开体系，有效地分离了蔗糖及其酯类衍生物，并实现了蔗糖乙酸酯同分异构体的分离，较为直观地指示了反应进程。     

无配体Pd(Ⅱ)-催化的Suzuki交叉偶联反应中自身偶联的抑制

PdCl₂/i-PrOH体系能够高效地催化卤代芳烃与芳基硼酸的交叉偶联反应，高收率地得到交叉偶联的产物(80-99%)，并且能有效地抑制芳基硼酸的自身偶联反应。     

Micro-patterned liquid crystal Pancharatnam-Berry axilens

A liquid crystal Pancharatnam–Berry(PB) axilens is proposed and fabricated via a digital micro-mirrordevice-based photo-patterning system. The polarization-dependent device behaves as an axilens for a lefthanded circularly polarized incident beam, for which an optical ring is focused with a long focal depth in the transverse direction at the output, and an anti-axilens for a right-handed circularly polarized incident beam,for which an optical ring gradually expands at the output. The modification of the size and the sharpness of the diffracted ring beam is demonstrated by encoding a positive(negative) PB lens term into the director expression of a PB(anti-)axicon.     

蓝相液晶指向有序的定域化及微结构制备

蓝相液晶晶格指向有序性的体系构建对先进光子学应用乃至软物质三维可控生长具有重要的科学与技术意义.对指向有序性的蓝相液晶进行定域化的高分子稳定,进而形成蓝相区域的微结构图案化,有望实现全新的光子调控器件.本文使用稳定性好、操作简易、普遍的摩擦取向方法,达到蓝相晶格指向一致化目的,同时结合掩膜曝光的手段进行区域可控的光聚合,即定域光聚合,达到对蓝相晶格的定域化高分子稳定,实现了晶格指向有序、稳定性强的蓝相区域微结构图案化分布.最后基于这样的特殊结构,研究了潜在的光子学等方面的应用.     

N,N-二[4-(9H-9-咔唑基)苯基]-3,5-二溴苯胺的合成

以3,5-二溴苯胺,碘苯和咔唑为原料,经取代和Ullmann反应合成了一个新的含咔唑三苯胺化合物——N,N-二[4-(9H-9-咔唑基)苯基]-3,5-二溴苯胺,其结构经1H NMR,13C NMR和ESI-MS表征。     

Inhibition of Homo-coupling of Arylboronic Acids in Ligand Free Pd（ll）-Catalyzed Suzuki Reaction

A series of solvents were examined for the ligand free Pd（II）-catalyzed Suzuki reaction of 4-bromotoluene with phenylboronic acid. It was found that the PdCl2/i-PrOH system could efficiently inhibit the homo-coupling of phenylboronic acid and give a cross-coupling product in high yields. The substrates with a wide variety of functional groups were tolerated in the system. A possible mechanism for this system was proposed.     

Liquid crystal Fresnel lens display

A novel see-through display with a liquid crystal lens array was proposed.A liquid crystal Fresnel lens display(LCFLD) with a holographic screen was demonstrated.The proposed display system has high efficiency,simple fabrication,and low manufacturing cost due to the absence of a polarizer and color filter.