4,4′-二（4-氯甲酰苯氧基）二苯砜的合成

对甲基苯基三甲硅基醚;二氯二苯砜;二（氯甲酰基苯氧基）二苯砜;合成     

Crystal Structure and Fluorescent Study of a Terbium(Ⅲ) Coordination Polymer

A novel Tb(Ⅲ) coordination polymer [Tb(bpapO2)2(NO3)3]n [bpapO2 = N2,N6- bi(pyridin-2-yl)pyridine-2,6-diamine-N,N'-dioxide-dioxide] has been synthesized and it exhibits terbium's characteristic fluorescent emission under UV radiation of 326 nm at room temperature. X-ray structural determination indicates that each terbium(Ⅲ) ion, centered in TbO8 core, connects to three adjacent coordinate centers via a bi-dentate ligand bpapO2, forming a one-dimensional coordination polymer. The compound crystallizes in the triclinic system, space group P1, with a = 11.2271(5), b = 11.7997(5), c = 14.8016(6) Ⅲ, α = 72.7060(10), β = 89.9630(10), γ = 66.7680(10)o, Z = 2, Dc = 1.822 g/cm3, V = 1705.14(13) Ⅲ3, F(000) = 932, the final R = 0.0340 and wR = 0.0669 for 4812 observed reflections with I 2σ(I).     

硅胶键合N-丙基氨基磺酸催化合成8-芳基-7,8-二氢-[1,3]二氧杂环戊烯并[4,5-g]苯并吡喃-6-酮类化合物

120℃、无溶剂条件下,硅胶键合N-丙基氨基磺酸可有效催化芝麻酚、芳香醛和米氏酸三组分一锅法合成8-芳基-7,8-二氢-[1,3]二氧杂环戊烯并[4,5-g]苯并吡喃-6-酮类化合物.考察了温度及催化剂用量对产率的影响.产物的结构经1H NMR,13C NMR,质谱和元素分析进行了表征.     

4,4′-二（4-氯甲酰苯氧基）二苯砜的合成

以DMF作溶剂,在四丁基氟化铵 （TBAF）存在下,对甲基苯基三甲硅基醚（1）和4,4＇-二氯二苯砜（2）于100 ℃反应1 h,合成了4,4＇-二（4-甲基苯氧基）二苯砜（3）,产率为92%;加入催化量的N-溴代丁二酰亚胺（NBS）并在光照条件下,与氧气反应得到中间体-4,4＇-二（4-羧基苯氧基）二苯砜（4）,其产率达90%;将化合物4与二氯亚砜反应合成目标产物4,4＇-二（4-氯甲酰基苯氧基）二苯砜（5）,总收率为74.5%（以对甲基苯基三甲硅基醚为基准计算）.     

基于条纹管的压缩超快成像系统理论模拟

对基于压缩感知和条纹相机的压缩超快成像系统进行模拟仿真,原始三维图像I(x-y-t)经数字微镜设备（digital micromirror devices, DMD）进行编码调制,然后传输至狭缝全开条纹变像管,经偏转电场作用后,多幅不同时间图像将叠加,并在CCD上输出最后积分图像。采用总变分还原算法将CCD积分图像重构出多幅原始图像I(x-y-t)。对压缩超快成像系统的图像采集过程及还原算法进行了模拟仿真,获得了激光在空气介质中传输过程的8幅动态二维图像,每幅图像的曝光时间为12.5 ps,重构信号与原始信号的相似度为92%。     

新型多氯取代聚芳醚酮砜的合成与表征

新型多氯取代聚芳醚酮砜的合成与表征;聚芳醚酮砜;四氯对苯二甲酰氯;低温溶液缩聚;无规共聚物     

基于晶闸管的大电流脉冲发生器研制

采用串并联结合的Marx发生器结构,以晶闸管作为开关元件,设计了大电流脉冲发生器。通过导通回路电流分析了脉冲发生器的自触发原理,并模拟了输出脉冲电流激励磁透镜产生磁场的变化曲线。进行实物电路的研制,采用充电电容参数为600 V/2200 μF,充电电压为550 V。在负载电阻为6 Ω,负载电感为31.5 mH的条件下,获得输出电压峰值为?2.1 kV,半高宽为7.34 ms,脉冲前沿为450 ns;输出电流峰值为?225 A,半高宽为6.3 ms,脉冲前沿为4.11 ms。     

Synthesis and Crystal Structure of a Novel Layered Lead（Ⅱ） Carboxylate-sulfonate Compound Templated by 4,4＇-Bipyridine

A new lead(Ⅱ) carboxylate-sulfonate has been hydrothermally synthesized and characterized by X-ray single-crystal and elemental analyses. It crystallizes in triclinic, space group P, with a = 8.1573(6), b = 9.4663(7), c = 12.7488(9) , α = 89.2320(10), β = 80.7380(10), γ = 77.9760(10)°, Z = 2, V = 950.10(12) 3, Mr = 599.57, Dc = 2.096 g/cm3, μ = 9.032 mm-1, F(000) = 572, the final R = 0.0412 and wR = 0.1035. It has a 1D chain structure, and the Pb(Ⅱ) is six-coordinated. Two PbO6 polyhedra are interconnected via edge-sharing into a two-core unit. Such units are further interconnected by 3-sulfonato-benzoic acids into 1D chains which are linked by hydrogen bonds into a layer structure. The 4,4'-bipyridines are located at the interlayer space and link the layers into a supramolecular structure by π-π stacking interactions.