亚氨基二乙酸—硅胶键合相的合成及其在核苷酸分析中的应用

以大孔微球硅胶（３０ｎｍ，８μｍ）为基体，经γ－氨丙基三乙氧基硅烷活化与间隔臂氯代环氧丙烷反应后，再与螯合剂亚氨基二乙酸键合，后者与铜离子（Ⅱ）螯合后，构成定位金属离子亲和色谱固定相。用磷酸盐缓冲溶液（ｐＨ＝７．０）作流动相，经紫外吸收检测（２６０ｎｍ）对核苷酸混合物进行了高效液相色谱分析，取得较满意的结果。     

RNA和DNA中碱基的染料配位亲和色谱分析

ＲＮＡ和ＤＮＡ中碱基的染料配位亲和色谱分析于世林，王金春，王朝晖，兰蔚（北京化工学院应化系，１０００２９）（北京理化测试中心，１０００８１）１引言近二十年来染料配位亲和色谱获得很大的发展，由三螓染料ＣｉｂａｃｒｏｎＢｌｕｅＦ３Ｇ－Ａ和ＰｒｏｃｉｏｎＢ...     

MCM-48固载手性salen Mn(Ⅲ)催化苯乙烯环氧化反应

手性salen Mn（Ⅲ）化合物是非常有效的烯烃不对称环氧化催化剂，近年来对它的非均相化研究越来越受到大家的关注悼圳．以聚合物为载体固载salenMn （Ⅲ）化合物的研究已经取得了很大的进展，相对的无机载体的研究要少得多．本文首次将手性salen Mn（Ⅲ）化合物固载到介孔分子筛MCM-48上，采用FT-IR、XRD、UV-Vis、GC等手段进行表征，并用苯乙烯的环氧化反应表征了其催化活性．     

Thermochemical Properties and Decomposition Kinetics of Ammonium Magnesium Phosphate Monohydrate

Ammonium magnesium phosphate monohydrate NH4MgPO4·H2O was prepared via solid state reaction at room temperature and characterized by XRD, FT-IR and SEM. Thermochemical study was performed by an isoperibol solution calorimeter, non-isothermal measurement was used in a multivariate non-linear regression analysis to determine the kinetic reaction parameters. The results show that the molar enthalpy of reaction above is （28.795 ± 0.182） kJ/mol （298.15 K）, and the standard molar enthalpy of formation of the title complex is （-2185.43 ± 13.80） kJ/mol （298.15 K）. Kinetics analysis shows that the second decomposition of NH4MgPO4·H2O acts as a double-step reaction： an nth-order reaction （Fn） with n=4.28, E1=147.35 kJ/mol, A1=3.63×10^13 s^-1 is followed by a second-order reaction （F2） with E2=212.71 kJ/mol, A2= 1.82 × 10^18 s^-1.     

不对称烷氧基取代聚对苯乙炔的合成及电致发光性能

利用强碱诱导的去卤缩合聚合法，合成了不对称烷氧基取代的聚（２－甲氧基－５－十二烷氧基－１，４－对苯乙炔）（ＰＭＤＰＶ）．其溶解性和成膜性能优于对称取代的聚（２，５－双十二烷氧基－１，４－对苯乙炔）．以ＰＭＤＰＶ为发光层质的聚合物电致发光器件，其发光峰值波长为６０５ｎｍ．并用ＩＲ、ＵＶ－Ｖｉｓ、ＴＧＡ、１ＨＮＭＲ、ＧＰＣ等对所合成的聚合物进行了表征．     

三(邻氟苄基）氯化锡和四(对氟苄基）锡的合成及结构研究

邻氟苄基氯或对氟苄基氯分别与锡反应合成三(邻氟苄基)氯化锡(1)和四(对氟 苄基)锡(2)．经X射线方法测定了新化合物的晶体结构．晶体结构1属单斜晶系，空 间群为P2(1)／n，晶体学参数：a＝0.5896(9)nm,b-1.262(2)nm,c=2.634(4)nm, V=1.959(5)nm^3,Z=4,Dx=1.632g/cm^3,μ（Mo Kα)=14.69cm^-1,F(000)=952, R1=0.0541,wR2=0.1280;晶体结构2属单余晶系，空间群为Cc,晶体学参数：α=1. 0778(6)nm,b=2.3312(14)nm,c=1.0888(7)nm,V=2.460(3)nm^3,Z=4,Dx=1. 499g/cm^2,μ(Mo Kα)=10.82cm^-1,F(000)=1112,R1=0.0302,wR2=0.0590.在化合 物1和2中Sn-C键长分别为0.2136-0.2148和0.2138-0.2180nm,Sn-Cl键长为0.2378 (4)nm,中心锡与亚甲基碳（氯）原子构成畸型四面体。     

季胺盐型表面活性剂与镉试剂显色反应的研究及应用

在三乙醇胺存在下，季铵盐型表面活性剂溴化十六烷基三甲铵，溴化十二烷基二甲基苄铵和溴化十六烷基吡啶分别与１－（４－硝基苯基）－３－「４－苯基偶氮）苯基」－三氮烯形成离子缔合物显色，吸收光谱红移，离子缔合物；ＮＰ－ＰＡＰＴ与ＤＤＭＢＡＢ来１：２与ＣＴＭＡＢ，ＣＰＢ均为１：３；测定了显色体系的ＣＴＭＡＢ，ＤＤＭＢＡＭ，ＣＰＢ的临界胶束浓度，符合比尔定律的范围，表观摩尔吸光系数δｍａｘ，探讨了微量ＣＴＭＡ     

Two-dimensional electron gas characteristics of InP-based high electron mobility transistor terahertz detector

The samples of In_xGa_(1-x)As/In_(0.52)Al_(0.48)As two-dimensional electron gas(2DEG)are grown by molecular beam epitaxy(MBE).In the sample preparation process,the In content and spacer layer thickness are changed and two kinds of methods,i.e.,contrast body doping andδ-doping are used.The samples are analyzed by the Hall measurements at 300 Kand 77 K.The In_xGa_(1-x)As/In_(0.52)Al_(0.48)As 2DEG channel structures with mobilities as high as 10289 cm~2/V·s(300 K)and42040 cm~2/V·s(77 K)are obtained,and the values of carrier concentration(Nc)are 3.465×10~(12)/cm~2and 2.502×10~(12)/cm~2,respectively.The THz response rates of In P-based high electron mobility transistor(HEMT)structures with different gate lengths at 300 K and 77 K temperatures are calculated based on the shallow water wave instability theory.The results provide a reference for the research and preparation of In P-based HEMT THz detectors.     

Microwave Solvothermal Synthesis,Crystal Structures and in Vitro Antitumor Activities of Di-n-butyltin Piperonylate with a Sn_4O_4 Ladder Framework

A two-dimensional supramolecular compound di-n-butyltin piperonylate, {(μ_3-O)(μ_2-OMe)(n-Bu_2Sn)_2[O_2CAr(C_2H_4O)]}_2 constructed by hydrogen bonds with a Sn_4O_4 ladder-like framework, was obtained by the microwave-assisted solvothermal reaction of di-n-butyltin oxide precursor with the piperonylic acid in methanol environments. The composite was characterized by elemental analysis and IR(~1H, ~(13)C and ~(119)Sn) NMR spectra. The compound crystallizes in monoclinic system, space group P21/n with a = 13.3690(12), b = 14.1442(14), c = 16.4022(16) ?, β = 107.191(6)°, V = 2963.0(5) ?~3, Z = 2, Dc = 1.520 g/cm~3, F(000) = 1368, μ = 1.719 mm~(-1), Mo Kα radiation(λ = 0.71073 ?), the final R = 0.0495 and w R = 0.1260 for 6780 observed reflections with I 2σ(I). Its X-ray crystallography diffraction analyses show a Sn_4O_4 ladder-like skeleton, in which two endocyclic tin and one exo tin atoms are bonded to the μ_3-O atom. In addition, one endocyclic tin and one exo tin atoms are respectively bonded to the μ_2-O atom from methanol. The ladder-like molecule has a three-ring fused skeleton, which is almost coplanar. The endocyclic and exocyclic tin atoms were all five-coordinated with distorted trigonal bipyramidal geometry. The antitumor activity showed that the compound had higher activities than cisplatin in HT-29, HepG2, MCF-7, KB and A549 cell line in vitro.