Study of the Complexation Behavior of Calixarene with Transition Metal Cations by UV—vis and Fluorescent Spectra

A new fluorescent compound based on calix[4] arene skeleton was synthesized.Its complexation ability with transition metal ions,such as Fe^3 ,Co^2 ,Ni^2 ,Cu^2 ,Zn^2 and Ag^ ,Was investigated by UV-vis and fluorescent spectra.     

Studies on synthesis and infrared and fluorescence spectra of new europium and terbium complexes with an amide-based open-chain crown ether

An amide-based open-chain crown ether ligand and its complexes with europium and terbium were synthesized. The complexes were characterized by elemental analysis, infrared spectra and conductivity. The europium and terbium ions were found to coordinate to the C=O oxygen atoms and pyridine nitrogen atoms. The fluorescence properties of these complexes in DMF and CH3OH/CHCl3 were studied. Under the excitation of UV light, these complexes exhibit characteristic fluorescence of europium and terbium ions. The solvent factors influencing the fluorescent intensity are discussed.     

稀土对MoSi2力学性能和抗氧化性能的影响

采用自蔓延和真空烧结方法制备了掺杂0．9％La2O3的MoSi2基复合材料，利用热重分析法，SEM和X射线考察了La2O3颗粒对MoSi2力学性能、抗氧化特性以及循环氧化后力学性能的影响。结果表明，与纯MoSi2相比，RE／MoSi2材料的弯曲强度和断裂韧性分别提高了46％和78％；稀土对MoSi2材料的强韧化机制主要是细晶强化、弥散强化和细晶韧化。RE／MoSi2的氧化增重是纯MoSi2的2．5倍，稀土使MoSiz材料的抗氧化性能降低。由于纯MoSi2材料氧化后的晶粒长大，其抗弯强度比氧化前降低了17％。稀土对MoSi2氧化时的晶粒长大倾向有抑制作用，使得RE／MoSi2材料的抗弯强度基本不变。     

钴（Ⅱ）与2,2’-联吡啶-1,1’-二氧化物的多核配合物的合成和性质

以无水CoCl2和2,2’-联吡啶-1,1’-二氧化物为原料,在DMF溶剂中合成了一种多核配合物.经元素分析、紫外光谱、红外光谱和摩尔电导等方法测得它的组成为[Co3(bipyO2)4Cl4]Cl2,并对该配合物的气敏特性进行了研究. 结果表明, 该配合物对氨气有良好的敏感性和选择性.由它制作的传感器可望用于涉氨化工生产中氨浓度的自动测量和控制.     

反相高效液相色谱法半制备分离[T(4-MOP)PS4]卟啉的研究

本文研究了新水溶性５，１０，１５，２０－四（４－甲氧基－３－磺酸苯基）卟啉［Ｔ（４－ＭＯＰ）ＰＳ４］的反相高效液相色谱（ＨＰＬＣ）分离条件。采用ＳｈｉｍｐａｃｋＰＲＥＰ－ＯＤＳ半制备色谱柱，用含有１０ｍｍｏｌ／Ｌ四乙基碘化铵的乙腈－水（体积比２５：７５）为流动相，流速１８ｍＬ／ｍｉｎ，于４１８ｎｍ波长下检测。［Ｔ（４－ＭＯＰ）ＰＳ４］与合成中生成的杂质组分完全分离。经此制备的卟啉纯度高，已成功地应用于自来水样中微量钴、锌、铜离子的ＨＰＬＣ测定中。     

碳铂类似物的合成,表征及对大鼠W—256肉瘤的抑制作用

合成了十八种〔PtA_2X〕·yH_2O,其中A分别为NH_3、CH_3NH_2、1/2乙二胺和1/2(2,3-二甲基-2,3-丁二胺),X分别为1,1-环丙烷二羧酸根(CPrDCA)、2-甲-1,1-环丙烷二羧酸根(2-M-CPrDCA)、2-甲-1,1-环丁烷二羧酸根(2-M-CBDCA)、1,2-环戊烷二羧酸根(CPDCA)和1,1-环已烷二羧酸根(CHDCA),并进行了表征。测定了配合物抑制大鼠W-256肉瘤的活性,发现配合物〔Pt(NH_3)_2X〕系列按X不同有以下的活性次序:CPrDCA>2-M-CPrDCA>CPDCA>CBDCA(碳铂)≥2-M-CBDCA。     

The anion sequence in the phase transformation of mesostructures templated by non-ionic block copolymers

A p6m to Ia3d mesophase evolution is achieved by simply adjusting the acidity and/or anion species in the presence of block copolymers; the unusual anion sequence that affects the phase behavior of block copolymer templated mesostructured solids is revealed to be SO(4)(2-)(HSO(4)(-)) > NO(3)(-) > Br(-) > Cl(-).     

Tree-gel and loop-gel conversions in nonlinear polymerization

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脉冲激光光声量热装置的研制及用之对香豆素激光染料无辐射跃迁过程的研究

本文报道了一套适用于液相体系的高灵敏度脉冲激光光声量热装置的建立。用此仪器对香豆素激光染料C428, C47和C120的无辐射过程进行了研究, 测得它们在无水乙醇中的无辐射跃迁量子产额分别为0.50, 0.47和0.38。