聚合物载体-稀土金属配合物的研究ⅩⅦ聚(苯乙烯-4-乙烯基吡啶)钕配合物在丁二烯聚合中的催化行为

聚合物载体－稀土金属配合物的研究．聚（苯乙烯－４－乙烯基吡啶）钕配合物在丁二烯聚合中的催化行为李晓莉于广谦＊李玉良（中国科学院长春应用化学研究所长春１３００２２）关键词苯乙烯，乙烯基吡啶，共聚物，钕配合物，丁二烯聚合１９９６－０４－１１收稿，１９９６...

[(t-BuCp)_2YCH_3]_2的合成及其对甲基丙烯酸甲酯的催化聚合活性

［（ｔ┐ＢｕＣｐ）２ＹＣＨ３］２的合成及其对甲基丙烯酸甲酯的催化聚合活性扈晶余＊任劲松沈琪（中国科学院长春应用化学研究所稀土化学与物理开放实验室长春１３００２２）（苏州大学化学系苏州）关键词钇配合物，合成，聚合活性，甲基丙烯酸甲酯１９９６－０４－１８...

丁腈羟增韧环氧树脂固化反应

丁腈羟增韧环氧树脂固化反应李绍英＊＊韩孝族＊刘振海张庆余（中国科学院长春应用化学研究所长春１３００２２）关键词丁腈羟，增韧环氧树脂，固化反应动力学，ＤＳＣ１９９６－０５－０４收稿，１９９６－０９－１７修回＊＊现在河北轻化工学院化工设计研究所工作环氧树...

线性低密度聚乙烯/乙烯醋酸乙烯共聚物共混体系的相容性及性能

线性低密度聚乙烯／乙烯醋酸乙烯共聚物共混体系的相容性及性能杨毓华＊白春霞花荣于李三喜（中国科学院长春应用化学研究所长春１３００２２）（沈阳化工学院高分子科学与工程系沈阳）关键词线性低密度聚乙烯，乙烯醋酸乙烯共聚物，共混，相容性，ＤＳＣ，ＷＡＸＤ，力...

有机化合物的疏水性参数的计算──结构片断常数法

本文在结构片断常数法原理[1]基础上，设计出计算有机化合物的疏水参数的程序软件（CACP），并应用此程序计算了卤代烃类，含硝基烃类，酸和酯类有机化合物的疏水参数LogP值，所得的结果与同类的其他方法所得结果相比较来看，用CACP计算法所得的LogP值与化学实验所得的LogP值更为符合.

A new phosphate, KMgY(PO4)(2), isostructural with xenotime

A new phosphate, KMgY(PO4)(2), isostructural with xenotime, was firstly reported in detail. It crystallizes in tetragonal system with space group I4(1)/amd (No. 141). The cell parameters were obtained from X-ray powder diffraction data with a=0.6886, c=0.6025 nm, 2=2. The proposed structure of KMgY(PO4)(2) was further confirmed by its vibrational spectra, IR and Raman spectra, which were also compared with those of iso-structural YPO4.

Syntheses and crystal structures of [(C6H5CH2C5H4)(2)GdCl center dot THF](2) and (C6H5CH2C5H4)(2)ErCl center dot THF

[(C6H5CH2C5H4)(2)GdCl . THF](2) (1) and (C6H5CH2C5H4)(2)ErCl . THF (2) were prepared by the reaction of LnCl(3) (Ln=Gd, Er) with benzylcyclopentadienyl sodium in THF and characterized by elemental analysis, IR, H-1 NMR, C-13 NMR, MS and thermal gravimetry. The crystal structures of both compounds were determined. Complex 1 is dimeric and its structure belongs to the monoclinic, P2(1)/c space group with a=1.1432(2), b=1.2978(2), c=1.7604(3) nm, beta=108.75(2), V=2.4732(9) nm(3), Z=2(four monomers), D-c=1.54 g . cm(-3). R=0.0342 and R(w)=0.0362. Complex 2 is monomer and its structure belongs to the orthorhombic, P2(1)2(1)2(1) space group with a=0.8645(2), b=1.1394(3), c=2.5289(4) nm, V=2.4919(9) nm(3), Z=4, D-c=1.56 g . cm(-3). R=0.0514, R(w)=0.0529. The determination of the crystal structure shows that in complex 1 the benzyl groups on the cyclopentadienyls coordinated to Gd3+ are located in the opposite direction (139 degrees); in complex 2 the benzyl groups on the cyclopentadienyls coordinated to Er3+ are located in the same direction (6.5 degrees).

Influence of intraperitoneal injection of rare earth compounds on the activities of antioxidant enzymes and the level of lipid peroxidation in mice livers

Following intraperitoneal injection of lanthanum and terbium chloride and their complexes of diethyltriaminopentagacetic acid (DTPA) to adult mice with a dose of 0.28 mmol/kg body weight/day for three days. The activities of superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) and the content of lipid end product, malonaldehyde (MDA) in the mice livers have been assayed respectively. The results show that the activity of SOD was increased and the content of MDA was reduced for LaCl3 treated mice and the two targets were not changed for TbCl3, but the activity of GSH-Px was reduced markedly for both LaCl3 and TbCl3 while the above three targets were not changed for La-DTPA and Tb-DTPA complexes.

Surface roughness characterization of soft x-ray multilayer films on the nanometer scale

The soft x-ray reflectivity of multilayer films is affected by the surface roughness on the transverse nanometer scale. Scanning tunneling microscopy (STM) is an ideal instrument for providing high-lateral-resolution roughness measurements for soft x-ray multilayer films that cannot be obtained with other types of instruments on the transverse nanometer scale. The surface roughnesses of Mo/Si, Mo/C, and W/Si soft x-ray multilayer films prepared by an ion-beam-sputtering technique were measured with a STM on the vertical and transverse attributes. The film roughnesses and average spatial wavelengths added to the substrates depend on the multilayer film fabrication conditions, i.e., material combinations, number of layers, and individual layer thickness. These were estimated to lead to a loss of specular reflectivity and variations of the soft x-ray scattering angle distribution. This method points the way to further studies of soft x-ray multilayer film functional properties and can be used as basic guidance for selecting the best coating conditions in the fabrications of soft x-ray multilayer films. (C) 1996 American Vacuum Society.

γ辐照对异相成核聚酰胺1010的结晶破坏

通过引入异相成核剂（Ｎｄ２Ｏ３）改变结晶－非晶界面，来研究聚集态结构与γ－辐照结晶破坏的关系。利用ＷＡＸＤ，ＤＳＣ和凝胶含量测定的方法研究辐照聚酰胺１０１０的结晶破坏。结果表明：结晶破坏始于结晶表面，结晶的表面积越大，结晶无定形化的剂量越高。结晶表面对结晶起保护作用。

交联XE－60和PEG－20M极性固定相非晶硅膜改性弹性玻璃毛细管柱研究

研究了交联ＸＥ－６０和ＰＥＧ－２０Ｍ极性固定相非晶硅膜改性弹性玻璃毛细管柱，在适当的温度下，用过氧化二异丙苯（ＤＣＵＰ）游离基引发交联，成功地制备了ＸＥ－６０和ＰＥＧ－２０Ｍ极性柱，它们均具有柱效高、惰性好、化学稳定性好和耐溶剂、抗腐蚀、耐高温等性能，是一种新型的极性交联柱。

新型富集材料的研究及应用

研究了４种螯合剂在活性炭上的吸附和解吸特性，并在ｐＨ７，０－７．５范围内对８种元素进行了在二元螯合活性炭柱上的吸附、硝酸反洗及样品分析试验。结果表明，本富集材料适合于野外现场直接富集水质中８种痕量元素，富集倍数为１００，变异系数为０．５８％－２．４８％之间，加入回收率在９６．３％－１０５．５％之间，可用原子吸收法分析。

高纯Tb_4O_7中痕量杂质元素的火花源质谱测定

本文采用同位素稀释和相对灵敏度因子法相结合，定量分析了高纯Ｔｂ＿４Ｏ＿７中的２０多种微量元素的含量。测定检测限０．０ｘ～０．００ｘμｇ／ｇ，大多数元素的相对标准偏差在３０％以内。采用同位素稀释法分析了Ｃｕ、Ｂａ、Ｄｙ三元素，其相对标准偏差均在１０％以内。

两种实现选择激发方法的比较

在无波形发生器的情况下，利用可变衰减器或整形ＤＡＮＴＥ脉冲序列的方法可实现选择激发。通过在ＵＮＩＴＹ－４００ＮＭＲ谱仪上进行的选择激发实验，比较了这两种方法的适用性。结果表明，整形ＤＡＮＴＥ脉冲序列的方法，应用灵活，方便，不需要对谱仪的硬件作任何改动，并且选择激发的轮廓更接近于理想的情况。若激发谱宽范围较大（＞１０００Ｈｚ），建议采用快速变换衰减器衰减幅度的方法；若激发谱宽范围较小（＜１０００Ｈｚ），建议采用整形ＤＡＮＴＥ脉冲序列的方法。

铀原子双色三步激光光电离光谱

对铀原子单色及双色多光子共振电离光谱开展了深入的研究。报道了用双色三步光电离技术测量位于３４２６０～３５８００ｃｍ－１范围内的奇宇称高位能级的位置和Ｊ值