PP/TAIC/PE共混体系的辐射增强相界面反应研究

研究了PP/TAIC(三烯丙基异腈脲酸酯)/PE共混体系的辐射增强相界面反应。应用SEM、DDV对共混体系的形态结构和相容性进行了表征,发现多官能团单体TAIC对PP/PE体系有较好的辐射增强作用,共混物的力学性能得到改善。

K+ sensors based on supported alkanethiol/phospholipid bilayers

A novel kind of K+ sensor with valinomycin-incorporated bilayers supported on a gold electrode consisting of self-assembled alkanethiol monolayers (SAMs) and a lipid monolayer has been fabricated successfully. The lipid monolayer is deposited on the alkylated surface of the first alkanethiol monolayer through three different methods, such as the Langmuir-Blodgett (LB) technique, painted method and painted-frozen method. The response of K + sensors produced by a painted or painted-frozen lipid monolayer on an alkanethiol alkylated gold electrode is larger than that by the LB method, which is due to the difference in fluidity of the three kinds of bilayers. Selectivity coefficients KK+, Na+, KK+, Li+, KK+, Ca2+ and KK+, Mg2+ are 10(-4), 10(-4), 2 x 10(-5) and 3 x 10(-5) respectively, and there is no obvious difference among different fabricating methods. A linear response toward the potassium ion was found in the range from 10(-1) M to 10(-5) M with the detection limit of 10(-6) M. The sensor has a slope of 60 mV per decade. Meanwhile, the longevity of the sensor was improved obviously for at least two months at about -10 degrees C. The higher stability shows the possibility to fabricate a practical biosensor.

卟啉LB膜的分子取向,形貌和膜厚度研究

研究了５，１０，１５，２０－四（对－山嵛酸乙酯－α－氧代苯基）卟啉分子在气液界面的成膜性，制备了该化合物的多层ＬＢ膜，研究了分子中不同的基团在ＬＢ膜中的取向，观测了ＬＢ膜的形貌和厚度。利用偏振ＵＶ－Ｖｉｓ和偏振ＦＴ－ＩＲ谱测定了分子内卟啉环和脂链取代基的取向，结果表明卟啉环面法线和脂链轴线与载片法线间的夹角分别为３７°和２７°。利用ＴＥＭ观测了ＬＢ膜的形貌和厚度，结果表明ＬＢ膜表面均匀，单层厚度大约为２．０ｎｍ，该结果与低角Ｘ射线测量结果相一致

十二烷基磺酸钠-水体系相性质的红外光谱

考察了２０％十二烷基磺酸钠（ＳＤＳ）－水体系在不同状态下的红外光谱，通过特征谱带频率的变化，观察到体系能以烷基链堆积方式不同的两种凝聚胶状态存在，确定了体系由凝聚胶相到液晶相的转变温度为４７℃，相应的逆相变温度为３５℃，并讨论了不同相态中的分子构象变化以及水分子对十二烷基磺酸钠分子构象的影响。

含金鸡钠碱的光活性聚合物2.含辛可宁的两亲单体及其两亲聚合物

通过两亲单体２－丙烯酰胺基烷磺酸（ＡＭＣｎＳ）与辛可宁（ＣＮ）成盐后再聚合，或ＡＭＣｎＳ聚合成梳型两亲聚合物后再与ＣＮ成盐，可获得含辛可宁的两亲聚合物。ＡＭＣｎＳ－ＣＮ盐及其相应的两亲聚合物（当ｎ＝６或１６时）具有比ＣＮ好得多的溶解性，易溶于氯仿、ＴＨＦ、乙醇、ＤＭＦ和ＤＭＳＯ等极性不同的溶剂。ＡＭＣｎＳ－ＣＮ盐在乙醇／氯仿（Ｖ／Ｖ＝１／２）中比旋光度等于辛可宁的比旋光度与辛可宁在盐中重量百分数的乘积，而相应两亲聚合物的比旋光度则不能用相似公式进行计算，说明聚合物主链对辛可宁单元的旋光性有重要影响。含ＣＮ的两亲聚合物与ＰＡＭＣ１６Ｓ相似，在乙醇中显示聚电解质的典型特性

热致液晶共聚酯的熔融行为及结晶结构研究

采用ＤＳＣ及ＷＡＸＤ手段对含对羟基苯甲酸热致液晶共聚酯的相变行为及结晶结构进行了初步研究。结果表明，聚合物中存在两种同属于正交晶系的不同堆积形态结晶结构，在相变上表现为双重熔融峰

结晶聚合物中间层理论与实验佐证

概述了Ｆｌｏｒｙ和Ｙｏｏｎ由晶格模型出发，从理论上证明了结晶聚合物中间层的存在以及近年来许多学者采用多种实验技术确认中间层存在的事实

The ion selectivity of monensin incorporated phospholipid/alkanethiol bilayers

Monensin was incorporated into phospholipid/alkanethiol bilayers on the gold electrode surface by a new, paint-freeze method to deposit a lipid monolayer on the self-assembled monolayers (SAMs) of alkanethiol. The advantages of this assembly system with a suitable function for investigating the ion selective transfer across the mimetic biomembrane are based on the characteristics of SAMs of alkanethiols and monensin. On the one hand, the SAMs of alkanethiols bring out their efficiency of packing and coverage of the metal substrate and relatively long-term stability; on the other hand, monensin improves the ion selectivity noticeably. The selectivity coefficients K-Na+,K-K+, K-Na+,K-Rb+ and K-Na+,K-Ag+ are 6 x 10(-2), 7.2 x 10(-3) and 30 respectively. However, the selectivity coefficient K-Na+,K-Li+ could not be obtained by a potentiometric method due to the specific interaction between Li+ and phospholipid and the lower degree of complexion between Li+ and monensin. The potential response of this bilayer system to monovalent ions is fairly good. For example, the slope of the response to Na+ is close to 60 mV per decade and its linearity range is from 10(-1) to 10(-5) M with a detection limit of 2 x 10(-6) M, The bilayer is stable for at least two months without changing its properties. This monensin incorporated lipid/alkanethiol bilayer is a good mimetic biomembrane system, which provides great promise for investigating the ion transfer mechanism across the biomembrane and developing a practical biosensor.

细胞色素P－450单加氧酶的模拟──轴向配体在锰卟啉／亚碘酰苯催化环己烷加氧反应中的作用

细胞色素Ｐ－４５０单加氧酶的模拟──轴向配体在锰卟啉／亚碘酰苯催化环己烷加氧反应中的作用江淑萍，叶兴凯，吴越（中国科学院长春应用化学研究所，长春１３００２２）关键词环己烷，锰卟啉，轴向配体，氧化，单加氧酶目前，细胞色素Ｐ－４５０单加氧酶的模拟有两个途...

添加剂Li_8SiN_4对cBN晶体形貌的影响

在４．５～５．０ＧＰａ，１５００～１８００℃范围内，在Ｌｉ基复合氮硼化物的催化体系中添加Ｌｉ８ＳｉＮ４后，得到了具有光泽的棕色透明的ｃＢＮ单晶。研究了ｃＢＮ晶体的形貌，结果表明，添加Ｌｉ８ＳｉＮ４后得到的等积形ｃＢＮ晶体的百分比明显增多，除部分截角四面体外，多为截角八面体晶体，且棱角尖锐，晶面致密光滑

单斜辉石固溶体CaMgSi_2O_6的合成机理研究

研究了压力和温度对单斜辉石的结晶和晶粒纤维编织的影响。在较低的晶化温度下压力对单斜辉石结晶的影响很明显，这种影响随温度升高而减弱。然而，压力对单斜辉石晶粒纤维编织的影响正相反，在相同的高温下，较高压力下晶化的单斜辉石晶粒纤维比较低压力下得到的晶粒纤维粗壮，而且编织紧密

二烷基膦酸萃取稀土元素（Ⅲ）、钍（Ⅳ）和铁（Ⅲ）

简述了近年来有关二烷基膦酸萃取稀土及相关金属离子的研究动向，展示了我们实验室在这方面的部分研究结果。

聚烯烃／极性聚合物共混物──增容和界面

在不相容的聚烯烃／极性聚合物共混物中，加入增容剂能明显降低共混物界面张力，提高组分的界面相容性．界面张力、分散相平均尺寸的变化与增容剂浓度有定量关系．提出了共混物中增容剂行为的“三阶段”物理模型．实验结果表明，当增容剂浓度较高时，其在聚烯烃与极性聚合物的界面区形成自己的相区．建立了剥露界面的方法．马来酸酐化聚丙烯（ＰＰ－ＭＡ）及其与聚氧乙烯接枝共聚物（ＰＰ－ＭＡ）－ｇ－ＰＥＯ对ＰＰ／ＴＰＵ、ＰＰ／ＰＭＭＡ和ＰＰ／ＰＡ１２共混物均有增容作用．界面相容性是影响聚烯烃／极性聚合物共混物结晶行为的重要因素.

钙钛矿型复合氧化物催化剂中过渡金属离子的状态及其间的相互作用

讨论了Ｂ位二元复合钙钛矿型复合氧化物ＬａＭｙＭ１＇Ｏ３（Ｍ，Ｍ’＝Ｍｎ，Ｆｅ，Ｃｏ；ｙ＝０．０～１．０）中过渡金属离子的状态及其间的相互作用．在Ｍｎ－Ｃｏ复合体系中，富锰区（ｙ＞ｏ．５）Ｍｎ３＋－Ｏ２－－Ｍｎ４＋的铁磁超交换作用对样品的磁性起决定作用．富钴区（ｙ＜０．５）Ｃｏ２＋和ＣｏＩＩＩ离子的存在及其浓度是影响磁性和电导性的主要因素．ｙ＝０．５时样品的结构决定了样品的强铁磁性质．在Ｆｅ－Ｍｎ和Ｆｅ－Ｃｏ体系中Ｆｅ离子的状态的不同主要是由于Ｍｎ、Ｃｏ离子在其周围的分布和氧化还原性质的不同而引起的．

ELECTROCHEMISTRY OF THE TRANSFER OF ISOPOLY AND HETEROPOLY ANIONS ACROSS THE WATER NITROBENZENE INTERFACE - ISOPOLYTUNGSTATE AND HETEROPOLYTUNGSTATE ANIONS

The transfer behavior of the heteropoly anion [H3PW11O39]4- and the isopoly anion [H2W12O39]4- across the water/nitrobenzene interface was investigated by cyclic voltammetry and chronopotentiometry with linear current scanning. The transfer processes were