固相配位化学反应研究 L ⅩⅩⅢ.等温电导法研究醋酸锰和草酸的室温固相化学反应

本文利用等温电导法考察了醋酸锰和草酸的室温固相配位化学反应的制样方法对实验结果的影响，并获得了该反应的动力学参量。     

用计算模拟方法研究Al_3P_4O_(16)~(3-)计量比的二维层状磷酸铝中的有机胺模板能力

将快速 Monte Carlo方法与分子动力学方法相结合 ,研究了不同种类有机分子在 Al3P4 O3- 1 6 计量比的二维层状磷酸铝形成中的模板能力 .依据主 -客体之间非键相互作用能 (包括范德华能、氢键能和库仑能 ) ,可合理地解释已知实验现象 ,并能有效地预测出适于形成某一特定无机层结构的有机胺模板剂 .通过选择理论预测的有机胺分子作为模板剂 ,成功地合成了二维层状磷酸铝化合物 Al3P4 O1 6 · 1 .5 H3NC6 H1 0 NH3.     

葡萄糖衍生的新型光学活性β－氨基醇的合成

首次报道了以Ｄ－葡萄糖为原料合成新型光学活性葡萄糖衍生类β－氨基醇化合物的新方法。目标化合物：（２Ｓ，３Ｓ）－甲基－２－脱氧－２－苯胺基－４，６－ｏ－苄叉基－α－Ｄ－吡喃阿卓糖苷（７）经各种分析测试手段证实。     

Dendritic Macroinitiator for the Ring—Opening Polymerization of γ—Benzyl L—Glutamate N—Carboxyanhydride

Much effort has been dedicated to the molecular design and synthesis of model proteins to define protein folding interactions and to develop protein-based materials. Among them, the ring-opening polymerization of -amino acid-N-carboxyanhy- drides (NCAs) has drawn much attention because the resulting artificial polypeptides have wide applications in biotechnology, biomineralization and diagnostics1, 2. It is well known that dendrimers are hyperbranched macromolecules possessing a very high co…     

E-olefin dipeptide isostere incorporation into a polypeptide backbone enables hydrogen bond perturbation: probing the requirements for Alzheimer's amyloidogenesis

Herein, we report a stereospecific E-olefin dipeptide isostere synthesis that can be used to make gram quantities of the Phe-Phe isostere desired for eliminating a specific backbone H-bond donor and acceptor in the Alzheimer's disease related Abeta peptide. The Phe19-Phe20 E-olefin analogue of Abeta(1-40) was prepared by solid-phase peptide synthesis and was subjected to amyloidogenesis conditions. This analogue can aggregate into spherical morphologies but does not progress on to form protofibrils or fibrils as is the case for the all-amide sequence, providing insight into the structural requirements for amyloidogenesis.     

测定晶体结构的系统试差法的研究(II)系统位相超解方程得改进

本文证明了|E(k)E(h-k)|的大小是由结构决定的。与原点无关, 在这种认识的基础上, 提出了用归一化结构振幅|E|估量它的三种模式。特别是通过四位相结构不变量的二级Noighborhood~[1,2]原理解决三位相不变量间的匹配问题而算出的|E(k)E(h-k)|_(QE), 这是在没有位相数据的情况下对它的理想的估量。予期它能改进系统试差法中位相超解方程的功能, 提高测得位相的准确性。     

Two new sesquiterpene lactones with the sulfonic acid group from Saussurea lappa

Two new sesquiterpene lactones with the unusual sulfonic acid group, 13-sulfo-dihydrosantamarine (1) and 13-sulfo-dihydroreynosin (2), have been isolated from the roots of Saussurea lappa C. Their structures, including the absolute configurations, were elucidated by spectroscopic methods.     

Chromatographic Features and Molecular Recognition Mechanism of a Strychnine Monolithic Molecularly Imprinted Polymer

A monolithic molecularly imprinted polymer (mMIP) with specific recognition ability for strychnine was prepared by in-situ polymerization, using methacrylic acid (MAA) as a functional monomer, ethylene glycol dimethacrylate (EDMA) as a cross-linking agent, toluene and dodecanol as porogenic solvents and 2, 2’-azobisisobutyronitrile (AIBN) as a initiator. Scanning electron microscopy and mercury intrusion porosimetry were used to identify the structural features of the mMIP. The results show that there were three kinds of pore structures. The large through-pore structure allows mobile phase to flow through a column of mMIP with a low back pressure and the other pores lead to the molecular recognition. Some chromatographic conditions such as the pH and the composition of the mobile phase were characterized. Strychnine was separated from compounds such as indole, quinine and brucine. The possible recognition mechanisms were ionic and hydrogen bonding interactions between the strychnine molecule and the mMIP.     

活性碳纤维ZnO—SACF的制备及其对Ag^＋的氧化还原吸附

制备了含有ＺｎＯ的活性碳纤维ＺｎＯ－ＳＡＣＦ，借助ＡＡＳ，ＷＡＸＤ和ＳＥＭ探讨了ＺｎＯ－ＳＡＣＦ对Ａｇ＾＋的氧化还原吸附特性，并考察了ＺｎＯ在氧化还原中的作用。结果表明，ＺｎＯ－ＳＡＣＦ比ＳＡＣＦ具有对Ａｇ＾＋更高的氧化还原吸附量。外加ＺｎＯ的实验发现，ＺｎＯ本身并不吸附Ａｇ＾＋，但却参与氧化还原反应，中和氧化还原体系所释放出的Ｈ＾＋，提高了体系的ＰＨ值，可以认为，ＰＨ值的提高有利于ＳＡＣＦ电极电     

8-Arylpurines and their ultraviolet absorption spectra

Dehydrocyclization of 4-amino-5-arylamidopyrimidines in polyphosphoric acid to 8-arylpurines was further investigated. Various other 8-arylpurines were synthesized by this new procedure in high purity and yield. The ultraviolet absorption spectra of the arylpurines and the corresponding acylamidopyrimidines were measured at pH 1, 7, and 13 at 0.1 molar ionic strength. The spectra of the purines resemble those of the corresponding acylamidopyrimidines and, to a lesser extent, the corresponding 4,5-diaminopyrimidines. The bathochromic shifts caused by different substituting groups in monosubstituted purines, in general, parallel the inductive effect of the substituting groups. The hyperchromicity and the inductive constant of the substituting groups assume a linear relationship, for substitution at either the 2 or 6 position. These changes in the wave length of maximum absorption and in the molar extinction coefficient caused by 2, 6 and 8 substitutions of the purines reported here are in agreement with previous studies by Mason.