金属卟啉催化条件下有机化合物与CO2的电羧化反应（Ⅴ）

研究了碘化四－（４－三甲胺基苯基）卟啉钴和ＶＢ１２催化ＣＯ２与卤代丁烷的电合成，该反庆在－１．５Ｖ（ｕｓ，ＳＣＥ）即可发生，ＶＢ１２催化产物为预期的戊酸丁酯，而ＣｏＴＰＰ催化产物为ＣＯ２直接还原的草酸二丁酯，并未发现ＣＯ２与卤代烷的反应产物，初步探讨了产生不同产物的原因。     

GAS PERMEABILITY OF COPOLY(1-TRIMETHYL-SILYL-1-PROPYNE-PENTAMETHYL-DISILYL-1-PROPYNE) MEMBRANE

The permeability of copoly (1-trimethylsilyl-1-propyne-pentamethyldisilyl-1-propyne) membrane for twelve gases (0_2, N_2, CO_2, H_2, D_2, He, At, CH_4, C_2H_4, C_2H_6, C_3H_6 and C_3H_8) was examined. The basic laws of solution and diffusion of the gases in the membrane were expounded preliminarily. It was found that a linear relationship between logarithm of diffusion coefficient (D) and critical molar volume (V_c) of the gases. The permeation characteristics of the gases in the copoly (1-trimethylsilyl-1-propyne-pentamethyldisilyl-1-propyne) membrane was also discussed.     

XPS STUDIES ON SURFACE MODIFIED POLY [1-(TRIMETHYLSILYL)-1-PROPYNE] MEMBRANES Ⅱ SURFACE MODIFICATION BY BROMINE VAPOR*

Surface modification of poly [1-(trimethylsilyl)-1-propyne] (PTMSP) membranes bybromine vapor has been studied. It is shown that Br/C atomic ratio at the surfaces increased withthe time of bromination until about 60 min, then it reached a plateau. The results of XPS and IRstudies indicated that the addition of bromine to double bonds and the replacement of H on CH_3 bybromine had taken place so that a new peak at 286.0 eV (C--Br)in C_(1s) spectra and some newbands, e. g. at 1220 and 580cm~(-1) in IR spectra were formed. The fact,t Po_2, permeability ofoxygen, decreased and α_(O_2/N_2), separation factor of oxygen relative to nitrogen, increased withbromination time, shows that surface modification of PTMSP by bromine may be an efficient approach to prepare PTMSP membranes used for practical gas separations.     

三甲基硅烷基丙炔与五甲基二硅烷基丙炔共聚物膜及其气体透过性

研究了三甲基硅烷基丙块与五甲基二硅烷基丙块共聚物〔poly(TMSP-co-PMDSP)〕的成膜特点。poly(TMSP-co-PMDSP)膜的气体透过系数分别为:P_(O2):4×10~3～12×10~3,P_(N2):3×10~3～8×10~3和P_(CO2):2×10~4～4×10~4barrer,气体透过稳定性低,透过行为偏离第二Fick定律,过系数下降,其中溶解系数降低的比例远大于扩散系数的增加比例,在含有凝聚性气体的环境里,膜的气体透过出现表面吸附控制的特征。     

深化校务公开是加强学校民主管理的有效途径

深化校务公开是加强学校民主管理的有效途径。完善运行机制是深化校务公开的基础;拓展公开渠道是深化校务公开的途径;强化民主监督是深化校务公开的保障。只有认真做好这些工作,才能不断提升学校管理工作水平。     

用DSC研究聚砜预聚物的转变

本工作用示差扫描量热法(DSC)研究了双酚A型和酚酞型两种聚砜预聚物的转变。发现两种预聚物经适当的热处理可以在玻璃化转变温度以下和以上分别产生两个转变。这两个转变可分别归之于局部分子间短程有序和长程有序的破坏。同时,得到了这两种聚砜的玻璃化温度与数均分子量的关系式。     

SYNTHESIS OF SEGMENTED COPOLYMERS WITH POLYSULFONES CONTAINING BISPHENOL A OR PHENOLPHTHALEIN UNITS AS HARD SEGMENT

Two series of segmented copolymers with polysulfones, containing bisphenol A and phenol-phthalein units as hard segments respectively, were synthesized. Isocyanate-terminated polyoxy-propylene was used as soft segments for both series.     

金属卟啉催化氧化萘酚 Ⅰ.2-羟基-1,4-萘醌的制备

羟基萘醌;金属卟啉催化氧化萘酚 Ⅰ.2-羟基-1;4-萘醌的制备     

金属卟啉催化萘酚过氧化氢氧化(Ⅱ)──制备2-羟基-1,4-萘醌的氧化机理研究

在低温碱性甲醇溶液中一氯化四苯基卟啉铁催化萘酚H₂O₂氧化高选择性地制取2-羟基-1,4-萘醌(HNQ),以2-萘酚和1-萘酚为底物时HNQ的最高产率分别为57%和40%(纯度>95%).根据金属卟啉催化氧化反应的特性,采用UV-Vis和EPR现场光谱监测催化剂和反应物的光谱变化,提出了羟基游离基加成反应机理.