稀土间氨基苯甲酸8-羟基喹啉三元配合物的合成、表征及抑菌作用研究

以稀土氯化物、间氨基苯甲酸和8-羟基喹啉为原料, 无水乙醇为溶剂, 首次制备了8种稀土-间氨基苯甲酸-8-羟基喹啉固体配合物. 经元素分析、紫外光谱、红外光谱、热重-差热分析和摩尔电导测定,确定了配合物的组成、性质和成键特征, 其组成为RE(MABA)(hq)2(RE=La3+, Ce3+, Pr3+, Nd3+, Sm3+, Eu3+, Er3+, Y3+; hq=C9H6NO-;MABA-=C6H5NH2COO-). 热分析表明, 配合物的热稳定性优于配体. 试验了该系列配合物的抑菌活性, 结果发现稀土三元配合物的抑菌效果比单独的稀土氯化物、间氨基苯甲酸、 8-羟基喹啉的抑菌效果好.     

N,N′,N″-三(2-羟基-1-萘酚醛)胺稀土配合物的合成及其荧光性能的初探

预先制备了N,N′,N″-三(2-羟基-1-萘酚醛)胺作为配体(L),然后向含配体L的乙醇-二氯甲烷溶液中加入含稀土硝酸盐晶体RE(NO3)3.6 H2O(RE=La3+,Sm3+,Y3+,Tb3+,Ce3+,Eu3+)的乙醇溶液,合成稀土配合物。利用核磁共振法、元素分析法、摩尔电导法、红外光谱法及差热-热重法对稀土配合物的结构进行表征。结果表明:稀土配合物的结构为RE(NO3)3.L.4 H2O。采用荧光技术对稀土配合物的性能进行了研究,结果表明:在pH值约为7的介质中,以二甲亚砜(DMSO)为溶剂,稀土配合物浓度为1.0×10-4mol.L-1时,铽(Ⅲ)配合物有较强的特征荧光发射,铕(Ⅲ)配合物只表现了微弱的特征荧光发射,其他稀土配合物没有特征荧光发射。     

小檗碱与稀土硝酸盐二元配合物的合成、表征及抑菌作用

合成具有抑菌活性的稀土配合物,筛选具有抑菌活性的中药成分做有机配体合成稀土配合物.在乙醇溶液中合成了八种小檗碱与稀土硝酸盐的二元配合物,采用元素分析、红外光谱、差热-热重和X射线衍射等方法进行表征,确定配合物的化学组成为RE(NO3)3(B)3(RE=La3+,Sm3+,Nd3+,Dy3+,Pr3+,Y3+,Ce3+,Gd3+;B=C20H18NO4).研究了稀土配合物的抑菌活性,结果表明稀土配合物的抑菌效果较单独的稀土硝酸盐和小檗碱好.     

稀土苯丙氨酸邻菲咯啉三元配合物的合成、表征及抗菌活性研究

以稀土氯化物、L-苯丙氨酸和邻菲咯啉为原料,在乙醇水溶液中反应,制备了一类新型稀土三元配合物。通过元素分析、摩尔电导、红外光谱、拉曼光谱、紫外光谱和热重-差热分析,确定了该配合物的化学组成:RE(Phe)3PhenCl3.3H2O(RE=La3+,Ce3+,Pr3+,Nd3+,Sm3+,Eu3+,Er3+,Y3+;Phe=L-苯丙氨酸;phen=邻菲咯啉)。通过抗菌实验对其抑菌效果进行研究。结果表明,稀土三元配合物对大肠杆菌、金黄色葡萄球菌和白色念珠菌有较强的抑制作用(最小抑菌浓度MIC分别约为65×10-4%,150×10-4%,400×10-4%),属于广谱抗菌剂;抗菌效果明显优于稀土氯化物、L-苯丙氨酸或邻菲咯啉。     

稀土-吡唑啉酮-2,6-吡啶二羧酸配合物的合成、表征及其性质研究

以稀土氯化物、1-苯基-3-甲基-4-苯甲酰基-5-吡唑啉酮和2,6-吡啶二羧酸为原料,制备了一类新型稀土三元配合物,通过元素分析、红外光谱、紫外光谱、热重-差热分析、光电子能谱分析及X射线粉末衍射等手段对配合物进行了表征,确定了该类配合物的化学组成可能为:Na2[RE(PMBP)3(PDA)]·nH2O(RE=Sm3+,Y3+,Er3+,其中La配合物含有一分子配位水)。抗菌实验结果表明,三元配合物对大肠杆菌、金黄色葡萄球菌具一定的抑制作用,Na2[Er((PMBP)3(PDA)]·5H2O对大肠杆菌作用较好,而Na2[Sm(PMBP)3(PDA)]·5H2O对金黄色葡萄球菌作用较好。采用紫外光谱法和荧光光谱法初步研究了配合物与CT-DNA的作用方式,结果表明配合物是以插入模式与DNA结合的。同时配合物Na2[Sm(PMBP)3(PDA)]·5H2O具有荧光特性,可用作荧光探针等,在生物活性上具有一定的应用前景。     

具有生物活性的金属配合物的研究 IV: 3,6-二(二甲氨基)-二苯并碘六环稀土二(氨三乙酸)配合物的合成、性质及抗肿瘤活性

合成了十五种3,6-(二甲氨基)-二苯并碘六环稀土二(氨三乙酸)配合物,[C17H20N2I]3{RE[N(CH2CO2)3]2}.nH2O(RE=La, Eu, Er. n=3; RE=Ce-Nd, b-Ho, Tm,Yb. Y. n=4; RE=Sm, Gd, Lu. n=5). 利用X射线粉末衍射, 热重-差热分析、红外光谱、紫外光谱、^1H-NMR及摩尔电导等对这些配合物进行了表征. 实验表明, 镧配合物对体外L1210癌细胞生长有较好的抑制效果, 对小鼠S180肿瘤生长的抑制效果高于其前体.     

开链冠醚Schiff碱-稀土配合物的合成、表征及近红外发光光谱研究

合成了3个新型开链冠醚Schiff碱-稀土离子三元配合物RE(H2L)(Mq)(NO3)3,其中RE=Nd3 ,Er3 ,Yb3 ,配体H2L=N,N-双(邻羟苯亚甲基)-3,6-二氧杂-1,8-二氨基辛烷,Mq为8-羟基喹哪啶.采用元素分析、红外光谱(IR)、紫外-可见吸收光谱(UV-vis)、热重-差热分析(TG-DTG)等手段对配合物的组成结构进行了表征.测定了3种新型结构稀土三元配合物在不同温度(77 K和300 K)时的近红外发光光谱.     

五,六硝酸根合稀土(Ⅲ)酸4-[2-(3-硝基-4-甲氧基苯基)乙烯基]-1-甲基吡啶配合物的合成及性质

合成了通式为(C_(15)H_(15)N_2O_3)_xRE(NO_3)_y(当RE=La～Gd时,x=3,y=6;RE=Tb～Lu,Y时,x=2,y=5)的一个系列十五种五、六硝酸根合稀土(Ⅲ)酸4-[2-(3-硝基-4-甲氧基苯基)乙烯基]-1-甲基吡啶配合物.通过元素分析、紫外光谱、红外光谱、’H核磁共振谱、热重-差热分析、摩尔电导和X射线粉末衍射分析等对各配合物的结构和性质进行了表征.并对影响其组成变化的因素作了初步探讨.     

具有生物活性的金属配合物的研究——Ⅳ.3,6-二(二甲氨基)-二苯并碘六环稀土二(氨三乙酸)配合物的合成、性质及抗肿瘤活性

合成了十五种3,6-(二甲氨基)-二苯并碘六环稀土二(氨三乙酸〕配合物,[C_17H_20N_2I]_3{RE[N(CH_2CO_2)_3]_2}·nH_2O(RE=La,Eu,Er.n=3;RE=Ce-Nd,b-Ho,Tm,Yb.Y.n=4;RE=Sm,Gd,Lu.n=5)。利用X射线粉末衍射。热重-差热分析、红外光谱、紫外光谱、~1H-NMR及摩尔电导等对这些配合物进行了表征。实验表明,镧配合物对体外L_(1210)癌细胞生长有较好的抑制效果,对小鼠S_(180)肿瘤生长的抑制效果高于其前体。     

具有生物活性的金属配合物的研究 II: 3,6-二(二甲氨基)-二苯并碘六环稀土乙二胺四乙酸配合物的合成, 性质及抗肿瘤活性

合成了十四种新的3,6-二(二甲氨基)-二苯并碘六环稀土乙二胺四乙酸(EDTA)配合物, 其化学式为[C17H20N2I][RE(EDTA)].xH2O(RE=Ce, x=2; Pr, x=3; Nd-Lu, Y,x=4). 利用热重-差热分析, X射线粉末衍射, 摩尔电导,红外及紫外光谱等对这些配合物进行了表征. 试验表明, 配合物对体外癌(L7712)细胞DNA合成的抑制率较其前体为高.     

Furyl- and thienyl-silatranes and germatranes

We review our research on the synthesis and study of the physical and biological properties of furyl- and thienylgermatranes and -silatranes.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 6, pp. 725–732, June, 1992.     

Review and patents and literature

The use of the insect cell/baculovirus expression system for producing recombinant proteins of bacterial, plant, insect, and mammalian origin has become widespread. The popularity of this eukaryotic expression system is due to many factors, including (1) potentially high protein expression levels, (2) ease and speed of genetic engineering, (3) ability to accommodate large DNA inserts, (4) protein processing similar to higher eukaryotic cells (e.g., mammalian cells), and (5) ease of insect cell growth (e.g., suspension growth). The following review of the literature discusses two engineering aspects of recombinant protein synthesis by insect cell cultures: bioreactor scale-up and insect cell line selection. Following this review patent abstracts and additional literature pertaining to expression of recombinant proteins in insect cell culture are listed.     

多环芳二酐型聚酯亚胺膜的透气性能

多环芳二酐型聚酯亚胺膜的透气性能李悦生，丁孟贤，徐纪平（浙江大学高分子科学与工程研究所，杭州，３１００２７）（中国科学院长春应用化学研究所）关键词聚醚酰亚胺，聚酯酰亚胺，膜，透气性通常的聚酰亚胺加工性能较差，在芳环二酐的苯环间引入醚键等柔性基团后，其...     

微量元素与疾病诊断治疗的研究现状及展望

对国内外微量元素与疾病的关系及其诊断治疗的研究现状及研究动向进行了综述，包括：微量元素与地方病、癌肿、心血管病、糖尿病、眼病、神经系统病等。参考文献72篇。     

Preparation and photolysis of poly-p-ethylacrylophenone and poly-p-chloroacrylophenone and their copolymers with styrene and methyl methacrylate

Poly-p-ethylacrylophenone (PPEtAP) and poly-p-chloroacrylophenone (PPClAP) and their copolymers with styrene (PEtAP/S) and (PClAP/S) and with methyl methacrylate (PEtAP/MMA) and (PClAP/MMA) were prepared. Quantum yields of main-chain scissions at 366 nm at room temperature in benzene solution are of the same order as those of the unsubstituted polyacrylophenone and its copolymers. Substitution with chlorine and ethyl group in the para position compared to the unsubstituted polyacrylophenone and its copolymers leads to an increase of the lifetime for the n–π^* excited triplet state, as is evident from the measured quenching constants of photolysis. The low-temperature emission spectra of the copolymers are similar to the spectra of the model compounds in a polymer film. For the homopolymer, however, the character of the emission spectrum changes considerably.     

Concentrations and distributions of trace and minor elements in Chinese and Canadian coals and ashes

A total of 35 trace and minor elements including some of environmental significance were determined in each of a selection of 15 Chinese and 6 Canadian thermal coals and their ashes by using the SLOWPOKE-2 nuclear reactor facility of the University of Toronto. The concentrations and distributions of these constituents among the coals and their combustion products (viz. ash and volatile matter) are presented together with an interpretation of their significance in relation to the large scale combustion of these coals as thermal fuels in industrialized countries such as China and Canada. The detailed results showed wide variations in trace impurity concentrations (up to a factor of 100 and more) among the coals studied with few large differences between those of Chinese and Canadian origin except that the rare earths, Sc, Th, U, I, and Se were much higher in the former, other halogens, As and Na were lower. Values for elemental enrichment factors (EF) relative to normal crustal abundances indicated that only As(EF=13), Br(5.7), I(16), S(230), Sb(11) and Se(320) were appreciably enriched in coal. During static ashing at 750°C most of the halogens, S and Se were volatilized whereas most other inorganic constituents were highly retained and concentrated in the ash by factors of 6 to 11.