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1.
以葛根素为配体,用液相法合成了Cu（Ⅱ）配合物。通过电导率测定实验确定了配合物中配体和金属离子的配比,并对配合物进行紫外光谱、红外光谱表征,同时选择超氧阴离子自由基（O2^-·）产生体系为实验体系,考察葛根素及其配合物的抗氧化活性。结果表明：配合物中配体和金属离子的配比为1：1,葛根素依靠酚羟基氧及羰基氧与Cu（Ⅱ）作用形成了配合物,葛根素及其配合物对O2^-·都有很好的清除作用,但由于配合物中酚羟基及羰基数量的减少,清除作用相对稍差。 相似文献
2.
本文报道在ＴＨＦ和ＣＨ２Ｃｌ２溶液中，用过渡金属三苯基膦氯化物与磷硫配体Ｋｄｔｐ（Ｋ［Ｓ２Ｐ（ＯＥｔ）２］）作用合成了Ｐｄ（ＰＰｈ３）（ｄｔｐ）２·ＴＨＦ等五个配合物．并对这些配合物进行了元素分析、红外光谱、核磁共振谱及质谱等表征。 相似文献
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It is difficult to directly dope europium complexes in gel because the excessive water or high acidic condition may lead to their decomposition. We prepared a novel homogeneous TiO2 gel containing Eu-phen complexes by using an in-situ synthesis method. The formation of Eu-phen complexes in sol-gel derived TiO2 was confirmed by luminescence excitation spectra. The effects of temperature and aging time on in-situ synthesis are discussed. The luminescence spectra of gel containing europium complexes were also compared with the pure Eu-phen complexes. 相似文献
5.
环糊精及其衍生物不仅与简单客体分子包合，也与过渡金属配合物发生包合作用，其中环糊精衍生物与过渡金属配合物的包合作用，可通过环糊精修饰形成金属离子加冠环糊精主体分子，再与有机配体分子包合以及发生相互作用来实现。 相似文献
6.
It is difficult to directly dope europium complexes in gel because the excessive water or high acidic condition may lead to their decomposition. We prepared a novel homogeneous TiO2 gel containing Eu-phen complexes by using an in-situ synthesis method. The formation of Eu-phen complexes in sol-gel derived TiO2 was confirmed by luminescence excitation spectra. The effects of temperature and aging time on in-situ synthesis are discussed. The luminescence spectra of gel containing europium complexes were also compared with the pure Eu-phen complexes. 相似文献
7.
Debasis Bandyopadhyay 《Resonance》2001,6(6):71-79
Crowns and crypts constitute a very interesting and important class of complexing ligands. Besides many metal complexes, these ligands made possible the formation of a variety of unusual species among which ‘alkalides’ and ‘electrides’ require special mention. The crowns and crypts are widely studied due to their increasing use in various improbable chemical and physical processes. Further interest in these ligands lies in their use as biochemical models. A brief discussion on the crowns and crypts is presented here. 相似文献
8.
研究了六次甲基四胺的过渡金属配合物的固相合成及其热色性.实验发现固相合成较液相合成具有产率高、合成简便等优点.利用热重-差热分析(TG-DSC)探讨了配合物的变色机理,发现热色性是由于加热前后配位场强度的改变所致. 相似文献
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合成了5-溴水杨醛缩异烟肼Schiff碱（简称BrsalisH2）,同时制备了该配体的金属配合物．利用元素分析、摩尔电导、红外光谱、紫外光谱和热重分析等方法对配合物进行了表征．结果表明：BrsalisH。可以采用烯醇式或烯酮式与金属配位,配合物的组成分别为：[Cu（H2O）（Brsalis）]（Ⅰ）、I-Ni（H2O）（Brsalis）]（Ⅱ）、[Co（BrsalisH）2]·4H2O（Ⅲ）,其中,BrsalisH2为C13H12O2N3Br． 相似文献
10.
AZAM Faizul SINGH Satendra KHOKHRA Sukhbir Lal PRAKASH Om 《Journal of Zhejiang University. Science. B》2007,8(6)
Objective: A series of 2-benzylideneaminonaphthothiazoles were designed and synthesized incorporating the lipo- philic naphthalene ring to render them more capable of penetrating various biomembranes. Methods: Schiff bases were synthe- sized by the reaction of naphtha[1,2-d]thiazol-2-amine with various substituted aromatic aldehydes. 2-(2'-Hydroxy)ben- zylideneaminonaphthothiazole was converted to its Co(II), Ni(II) and Cu(II) metal complexes upon treatment with metal salts in ethanol. All the compounds were evaluated for their antibacterial activities by paper disc diffusion method with Gram positive Staphylococcus aureus and Staphylococcus epidermidis and Gram negative Escherichia coli and Pseudomonas aeruginosa bac- teria. The minimum inhibitory concentrations of all the Schiff bases and metal complexes were determined by agar streak dilution method. Results: All the compounds moderately inhibited the growth of Gram positive and Gram negative bacteria. In the present study among all Schiff bases 2-(2'-hydroxy)benzylideneaminonaphthothiazole showed maximum inhibitory activity and among metal complexes Cu(II) metal complex was found to be most potent. Conclusion: The results obtained validate the hypothesis that Schiff bases having substitution with halogens, hydroxyl group and nitro group at phenyl ring are required for the antibacterial activity while methoxy group at different positions in the aromatic ring has minimal role in the inhibitory activity. The results also indicated that the metal complexes are better antibacterial agents as compared to the Schiff bases. 相似文献
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Objective： A series of 2-benzylideneaminonaphthothiazoles were designed and synthesized incorporating the lipophilic naphthalene ring to render them more capable of penetrating various biomembranes. Methods： Schiff bases were synthesized by the reaction of naphtha[1,2-d]thiazol-2-amine with various substituted aromatic aldehydes. 2-（2＇-Hydroxy）ben- zylideneaminonaphthothiazole was converted to its Co（Ⅱ）, Ni（Ⅱ） and Cu（Ⅱ） metal complexes upon treatment with metal salts in ethanol. All the compounds were evaluated for their antibacterial activities by paper disc diffusion method with Gram positive Staphylococcus aureus and Staphylococcus epidermidis and Gram negative Escherichia coli and Pseudomonas aeruginosa bacteria. The minimum inhibitory concentrations of all the Schiff bases and metal complexes were determined by agar streak dilution method. Results： All the compounds moderately inhibited the growth of Cram positive and Gram negative bacteria. In the present study among all Schiff bases 2-（2＇-hydroxy）benzylideneaminonaphthothiazole showed maximum inhibitory activity and among metal complexes Cu（Ⅱ） metal complex was found to be most potent. Conclusion： The results obtained validate the hypothesis that Schiff bases having substitution with halogens, hydroxyl group and nitro group at phenyl ring are required for the antibacterial activity while methoxy group at different positions in the aromatic ring has minimal role in the inhibitory activity. The results also indicated that the metal complexes are better antibacterial agents as compared to the Schiff bases. 相似文献
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王福民 《渭南师范学院学报》2003,18(5):28-31
桥联配合物是从化学键的角度通过桥配体结合起来的化合物．多核配合物是从原子数目上讲含有多个金属原子的化合物，从概念上讲二者略有不同，不能将他们混为一谈．文章讨论了二者的联系与区别，提出了桥联配合物的定义、命名，并研究了主族元素桥联配合物的结构与功能和在周期表中形成的倾向性。 相似文献
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谭君 《重庆第二师范学院学报》2006,19(6):11-12,15
槲皮素对金属离子具有强烈的螯合作用。本文研究表明在pH4．6的HAc—NaAc缓冲液中，槲皮素能与Cu（Ⅱ）形成稳定的配合物，在紫外光谱中其吸收带Ⅰ比单独槲皮素红移了59nm。采用等摩尔连续变化法测得槲皮索-Cu（Ⅱ）配合物的配位比为2：1，采用平衡移动法测得配合物的稳定常数为2．0410^8。并初步探讨了槲皮素与Cu（Ⅱ）配位的部位是30H～4C=0。 相似文献
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以乙醇为溶剂,用自制的姜黄素衍生物（L1~L2）和碘亚铂酸钾为原料,合成得到了两种姜黄素类铂（Ⅱ）配合物（A和B）,通过IR1、HNMR、MS和元素分析对目标化合物进行了结构表征。并对它们的紫外可见电子光谱、单、双光子荧光光谱和双光子吸收截面进行了初步地研究。 相似文献
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以无水乙醇为介质在空气中合成了水合稀土高氯酸盐和配体 Et2 Dtc· H2 NEt2及 DATPM的三元固体配合物 ,其组成为 [RE( Et2 Dtc) 3 ( DATPM) ]( RE=La,Nd)。通过对配合物进行元素分析、摩尔电导、红外光谱和热分析的研究 ,推测了配合物的可能结构。结果表明 ,该类三元配合物比相应的二元配合物有更高的稳定性。 相似文献
16.
双环戊二烯基钛(锆)不饱和羧酸配合物的合成 总被引：1，自引：0，他引：1
利用各种取代苯甲醛 ,通过Perkin反应或安息香缩合反应制备取代苯基丙烯酸钠盐配体 ,再与二氯二 (甲基 )茂钛 (锆 )反应 ,得到相应的配合物 .控制配体的加入量 ,可以得到二氯二 (甲基 )茂钛 (锆 )的双分子羧酸配合产物和单分子羧酸的配合物 相似文献
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以L-赖氨酸、L-苏氨酸和三碘化砷为原料,采用室温固相合成法合成了两种新型氨基酸砷配合物。通过元素分析、紫外光谱、X-射线粉末衍射和红外光谱对配合物进行了表征,确定了配合物的化学组成和结构,并研究了配合物的抑菌活性。 相似文献
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施立新 《喀什师范学院学报》2006,27(3):61-62
含氮杂环系列衍生物由于此类物质具有大π键及N原子的特殊性,有着独特的光、磁性能,所以多年来含氮杂环系列衍生物及其配合物一直是人们研究的热点之一.通过对以含氮杂环系列衍生物的光、磁性质研究,发现了N-氧化4-硝基2-甲酸吡啶是一种新的二阶非线性光学材料,并介绍其合成过程,对其进行了表征. 相似文献
20.
一类新型二硫纶金属配合物的超导性和超导理论模型 总被引：1，自引：0，他引：1
报道了1,3－二流－2－硫酮－4,5－二硫酵（1,3－dithiole－2－thione－4,5－dithiolate,简记dmit）金属配合物的超导性;借助与标题配合物结构相似的四硫富瓦烯－四氰基喹喏二甲烷（TTF·TCNQ）电荷转移型化合物的晶体导电模型,阐述了标题配合物超导性的本质特征,讨论了它们的超导性与其结构的关系． 相似文献