共查询到16条相似文献,搜索用时 93 毫秒
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大环多胺及其金属配合物与DNA的相互作用 总被引:1,自引:0,他引:1
本文综述了近年来基于大环多胺及其金属配合物与DNA相互作用的研究进展,着重介绍本课题组在有关单双核、多核以及功能化大环多胺衍生物及其金属配合物与DNA相互作用方面的研究和发现,并对其在化学核酸酶方面的应用进行了讨论。在单双核大环多胺衍生物方面,我们分别合成了以吡啶、苯环、咪唑、三氮唑为侧臂的单核大环多胺金属配合物,同时合成了以刚性桥相连的双核配合物和以柔性链相连的双核配合物。并研究这些单双核大环多胺与DNA的相互作用,发现以刚性链相连的双核大环多胺金属配合物具有很好的切割DNA的性质,可以在低浓度、短时间内切断DNA。在功能化大环多胺方面,我们合成了含有碱基、PNA单体、咪唑鎓盐、冠醚、二茂铁等功能化基团的大环多胺衍生物及金属配合物,并研究了其与DNA的相互作用。在多核大环多胺方面,我们合成了基于大环多胺的寡聚物,研究发现该类物质可与DNA形成复合物,从而有效地保护DNA免于酶解。 相似文献
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苯并咪唑大环四胺金属配合物的超分子识别与催化水解作用 总被引:1,自引:0,他引:1
以1,4,7,10-四氮杂环十二烷(Cyclen)为原料合成了一种新型苯并咪唑大环四胺Zn(Ⅱ)配合物,目标化合物经1H NMR,质谱,元素分析等表征.用紫外光谱法研究了配合物对核苷等的超分子识别作用和对α-吡啶甲酸对硝基苯酚酯(PNPP)的催化水解作用.结果表明配合物与核苷等客体以1∶ 1或1∶ 2形式形成超分子化合物,其中对脱氧鸟嘌呤核苷(2'-Deoxyguanosine,dG)的识别作用最强 (K=31917 dm3·mol-1);对PNPP的催化水解是其在自然条件下水解速率的25倍. 相似文献
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双核大环配合物在模拟金属蛋白活化中心,键合活化小分子及作为双功能催化剂方面具有广阔应用前景。本文就西夫碱型,串连型,具有“软”“硬”空腔的单大环,双大环及大多环双核配合及其配合物的性质和它们仿生方面的研究进展进行综述报道。 相似文献
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Four novel pyridine or benzene ring‐containing pendant macrocyclic dioxotetraamines 2,6‐dixo‐l,4,7,10‐tetraazacyclododecane ligands have been synthesized. Their metal complexes have been investigated as catalysts for the hydrolysis of bis(p‐nitrophenyl) phosphate (BNPP) in aqueous comicellar solution. The results indicate mat the hydrophobic interaction between substrate and metal complex, the nature of transition metal ion, and the micellar microenvironment are important factors for the hydrolysis of BNPP. Large rate enhancement (up to over two‐three orders of magnitude) employing 5 has been observed. 相似文献
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8-羟基喹啉衍生物及其金属配合物的合成与光致发光特性 总被引:6,自引:0,他引:6
设计合成了三种新型的8-羟基喹啉衍生物配体: 5-[(4-E-苯乙烯基)-苯甲亚胺基]-8-羟基喹啉(1), 5-[(4-溴-2-氟)-苯甲亚胺基]-8-羟基喹啉(2)和N-乙基-3-[2-(8-羟基喹啉基)-乙烯基]咔唑(3), 以及它们相应的金属配合物, 产物经质谱(MS)、元素分析(EA)、红外光谱(IR)、紫外光谱(UV)、核磁共振氢谱(1H NMR)进行表征, 并测定了它们的荧光性质. 结果与8-羟基喹啉比较表明, 5位和2位取代8-羟基喹啉衍生物的荧光发生了明显的红移. 同时测定了配合物(3)2Zn的荧光寿命, 结果表明, N-乙基-3-[2-(8-羟基喹啉基)-乙烯基]咔唑锌配合物表现出较长的荧光寿命. 相似文献
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Ajai K. Singh P. Kumar Raghavendra Garima Singh Sumit Bali 《Phosphorus, sulfur, and silicon and the related elements》2013,188(3-4):903-911
Abstract The ligand chemistry of telluroethers, halotellurium ligands, and polytellurides has received good attention in the last decade. Tellurium-containing species have been used to design clusters. In the recent past the ligation of di and tri-telluroethers (including bis(4-methoxyphenyltelluro)methane) has been studied. Hybrid organotellurium ligands, N-[2-(4-methoxyphenyltelluro)propyl]phthalimid (L 1 ), 2-(4-ethoxyphenyltelluromethyl)-tetrahydro-2H-pyran (L 2 ), 2-(2-{4-ethoxyphenyl} telluroethyl)-1,3-dioxane (L 3 ), N-{2-(4-methoxyphenyltelluro)ethyl}morpholine (L 4 ), N-{2-(4-methoxyphenyltelluro)ethyl}-pyrrolidine (L 5 ), bis{2-(pyrrolidine-N-yl)ethyl}telluride (L 6 ), 1-(4-methoxyphenyltelluro)-2-[3-(6-methyl-2-pyridyl) propoxy]ethane (L 7 ), and 2-[2-(4-methoxyphenyltelluro)ethyl]thiophene (L 8 ) have been designed recently and studied for their complexation reactions. The (Te, N) and (N, Te, N) ligands, L 5 and L 6 , coordinate with Hg(II) through Te and N both, but the bonding with N is some what weak. The morpholine nitrogen of L 4 does not coordinate with Pd(II) or Pt(II) along with Te. The L 7 behaving as a (Te, N) ligand has formed 20-membered metallomacrocycle ring with Pt(II). Tellurated Schiff bases 4-MeOC6H4TeCH2CH2N═C(CH3)C6H4-2-OH (L 9 ) and 2-HO-C6H4-(CH3)C═NCH2CH2TeCH2CH2N═C(CH3)C6H4-2-OH (L 10 ) and their reduction products 4-MeOC6H4TeCH2CH2NHCH(CH3)C6H4-2-OH (L 11 ) and 2-HO-C6H4-(CH3)CHNHCH2CH2TeCH2CH2NHCH(CH3)C6H4-2-OH (L 12 ) respectively have been synthesized and studied for ligation behaviour. The L 9 on reaction with the [Ru(p-cymene)Cl2]2 results in [Ru(p-cymene)(4-MeOC6H4TeCH2CH2NH2)Cl]Cl · H2O whereas in the reaction of L 10 with [Ru(p-cymene) Cl2]2, p-cymene ligand is lost resulting in [RuCl(L 10 -H)]. The recent developments, particularly designing of L 1 to L 12 and their ligand chemistry, are reviewed in the present paper. 相似文献