两个线形三核配合物的晶体结构及性质 |
Crystal Structures and Properties of Two Linear Trinuclear Complexes |
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摘要: 合成并表征了2个新的线性三核配合物[Co2ⅢCoⅡL2(μ-OAc)4](1)和[Ni3L2(μ-OAc)2(CH3OH)2]·2H2O(2),其配体L为2-羟基-1,3-丙二胺和5-氟水杨醛缩合的产物。配合物1与DNA的作用通过紫外-可见光谱、荧光光谱、粘度实验和电化学方法进行了研究。紫外-可见光谱的结果表明配合物1与DNA的结合常数为2.43×105 L·mol-1。荧光光谱的研究结果表明配合物1能取代溴化乙锭和DNA结合,其淬灭常数为4.92×103 L·mol-1。配合物1和2的变温磁学性质研究表明在2个配合物的三金属中心之间均存在反铁磁性耦合。 |
关键词: 线性三核配合物 晶体结构 DNA切割活性 磁性质 |
基金项目: 国家自然科学基金(No.21301131)、中国地质大学(武汉)国家纳米中心开放基金(No.NGM2016KF013)和武汉工程大学科学研究基金(No.10122013)资助项目。 |
Abstract: Two new trinuclear complexes,[Co2ⅢCoⅡL2(μ-OAc)4] (1) and[Ni3L2(μ-OAc)2(CH3OH)2]·2H2O (2), were obtained and fully characterized, where L was the condensation product between 2-hydroxy-1,3-propane diamine and 5-fluorosalicylaldehyde. The interaction of complex 1 with DNA has been investigated by spectroscopy, viscosity measurements and electrochemical studies. Absorption spectroscopic investigation reveals intercalative binding of Co complex with DNA, with a binding constant of 2.43×105 L·mol-1. Fluorescence spectroscopy shows that complex 1 can displace ethidium bromide and bind to DNA, with a quenching constant of 4.92×103 L·mol-1. The variable-temperature magnetisms of complexes 1 and 2 show that there are antiferromagnetic couplings among the three metal centers in both complexes. |
Keywords: linear trinuclear complex crystal structure DNA cleavage activity magnetism |
投稿时间:2017-09-29 修订日期:2018-02-04 |
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王丽雯,尚启高,周晶晶,周红,潘志权,程清蓉.两个线形三核配合物的晶体结构及性质[J].无机化学学报,2018,34(5):957-966. |
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