超分子自组装中涉及阴离子的弱键作用研究
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摘要
阴离子复合物由于在生物学和环境领域的重要性,近年来受到了广泛关注。在阴离子复合物中,通过氢键、配位键等弱键作用,可以形成胶囊~([1])和纳米管~([2])等低维度新颖结构。一些中性受体,通过失去质子方式变为阴离子,也会导致其弱键作用和生化性质的改变。例如,蛋氨酸羟基类似物去质子所得阴离子(MHA_(-H))的铜(Cu~(2+))螯合物可以作为高效的动物饲料微量矿物添加剂~([3])。再如,酰腙类受体去质子所得阴离子的镍复合物Ni(HL)_2与小牛胸腺DNA(CT-DNA)的相互作用要强于相应的酰腙类中性受体H_2L~([4]),如Fig.1所示。探究在超分子自组装中涉及阴离子的氢键、配位键等弱键作用,有利于探索涉及阴离子的超分子自组装机理,为其在生物学和环境相关领域的广泛应用提供理论参考。
Anionic complexation has attracted great interest in recent years due to their great biological and environmental relevance. A series of low dimensional novel structures such as capsule~([1]) and nanotube~([2]) can be constructed by the non-covalent interactions such as metal-ligand coordination and hydrogen bonding. By the deprotonation of neutral synthetic receptors, the anion can be formed, causing the changes of the weak-bond interactions and biochemical properties. For example, the chelate complex of Cu~(2+) with MHA_(-H) anion is an efficient trace mineral additive for animal feeding~([3]). And the deprotonated anion complex Ni(HL)_2 displayed stronger interaction with calf thymus DNA(CT-DNA) than the neutral acylhydrazone ligand H_2L~([4]). Investigation of the weak-bond interactions is beneficial to the mechanism exploration involving anion in the supramolecular self-assembly, providing theoretical reference for their applications in biological and environmental fields.
引文
[1]Yang,Z.;Wu,B.;Huang,X.;Liu,Y.;Li,S.;Xia,Y.;Jia,C.;Yang,X.-J.Chem.Commun.2011,47:2880
    [2]Yang,Z.;Huang,X.;Zhao,Q.;Li,S.;Wu,B.CrystE ng Comm 2012,14:5446
    [3]Yang,Z.;Aygul,N.;Liu,X.;Zhao,S.;Zhao,W.;Yang,S.Chinese J.Struct.Chem.2015,34(1):147
    [4]杨再文,丁作成,刘向荣,赵顺省,张润兰,杨水兰.无机化学学报,2015,31(8):1520

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