无溶剂研磨合成双核席夫碱配合物及多组分自分类行为
Self-Sorting of Binuclear Schiff-Base Complexes under Solvent-Free Grinding Conditions
作者单位E-mail
韩王康 江南大学化学与材料工程学院, 无锡 214122  
田蕾 江南大学化学与材料工程学院, 无锡 214122  
徐宗利 江南大学化学与材料工程学院, 无锡 214122  
朱威 江南大学化学与材料工程学院, 无锡 214122  
李志华 江南大学化学与材料工程学院, 无锡 214122  
李涛 江南大学化学与材料工程学院, 无锡 214122  
顾志国 江南大学化学与材料工程学院, 无锡 214122;食品胶体与生物技术教育部重点实验室, 无锡 214122 zhiguogu@jiangnan.edu.cn 
李在均 江南大学化学与材料工程学院, 无锡 214122;食品胶体与生物技术教育部重点实验室, 无锡 214122  
摘要: 利用手动研磨法在无溶剂条件下通过1,4-二(咪唑-2-甲醛)丁烷(A)、2,4-二亚甲基-二(咪唑-2-甲醛)-三甲基苯(B)、2,5-二亚甲基-二(咪唑-2-甲醛)-对-二甲苯(C)中的任一组分与N-乙基乙二胺(D)和三氟甲磺酸亚铁组装合成3个Fe(Ⅱ)席夫碱配合物1、23。X射线单晶衍射表明,配合物1结晶于空间群Cmca23结晶于空间群P21/c1~3中每个Fe(Ⅱ)与配体中6个氮原子配位形成变形八面体FeN6配位环境;每个双臂六齿配体螯合2个亚铁离子,而每个亚铁离子被2条配体包裹形成Fe2L2型双核配合物。基于以上配合物的合成,我们详细研究了混合多组分间的固态自分类行为。研究表明,多组分[D+A+B+Fe2+]或[D+A+C+Fe2+]发生自恋型自分类;而多组分[D+B+C+Fe2+]发生群体型自分类,形成了一个由2个不同类型配体构筑的Fe2LL'杂配型配合物4,同时X射线单晶衍射确证了4的结构。此外,通过与溶液中自分类的对比,我们发现该体系固态自分类表现出更为高效的特点。
关键词: 自分类  无溶剂研磨  双核Fe(Ⅱ)配合物  席夫碱
基金项目: 国家自然科学基金(No.21276105),中央高校基本科研业务费专项资金(No.JUSRP51314B,JUSRP51513)和江苏省双创团队资助项目。
Abstract: Three binuclear iron(Ⅱ) imidazole Schiff-base complexes were constructed by one-pot multicomponent assembly of di(imidazole aldehyde)(A~C), 2-aminoethyl (ethyl) amine(D) and Fe(OTf)2 under solvent-free grinding conditions. X-ray crystallography revealed that the three complexes crystallized in different space groups of Cmca for 1, P21/c for 2~3. And the molecular structures of 1~3 all display Fe2L2 arrangement. In complexes 1~3, two ligand strands wrap around two Fe2+ ions and the Fe2+ ions are coordinated to chelating moieties from two imidazole nitrogen atoms and four amine nitrogen atoms, resulting in the pseudo octahedral FeN6 coordination geometry. Taking advantage of the facile approach above, we then investigated the discrimination abilities of the multicomponent assembly process under the solvent-free condition when different components were mixed together (a mixture of D, two kinds of di(imidazole aldehyde) of A~C and Fe(OTf)2). In this assemble system, combinations[D+A+B+Fe2+] or[D+A+C+Fe2+] adopt narcissistic self-sorting with only two species, while social self-sorting took place in the combination[D+B+C+Fe2+] forming the single heteromer 4, which was composed of two different ligands and exhibited Fe2LL' arrangement. The structure of 4 was further verified by the X-ray analysis by preparing the single crystal of the heteromer 4. To compare the efficiency of solvent-free grinding solid self-sorting against the solution self-sorting, the conventional solution-based self-sorting reactions were also performed using the same starting materials with equal amount. In consequence of the complexity of 1H NMR peaks of mixture, the selectivity is poor in solution. Overall, compared with self-sorting in solution, the solvent-free grinding self-sorting is more efficient due to the certain restrictions of molecular movement.
Keywords: self-sorting  solvent-free grinding  binuclear iron(Ⅱ) complexes  Schiff-base ligands
投稿时间:2016-11-10 修订日期:2017-01-18
摘要点击次数:  157
全文下载次数:  304
韩王康,田蕾,徐宗利,朱威,李志华,李涛,顾志国,李在均.无溶剂研磨合成双核席夫碱配合物及多组分自分类行为[J].无机化学学报,2017,33(4):550-559.
查看全文  查看/发表评论  下载PDF阅读器
Support information: 相关附件:   160639_160639Supporting_Information.doc