摘要
通过乙酸镍和4-咪唑-1-基-苯甲酸（HL）在不同溶剂热条件下合成了3个新型金属有机骨架化合物[Ni（L）2]n·DMF（1）,Ni（H2O）2（L）2（2）和Ni（L）2（CH3OH）2（3）.化合物1是用N,N-二甲基甲酰胺（DMF）作为溶剂合成的具有菱形孔道的三维骨架化合物;化合物2是在DMF/H2O（体积比4∶1）中合成的水作为终端配体参与配位的二维层状化合物,并通过层与层之间的氢键作用构筑形成了三维超分子结构;当溶剂为甲醇时,得到了二维层状化合物3,且甲醇作为终端配体参与配位.磁学和电化学性质研究结果表明,化合物1～3中相邻镍离子之间存在反铁磁相互作用;在一定的电势范围内出现一对明显的Ni（Ⅱ）/Ni（Ⅲ）氧化还原峰,表明化合物1～3是潜在的磁性材料或电催化剂材料.
Solvent is an important influence factor in the self-assembly process of metal-organic framworks. In this article,using the semi-rigid 4-imidazol-1-yl-benzoic acid organic ligand（ HL） and Ni（ OAc）2·4H2O,three novel metal organic frameworks,[Ni（ L）2]n·DMF（ 1）,Ni（ H2O）2（ L）2（ 2） and Ni（ OCH3）2（ HL）2（ 3）,were synthesized in different solvents. When the solvent was N,N-dimethyl formamide,compound 1 was synthesized,showing a 3D framework with one dimensional diamond channels. Using DMF/H2 O as the solvent,compound 2 was prepared,it exhibits a 2D layer structure with water molecules as terminal ligands,the adjacent layers are linked through hydrogen bonding interactions to form a 3D supramolecular structure.Compound 3 was synthesized in CH3 OH,showing a 2D layer structure. Compounds 1—3 display antiferromagnetic property and exhibit a couple of obvious redox peaks in a certain range of potential,respectively.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2016年第9期1589-1595,共7页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:21171065
21201077)资助~~
关键词
金属有机骨架
磁性
循环伏安法
溶剂效应
Metal-organic framework
Magnetism
Cyclic voltammetry
Solvent effect
