柔性1,5⁃二(2⁃甲基咪唑)戊烷配体构筑的两种锌配合物的合成、结构及性质

Syntheses,Crystal Structures and Properties of Two Zn􀃭Complexes Constructed from Flexible 1,5⁃Bis(imidazol⁃2⁃methyl)pentane Ligand

利用过渡金属锌盐与1,5⁃二(2⁃甲基咪唑)戊烷(BMIP)、5⁃羟基(或5⁃溴)间苯二甲酸(5⁃OHH2IP或5⁃BrH2IP)在水热条件下合成了配合物[Zn(5⁃OHIP)(BMIP)]n(1)和[Zn(5⁃BrIP)(BMIP)]n(2)(BMIP=1,5⁃二(2⁃甲基咪唑)戊烷,5⁃OHIP=5⁃羟基间苯二甲酸根,5⁃BrIP=5⁃溴间苯二甲酸根),对其进行了红外、元素分析表征并用单晶X射线衍射确定了其结构。晶体结构研究表明:配合物1属于单斜晶系,P21/n空间群,β角为101.363(10)°。配合物1是由配体5⁃羟基间苯二甲酸连接锌离子形成一维链状结构,然后由1,5⁃二(2⁃甲基咪唑)戊烷将其连接成二维网络结构。配合物2是由配体5⁃溴间苯二甲酸和1,5⁃二(2⁃甲基咪唑)戊烷连接锌离子形成二维层状结构,由另一方向的1,5⁃二(2⁃甲基咪唑)戊烷连接成三维层柱状结构,最终形成三重贯穿网络结构。此外,研究了配合物1和2的荧光和光降解亚甲基蓝性能,结果表明配合物1和2对亚甲基蓝染料均有较好的降解作用。

Hydrothermal assembly reactions of Zn(NO3)2·6H2O,1,5⁃bis⁃(2⁃methyl⁃imidazol)pentane(BMIP)and 5⁃hydroxyisophthalic acid(5⁃OHH2IP)or 5⁃bromoisophthalic acid(5⁃BrH2IP)ligands resulted in the formation of com⁃plexes[Zn(5⁃OHIP)(BMIP)]n(1)and[Zn(5⁃BrIP)(BMIP)]n(2),respectively.The resulting complexes were character⁃ized by IR spectrum,elemental analysis and single⁃crystal X⁃ray diffraction.Crystal structure analysis shows that complex 1 crystallizes in the monoclinic system,space group P21/n withβ=101.363(10)°.Complex 1 displays a two⁃dimensional layer net constructed by 5⁃hydroxyisophthalic acid and 1,5⁃bis⁃(2⁃methyl⁃imidazol)pentane.For 2,5⁃bromoisophthalic acid and 1,5⁃bis⁃(2⁃methyl⁃imidazol)pentane link Zinc ion into a two⁃dimensional layers,which are pillared by the other BMIP ligands to result in the three⁃dimensional framework from another direction.Finally,it exhibits a fascinating three⁃fold interpenetrating net with dmp topology.Both complexes exhibit a strong photolu⁃minescence in the solid state at room temperature.Moreover,two complexes present good photocatalytic activities in methylene blue(MB)degradation reactions.CCDC:1502156,1;1502157,2.