基于苯四酸和双咪唑甲基苯构筑的Co(Ⅱ)和Ni(Ⅱ)配合物的合成、晶体结构及光催化活性  

Synthesis,crystal structure,and photocatalytic activity of Co(Ⅱ)and Ni(Ⅱ)complexes based on pyromellitic acid and bis(imidazole)methyl benzene

作　　者：符钰培 杨华[1] 乔丹 董露露 陈小莉[1] 崔华莉[1] 刘琳 王记江[1] FU Yu-Pei;YANG Hua;QIAO Dan;DONG Lu-Lu;CHEN Xiao-Li;CUI Hua-Li;LIU Lin;WANG Ji-Jiang(School of Chemistry and Chemical Engineering,Shaanxi Key Laboratory of Chemical Reaction Engineering,Laboratory of New Energy&New Function Materials,Yanan University,Yan′an,Shaanxi 716000,China)

机构地区：[1]延安大学化学与化工学院,陕西省反应工程重点实验室,新能源新功能材料实验室,延安716000

出　　处：《无机化学学报》2023年第12期2393-2406,共14页Chinese Journal of Inorganic Chemistry

基　　金：陕西省自然科学基金(No.2022JZ-49,2022NY-071);延安市重点产业链项目(No.2022SLZDCY-001);陕西省大学生创新创业训练计划项(No.S202210719111);陕西省教育厅重点项目(No.23JY086)资助。

摘　　要：在水热条件下,得到了2例新的配位聚合物[Co(L)_(0.5)(1,3-bib)](1)和[Ni_(2)(L)(1,4-bib)3(H_(2)O)_(2)]·2H_(2)O(2),其中H_(4)L=1,2,4,5-苯四酸,1,3-bib=1,3-双((1H-咪唑1-基)甲基)苯,1,4-bib=1,4-双((1H-咪唑1-基)甲基)苯。并利用元素分析、红外光谱、单晶X射线衍射等对其进行了结构表征。结果表明:1和2均为三维网状结构,完全去质子化的配体(L4-)在1和2中分别采取了μ_(4)-к^(2)∶к^(1)∶к^(2)∶к^(1)和μ_(2)-к^(1)∶к^(0)∶к^(1)∶к^(0)的配位方式。进一步的研究表明,配合物1在H_(2)O_(2)和可见光照射的条件下,在水溶液中对染料甲基橙(MO)和亚甲蓝(MB)有很好的降解效果:在180 min时,降解率分别达到83.2%和84.5%。配合物2在同样的条件下,在水溶液中对染料MB和罗丹明B(RhB)也有较好的降解作用:在180 min时,降解率分别为87.0%和77.4%。此外还详细探讨了1和2对染料光催化降解的机理。Two new coordination polymers[Co(L)_(0.5)(1,3-bib)](1)and[Ni_(2)(L)(1,4-bib)3(H_(2)O)_(2)]·2H_(2)O(2),where H4L=1,2,4,5-benzenetetracarboxylic acid,1,3-bib=1,3-bis((1H-imidazol-1-yl)methyl)benzene,and 1,4-bib=1,4-bis((1H-imidazol-1-yl)methyl)benzene,were synthesized under hydrothermal conditions.The structures of 1 and 2 were con-firmed by elemental analysis,FTIR spectroscopy,single-crystal X-ray diffraction,etc.The results show that 1 and 2 are 3D network structures.The completely deprotonated L4-ligand adopts theμ_(4)-к^(2)∶к^(1)∶к^(2)∶к^(1)mode in 1 and theμ_(2)-к^(1)∶к^(0)∶к^(1)∶к^(0)coordination mode in 2.Further studies showed that in the presence of H_(2)O_(2)and visible light irradiation conditions,1 had good photocatalytic performance for the degradation of MO(methyl orange)/MB(methylene blue)in water,and the degradation rates reached 83.2%and 84.5%at 180 min.Under the same conditions,2 also showed good degradation of the dyes MB and RhB(rhodamine B)in aqueous solution,with 87.0%and 77.4%degradation rates at 180 min,respectively.In addition,the mechanism of photocatalytic degradation of the dye by 1 and 2 was investigated.CCDC:2219951,1;2219953,2.

关 键 词：配位聚合物 晶体结构 光催化降解 

分 类 号：O614.812[理学—无机化学] O614.813[理学—化学]