摘要
在水热体系中合成了3个中心金属为镍离子,以六配位扭曲八面体构型形成的具有螺旋结构的配位聚合物{[Ni2L2(bib)2·2H2O]·5H2O}n(1),[Ni2L2(bpy)]n(2)和{[Ni2L2(bibpip)2·2H2O]·6H2O}n(3)[H2L=4,4'-三苯胺二甲酸;bib=1,3-二(咪唑基)苯;bpy=4,4-联吡啶;bibpip=1,4-二(4-咪唑苄基)哌嗪].通过单晶及粉末X射线衍射、红外光谱、元素分析和热重分析对这3种化合物进行了表征.结果表明,化合物1属于单斜晶系,C2/c空间群,其骨架为具有{42·65·8}拓扑结构的二维层结构;化合物2属于斜方晶系,Fdd2空间群,其骨架为具有{48·54·63}拓扑结构的三维超分子网络;化合物3属于三斜晶系,P 1空间群,为1个五重穿插的三维超分子网络,其骨架具有{44·62}拓扑结构.
The multidenate 4,4'-( phenylazanediyl) dibenzoic acid( H_2L) ligand and nickel( Ⅱ) ions reacted with 1,3-bis( imidazol-l-yl) benzene( bib) or 4,4-bipyridine or 1,4-bis[4-( 1H-imidazol-l-yl) benzyl]piperazine( bibpip) under the solvothermal reactions,three new metal-organic frameworks with helical structure,namely{ [Ni_2L_2( bib)2·2H_2O]·5H_2O}n( 1),[Ni( HL)2( bpy) ]n( 2) and { [Ni_2L_2( bibpip)2·2H_2O]·6H_2O}n( 3),were presented along with an analysis of the structural features by single-crystal X-ray diffraction. Complexes 1—3 were also characterized by FTIR spectroscopy,elemental analyses,thermal analysis and power X-ray diffraction( PXRD). The results showed that the complex 1 crystallizes in the monoclinic space group C2 / c,exhibited two-dimensional( 2D) layer with { 42·65·8} topology structure; complex 2 crystallizes in the orthorhombic space group Fdd2,gave a 3D framework with { 48·54·63} topology structure; complex 3exhibits a 5-fold interpenetrating 3D framework with a { 44·62} topology.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2016年第7期1250-1256,共7页
Chemical Journal of Chinese Universities
基金
吉林省教育厅"十二五"科学技术研究项目(批准号:2013248)资助~~