摘要
采用两个易扭转异构的双三齿有机配体,双吡啶二甲基-6,6′-二酰肼-2,2′-连吡啶(H2L1)和双吡啶二乙基-6,6′-二酰肼-2,2′-连吡啶(H2L2),和金属镍离子组装得到2个金属螺旋体(helicate),Ni2(HL1)2(PF6)(BF4)(CH3OH)(H2O)2(1)和Ni2(HL2)(H2L2)(ClO4)3(C2H5OH)(CH3OH)H2O)3(2),并测定了它们的晶体结构。同时由配体H2L3出发,通过逐级组装的方法,得到一个镍-银杂金属的配位聚合物Ni2Ag2(HL3)2(ClO4)2(CH3CN)3(3)。单晶结构表明,配位聚合物3中配体H2L3首先与镍离子组装成分子盒化合物(molecularbox),该结构单元进一步通过Ag离子与分子盒外围N原子配位,使分子盒互相串连成一维配位聚合物3,分子盒聚集体沿c方向伸展成一维链结构,链与链之间相互平行,进一步堆积成二维孔道结构。
Two molecular clips with flexible bis-tridentate coordination sites, di （2-pyridylcarbaldehyde）-6,6＇- dicarboxylic acid hydrazone-2,2＇-bipyridine （H2L^1） and di（2-acetylpyridyl）-6,6＇-dicarboxylic acid hydrazone-2,2＇- bipyridine （H2L^2） have been prepared. Dinuclear double-stranded helicate Ni2（HL^1）2（PF6）（BF4）（CH3OH）（H2O）2 （1） and Ni2（HL^2） （H2L^2）（ClO4）3（C2H5OH）（CH3OH）（H2O）3 （2） based on the ligands, H2L^1 and H2L^2 respectively, have been synthesized, their crystal structures were determined by X-ray diffraction method. Meanwhile, the assembly between the modulated ligand, di（2-pyrazinecarbaldehyde）-6,6＇-dicarboxylic acid hydrazone-2,2＇-bipyridine （H2L^3） and mixed metal salts of nickel and silver yields a 1D coordination polymer Ni2Ag2（HL^3）2（ClO4）2（CH3CN）3 （3）. The crystal structure revealed that, in the compound 3, molecular box as metallosupramolecular secondary building units, can be interconnected via the external Ag-N coordination to construct metallosupramolecular aggregate. Another intriguing structure feature of the compound 3 in the solid state is that it forms two-dimensional porous frameworks through the stacking of the 1D aggregated molecular box, in which counter anions and guest solvent molecules are resided. CCDC： 640381, 1, 640382, 2, 640383, 3.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2007年第7期1129-1136,共8页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金资助项目(No.20131020)。
关键词
螺旋
分子盒
多孔结构
逐级组装
配位聚合物
helicate
molecular box
pore structure
hierachical self-assembly, coordination polymer
