在溶剂热条件下,利用PYTPY与H3BTC配体分别构建了两个新型配位化合物[Ni(HBTC)(PYTPY)(H2O)2](1)与[Cr(PYTPY)(Cl)3]n·nDMF(2)[PYTPY=4'-(4-吡啶基)-2,2':6',2″-三联吡啶,H3BTC=1,3,5-苯三甲酸,DMF=N,N-二甲基甲酰胺],并通过元素分析、红外光谱、X射线单晶衍射等分析技术对其结构进行了表征.晶体结构分析表明:化合物(1)属于正交晶系,P2(1)2(1)2(1)空间群;化合物(2)属于单斜晶系,P2(1)/c空间群.化合物(1)表现出一维链结构,化合物(2)表现出零维结构.化合物(1)中的结构单元通过π-π相互作用形成一维的双链结构,一维的链通过π-π相互作用进一步形成二维层状结构,最终拓展形成三维超分子网状结构.此外,两个配合物展示了优良的热稳定性.
Two new transition metal complexes,[Ni(HBTC)(PYTPY)(H2O)2](1) and[Cr(PYTPY)(Cl)3]n· nDMF(2)(H3BTC = 1,3,5-benzenetricarboxylic acid,PYTPY = 4'-( 4-pyridyl)-2,2': 6',2″-terpyridine,DMF = N,N-dimethylformamide),have been synthesized and characterized by elemental analysis,IR,UV spectrometer and X-ray single-crystal diffraction. The analysis showed that the crystal structure of compound( 1) belongs to the orthorhombic system,P2( 1) 2( 1) 2( 1) space group; compound( 2) belongs to monoclinic system,space group P2( 1)/c. Complexes( 1) feature one-dimensional chain structures,and the complex( 2) exhibits zero-dimensional structure. Compound( 1) structure unit present double chain structure via π-π stacking interactions,one-dimensional chain to form two-dimensional layer structure via π-π stacking interaction,and eventually expand to form three-dimensional( 3 D) supramolecular framework. In addition,two complexes showed excellent thermal stability.