以1-萘乙酸、5,5’-二甲基-2,2'-联吡啶构筑的双核钐配合物的晶体结构和荧光性质

摘要

A complex Sm2(1-npac)6 (dmpy)2·(H2O)3 (1),(1-npac=1-naphthaleneacetate,dmpy=5,5'-dimethyl-2,2'-bipyridine) has been hydrothermally synthesized and characterized by elemental analysis,IR,TGA,powder X-ray diffraction,UV-Vis and single-crystal X-ray diffraction.Structural determination reveals that the samarium ions are bridged by two bidentate and two terdentate carboxylato groups to give centrosymmetric dimers with Sm…Sm separation of 0.3925 (2) nm,which is further extended to a 3D supramolecular structure by hydrogen bonds,C-H … π and π … π stacking interactions.Solid-state 1 emits the intensive orange luminescence of Sm3+ ion with fluorescence lifetime of 0.87 μs (598 nm) at room temperature.CCDC:898378.%水热条件下采用Sm(NO3)3·6H2O,1-萘乙酸和5,5’-二甲基-2,2'-联吡啶作为反应物合成出一个双核钐金属配合物Sm2(1-npac)6(dmpy)2· (H2O)3(1)(1-npac=1-萘乙酸,dmpy=5,5 '-二甲基-2,2'-联吡啶),并分别用元素分析、红外光谱、差热分析、X-射线粉末衍射,紫外-可见光谱和X-射线单晶衍射等表征了该结构.晶体结构分析结果表明:化合物1为双核钐(Ⅲ)配合物,通过分子间的氢键作用以及C-H…π和πr…π的堆积作用,双核分子进一步被连接成三维超分子结构.荧光分析表明常温固态下配合物1发射橙色荧光,荧光寿命为0.87 μs (598 nm).