基于8-羟基喹啉与d^(10)金属原位合成的双核配合物的合成、晶体结构及其光致发光性质（英文）

Syntheses, Crystal Structures and Luminescent Properties of Dinuclear d^(10) Complexes Based on a Ligand Formed in Situ by 8-Hydroxyquinoline

利用8-羟基喹啉原位反应,通过溶剂热方法制备出3种新颖的d^(10)配合物[M_2(HL)_3]NO_3·H_2O (M=Cd (1),Zn (2,3)),H_2L为1,1-(7,7′-二-(8-羟基喹啉))。单晶结构表明,3种配合物有着相同的带正电荷的结构单元[M_2(HL)_3]^+,但由于客体分子所处空间位置的不同表现为不同的空间结构,配合物1和3结晶于六方晶系(P6_3/m),配合物2结晶于三方晶系(R3)。中心金属离子以六配位的模式与来自HL-配体上的3个氧原子和3个氮原子形成一个轻微扭曲的八面体几何构型。存在于HL-配体与客体分子(NO_3^-,H_2O)间大量的弱作用力在结构空间堆积上起到了重要的作用。3种配合物均具有良好的热稳定性和绿色荧光发射性质。同时,通过从配合物1中提取出原位生成的配体H_2L,首次报道了其蓝色荧光发射性质。

Three novel d^10 complexes[M2(HL)3]NO3·H2O(M=Cd(1),Zn(2,3),H2L=7,7′-(ethane-1,1-diyl)diquinolin-8-ol)have been synthesized under solvothermal conditions.Single crystal X-ray diffraction analysis reveals that the complexes have the same coordination positive charged unit,[M2(HL)3]+,but different lattice structures due to the different places of the guest molecules.Complexes 1 and 3 crystallize in hexagonal system(P63/m)and complex 2 crystallizes in trigonal system(R3).The metal ions are six-coordinated with three oxygen atoms and three nitrogen atoms of three HL-ligands,presenting a slightly distorted octahedron geometry.There are abundant weak interactions between HL-ligands and guest molecule(NO3-and H2O),which play a vital role in the form of the crystal packing.These complexes show good thermal stabilities and exhibit green fluorescence.Further,the fluorescence of ligand H2L extracted from the complex 1 has also been studied firstly and blue light emission of it was observed.CCDC:1842916,1;1842917,2;1842918,3.