摘要
在水溶液中合成了含2,3-吡嗪二羧酸配体的3个镉配位聚合物,{[Cd(pzdc)(2,2′-bpy)]·H2O}n(1),{[Cd(pzdc)(2,2′-bpy)]2H2O}n(2)和{[Cd(pzdc)(H2O)2].2H2O}n(3)。配合物1属单斜晶系,P21/c空间群;配合物2为单斜晶系,P21/n空间群;配合物3为单斜晶系,P21/c空间群。每个pzdc配体通过4个配位原子与3个金属Cd配位,在配合物1和2中形成了具有(4,82)网格状的二维平面构型,而在配合物3中得到了一维链状和氢键3D网络结构。尽管配合物1和2的分子只是结晶水分子数目存在差异,且具有相同的(4,82)网格状二维平面构型,但是他们的分子结构趋向存在很大差别。配合物1和3的荧光光谱均在415 nm处出现较强的发射峰。
Three Cd coordination polymers with 2,3-pyrazinedicarboxylic acid (pzdc) and N-donor ligand, {[Cd(pzde) (2,2'-bpy)] ·H2O}n (1), {[Cd(pzdc)(2,2'-bpy)] ·2H2O}n (2) and {[Cd(pzdc) (H2O)2] ·2H2O}n (3), have been synthesized and characterized. Complex 1 crystallizes in monoclinic, space group P21/c with a=1.082 47(8) nm, b =1.443 01 (9) nm, c=1.025 87(7) nm,β=98.433(3)°, V=1.585 10(19) nm^3; complex 2 belongs to monoelinie, space group P21/n with a=1.171 9(5) nm, b=1.191 8(4) nm, c=1.359 5(6) nm,β=110.474(17)°, V=1.778 9(13) nm^3; complex 3 crystallizes in monoelinic, space group P21/c with a=0.669 54(3) nm, b =0.773 24(3) nm, c =2.070 60(12) nm,β=93.050 4(16)°, V= 1.070 46 (9) nm^3. The X-ray diffraction structure analysis indicates that the pzdc ligand in these complexes is coordinated to three Cd atoms through its four donors, forming a (4,8^2) net 2D network structure in 1 and 2, while obtaining a 1D chain and hydrogen bonding 3D structure in 3. Complexes 1 and 3 both exhibit photoluminescent emissions at 415 nm (λex=313 nm). CCDC: 673389, 1; 673390, 2; 673391, 3.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2009年第5期893-899,共7页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金资助项目(No.20431010和20171012)
关键词
2
3-吡嗪二羧酸
晶体结构
镉配合物
荧光光谱
2,3-pyrazinedicarboxylic acid
crystal structure
cadmium complex
photoluminescence