A New Tetra-nuclear Nd(Ⅲ) Coordination Polymer Based on Linear Azide and Isonicotinate Anions: Synthesis, Thermal Stability and Near-infrared Luminescent Properties  

作　　者：ZHONG Zhi-Guo LI Jing FENG Yu-Quan 

机构地区：[1]College of Chemistry and Pharmacy Engineering,Nanyang Normal University,Nanyang 473061,China

出　　处：《Chinese Journal of Structural Chemistry》2020年第11期2046-2052,共7页结构化学（英文）

基　　金：Project supported by the National Natural Science Foundation of China (No. 21601095)。

摘　　要：A novel tetra-nuclear Nd(Ⅲ) coordination polymer, Nd4(μ3-OH)4(μ2-H2O)2(C6H4NO2)6(N3)2(H2O)2(1, C6H4N zide anion), was successfully prepared under hydrothermal conditions and fully characterized by C, H and N elemental analysis, IR spectrum, thermal stability and single-crystal X-ray diffraction. It crystallizes in the triclinic system, space group P1, with Z = 1, a = 8.188(3), b = 12.516(5), c = 12.573(5) ?, α = 107.887(1)°, β = 104.681(2)°, γ = 98.086(6)°, V = 1152.2(8) ?3, M3 r = 1533.73, Dc = 2.210 g/cm, λ = 0.71073 ?, μ = 4.524 mm-1, F(000) = 736, R = 0.0332 and wR = 0.0901 for 3954 observed reflections with Ⅰ > 2σ(Ⅰ) and S = 1.071. The molecular structure of polymer 1 is constructed by four Nd3+ cations, four bridging μ3-OH- anions, two bridging μ2-H2 O, six C6 H4 NO2- anions, two linear azide anions and two coordinated water molecules. The structure of polymer 1 can be viewed as a 3-D supra-molecular network constructed by O-H···O and O-H···N hydrogen bonds between the adjacent chains. Moreover, its near-infrared luminescence and luminescence quenching for Cu2+ cation have also been investigated in detail.

关 键 词：tetra-nuclear Nd(Ⅲ)polymer linear azide anion thermal stability near-infrared fluorescent properties 

分 类 号：TQ317[化学工程—高聚物工业]