Structural assembly from 1D to 3D motivated by the linear co-ligands, and the magnetic and photocatalytic properties of five NiII coordination polymers with 5-(4′-carboxylphenyl)nicotinic acid

被引:8
作者
Wang, Zhixiang [1 ]
Ren, Yixia [1 ]
Cao, Jia [1 ]
Tang, Long [1 ]
Zhang, Meili [1 ]
Zhou, Shanhong [1 ]
机构
[1] Yanan Univ, Affiliated Hosp, Coll Chem & Chem Engn, Shaanxi Key Lab Chem React Engn, Yanan 716000, Peoples R China
基金
中国国家自然科学基金;
关键词
CRYSTAL-STRUCTURES; FLEXIBLE BIS(TRIAZOLE); HYBRID MATERIALS; DIVERSITY; POLYOXOMETALATE; NETWORKS; SERIES; LUMINESCENCE; BIS(IMIDAZOLE); CONSTRUCTION;
D O I
10.1039/c8nj02921k
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Five novel nickel(II) coordination polymers, namely, [Ni(cpna)(4,4'-bipy)(H2O)(2)] (1), [Ni(cpna)(1,4-bbi)-(H2O)]center dot H2O (2), [Ni-4(cpna)(4)(H2O)(8)] (3), [Ni-2(cpna)(2)(4,4'-bbpy)(H2O)] (4), and [Ni (cpna)(1,4-bibz)(0.5)(H2O)]center dot H2O (5) (H-2 cpna = 5-(4'-carboxylphenyl) nicotinic acid; 4,4'-bipy = 4,4'-bipyridine; 1,4-bbi = 1,4-bisbenzimidazole; 4,4'-bbpy = 4,4'-bis(imidazol-1-ylmethyl) biphenyl; 1,4-bibz = 1,4-bis(1-imidazoly)-benzene), have been synthesized under hydrothermal conditions based on H(2)cpna and four different linear N-donor co-ligands. Structural analyses show that all Ni(II) ions lie in slightly distorted six coordinated octahedral geometries. Complexes 1-5 exhibit a variety of architectures: 1 features a 1D chain structure, complex 2 possesses a 2D network, and compounds 3-5 display a 3D framework with dimer Ni-2 units, which might be affected by the coordination modes and lengths of the co-ligands. The magnetic and photocatalytic properties were investigated. The variable-temperature magnetic susceptibilities indicate that weak ferromagnetic interactions exist between two adjacent Ni(II) ions of 2, while the other compounds show antiferromagnetic exchange interactions. All of them could accelerate the degradation rate of MO under visible light irradiation, especially compound 2.
引用
收藏
页码:17991 / 18000
页数:10
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