有机杂化锑基主族异金属硫属化物的研究进展

本文综述了有机杂化锑基主族异金属硫属化物的研究进展,对它们的结构和异金属次级结构基元进行了描述、归类和总结;探讨了有机组分分别作为结构导向剂和配体两种角色所起到的不同作用;介绍了这类化合物在离子交换、光催化性能方面的研究;展望了该体系的发展趋势。     

有机杂化锑基主族异金属硫属化物的研究进展

本文综述了有机杂化锑基主族异金属硫属化物的研究进展, 对它们的结构和异金属次级结构基元进行了描述、归类和总结;探讨了有机组分分别作为结构导向剂和配体两种角色所起到的不同作用;介绍了这类化合物在离子交换、光催化性能方面的研究;展望了该体系的发展趋势。     

Ionothermal Synthesis and Characterization of a New Selenidomercurate

A new selenidomercurate compound, namely(bmmim)2Hg(Se4)2(1, bmmim = 1-butyl-2,3-dimethylimidazolium), has been ionothermally synthesized by the reaction of HgSe, Sb and Se in a mixed solvent of the ionic liquid of(bmmim)Cl and methylamine aqueous solution. The(bmmim)Cl acted as an efficient structure-directing agent(SDA) and reactive solvent in the formation of 1. Single-crystal X-ray diffraction study reveals that 1 crystallizes in the monoclinic space group C2/c with a = 17.9540(10), b = 10.8863(5), c = 16.4728(9) ?, β = 110.024(2)°, V = 3025.0(3) ?3, Z = 4, D-1 c = 2.500 mg·m-3, F(000) = 2088, μ = 14.729 mm, R = 0.0186 and wR = 0.0503(I 2σ(I)). The structure of compound 1 features a bamboo dragonfly-like anion unit of [Hg(Se4)2]2-in which the Hg atom binds to two(Se4)2-groups to form two five-membered rings. The thermal stability and optical property of compound 1 were also investigated.     

Synthesis and Crystal Structure of a Magnesium Metal-organic Framework

A magnesium metal organic framework, [NH2(CH3)2][N(CH3)4][Mg5(bpdc)3(O2CH)6]· 3H2O (1, bpdcH2 = 4,4′-biphenyldicarboxylic acid), has been solvothermally synthesized and structurally characterized. 1 crystallizes in the trigonal system, space group R-3, with a = 11.3427(3), c = 41.5662(18) , V = 4631.3(3) 3, Z = 3 and the final R = 0.0457. Its structure features a pillared-layered three-dimensional network with 8.21  cavities, in which cationic [NH2(CH3)2]+ or [N(CH3)4]+ and lattice water molecules are located. Thermal stability of the title compound has also been investigated.     

两例新的镧系金属-有机框架化合物高效去除Cs+离子研究※

¹³⁷Cs具有强放射性和较长半衰期, 一旦从核废液中泄露将对人类健康和环境造成很大危害. 由于¹³⁷Cs⁺的高溶解性、易迁移性和废液中干扰离子的影响, 从复杂的放射性废液中有效去除¹³⁷Cs⁺仍然是一个挑战. 本研究通过溶剂热法合成了两例新的三维微孔镧系金属-有机框架化合物(Me₂NH₂)_0.5(H₃O)_0.25Na_0.25Ln(OH)(stp)•0.25H₂O (FJSM-LnMOF; Ln=Eu, Tb; H₃stp=2-磺酸基对苯二甲酸), 它们具有良好的水稳定性和一定的耐酸碱性. FJSM-EuMOF和FJSM-TbMOF对Cs⁺离子吸附具有快速的动力学和高的吸附量(q_m^Cs分别为229.25和211.28 mg/g). 它们对Cs⁺离子具有良好的选择性(K_d^Cs值高达2.18×10³ mL/g). 即使在Na⁺, K⁺, Mg²⁺, Ca²⁺离子干扰的情况下, 它们仍然表现出对Cs⁺离子的选择性吸附性能. 我们成功获得了Cs⁺吸附产物的单晶结构, 通过单晶结构分析结合X射线光电子能谱(XPS), 红外(IR), 扫描电镜能量色散谱(EDS)和元素分析(EA)等多种表征方法, 证实了FJSM-EuMOF对Cs⁺离子的吸附为离子交换的机理. 结果表明, FJSM-EuMOF对Cs⁺离子的高效吸附主要源于镧系金属-有机阴离子框架中有机配体上的 COO^–和 $\text{SO}_{3}^{}$官能团对Cs⁺离子强的作用力以及通道内存在易交换的[Me₂NH₂]⁺阳离子和[H₃O]⁺离子. 这项工作表明, 镧系金属-有机框架化合物在放射性铯的修复中具有潜在的应用价值.     

Magnetic Property of a Three-dimensional Copper Metal-organic Framework

A copper metal-organic framework(MOF) compound based on 2,5-thiophenedicarboxylic acid(H_2 TDC) ligand, namely Cu(TDC)(H_2 O)?DMA(1, DMA = N,N?-dimethylacetamide), has been synthesized in gram-scale via a one-pot solvothermal route in a high yield of 81.3%. Single-crystal X-ray analysis reveals that the structure of 1 features a three-dimensional(3D) open framework constructed by TDC interconnecting 1D chains of [-Cu(COO)(H_2 O)Cu-]_n. Thermal property was investigated by TG-MS. The magnetic measurements indicate the existence of weak antiferromagnetic interactions between the Cu~(2+) centers in 1.