报道了具有1,2,4-三唑基苯甲酸酯配体的锌和钴配位网络的两个同构系列的合成和固态NMR表征。这两个系列均包含具有四重互穿的3D菱形网络。固态NMR标识配体的金属配位,和所有的分配1 H和13 C ^移位通过组合使能13 Ç编辑,FSLG-HETCOR光谱,和图2D 1 H- 1个ħ回到后端( BABA光谱,并根据NMR-CASTEP计算得出结果。掺入Co 2+代替Zn 2+在整个浓度范围内,MOF中的离子对NMR光谱都有重大影响。基于1 H T 1弛豫时间测量的分析,记录了金属离子的均匀分布。
material is unavailable. 113Cd solid‐state NMR is easy to measure and is a highly sensitive probe because the coordination number, the nature of coordinating groups, and the geometry around the metal ion is reflected by the isotropic chemical shift and the chemical‐shift anisotropy. Here, a detailed investigation of a series of 27 cadmium coordination polymers by 113Cd solid‐state NMR is reported. The results
Halogeno(triazolyl)zinc complexes as molecular building blocks for metal–organic frameworks
作者:Jörg Lincke、Daniel Lässig、Harald Krautscheid
DOI:10.1107/s010827010904668x
日期:2009.12.15
The isomorphous title complexes, dichlorido[4-(3,5-dimethyl-4H-1,2,4-triazol-4-yl) benzoic acid-kappa N(1)]zinc(II) dihydrate, [ZnCl(2)(C(11)H(11)N(3)O(2))(2)]center dot 2H(2)O, and dibromido[4-(3,5-dimethyl-4H-1,2,4- triazol-4-yl) benzoic acid-kappa N(1)]zinc(II) dihydrate, [ZnBr(2)(C(11)H(11)N(3)O(2))(2)]center dot 2H(2)O, were synthesized and crystallized by slow evaporation of the solvent from a solution of the ligand and either zinc chloride or zinc bromide, respectively, in water/ethanol. The Zn(II) ions occupy twofold axes in the noncentrosymmetric orthorhombic space group Fdd2. The metal ion is approximately tetrahedrally coordinated by two monodentate triazole groups of the ligands and additionally by two halide ions. The water molecules incorporate the complexes into a three-dimensional framework made up by hydrogen bonds. Furthermore, each complex possesses two hydrogen-bond-donor sites represented by the carboxy groups and two acceptor sites at the noncoordinating N atoms of the triazoles.
Highly functionalised 3,4,5-trisubstituted 1,2,4-triazoles for future use as ligands in coordination polymers
作者:Daniel Lässig、Jörg Lincke、Harald Krautscheid
DOI:10.1016/j.tetlet.2009.11.098
日期:2010.1
An optimised synthesis of 3,4,5-trisubstituted 1,2,4-triazoles, that can be used as linkers for metal organic frameworks (MOFs), is described. The substituents in 3- and 5-position of the triazole have a significant impact on the torsion angles between the aromatic rings and therefore influence on solubility and coordination behaviour of these ligands.
Synthesis and solid-state NMR characterization of two isomorphous series of zinc and cobalt coordination networks with 1,2,4-triazolyl benzoate ligands are reported. Both series consist of 3D diamondoid networks with four-fold interpenetration. Solid-state NMR identifies the metal coordination of the ligands, and assignment of all 1H and 13C shifts was enabled by the combination of 13C editing, FSLG-HETCOR
报道了具有1,2,4-三唑基苯甲酸酯配体的锌和钴配位网络的两个同构系列的合成和固态NMR表征。这两个系列均包含具有四重互穿的3D菱形网络。固态NMR标识配体的金属配位,和所有的分配1 H和13 C ^移位通过组合使能13 Ç编辑,FSLG-HETCOR光谱,和图2D 1 H- 1个ħ回到后端( BABA光谱,并根据NMR-CASTEP计算得出结果。掺入Co 2+代替Zn 2+在整个浓度范围内,MOF中的离子对NMR光谱都有重大影响。基于1 H T 1弛豫时间测量的分析,记录了金属离子的均匀分布。