- Synthesis, structure and properties of a nickel coordination polymer with 3D supramolecular framework
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One nickel coordination polymer with 3D supramolecular framework based on 5-(imidazol-1-ylmethyl) isophthalic acid (H2L) as a main ligand and 1,2-bis(4-pyridyl) ethene (bpe) as a N-containing ancillary ligand, {[NiL(bpe)(H2O)] (H2O)3}n(1), has been obtained by hydrothermal synthesis and characterized by powder X-ray diffraction (PXRD), UV/vis, IR, elemental analysis, thermal gravimetric analysis (TGA) and single-crystal XRD. It crystallizes in the monoclinic, space group P21/c. In 1, L2- anions connect Ni(II) ions forming 2D layers (Ni3L3)n and then adjacent layers are further associated together by π π interaction leading to double layers, which are formed by the neighboring imidazolyl group. Meanwhile, hydrogenbonding interactions between layers extend these double layers into 3D supramolecular network.
- Li, Fu-An,Yang, Wei-Chun,Li, Song-Tian,Miao, Xu
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- Structural diversity in imidazole and carboxylate-containing metal complexes dependent on the alkaline reagents
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Three cadmium-organic frameworks [Cd(L)(DMF)(H2O)]·H 2O (1), [Cd(L)(H2O)2]2· 5H2O (2) and [Cd2(L)2(H2O) 2]2·H2O (3) and two zinc complexes [Zn(L)] (4) and [Zn(L)(H2O)] (5) [H2L = 5-(imidazol-1-ylmethyl)isophthalic acid, DMF = N,N-dimethylformamide] have been synthesized and characterized by single crystal X-ray structure determination, IR, elemental analysis, and powder X-ray diffraction. Both these two series of complexes exhibit structural diversity, which was controlled by non-innocent alkaline reagents. Within the cadmium series, the in situ generated dimethylamine from DMF, NaOH and carbonate salt were utilized as the basic reagents for the syntheses of 1, 2 and 3, respectively. As a result, 1 has a 1D ladder structure, 2 is a uninodal 3-connected 2D (63) network and 3 displays a binodal (3,6)-connected 3D framework with (4.62) 2(42.610.83) topology. Within the zinc series, tetrabutylammonium hydroxide and carbonate salt were used for the syntheses of 4 and 5, respectively. 4 showed a binodal (3,6)-connected 2D kgd net with [(43)2(46.66.8 3)] topology; while 5 is a 2-fold interpenetrated 3D (10, 3)-a architecture. The adsorption and luminescent properties of the complexes were investigated.
- Kuai, Hai-Wei,Fan, Jian,Liu, Qing,Sun, Wei-Yin
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