Abstract:
Two novel metal-organic complexes Zn(tdc)(m-bix)H
2O)
n (1) and Co
5(btx)
2(NDC)
4(μ
3-OH)
2(H
2O)
2n (2) (H
2tdc=2,5-thiophenedicarboxylic acid, m-bix=1,3-bis (imidazol-1-ylmethyl)-benzene, btx=1,4-bis(1,2,4-triazol-1-ylmethyl) benzene, H
2NDC=1,4-naphthalenedicarboxylic acid) have been hydrothermally synthesized. The structure was characterized by techniques of single-crystal X-ray diffraction analysis, elemental analysis, powder X-ray diffraction, infrared spectra, revealing that complex
1 exhibited 4-connected 2D layer structure with the point symbol of 4
4·6
2, which extended into 3D supramolecular network by means of hydrogen bonds. While complex
2 featured a rare 3D 10-connected framework with the symbol of 3
6·4
34·5
3·6
2 based on the pentanuclear Co
5(μ
3-OH)
2(COO)
8 secondary building unit. In addition, photoluminescence investigations revealed that complex
1 has emission peaks at 565 nm and 605 nm, which can be used as a potential fluorescent material. Furthermore, magnetic analyses indicated that complex
2 showed weakly antiferromagnetic coupling between the Co(II) ions and the magnetic susceptibility datas were rationally fitted with
Tθ=−3.3 K.