Synthesis, Structures and Properties of Three New Compounds Based on Multidentate Ligand Containing Triazole and Pyrimidine

doi:10.1007/s40242-015-5051-0

Abstract

Abstract:

Three new compounds, namely, [Zn(mtpo)₂(H₂O)4](1), [Cd(mtpo)₂·CH₃CH₂OH]_n(2) and [Mn(mtpo)₂·CH₃CH₂OH]_n(3)(Hmtpo=4,7-dihydro-5-methyl-7-oxo-[1,2,4]triazolo[1,5-a]pyrimidine), have been synthesized via hydrothermal or solvothermal methods and characterized by means of elemental analyses, Fourier transform infrared(FTIR) spectroscopy, powder X-ray diffraction(PXRD), thermogravimetric analysis(TGA) and single-crystal X-ray diffraction. The results obtained from the single-crystal X-ray diffraction indicate that compound 1 has a mononuclear structure, and crystallizes in a monoclinic crystal system with P2₁/c space group, which exhibits a 2D supramolecular network constructed by hydrogen bonds and π-π interactions. Compounds 2 and 3 are isomorphous and crystallize in a tetragonal system with space group of I4₁/a. The M²⁺(M=Cd, Mn) ions in compounds 2 and 3 have the octahedral coordination geometry. Hmtpo acts as a bridging ligand linking the metal ions to form an infinite 3D framework with 4-connected {4²·8⁴} topology. There are hydrogen bonds between the guest ethanol molecules and the mtpoligands, which make the ethanol molecules exist in a 3D framework. In addition, luminescent properties of compounds 1 and 2 as well as magnetic property of compound 3 were investigated and water vapor adsorption and nitrogen sorption for compounds 2 and 3 were researched at 298 and 77 K, respectively.

Key words: Metal-organic framework(MOF), Hydrogen bond, Luminescent property, Magnetic property, Water vapor sorption, Nitrogen sorption

LÜ Lei, MU Bao, LI Na, HUANG Rudan. Synthesis, Structures and Properties of Three New Compounds Based on Multidentate Ligand Containing Triazole and Pyrimidine[J]. Chemical Research in Chinese Universities, doi: 10.1007/s40242-015-5051-0.

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