3, 4-二乙氧基苯甲酸与2, 2'-联吡啶三元稀土配合物的合成、晶体结构及热化学性质

doi:10.3866/PKU.WHXB201605263

Abstract

Abstract:

Two novel ternary rare earth complexes [Ln(3, 4-DEOBA)₃DIPY]₂DIPY (Ln=Er (1), Gd (2); 3, 4-DEOBA=3, 4-diethoxybenzoate; DIPY=2, 2'-bipyridine) were synthesized and characterized by elemental analysis, infrared spectroscopy and X-ray single crystal diffraction. The experiments show that the two complexes are isomorphous with dinuclear structures, and adjacent structure units are stitched together through π-π interactions to form 1D chains and 2D-layered supramolecular structures. Simultaneous thermal analysis and Fourier transform infrared detection (TG-FTIR) was used to study the process of the thermal decomposition of the complexes. The molar heat capacity of the two complexes was obtained by differential scanning calorimetry (DSC). The smoothed values of the average molar heat capacity and thermodynamic functions of the complexes were calculated by the fitted polynomial and thermodynamic equations.

Key words: 3, 4-Diethoxybenzoic acid, 2, 2'-Bipyridine, Rare earth complex, Thermal decomposition mechanism, Molar heat capacity, Thermochemical property

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Cheng-Wei JIN,Ye WANG,Su-Ling XU,Jian-Jun ZHANG. Synthesis, Crystal Structures and Thermochemical Properties of Ternary Rare Earth Complexes Based on 3, 4-Diethoxybenzoic Acid and 2, 2'-Bipyridine[J]. Acta Phys. -Chim. Sin. 2016, 32(9), 2232-2240. doi: 10.3866/PKU.WHXB201605263

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Synthesis, Crystal Structures and Thermochemical Properties of Ternary Rare Earth Complexes Based on 3, 4-Diethoxybenzoic Acid and 2, 2'-Bipyridine

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