论文部分内容阅读
The reaction of Pr(Ⅲ) salt with 1,2,4,5-benzenetetracarboxylic acid(H_4betc) and piperazine(pip) yielded a lanthanide metal-organic framework {[Pr(betc)(H_2O)_2](H_2pip)0.5}n(1)under hydrothermal conditions. Compound 1 was characterized by single-crystal X-ray structural analysis, elemental analysis, IR, X-ray powder diffraction, and thermal gravimetric. Compound 1crystallizes in monoclinic, space group P21/n with a = 11.023(5), b = 11.109(5), c = 11.456(5) ?, β = 110.065(5)°, V = 1317.7(9) ?~3, M_r = 471.14, Z = 4, F(000) = 920, D_c = 2.375 g/cm~3, μ(Mo Kα) = 3.761 mm-1, the final R = 0.0286 and w R = 0.0821(I > 2σ(I)). Compound 1 exhibits a 2D network with(4, 4) topology, and a 3D supramolecular framework formed by hydrogen-bonding interactions. The proton conductivity of compound 1 has been investigated at ~97% relative humidity and different temperature.
The reaction of Pr (Ⅲ) salt with 1,2,4,5-benzenetetracarboxylic acid (H_4betc) and piperazine (pip) yielded a lanthanide metal-organic framework {[Pr (betc) (H_2O) _2] Compound 1 was characterized by single-crystal X-ray structural analysis, elemental analysis, IR, X-ray powder diffraction, and thermal gravimetric. Compound 1crystallizes in monoclinic, space group P21 / n with a = 11.023 (5), b = 11.109 (5), c = 11.456 (5), β = 110.065 (5) °, V = 1317.7 (9)? ~ 3, M_r = 471.14, Z = 4, = 1, the final R = 0.0286 and w R = 0.0821 (I> 2σ (I)). Compound 1 exhibits a 2D network with ( 4, 4) topology, and a 3D supramolecular framework formed by hydrogen-bonding interactions. The proton conductivity of compound 1 has been investigated at ~ 97% relative humidity and different temperature.