Synthesis,structure and dielectric properties of a novel Gd coordination polymer based on 2-(pyridin

• 作 者: Li-Zhuang Chen Deng-Deng Huang
• 机 构: School of Biology and Chemical Engineering,Jiangsu University of Science and Technology,
• 出 处: Chinese Chemical Letters
• 发表日期: 2014年02期
• 关键词: imidazole dielectric hydrothermal monoclinic shaped connected formulated carboxy

A new Gd coordination polymer based on 2-(pyridin-4-yl)-1H-imidazole-4,5-dicarboxylate(H_3PIDC) has been synthesized under hydrothermal conditions,formulated as {[Gd_3(HPIDC)_3(PIDC)(H_2O)_4]·3H_2O}_n(1).The compound crystallizes in the monoclinic system,space group C2/c with a=20.951(7),b=9.515(3),c=27.483(10) A,β=106.176(6)°,Z=4.V=5262(3) A~3,C_(40)H_(45)Gd_3N_(12)O_(30).D_c= 2.071 g/cm~3,M_r=645.63,λ(MoKa)=0.71073A,μ=3.846mm~(-1),F(000)=3204,the final R=0.0390 and wR=0.1332.Complex 1 is a two-dimensional MOF built up from T-shaped 3-connected HPIDC~(2-),PIDC~(3-) and 4-connected metal nodes.Dielectric constant of complex 1 was measured at different frequencies with temperature variation.

A new Gd coordination polymer based on 2- (pyridin-4-yl) -1H-imidazole-4,5-dicarboxylate (H_3PIDC) has been synthesized under hydrothermal conditions, formulated as {[Gd_3 (HPIDC) _3 (PIDC) ) _4] · 3H_2O} _n (1). The compound crystallizes in the monoclinic system with space group C2 / c with a = 20.951 (7), b = 9.515 (3), c = 27.483 (10) A, (6) °, Z = 4.V = 5262 (3) A ~ 3, C 40 H 45 Gd 3N 12 O 30 D c 2.071 g / cm 3 M λ = 645.63 λ (MoKa) = 0.71073A, μ = 3.846 mm -1, F (000) = 3204, the final R = 0.0390 and wR = 0.1332. Complex 1 is a two-dimensional MOF built from T-shaped 3- connected HPIDC ~ (2 -), PIDC ~ (3-) and 4-connected metal nodes. Dielectric constant of complex 1 was measured at different frequencies with temperature variation.