二维网状配位聚合物[Cu(tza)_2]_n的合成、晶体结构及电化学性质

采用水热合成法制备了Cu(II)的二维网状聚合物[Cu(tza)2]n(Htza=四氮唑乙酸)的晶体.X射线衍射单晶结构表明:该配合物属单斜晶系,空间群P2(1)/c,a=0.47974(5)nm,b=1.17811(12)nm,c=0.94739(10)nm,β=103.727(2)°,V=0.52016(9)nm3,Dc=1.578g·cm-3,F(000)=357,Z=2,μ(MoKα)=1.057mm-1,R1=0.0128,wR2=0.142.中心Cu(II)与配体形成近似菱形结构,测定了该配合物在DMF溶液中的电化学性质,循环伏安法表明该配合物存在较好的氧化还原性,其氧化峰、还原峰的峰电位分别为0.29、-0.20V,其是Cu(II)和Cu(I)之间的相互转化.

Synthesis, crystal structure and electrochemical properties of 2D network polymer of [Cu(tza)2]n

A 2D grid polymer[Cu(tza) 2]n(Htza = tetrazole-1-acetic acid ) has been prepared by hydrothermal synthesis and characterized by X-ray diffraction analysis.It crystallized in the monoclinic system,space group P 2(1) /c,with a = 0.479 74(5) nm,b = 1.178 11(12) nm,c = 0.947 39(10) nm,β =103.727(2) °,V =0.520 16(9) nm3,Dc = 1.578 g·cm-3,F(000) = 357,Z = 2,μ(MoKα) = 1.057 mm-1,and R1 = 0.012 8,wR2 = 0.142.The X-ray crystal structure analysis revealed that the center Cu(Ⅱ) cation was bonded to two nitrogen atoms and two oxygen atoms to form a diamond geometry.The electrochemical properties were studied in DMF with an electrochemical analyzer with Epc = 0.29 V,Epa =-0.20 V,which is belong to Cu(Ⅱ) and Cu(I) .