论文部分内容阅读
以Nd2O3,DMF和α-H6P2W18O62·nH2O等为原料合成了Dawson结构杂多阴离子有机-无机配位聚合物[Nd(DMF)6(H2O)2][Nd(DMF)6(H2O)]P2W18O62,并对其进行了IR,UV光谱表征及电化学性质研究。X-射线衍射单晶结构分析结果表明,晶体属单斜晶系,Cc空间群,晶胞参数:a=1.8991(3)nm,b=2.2047(3)nm,c=2.6448(4)nm,β=102.272(3)°,并有Z=4,R1=0.0438,wR2=0.1107。聚合物中存在2种构型的Nd配离子,Nd(1)以九配位的三加冠三棱柱结构通过端氧与[P2W18O62]6-阴离子赤道位的W相连,Nd(2)以九配位畸变的单加冠四方反棱柱结构通过端氧与[P2W18O62]6-阴离子极位的W相连,从而构成分子结构单元[{Nd(DMF)6(H2O)2}{Nd(DMF)6(H2O)}(P2W18O62)],毗邻的结构单元又通过W-O-Nd(1)-O-W桥联形成一维锯齿无限链状结构。
Dawson structure heteropolyanion organic-inorganic coordination polymer [Nd (DMF) 6 (H2O) 2] [Nd (DMF) 6 (H2O)] P2W18O62 was synthesized from Nd2O3, DMF and α-H6P2W18O62 · nH2O. Their IR, UV spectra and electrochemical properties were also studied. X-ray diffraction analysis of single crystal structure shows that the crystal belongs to the monoclinic Cc space group with a = 1.8991 (3) nm, b = 2.2047 (3) nm and c = 2.6448 β = 102.272 (3) °, with Z = 4, R1 = 0.0438, wR2 = 0.1107. There are two kinds of Nd doping ions in the polymer. Nd (1) is connected to W at the equatorial position of 6-anions of [P2W18O62] 6 via a triple-crown triangular prism with a nine- The monodisperse tetragonal anti-prism structure of the position distortion is connected to the W of the 6-anions of [P2W18O62] 6 by the terminal oxygen to form the molecular structure unit [{Nd (DMF) 6 (H2O) 2} {Nd )} (P2W18O62)], the adjacent structural units in turn through the WO-Nd (1) -OW bridge to form a one-dimensional zigzag infinite chain structure.