以[α-P_2W_(18)O_(62)]^(6-)阴离子为构筑块的一维链状稀土配位聚合物[Nd(DMF)_6(H_2O)_2][Nd(DMF)_6(H_2O)]P_2W_(18)O_(62)的合成﹑结构及性质研究  

Synthesis,Characterization and Crystal Structure of A 1D Linear Chain Rare Earth Coordination Compound Supported by [α-P_2W_(18)O_(62)]^(6-) Cluster [Nd(DMF)_6(H_2O)_2][Nd(DMF)_6(H_2O)]P_2W_(18)O_(62)

作　　者：刘迎红[1] 任请[1] 马建茹[1] 王敬平[1] 

机构地区：[1]河南大学化学化工学院,分子与晶体工程研究所,开封475001

出　　处：《无机化学学报》2007年第8期1322-1328,共7页Chinese Journal of Inorganic Chemistry

基　　金：河南省高校新世纪优秀人才支持计划(No.2005HANCET-02);河南省自然科学基金;河南省高校青年骨干教师培养计划;河南大学校重点基金(No.05ZPZR002)资助。

摘　　要：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。　An organic-inorganic polymer of [Nd（DMF）6（H2O）2][Nd（DMF）6（H2O）]P2W18O62 was synthesized by reaction of Nd2O3,DMF,HClO4 and α-H6P2W18O62·nH2O in water and characterized by IR,UV,electrochemistry and single-crystal X-ray diffraction. The crystal of the title compound belongs monoclinic,space group Cc,with lattice constants： a=1.899 1（3） nm,b=2.204 7（3） nm,c=2.644 8（4） nm,β=102.272（3）°,and Z=4,R1=0.042 5,wR2=0.104 5. The crystal structure reveals that Nd（1）^3＋ complex ion is nine-coordinated with a tricapped trigonal prismatic envi-ronment,which is combined with the heteropolyanion by terminal oxygen atom,whereas Nd（2）^3＋ complex ion is also nine-coordinated with a distorted monocapped square antiprismatic environment,which is linked to the hetero-polyanion by terminal oxygen atom. Adjacent structure units of [{Nd（DMF）6（H2O）2}{Nd（DMF）6（H2O）}（P2W18O62）] are bridged through W-O-Nd（1）-O-W links to form one-dimensional linear chain.CCDC： 629927.

关 键 词：DAWSON结构 晶体结构 稀土离子 

分 类 号：O614.522[理学—无机化学] O614.613[理学—化学]