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.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
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。
