| 以[α-P2W18O62]6-阴离子为构筑块的一维链状稀土配位聚合物[Nd(DMF)6(H2O)2][Nd(DMF)6(H2O)]P2W18O62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-P2W18O62]6- Cluster [Nd(DMF)6(H2O)2][Nd(DMF)6(H2O)]P2W18O62 |
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| 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=1.899 1(3) nm，b=2.204 7(3) nm，c=2.644 8(4) nm，β=102.272(3)°，并有Z=4，R1=0.043 8，wR2=0.110 7。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。 |
| 关键词: Dawson结构 晶体结构 稀土离子 |
| 基金项目: |
| Abstract: 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. |
| Keywords: Dawson structure crystal structure rare earth ion |
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| 刘迎红,任 请,马建茹,王敬平.以[α-P2W18O62]6-阴离子为构筑块的一维链状稀土配位聚合物[Nd(DMF)6(H2O)2][Nd(DMF)6(H2O)]P2W18O62的合成﹑结构及性质研究[J].无机化学学报,2007,23(8):1322-1328. |
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