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The title complexes Ln(DEP),(Ln=La,Sm,Eu,Ho and Yb)were synthesized by reaction of triethylphosphate with trivalent rare earth chlorides.The mechanism of thermo-decomposition of the complexes hasbeen studied.According to their IR spectra,the residues of the thermo-decomposition of the complexes wereidentified as Ln(PO_3)_3.Their IR spectra were measured and principal IR bands were assigned.The experimentalresults of the IR spectra of the complexes show that the title complexes have the same coordination form and mo-lecular configuration as rare earth,e.g.Sm,complex with dimethyl phosphate(Sm(DMP)_3).Each of the rareearth ion links three rare earth ions nearby through double“O-P-O”bridges to form a special network ofrings-linking-rings,each of which consists of twenty-four atoms.The Ln-O bond is principally ionic. 相似文献
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结合我国市政工程施工的现状,简单分析了其在建设中存在的主要问题,并提出了具体的可行性管理对策,以明确加强监管的重要意义,从而保证工程施工的质量安全,为我国建造事业的整体发展奠定坚实的基础。 相似文献
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依据市政工程施工管理多样性、实践性、复杂性、风险性的特点,对市政工程施工中存在的一系列问题进行了分析,阐述了加强其质控及管理机制的措施,以保证市政工程的施工质量,促进人们生活水平的提高。 相似文献
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SynthesisandCrystalStructureofYtterbiumTrichlorideComplexwithProlineMaAi-Zeng(马爱增);LiLai-Ming(李来明);JinSong-Chun(金松春);LinYong-... 相似文献
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