首页> 外文期刊>International Journal of Quantum Chemistry >Synthesis, crystal structures and luminescence properties of the Eu3+-doped yttrium oxotellurates(IV) Y2Te4O11 and Y2Te5O13
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Synthesis, crystal structures and luminescence properties of the Eu3+-doped yttrium oxotellurates(IV) Y2Te4O11 and Y2Te5O13

机译:掺杂Eu3 +的Y2Te4O11和Y2Te5O13含氧钇金属钇(IV)的合成,晶体结构和发光性能

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Y2Te4O11:Eu3+ and Y2Te5O13:Eu3+ single crystals in sub-millimeter scale were synthesized from the binary oxides (Y2O3, Eu2O3 and TeO2) using CSCl as fluxing agent. Crystallographic Structures of the undoped yttrium oxotellurates(W) Y2Te4O11 and Y2Te5O13 have been determined and refined from single-crystal X-ray diffraction data. In Y2Te4O11, a layered structure is present where the reticulated sheets consisting of edge-sharing [YO8](13) polyhedra are interconnected by the oxotellurate(IV) units, whereas In Y2Te5O13 Only double chains of condensed yttrium-oxygen polyhedra with coordination numbers of 7 and 8 are left, now linked in two crystallographic directions by the oxotellurate(IV) entities. The Eu3+ luminescence spectra and the decay time from different energy levels of the doped compounds were investigated and all detected emission levels were identified. Luminescence properties of the Eu3+ cations have been interpreted in consideration of the flow accessible detailed crystallographic data of the yttrium compounds, providing the possibility to examine the influence of the local symmetry of the oxygen coordination spheres. (C) 2008 Elsevier Inc. All rights reserved.
机译:使用CSCl作为助熔剂,由二元氧化物(Y2O3,Eu2O3和TeO2)合成了亚毫米级的Y2Te4O11:Eu3 +和Y2Te5O13:Eu3 +单晶。已从单晶X射线衍射数据确定并精制了未掺杂的含氧碲酸钇(W)Y2Te4O11和Y2Te5O13的晶体结构。在Y2Te4O11中,存在一种层状结构,其中由边共享[YO8](13)多面体组成的网状片通过氧tellurate(IV)单元相互连接,而在Y2Te5O13中,只有缩合的钇-氧多面体的双链配位数为剩下的是7和8,现在由两个金属氧酸酯(IV)实体沿两个晶体学方向链接。研究了掺杂化合物不同能级的Eu3 +发光光谱和衰变时间,并确定了所有检测到的发射能级。考虑到钇化合物的可流动获取的详细晶体学数据,已经解释了Eu3 +阳离子的发光特性,从而提供了检查氧配位球局部对称性影响的可能性。 (C)2008 Elsevier Inc.保留所有权利。

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