Bouquet-like uranium-containing selenotungstate consisting of two different Keggin-/Anderson-type units with excellent photoluminescence quantum yield

作     者：Mengyuan Cheng Haiying Wang Yufeng Liu Jingwen Shi Mingqi Zhou Weixin Du Dongdi Zhang Guoping Yang Mengyuan Cheng;Haiying Wang;Yufeng Liu;Jingwen Shi;Mingqi Zhou;Weixin Du;Dongdi Zhang;Guoping Yang

作者机构：Henan Key Laboratory of Polyoxometalate ChemistryCollege of Chemistry and Chemical EngineeringHenan UniversityKaifeng 475004China Jiangxi Province Key Laboratory of Synthetic ChemistryJiangxi Key Laboratory for Mass Spectrometry and InstrumentationEast China University of TechnologyNanchang 330013China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2023年第34卷第1期

页      面：198-202页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学] 

基　　金：supported by the National Natural Science Foundation of China(Nos.22071045 and 22001034) Excellent Youth Science Fund Project of Henan Province(No.202300410042) the Open Fund of the Jiangxi Province Key Laboratory of Synthetic Chemistry(No.JXSC202008) the start-up fund for Distinguished Professor of Henan University 

主　　题：Polyoxometalates Selenotungstates Uranium Synthesis Photoluminescence 

摘      要：We present the synthesis,characterization and photoluminescence properties of uranium-containing selenotungstate,[(UO_(2))_(3)(SeO_(3))_(3)Na_(5)(H_(2)O)_(6)(SeW_(6)O_(21))(SeW_(9)O_(33))_(3)]^(21–),which was isolated by a one-pot reaction of uranium nitrate with sodium tungstate and sodium selenite in a pH 5.2 aqueous solution at 90°*** this study,the effect of the introduction of lone-electron pair containing heteroatoms on the structure is demonstrated,a three-layered heterometallic{Se_(3)U_(3)Na_(5)}cluster is encapsulated by two different anionic building block units:three trivacant Keggin{B-α-Se W_(9)O_(33)}and one Anderson{SeW_(6)O_(21)}.To our knowledge,the{Se_(3)U_(3)Na_(5)}cluster has never been observed in the polyoxometalate *** solidstate photoluminescence properties and lifetime decay behaviours of the title compound(1)have been measured at room temperature,and the photoluminescence spectrum displays the characteristic emission bands of corresponding uranyl *** addition,the photoluminescence quantum yield of 1 is 72%,which is almost three times that of starting material UO_(2)(NO_(3))_(2)·6H_(2)O(27%).By using this strategy,we envision that an increasing number of assemblies with‘open’clusters may be designed and obtained,in which the exposed oxygen atoms show strong affinity towards metal ions,providing new opportunities to generate bigger clusters or to tune existing properties.