异金属膦酸铀的合成、晶体结构和荧光性质  

Heterometallic uranyl sulfophosphonates:Synthesis,crystal structures,and fluorescence properties

作　　者：侯晓敏[1] 唐斯甫 HOU Xiao‑Min;TANG Si‑Fu(College of Life Science,Qingdao Agricultural University,Qingdao,Shandong 266109,China;College of Chemistry and Pharmaceutical Sciences,Qingdao Agricultural University,Qingdao,Shandong 266109,China)

机构地区：[1]青岛农业大学生命科学学院,青岛266109 [2]青岛农业大学化学与药学院,青岛266109

出　　处：《无机化学学报》2023年第4期746-752,共7页Chinese Journal of Inorganic Chemistry

基　　金：山东省自然科学基金(No.ZR2020MB015);青岛农业大学高层次人才项目(No.663/1118024)资助。

摘　　要：构建异金属膦酸铀仍然具有挑战性。在本工作中,从苯磺酰甲基膦酸二乙酯(Et2L)出发,成功合成了一系列同构的异金属膦酸铀化合物[UO_(2)M(L)_(2)(H_(2)O)_(4)],其中M=Mn(1)、Co(2)、Ni(3)、Zn(4)、Cd(5)。晶体结构研究表明,磺酰基团没有与金属离子配位,而膦酸基团完全去质子化,连接2个铀酰离子和1个过渡金属离子,形成了二维层状晶体结构。荧光研究表明,在Mn(Ⅱ)、Co(Ⅱ)和Ni(Ⅱ)离子存在时,铀酰离子的特征荧光发射被猝灭,而在Zn(Ⅱ)和Cd(Ⅱ)离子存在时,显示出强的特征荧光发射。It is still a great challenge to construct heterometallic uranyl phosphonates.In this work,a series of isostructural heterometallic uranyl sulfophosphonates,namely[UO_(2)M(L)_(2)(H_(2)O)4],where M=Mn(1),Co(2),Ni(3),Zn(4),Cd(5)and Et2L=diethyl((phenylsulfonyl)methyl)phosphonate,have been successfully synthesized and systematically characterized.The sulfonyl group is not involved in coordination with the metal centers,whereas the phosphonate group is fully deprotonated and connects with two uranyl cations and one transition metal ion,affording a 2D layered crystal structure.It was found that the luminescent emission was almost totally quenched in the presence of Mn(Ⅱ),Co(Ⅱ),and Ni(Ⅱ),whereas showed strong emissions in the presence of Zn(Ⅱ) and Cd(Ⅱ)􀃭.

关 键 词：铀酰 膦酸盐 晶体结构 荧光 

分 类 号：O614.71[理学—无机化学]