Structural Tuning and Sensitization of Uranyl Phosphonates by Incorporation of Countercations into the Framework
作者:Si-Fu Tang、Xiaomin Hou
DOI:10.1021/acs.inorgchem.8b02904
日期:2019.1.22
By the introduction of terephthalic acid, tetramethylammonium chloride, and Zn2+ ions, three new uranyl triphosphonates with varying crystal structures, namely, [H3O][(UO2)2(HL)]·H2O (1), [NMe4][(UO2)2(HL)(H2O)]·H2O (2), and [(UO2)3Zn(H2L)2(H2O)2]·3H2O (3), where H6L = benzene-1,3,5-triyltris(methylene) triphosphonic acid, have been successfully synthesized and characterized by means of powder and
通过引入对苯二甲酸,四甲基氯化铵和Zn 2+离子,形成了具有不同晶体结构的三种新的铀酰三膦酸酯,即[H 3 O] [(UO 2)2(HL)]·H 2 O(1), [NMe 4 ] [(UO 2)2(HL)(H 2 O)]·H 2 O(2)和[(UO 2)3 Zn(H 2 L)2(H 2 O)2 ]·3H 2 O(3),其中H 6L =苯-1,3,5-三基三(亚甲基)三膦酸已成功合成并通过粉末和单晶XRD,IR,EA,TGA,UV-vis和发光表征。这三种化合物均具有三维构架结构,其中氢,四甲基铵和Zn 2+为各自的抗衡阳离子。化合物1和2的铀(VI)中心发光被完全淬灭。但是,在化合物3的情况下,将Zn 2+掺入到铀酰膦酸酯的基质中导致U(VI)发生典型的强振动发射,表明膦酸锌可充当铀酰膦酸酯的敏化剂。还讨论了猝灭和敏化机理。