基于萘酰亚胺-寡聚芳酰胺Th(Ⅳ)荧光探针性能研究  

Study on the Performance of Th(Ⅳ)Fluorescent Probe Based on Naphthalimide-derivatized Oligarylamide

作　　者：杨永安 王璞 李双志 王英伍 许肖云 胡艳丽 YANG Yong-an;WANG Pu;LI Shuang-zhi;WANG Ying-wu;XU Xiao-yun;HU Yan-li(College of Environmental Science&Engineering,China West Normal University,Nanchong 637009,China;Suining Eco-environmental Monitoring Centre of Sichuan Province,Suining 629000,China;College of Chemistry&Chemical Engineering,China West Normal University,Nanchong 637009,China)

机构地区：[1]西华师范大学环境科学与工程学院,四川南充637009 [2]四川省遂宁生态环境监测中心站,四川遂宁629000 [3]西华师范大学化学化工学院,四川南充637009

出　　处：《稀土》2024年第4期71-79,共9页Chinese Rare Earths

基　　金：西华师范大学国家级课题培育项目(22kA009);西华师范大学博士科研启动项目(21E032,21E033)。

摘　　要：钍作为一种极为重要的潜在核燃料,如何快速灵敏检测地质、核废料以及环境中钍的浓度,已成当今研究热点,这对社会经济可持续发展、减污降碳以及人类健康等都具有重要的意义。为此,利用含分子内三中心氢键的寡聚芳酰胺三聚体二酸和4-氨基-1.8-萘酰亚胺衍生物的酰胺化反应,高效制备了一种新型荧光探针(NOFP),采用核磁共振谱、质谱等手段对其结构进行了表征。通过分析荧光发射光谱,研究了NOFP的选择性识别、抗干扰以及可逆等性能,并测算了NOFP和Th4+的配位比及检测限。结果显示,NOFP对Th^(4+)展现出高选择性的荧光识别,产生显著的“turn-on”现象,其荧光强度与Th4+浓度(0~1.0×10^(-5)mol·L^(-1))呈较好的线性关系,检测限为7.6×10^(-7)mol·L^(-1),不受常见共生金属离子(La^(3+)、Ce^(3+)、Pr^(3+)、Nd^(3+)、Sm^(3+)、Gd^(3+)、Yb^(3+)、Lu^(3+)、Fe^(3+)、Al^(3+)、Ca^(2+)、Mg^(2+))的干扰,且识别过程具有可逆性。Job′s plot实验测算出NOFP和Th4+的配位比为1∶1,并推断了NOFP选择性荧光识别Th4+的机理。Thorium as a very important potential nuclear fuel,how to quickly and sensitively detect thorium concentration in geology,nuclear waste and environment has become a research hotspot,which is of great significance for sustainable social and economic development,reduce pollution and carbon,and affect human health.Therefore,a novel fluorescence probe(NOFP)was efficiently prepared by amidation of oligarylamide trimer diacid containing intramolecular three-center hydrogen bonding and 4-amino-1.8-naphthalimide derivative.The structure of NOFP was characterized by NMR and MS.Anti-interference and reversible properties of NOFP were studied by analyzing the fluorescence emission spectrum,the selective recognition,and the coordination ratio and limit of detection of NOFP and Th^(4+)were calculated.The results showed that NOFP exhibited highly selective fluorescence recognition of Th^(4+),resulting in a significant“turn-on”phenomenon.The fluorescence intensity of NOFP showed a good linear relationship with Th^(4+)concentration(0^1.0×10^(-5)mol·L^(-1)),and the limit of detection was 7.6×10^(-7)mol·L^(-1).This recognition process is not disturbed by common symbiotic metal ions(eg.La^(3+),Ce^(3+),Pr^(3+),Nd^(3+),Sm^(3+),Gd^(3+),Yb^(3+),Lu^(3+),Fe^(3+),Al^(3+),Ca^(2+),Mg^(2+)),and the recognition process is reversible.Job′s plot experiment calculated that the coordination ratio of NOFP and Th^(4+)was 1∶1,and deduced the mechanism which NOFP selectively fluorescence recognizes Th^(4+).

关 键 词：寡聚芳酰胺 萘酰亚胺 选择性识别 荧光探针 钍离子 

分 类 号：X835[环境科学与工程—环境工程] X592