荧光素/层状钇氢氧化物复合体的发光性能及对Hg^(2+)的识别  

Photoluminescence and Detection of Hg(Ⅱ) Ions of Layered Yttrium Hydroxide Composite with Fluorescein

作　　者：李建 苏飞飞 国荣 梁足培 马淑兰[2] LI Jian;SU Fei-Fei;GUO Rong;LIANG Zu-Pei;MA Shu-Lan(Chemistry&Chemical and Environmental Engineering College,Weifang University,Weifang,Shandong 261061,China;College of Chemistry,Beijing Normal University,Beijing 100875,China)

机构地区：[1]潍坊学院化学化工与环境工程学院,潍坊261061 [2]北京师范大学化学学院,北京100875

出　　处：《无机化学学报》2018年第10期1826-1832,共7页Chinese Journal of Inorganic Chemistry

基　　金：山东省自然科学基金(No.ZR2013BL017;ZR2015BL024);北京市自然科学基金(No.2182029)资助项目

摘　　要：合成了层状钇氢氧化物(LYH)复合体FN/OS-LYH(FN为荧光素,OS为1-辛烷磺酸钠),研究了复合体的光致发光性能及剥离态胶体对Hg^(2+)的荧光识别性能。固态下,FN的钠盐不发光,FN/OS-LYH复合体发射黄绿光(564 nm);甲酰胺中,剥离为胶体悬浮液后,复合体发射绿光(540 nm,即剥离后蓝移24 nm),比FN阴离子的发射(572 nm)蓝移32 nm。复合体对高毒性Hg^(2+)具有很好的荧光识别能力,优于其他离子(Mg^(2+),Ni^(2+),Co^(2+),Cu^(2+),Zn^(2+),Pb^(2+)和Cd^(2+))。复合体加入Hg^(2+)后发生荧光淬灭,Hg^(2+)检测限为2.73×10-7mol·L-1,淬灭常数(Ksv)为4.82×102 L·mol-1。The layered yttrium hydroxide(LYH)composite(FN/OS-LYH,where FN is fluorescein,2-(6-hydroxy-3-oxo-(3H)-xanthen-9-yl)benzoic acid,and OS is the anionic surfactant of 1-octane sulfonic acid sodium)is synthesized.The photoluminescence property of the FN/OS-LYH and the application on detection of Hg?髤ions of the delaminated FN/OS-LYH is studied.In solid state,pure FN salt shows no any emission,while the FN/OS-LYH composite displays yellow-green emission at 564 nm,and at delaminated state in formamide(FM),it displays a green emission at 540 nm(with 24 nm blue shift),in contrast to the 572 nm emission of free FN anions with a 32 nm blue shift.The delaminated FN/OS-LYH colloidal suspension exhibits high selectivity for Hg^2+over other ions(Mg^2+,Ni^2+,Co^2+,Cu^2+,Zn^2+,Pb^2+,and Cd^2+)with fluorescence quenching.The detection limit of Hg^2+is determined to be 2.73×10-7 mol·L^-1 and the quenching constant(Ksv)is 4.82×102 L·mol^-1.

关 键 词：LRH复合体 荧光 剥离 离子检测 荧光识别 

分 类 号：O657[理学—分析化学]