荧光素/层状钇氢氧化物复合体的发光性能及对Hg2+的识别
Photoluminescence and Detection of Hg(II) Ions of Layered Yttrium Hydroxide Composite with Fluorescein
作者单位E-mail
李建 潍坊学院化学化工与环境工程学院, 潍坊 261061  
苏飞飞 北京师范大学化学学院, 北京 100875  
国荣 北京师范大学化学学院, 北京 100875  
梁足培 潍坊学院化学化工与环境工程学院, 潍坊 261061 zupeiliang@163.com 
马淑兰 北京师范大学化学学院, 北京 100875 mashulan@bnu.edu.cn 
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Hg2+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Hg2+具有很好的荧光识别能力,优于其他离子(Mg2+,Ni2+,Co2+,Cu2+,Zn2+,Pb2+和Cd2+)。复合体加入Hg2+后发生荧光淬灭,Hg2+检测限为2.73×10-7 mol·L-1,淬灭常数(Ksv)为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
基金项目: 山东省自然科学基金(No.ZR2013BL017,ZR2015BL024)和北京市自然科学基金(No.2182029)资助项目。
Abstract: 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(II) 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 Hg2+ over other ions (Mg2+, Ni2+, Co2+, Cu2+, Zn2+, Pb2+, and Cd2+) with fluorescence quenching. The detection limit of Hg2+ is determined to be 2.73×10-7 mol·L-1 and the quenching constant (Ksv) is 4.82×102 L·mol-1.
Keywords: LRH composite  luminescence  delamination  ion detection  fluorescence recognition
投稿时间:2018-05-17 修订日期:2018-06-28
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李建,苏飞飞,国荣,梁足培,马淑兰.荧光素/层状钇氢氧化物复合体的发光性能及对Hg2+的识别[J].无机化学学报,2018,34(10):1826-1832.
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