| 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 |
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| 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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