NaYF4:Yb3+-Er3+ nanocrystals/P(NIPAM-co-RhBHA) core-shell nanogels: Preparation, structure, multi stimuli-responsive behaviors and application as detector for Hg2+ ions

被引：9
作者：
Li, Tan [1 ]
Zhou, Wen [1 ]
Song, Qiusheng [1 ]
Fang, Wenchao [1 ]
机构：
[1] Hefei Univ Technol, Sch Chem & Chem Engn, Hefei 230009, Peoples R China
来源：
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2015年 / 302卷
关键词：
NaYF4:Yb3+-Er3+ nanocrystals; RhBHA; Stimuli-responsive; Core-shell; He2+ ions; FRET; SELECTIVE FLUORESCENT SENSOR; RESONANCE ENERGY-TRANSFER; MERCURY(II) DETECTION; FRET SYSTEM; CONVERSION; DNA; NANOPARTICLES; CHEMOSENSORS; LUMINESCENCE; FABRICATION;
D O I：
10.1016/j.jphotochem.2015.01.012
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In the present study, we report a novel core-shell nanogels of NaYF4:Yb3+-Er3+ nanocrystals/P(NIPAM-co-RhBHA) based on up-conversion excitation and fluorescence resonance energy transfer (FRET). Firstly, up-conversion NaYF4:Yb3+-Er3+ nanocrystals were synthesized by hydrothermal method with EDTA, Er(NO3)(3), Yb(NO3)(3), Y(NO3)(3) and NaF as raw materials. Then, the nanocrystals were decorated with MPS. Finally, core-shell nanogels with thermo-responsive shells were fabricated via free radical emulsion polymerization of N-isopropylacrylamide (NIPAM) and N-acrylyl-N'-rhodamine B acylhydrazine thiourea (RhBHA) dye monomers. Their structure, stimuli-responsive behaviors were investigated via TEM, FTIR, XRD, DSC, UV-vis and PL in detail. The results suggest that the nanogels can response to multi-stimuli, such as pH value, temperature, metal ions, and they can be used as sensitive detector for Hg2+ ions. (C) 2015 Elsevier B.V. All rights reserved.
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收藏
页码：51 / 58
页数：8
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