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An Optical Probe Possessing Upconversion Luminescence and Hg 2+ ‐Sensing Properties
Author(s) -
Zhang Jin,
Li Bin,
Zhang Liming,
Zhang Ligong
Publication year - 2013
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201300441
Subject(s) - photon upconversion , luminescence , photoluminescence , nanorod , fourier transform infrared spectroscopy , materials science , transmission electron microscopy , analytical chemistry (journal) , scanning electron microscope , spectroscopy , rhodamine 6g , rhodamine , chemistry , fluorescence , photochemistry , nanotechnology , optics , optoelectronics , organic chemistry , physics , quantum mechanics , composite material
Abstract A Hg 2+ ‐selective chromophoric upconversion nanosystem is achieved by covalently grafting Rhodamine B hydrazide (RB‐hydrazide) onto upconversion luminescent nanorod core–shell structures. The prepared β‐NaYF 4 nanorods are coated with silica and characterized by X‐ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy‐dispersive X‐ray analysis (EDAX), Fourier‐transform infrared spectroscopy (FTIR), and photoluminescence spectra. Under 980 nm excitation, the upconversion luminescence is sensitive towards Hg 2+ because RB‐hydrazide‐Hg can efficiently absorb green upconversion emission. The prepared nanocomposites exhibit high sensitivity and selectivity towards Hg 2+ over other metal ions. These results indicate that this nanosystem could be developed as a promising fluorescence probe for detecting Hg 2+ ions.