Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 514, Issue -, Pages 357-363Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2017.12.050
Keywords
Ultrasmall silica cross-linked micellar nanoparticles; Fluorecent sensing; Fe(III) selectivity
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Funding
- National Natural Science Foundation of China [21501018, 51603018]
- Open project of State Key Laboratory of Inorganic Synthesis and Preparative Chemistry [2018-29]
- Training Programs of Innovation and Entrepreneurship for Undergraduates
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This work demonstrated the synthesis of (4E)-4-(4-(diphenylamino)benzylideneamino)-1,2-dihydro-1,5-dimethy1-2-phenylpyrazol-3-one (DBDDP) for Fe (III) detection in aqueous media and in the core of silica cross-linked micellar nanoparticles in living cells. The free DBDDP performed fluorescence enhancement due to Fe (III)-promoted hydrolysis in a mixed aqueous solution, while the DBDDP-doped silica cross linked micellar nanoparticles (DBDDP-SCMNPs) performed an electron-transfer based fluorescence quenching of Fe (III) in living cells. The quenching fluorescence of DBDDP-SCMNPs and the concentration of Fe (III) exhibited a linear correlation, which was in accordance with the Stern-Volmer equation. Moreover, DBDDP-SCMNPs showed a low limit of detection (LOD) of 0.1 ppm and an excellent selectivity against other metal ions. Due to the good solubility and biocompatibility, DBDDP-SCMNPs could be applied as fluorescence quenching nanosensors in living cells. (C) 2017 Elsevier Inc. All rights reserved.
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