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The Preparation of Green Fluorescence-Emissioned Carbon Dots/Poly(N-Isopropylacrylamide) Temperature-Sensitive Hydrogels and Research on Their Properties

1,2, 1,2, 1, 1,2, 1,2, 3 and 1,2,*
1
School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan 430074, China
2
National Demonstration Center for Experimental Ethnopharmacology Education, South-Central University for Nationalities, Wuhan 430074, China
3
Information Center, Shanghai Institude of Organic Chemistry, Shanghai 200032, China
*
Author to whom correspondence should be addressed.
Polymers 2019, 11(7), 1171; https://doi.org/10.3390/polym11071171
Received: 7 May 2019 / Revised: 14 June 2019 / Accepted: 17 June 2019 / Published: 11 July 2019
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Abstract

Fluorescence/temperature-sensitive hydrogels, thanks to their properties in fluorescence and temperature sensitivity, have shown a promising outlook in the fields of drug delivery, cell imaging, etc., and thus become the focus of present research. This paper reports the preparation of green-fluorescence/temperature-sensitive hydrogels through one-step radical polymerization with green fluorescence-emissioned carbon dots as fluorescence probes and N-isopropylacrylamide as a monomer. UV-vis spectra, fluorescence spectra, and fluorescence microscope imaging have been used to characterize the prepared hydrogel, and to study their optical and temperature-sensitive properties. It was discovered that the emission of prepared hydrogel is excitation wavelength-dependent, pH responding, and excellent temperature-sensitive, as well as having good biocompatibility. The prepared hydrogel can also be applied as fluorescence ink in the fields of anti-counterfeit identification and appraisal. View Full-Text
Keywords: temperature-sensitive hydrogel; green-emissioned carbon dots; preparation of hydrogel; fluorescence ink temperature-sensitive hydrogel; green-emissioned carbon dots; preparation of hydrogel; fluorescence ink
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Zhao, D.; Ma, W.; Wang, R.; Yang, X.; Li, J.; Qiu, T.; Xiao, X. The Preparation of Green Fluorescence-Emissioned Carbon Dots/Poly(N-Isopropylacrylamide) Temperature-Sensitive Hydrogels and Research on Their Properties. Polymers 2019, 11, 1171.

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