Affiliation:
1. School of Chemistry Engineering Research Center of Energy Storage Materials and Devices Ministry of Education Xi'an Jiaotong University Xi'an 710049 P. R. China
2. School of Future Technology Xi'an Jiaotong University Xi'an 710049 P. R. China
3. Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province School of Chemistry and Chemical Engineering Shaanxi Normal University Xi'an 710062 P. R. China
Abstract
AbstractWe report the rational design of the matrix‐free carbon dots (C‐dots) with long wavelength and wavelength‐tunable room‐temperature phosphorescence (RTP). Taking advantage of microwave‐assisted heating treatment, three RTP C‐dots in boric acid (BA) composites are synthesized by using diethylenetriaminepentakis (methylphosphonic acid) as a multiple‐sites crosslink agent, a moderately acid catalyst and P source; phenylenediamines (either o‐PD, m‐PD, or p‐PD, respectively) as building block while BA as a carbonization‐retardant matrix. After the water‐soluble BA matrix is removed by dialysis, three matrix‐free C‐dots are obtained with RTP emission at 540, 550 and 570 nm under an excitation wavelength of 365 nm. Alterations of RTP emission of three matrix‐free C‐dots are ascribed to the difference in their particle size and band gap from n‐π* transition. Furthermore, the application of three matrix‐free C‐dots are successfully performed in information encryption and decryption.
Funder
National Natural Science Foundation of China
Subject
General Chemistry,Biochemistry,Organic Chemistry
Cited by
3 articles.
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