期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 14, 期 26, 页码 5975-5984出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.3c01497
关键词
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Multicolor fluorescent carbon dots with unconventional luminescence behavior were prepared using o-, m-, or p-phenylenediamine (o-PD, m-PD, or p-PD) and 2,3-dihydroxynaphthalene as reaction precursors. The fluorescence emission of the synthesized carbon dots followed a rule of o-PD to m-PD to p-PD from blue to red, contrary to most previously reported results. The differences in the polymerization, surface states, functional groups, and graphite N content of the carbon dots were identified as the main reasons for the unconventional luminescence behavior. These multicolor carbon dots have promising applications in LED lighting and anticounterfeiting fields.
Fluorescence regulation of carbon dots (CDs) during theirpreparationhas become a hot research topic. In this work, multicolor fluorescentCDs with unconventional luminescence behavior are prepared by using o-, m-, or p-phenylenediamine(o-PD, m-PD, or p-PD, respectively) and 2,3-dihydroxynaphthalene with rich hydroxylgroups as reaction precursors. Tunable multicolor fluorescent CDswith bright blue, yellow, and red colors can be obtained by a solvothermalmethod under the joint action of ethanol and hydrochloric acid. Thefluorescence emission of the synthesized CDs follows a rule of o-PD to m-PD to p-PD fromblue to red, which is contrary to most previously reported results(the luminescence from blue to red following an order of m-PD to o-PD to p-PD). Our resultsreveal that the differences in the polymerization, surface states,functional groups, and graphite N content of CDs might be the mainreasons for the unconventional luminescence behavior. In addition,these multicolor CDs have good applications in the fields of light-emittingdiode lighting and anticounterfeiting.
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