Formation and fluorescent mechanism of red emissive carbon dots from
o -phenylenediamine and catechol systemFormation and fluorescent mechanism of red emissive carbon dots from
o -phenylenediamine and catechol system- LSA 2022年11卷第11期 页码：2687-2697
- Affiliations：
Center of Excellence for Environmental Safety and Biological Effects, Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemistry, Beijing University of Technology, 100124, Beijing, China
- Author bio：
Zaicheng Sun (sunzc@bjut.edu.cn)
- Funds：
DOI：10.1038/s41377-022-00984-5
中图分类号：纸质出版日期：2022-11-30，
网络出版日期：2022-10-13，
收稿日期：2022-04-09，
修回日期：2022-08-31，
录用日期：2022-09-15
- Accepted：
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Formation and fluorescent mechanism of red emissive carbon dots from
o -phenylenediamine and catechol system[J]. LSA, 2022,11(11):2687-2697.Li, P. F. et al. Formation and fluorescent mechanism of red emissive carbon dots from o-phenylenediamine and catechol system. Light: Science & Applications, 11, 2687-2697 (2022).
Formation and fluorescent mechanism of red emissive carbon dots from
o -phenylenediamine and catechol system[J]. LSA, 2022,11(11):2687-2697. DOI： 10.1038/s41377-022-00984-5.Li, P. F. et al. Formation and fluorescent mechanism of red emissive carbon dots from o-phenylenediamine and catechol system. Light: Science & Applications, 11, 2687-2697 (2022). DOI： 10.1038/s41377-022-00984-5.
摘要
Abstract
Carbon dots (CDs) as the advancing fluorescent carbon nanomaterial have superior potential and prospective. However
the ambiguous photoluminescence (PL) mechanism and intricate structure-function relationship become the greatest hindrances in the development and applications of CDs. Herein
red emissive CDs were synthesized in high yield from
o
-phenylenediamine (oPD) and catechol (CAT). The PL mechanism of the CDs is considered as the molecular state fluorophores because 5
14-dihydroquinoxalino[2
3-b] phenazine (DHQP) is separated and exhibits the same PL properties and behavior as the CDs. These include the peak position and shape of the PL emission and PL excitation and the emission dependence on pH and solvent polarity. Both of them display close PL lifetime decays. Based on these
we deduce that DHQP is the fluorophore of the red emissive CDs and the PL mechanism of CDs is similar to DHQP. During the PL emission of CDs
the electron of the molecule state can transfer to CDs. The formation process of DHQP is further confirmed by the reaction intermediates (phthalazine
dimers) and oPD. These findings provide insights into the PL mechanism of this type of CDs and may guide the further development of tunable CDs for tailored properties.
关键词
Keywords
references
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