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Facile, Quick, and Gram‐Scale Synthesis of Ultralong‐Lifetime Room‐Temperature‐Phosphorescent Carbon Dots by Microwave Irradiation
Abstract
Long‐lifetime room‐temperature phosphorescence (RTP) materials are important for many applications, but they are highly challenging materials owing to the spin‐forbidden nature of triplet exciton transitions. Herein, a facile, quick and gram‐scale method for the preparation of ultralong RTP (URTP) carbon dots (CDs) was developed via microwave‐assisted heating of ethanolamine and phosphoric acid aqueous solution. The CDs exhibit the longest RTP lifetime, 1.46 s (more than 10 s to naked eye) for CDs‐based materials to date. The doping of N and P elements is critical for the URTP which is considered to be favored by a n→π* transition facilitating intersystem crossing (ISC) for effectively populating triplet excitons. In addition, possibilities of formation of hydrogen bonds in the interior of the CDs may also play a significant role in producing RTP. Potential applications of the URTP CDs in the fields of anti‐counterfeiting and information protection are proposed and demonstrated.
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Metadata
- Authors
- Jiang, K., Wang, Y., Gao, X., Cai, C., & Lin, H.
- Venue
- Angewandte Chemie International Edition
- Publisher
- Wiley
- Published
- 2018-04-25
- Volume
- 57
- Issue
- 21
- Pages
- 6216-6220
- ISSN
- 1433-7851 (ISSN-L)
- 1521-3773
- OpenAlex
- W2798057227
- Cited by
- 630
- References
- 51
- FWCI
- 22.77
- Type
- journal article
- Language
- en
- Open access
- closed
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