期刊
ACS APPLIED MATERIALS & INTERFACES
卷 11, 期 21, 页码 19301-19307出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b22605
关键词
carbon dots; large-scale preparation; clustering-induced emission; molecular glue; inter-space conjugation
资金
- National Key R&D Program of China [2018YFD0600302]
- National Natural Science Foundation of China [31800494, 201401019, 21878078]
- Young Elite Scientists Sponsorship Program by CAST [2018QNRC001]
- Heilongjiang Science Fund for Distinguished Young Scholars [JC2017003]
- Iranian national science foundation [95013718]
Carbon dots have wide applications in bioimaging, encryption, sensing, and light-emitting devices, but most preparations of carbon dots require complicated separation and purification steps. Here, a clustering-induced emission luminogen, sodium alginate, was covalently glued by ethylenediamine to prepare carbon dots on a 100 g scale, without any separation or purification. The conversion yield was as high as 94.7%. Theoretical calculations suggested that the fluorescence emission of as-prepared carbon dots (N-CDs) was mainly attributable to through-space conjugation between oxygen atoms and carbonyl moieties. The N-CDs were shown to have applications as a fluorescent ink for encryption and as a phosphor for white light-emitting diodes. This work provides a convenient method for the large-scale preparation of carbon dots and a new understanding of fluorescent emission of carbon dots.
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