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Polymerization-Driven Photoluminescence in Alkanolamine-Based C-Dots
- Source :
- Chemistry (Weinheim an der Bergstrasse, Germany). 27(7)
- Publication Year :
- 2020
-
Abstract
- Carbonized polymer dots (CPDs), a peculiar type of carbon dots, show extremely high quantum yields, making them very attractive nanostructures for application in optics and biophotonics. The origin of the strong photoluminescence of CPDs resides in a complicated interplay of several radiative mechanisms. To understand the correlation between CPD processing and properties, the early stage formation of carbonized polymer dots has been studied. In the synthesis, citric acid monohydrate and 2-amino-2-(hydroxymethyl)propane-1,3-diol have been thermally degraded at 180 °C. The use of an oil bath instead of a more traditional hydrothermal reactor has allowed the CPD properties to be monitored at different reactions times. Transmission electron microscopy, time-resolved photoluminescence, nuclear magnetic resonance, infrared, and Raman spectroscopy have revealed the formation of polymeric species with amide and ester bonds. Quantum chemistry calculations have been employed to investigate the origin of CPD electronic transitions. At short reaction times, amorphous C-dots with 80 % quantum yield, have been obtained.
- Subjects :
- chemistry.chemical_classification
Photoluminescence
010405 organic chemistry
Organic Chemistry
Nanoparticle
Quantum yield
General Chemistry
Polymer
010402 general chemistry
Photochemistry
01 natural sciences
Quantum chemistry
Catalysis
0104 chemical sciences
Amorphous solid
symbols.namesake
chemistry
Polymerization
symbols
Raman spectroscopy
Subjects
Details
- ISSN :
- 15213765
- Volume :
- 27
- Issue :
- 7
- Database :
- OpenAIRE
- Journal :
- Chemistry (Weinheim an der Bergstrasse, Germany)
- Accession number :
- edsair.doi.dedup.....cebf76fc5c61764e72d759c99fe70921