Red-Emissive Center Formation within Carbon Dots Based on Citric Acid and Formamide.

Autor: Stepanidenko EA; International Research and Education Center for Physics of Nanostructures, ITMO University, 197101 Saint Petersburg, Russia., Vedernikova AA; International Research and Education Center for Physics of Nanostructures, ITMO University, 197101 Saint Petersburg, Russia., Miruschenko MD; International Research and Education Center for Physics of Nanostructures, ITMO University, 197101 Saint Petersburg, Russia., Dadadzhanov DR; International Research and Education Center for Physics of Nanostructures, ITMO University, 197101 Saint Petersburg, Russia.; Raymond and Beverly Sackler Faculty of Exact Sciences, School of Chemistry, Tel Aviv University, Tel Aviv 6997801, Israel., Feferman D; Raymond and Beverly Sackler Faculty of Exact Sciences, School of Chemistry, Tel Aviv University, Tel Aviv 6997801, Israel., Zhang B; Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Taipa, Macau SAR, 999078, China., Qu S; Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Taipa, Macau SAR, 999078, China., Ushakova EV; International Research and Education Center for Physics of Nanostructures, ITMO University, 197101 Saint Petersburg, Russia.
Jazyk: angličtina
Zdroj: The journal of physical chemistry letters [J Phys Chem Lett] 2023 Dec 21; Vol. 14 (50), pp. 11522-11528. Date of Electronic Publication: 2023 Dec 13.
DOI: 10.1021/acs.jpclett.3c02837
Abstrakt: The formation of red-emissive optical centers in carbon dots based on citric acid and formamide was investigated by varying the synthesis parameters with focus on finding optimal─necessary and sufficient─amount of precursors to decrease byproduct amount and to increase the chemical yield of red-emissive carbon dots. The emission is observed at 640 nm excited at 590 nm and quantum yield reaches up 19%. A high chemical yield of carbon dots of 26% was achieved at an optimal molar ratio of citric acid to formamide of 1:4.
Databáze: MEDLINE