Investigation of Heavy Atom Effect on Fluorescence of Carbon Dots: NCDs and S,N-CDs.

Autor: Aswathy AO; Department of Chemistry, School of Physical and Mathematical Sciences, Research Centre, University of Kerala, Kariavattom Campus, Thiruvananthapuram, Kerala, 695581, India., Anju SM; Department of Chemistry, School of Physical and Mathematical Sciences, Research Centre, University of Kerala, Kariavattom Campus, Thiruvananthapuram, Kerala, 695581, India., Jayakrishna J; Department of Chemistry, School of Physical and Mathematical Sciences, Research Centre, University of Kerala, Kariavattom Campus, Thiruvananthapuram, Kerala, 695581, India., Vijila NS; Department of Chemistry, School of Physical and Mathematical Sciences, Research Centre, University of Kerala, Kariavattom Campus, Thiruvananthapuram, Kerala, 695581, India., Anjali Devi JS; Department of Chemistry, School of Physical and Mathematical Sciences, Research Centre, University of Kerala, Kariavattom Campus, Thiruvananthapuram, Kerala, 695581, India., Anjitha B; Department of Chemistry, School of Physical and Mathematical Sciences, Research Centre, University of Kerala, Kariavattom Campus, Thiruvananthapuram, Kerala, 695581, India., George S; Department of Chemistry, School of Physical and Mathematical Sciences, Research Centre, University of Kerala, Kariavattom Campus, Thiruvananthapuram, Kerala, 695581, India. emailtosony@gmail.com.
Jazyk: angličtina
Zdroj: Journal of fluorescence [J Fluoresc] 2020 Dec; Vol. 30 (6), pp. 1337-1344. Date of Electronic Publication: 2020 Aug 18.
DOI: 10.1007/s10895-020-02607-x
Abstrakt: The present work is an attempt to investigate the heavy atom effect imparted by halide ions, especially iodide (I - ) ions on the fluorescence behavior of carbon dots (CDs). Here two different types of CDs viz. nitrogen doped carbon dots (NCDs) from Citric Acid (CA) & Urea and Sulfur and nitrogen co-doped carbon dots (S,N-CDs) from CA & L-Cysteine were synthesized and the fluorescence of both CDs were quenched by heavy atom effect on adding potassium iodide (KI). The large difference in average lifetime was obtained in time-correlated single-photon counting (TCSPC) analysis suggests the dynamic quenching and heavy atom effect. Graphical abstract.
Databáze: MEDLINE
Externí odkaz: