Aswathy A O, Anju S Madanan, Jayakrishna J, Vijila N S, Anjali Devi J S, Anjitha B, George Sony
Department of Chemistry, School of Physical and Mathematical Sciences, Research Centre, University of Kerala, Kariavattom Campus, Thiruvananthapuram, Kerala, 695581, India.
J Fluoresc. 2020 Dec;30(6):1337-1344. doi: 10.1007/s10895-020-02607-x. Epub 2020 Aug 18.
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.
本工作旨在研究卤离子，特别是碘离子（I⁻）对碳点（CDs）荧光行为的重原子效应。在此合成了两种不同类型的碳点，即由柠檬酸（CA）和尿素制备的氮掺杂碳点（NCDs）以及由CA和L-半胱氨酸制备的硫氮共掺杂碳点（S,N-CDs），并且在添加碘化钾（KI）时，两种碳点的荧光都因重原子效应而猝灭。时间相关单光子计数（TCSPC）分析中获得的平均寿命的巨大差异表明了动态猝灭和重原子效应。图形摘要。
