Uncovering the pKa dependent fluorescence quenching of carbon dots induced by chlorophenols

Nanoscale
Yu ZhangLiang Feng

Abstract

Fluorescence quenching induced by targets is always an alluring strategy to elucidate the possible photoluminescence origin of carbon dots. In this study, a new kind of N, S co-doped carbon dots (NSCDs) was synthesized and the fluorescence of NSCDs was surprisingly found to be quenched by chlorophenols (CPs) in a pKa dependent mode. Detailed investigation of this behavior demonstrated that phenolate was the responsible species and N and/or S dopants in NSCDs failed to play a role in the fluorescence quenching. Further evidence uncovered that the quenching was a static one, where a non-fluorescent intermediate was formed between electron-deficient C=O on the CDs surface and the electron-rich phenolic oxygen anion of chlorophenolate via nucleophilic addition. Moreover, one of the main photoluminescence origins of this kind of CDs was derived, namely surface emissive sites mostly attributed to carbonyl groups.

References

Oct 8, 2004·Journal of the American Chemical Society·Xiaoyou XuWalter A Scrivens
Aug 29, 2007·Journal of the American Chemical Society·Li CaoYa-Ping Sun
Feb 26, 2011·Nanoscale·Parambath AnilkumarYa-Ping Sun
Mar 16, 2011·Journal of the American Chemical Society·Li CaoYa-Ping Sun
Sep 1, 2011·Chemical Communications : Chem Comm·Huzhi ZhengRui Zhu
Mar 14, 2012·Chemical Communications : Chem Comm·Jianhua ShenChunzhong Li
Aug 6, 2013·Accounts of Chemical Research·Changqin DingYang Tian
Aug 12, 2014·Nature Communications·Jiechao GeXiaodong Han
Oct 10, 2014·Nanoscale·Hui DingHuan-Ming Xiong
Oct 16, 2014·Chemical Society Reviews·Shi Ying LimZhiqiang Gao

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Citations

Aug 28, 2015·Chemistry : a European Journal·Yu WangLiang Feng
Jun 5, 2016·Talanta·Li-Ming Shen, Jing Liu
Apr 25, 2019·ACS Applied Materials & Interfaces·Shuqin ChenLiang Feng

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