DICP OpenIR
Uncovering the pK(a) dependent fluorescence quenching of carbon dots induced by chlorophenols
Zhang, Yu; Wang, Yu; Guan, Yafeng; Feng, Liang
刊名NANOSCALE
2015
DOI10.1039/c5nr00490j
7期:14页:6348-6355
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
类目[WOS]Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
研究领域[WOS]Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
关键词[WOS]GRAPHENE QUANTUM DOTS ; VISIBLE-LIGHT PHOTOCATALYSTS ; LIVING CELLS ; NITROGEN ; IONS ; FACILE ; NANODOTS ; SENSORS ; SULFUR ; PROBE
英文摘要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 pK(a) 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.
语种英语
WOS记录号WOS:000351934700051
引用统计
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/146132
专题中国科学院大连化学物理研究所
作者单位Chinese Acad Sci, Dalian Inst Chem Phys, Key Lab Separat Sci Analyt Chem, Dalian 116023, Liaoning, Peoples R China
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Zhang, Yu,Wang, Yu,Guan, Yafeng,et al. Uncovering the pK(a) dependent fluorescence quenching of carbon dots induced by chlorophenols[J]. NANOSCALE,2015,7(14):6348-6355.
APA Zhang, Yu,Wang, Yu,Guan, Yafeng,&Feng, Liang.(2015).Uncovering the pK(a) dependent fluorescence quenching of carbon dots induced by chlorophenols.NANOSCALE,7(14),6348-6355.
MLA Zhang, Yu,et al."Uncovering the pK(a) dependent fluorescence quenching of carbon dots induced by chlorophenols".NANOSCALE 7.14(2015):6348-6355.
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