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题名: Uncovering the pK(a) dependent fluorescence quenching of carbon dots induced by chlorophenols
作者: Zhang, Yu1;  Wang, Yu1;  Guan, Yafeng1;  Feng, Liang1
刊名: NANOSCALE
发表日期: 2015
DOI: 10.1039/c5nr00490j
卷: 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
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.
关键词[WOS]: GRAPHENE QUANTUM DOTS ;  VISIBLE-LIGHT PHOTOCATALYSTS ;  LIVING CELLS ;  NITROGEN ;  IONS ;  FACILE ;  NANODOTS ;  SENSORS ;  SULFUR ;  PROBE
语种: 英语
WOS记录号: WOS:000351934700051
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/146132
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Key Lab Separat Sci Analyt Chem, Dalian 116023, Liaoning, Peoples R China

Recommended Citation:
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.
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