| Strong π-π stacking interactions led to the mis-assignment of dimer emissions to the monomers of 1-acetylpyrene |
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| 作者姓名： | Shuangshuang Long Weijie Chi Lu Miao Qinglong Qiao Xiaogang Liu Zhaochao Xu |
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| 作者单位： | CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;
; Fluorescence Research Group, Singapore University of Technology and Design, Singapore 487372, Singapore;
; University of Chinese Academy of Sciences, Beijing 100039, China |
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| 基金项目： | financially supported by the National Natural Science Foundation of China(Nos. 21878286, 21502189);DICP (Nos. DMT0201603, TMSR201601);the financial support from Singapore University of Technology and Design (SUTD);the SUTD-MIT International Design Centre (Nos. T1SRCI17126, IDD21700101, IDG31800104) |
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| 摘 要： | Understanding relationships between molecular structures and fluorescent properties is critical to enable rational deployment of fluorophores. 1-Acetyl pyrene is an important pyrene-derivative, used extensively as an environment-sensitive probe. In the past, the fluorescence of 1-acetylpyrene was considered to be polarity-sensitive with a large positive solvatochromism, and its monomer emissions were believed in the range of 410-470 nm. In this paper, our experimental and theoretical studies showed that the monomer fluorescence of 1-acetylpyrene is centered at ～390 nm,which is similar to that of pyrene dyes and not polarity-sensitive. Previously observed "monomer emission" has been re-assigned to that of dimers, which represent the dominant existence form of 1-acetylpyrene in the solution phase,as a result of strong intermolecular π-π stacking interactions.
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| 关 键 词： | 1-Acetylpyrene PYRENE Aggregation MONOMER EXCIMER |
| 收稿时间： | 3 December 2018 |
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