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题名: Comprehensive Studies on Excited-State Proton Transfer of a Series of 2-(2 '-Hydroxyphenyl)benzothiazole Derivatives: Synthesis, Optical Properties, and Theoretical Calculations
作者: Cheng, Jinling1, 2;  Liu, Di1;  Li, Wei1;  Bao, Lijun1;  Han, Keli2
刊名: JOURNAL OF PHYSICAL CHEMISTRY C
发表日期: 2015-02-26
DOI: 10.1021/jp511578v
卷: 119, 期:8, 页:4242-4251
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science
英文摘要: A group of novel 2-(2'-hydroxyphenyl)benzothiazole derivatives (1-4) with excited-state intramolecular proton transfer (ESIPT) character were synthesized. Their photophysical properties were studied by means of steady-state absorption and fluorescence spectra and time-resolved emission method as well as theoretical calculation in a variety of solvents. All of these compounds can yield single fluorescence at the green region in nonpolar solvents such as n-hexane, while dual fluorescence consisting of the blue and green bands was captured in strong polar solvents like acetonitrile. In addition, a third emission band between the former two bands was detected for these molecules simultaneously with the blue and green ones generating the well-structured triple fluorescence in protic solvent like ethanol. Systematical comparison of the fluorescence of these compounds in a series of solvents demonstrated that nonpolar solvents would facilitate ESIPT process and the green emission from the keto format, while the strong polar solvents impede the ESIPT process and favor the blue normal emission from enol. Protic solvents facilitate deprotonation and make the phenolic anion coexist with keto and enol and consequently lead to triple fluorescence. On the premise of identical keto emission intensity, the normal emission intensity of these compound increases consecutively in the order of increasing electron-withdrawing ability of the substituents regardless of solvents. The results of quantum-chemical calculations are well in line with the experimental spectra.
关键词[WOS]: LIGHT-EMITTING-DIODES ;  INTRAMOLECULAR PROTON ;  TRANSFER ESIPT ;  IRIDIUM COMPLEXES ;  COUPLED ELECTRON ;  FLUORESCENCE ;  DENSITY ;  MECHANISM ;  EXCHANGE ;  ELECTROLUMINESCENCE
语种: 英语
WOS记录号: WOS:000350329300039
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/146053
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.Dalian Univ Technol, Sch Chem, State Key Lab Fine Chem, Dalian 116024, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China

Recommended Citation:
Cheng, Jinling,Liu, Di,Li, Wei,et al. Comprehensive Studies on Excited-State Proton Transfer of a Series of 2-(2 '-Hydroxyphenyl)benzothiazole Derivatives: Synthesis, Optical Properties, and Theoretical Calculations[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2015,119(8):4242-4251.
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