Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/243195
Type: Artigo de periódico
Title: Effective Targeting Of Proton Transfer At Ground And Excited States Of Ortho-(2 '-imidazolyl)naphthol Constitutional Isomers
Author: Oliveira
Thais C. F.; Carmo
Luiz F. V.; Murta
Barbara; Duarte
Luis G. T. A.; Nome
Rene A.; Rocha
Willian R.; Brandao
Tiago A. S.
Abstract: Steady-state and time-resolved spectroscopy and quantum chemical computational studies were employed to investigate ground and excited state proton transfer of a novel series of ortho-(1H-imidazol-2-yl)naphthol constitutional isomers: 1-(1H-imidazol-2-yl)naphthalen-2-ol (1NI2OH), 2-(1H-imidazol-2-yl)naphthalen-1-ol (2NI1OH) and 3-(1H-imidazol-2-yl)naphthalen-2-ol (3NI2OH). Proper Near Attack Conformations (NACs) involving a strong intramolecular hydrogen bond between the naphthol moiety and the ortho-imidazole group account for the highest ground state acidity of 2NI1OH compared with 1NI2OH and 3NI2OH. Moreover, ESIPT for 2NI1OH and 3NI2OH is further associated with planar chelate H-ring formation whereas 1NI2OH shows the highest ESIPT barrier and a noncoplanar imidazole group. In addition to energetic and structural requirements, the final state also depends on electronic configuration of the ESIPT product with the neutral 3NI2OH showing an ICT effect that correlates with the excited state pKa of the cationic species.
Subject: Transfer Esipt Fluorescence
Potential-energy Functions
Intramolecular Reactions
Transfer Catalysis
Salicylic-acid
Basis-sets
Ab-initio
Enzymes
2-(2-hydroxyphenyl)benzimidazole
Photophysics
Country: CAMBRIDGE
Editor: ROYAL SOC CHEMISTRY
Citation: Effective Targeting Of Proton Transfer At Ground And Excited States Of Ortho-(2 '-imidazolyl)naphthol Constitutional Isomers. Royal Soc Chemistry, v. 17, p. 2404-2415 Jan-2015.
Rights: aberto
Identifier DOI: 10.1039/c4cp04337e
Address: http://pubs.rsc.org/en/Content/ArticleLanding/2015/CP/C4CP04337E#!divAbstract
Date Issue: 2015
Appears in Collections:Unicamp - Artigos e Outros Documentos

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