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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Evaluation of the acidic strengths on electronic ground and excited states of proton transfer dye using Excitation-Emission fluorescence matrix (EEM) and Multivariate Curve Resolution with Alternating Least Squares (MCR-ALS)

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Autor(es):
Cordeiro Dantas, Willian Francisco [1] ; Duarte, Luis Gustavo Teixeira Alves [1, 2] ; Rodembusch, Fabiano Severo [2] ; Poppi, Ronei Jesus [1] ; Zambon Atvars, Teresa Dib [1]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] Univ Estadual Campinas, Inst Chem, Campinas - Brazil
[2] Univ Fed Rio Grande do Sul, Inst Quim, Grp Pesquisa Fotoquim Organ Aplicada, Ave Bento Goncalves 9500, BR-91501970 Porto Alegre, RS - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: METHODS AND APPLICATIONS IN FLUORESCENCE; v. 8, n. 4 OCT 2020.
Citações Web of Science: 0
Resumo

Multivariate Curve Resolution with Alternating Least Squares (MCR-ALS) was for the first time successfully used to evaluate an intricate photophysical behavior, where deprotonation on the electronic ground state (S-0), intra and intermolecular proton transfer processes (ESPT and ESIPT) on the electronic excited state (S-1) can simultaneously be presented. In this sense, the organic dye 2-(2 `-hydroxyphenyl)benzothiazole (HBT) was used as a proof-of-concept model, where MCR-ALS showed to be a powerful tool for discriminate chemical reactions that occur concomitantly on different potential energy surfaces, which include photochemical reactions. As a result, the chemometric method showed to be a straightforward approach for the determination of the acidic strengths of those equilibria were estimated as 8.61 and 1.11 to hydroxyl deprotonation on electronic ground and excited states, respectively. (AU)

Processo FAPESP: 13/16245-2 - Propriedades fotofísicas de filmes finos de polímeros conjugados
Beneficiário:Teresa Dib Zambon Atvars
Modalidade de apoio: Auxílio à Pesquisa - Regular