| Full text | |
| Author(s): |
Teixeira Alves Duarte, Luis Gustavo
[1, 2]
;
Germino, Jose Carlos
[2]
;
Braga, Claudia de Avila
[1]
;
Barboza, Cristina Aparecida
[3]
;
Zambon Atvars, Teresa Dib
[2]
;
Santos, Fabiano da Silveira
[1]
;
Rodembusch, Fabiano Severo
[1]
Total Authors: 7
|
| Affiliation: | [1] Univ Fed Rio Grande do Sul, Grp Pesquisa Fotoquim Organ Aplicada, Inst Quim, Ave Bento Goncalves 9500, BR-91501970 Porto Alegre, RS - Brazil
[2] Univ Estadual Campinas, Chem Inst, Rua Sergio Buarque de Holanda S-N, Poste Code 6154, BR-13083970 Campinas, SP - Brazil
[3] Polish Acad Sci, Inst Phys, Al Lotnikow 32-46, PL-02668 Warsaw - Poland
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES; v. 17, n. 2, p. 231-238, FEB 2018. |
| Web of Science Citations: | 8 |
| Abstract | |
This work presents the determination of acidic strengths at the electronic ground and excited states (pK(a) and pK{*}(a)) of three flavonol derivatives using electronic absorption and fluorescence emission spectroscopy. The differences of the pK(a) and pK{*}(a) values were successfully correlated with the molecular structures according to the substitution pattern at the flavonol structure (hydrogen, diethylamino or fluoro moieties). In order to obtain more information about the observed photoacidity of these super-acids, geometry optimizations and excitation energy calculations were performed at the CAM-B3LYP/6-311++ G(d, p) level for their neutral, protonated and deprotonated species. (AU) | |
| FAPESP's process: | 13/16245-2 - Photophysical properties of thin films of conjugated polymers |
| Grantee: | Teresa Dib Zambon Atvars |
| Support Opportunities: | Regular Research Grants |