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de Salles HD, Coelho FL, Paixão DB, Barboza CA, da Silveira Rampon D, Rodembusch FS, Schneider PH. Evidence of a Photoinduced Electron-Transfer Mechanism in the Fluorescence Self-quenching of 2,5-Substituted Selenophenes Prepared through In Situ Reduction of Elemental Selenium in Superbasic Media. J Org Chem 2021; 86:10140-10153. [PMID: 34283602 DOI: 10.1021/acs.joc.1c00874] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
A series of new 2,5-disubstituted selenophene derivatives are described from elemental selenium and 1,3-diynes in superbasic media. The activation of elemental selenium in a KOH/DMSO system allows cyclization with conjugated diynes at room temperature. The cyclization reaction is extended to a broad range of functional groups, for which photophysics were experimentally and theoretically investigated. The selenophene derivatives present absorption maxima in the UV-A region and fluorescence emission in the violet-to-blue region. Fluorescence decay profiles were obtained showing a monoexponential decay with fast fluorescence lifetimes (∼0.118 ns), as predicted by the Strickler-Berg relations. In general, in both investigations, no dependence on the solvent polarity on the absorption and emission maxima location was observed. On the other hand, solvents and substituents are shown to play a role in the fluorescence quantum yield values. In addition, a fluorescence self-quenching behavior could be observed, related to a photoinduced electron-transfer mechanism. Theoretical calculations performed at the MP2/ADC(2)/cc-pVDZ level of theory were performed in order to investigate the photophysical features of this series of selenophene derivatives.
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Affiliation(s)
- Helena Domingues de Salles
- Instituto de Química, Departamento de Química Orgânica, Universidade Federal do Rio Grande do Sul (UFRGS), P.O. Box 15003, 91501-970 Porto Alegre, Rio Grande do Sul, Brazil
| | - Felipe Lange Coelho
- Instituto de Química, Universidade Federal de Goiás (UFG), Campus Samambaia, 74690-900 Goaînia, Goiás, Brazil
| | - Douglas Bernardo Paixão
- Instituto de Química, Departamento de Química Orgânica, Universidade Federal do Rio Grande do Sul (UFRGS), P.O. Box 15003, 91501-970 Porto Alegre, Rio Grande do Sul, Brazil
| | | | - Daniel da Silveira Rampon
- Laboratório de Polímeros e Catálise (LAPOCA), Departamento de Química, Universidade Federal do Paraná (UFPR), P.O. Box 19061, 81531-990 Curitiba, Paraná, Brazil
| | - Fabiano Severo Rodembusch
- Instituto de Química, Departamento de Química Orgânica, Universidade Federal do Rio Grande do Sul (UFRGS), P.O. Box 15003, 91501-970 Porto Alegre, Rio Grande do Sul, Brazil
| | - Paulo Henrique Schneider
- Instituto de Química, Departamento de Química Orgânica, Universidade Federal do Rio Grande do Sul (UFRGS), P.O. Box 15003, 91501-970 Porto Alegre, Rio Grande do Sul, Brazil
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Affiliation(s)
- Damien Prim
- a Laboratoire de Chimie Organique , Ile du Saulcy, Université de Metz , F-57045, Metz Cédex, France
| | - Delphine Joseph
- a Laboratoire de Chimie Organique , Ile du Saulcy, Université de Metz , F-57045, Metz Cédex, France
| | - Gilbert Kirsch
- a Laboratoire de Chimie Organique , Ile du Saulcy, Université de Metz , F-57045, Metz Cédex, France
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Selenophenes. ADVANCES IN HETEROCYCLIC CHEMISTRY 1982. [DOI: 10.1016/s0065-2725(08)60027-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register]
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Selenium-Nitrogen Heterocycles. ADVANCES IN HETEROCYCLIC CHEMISTRY 1979. [DOI: 10.1016/s0065-2725(08)60509-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register]
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Organoselenium Oxidations. ACTA ACUST UNITED AC 1978. [DOI: 10.1016/b978-0-12-697252-8.50006-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Shafiee A, Lalezari I, Mirrashed M, Nercesian D. 1,2,3-Selenadiazolyl-1,3,4-oxadiazole, 1,2,3-Thiadiazolyl-1,3,4-oxadiazole and 5-(1,2,3-Thiadiazolyl)-s-triazolo[3,4-b]-1,3,4-thiadiazoles. J Heterocycl Chem 1977. [DOI: 10.1002/jhet.5570140407] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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