Please use this identifier to cite or link to this item:
https://hdl.handle.net/10316/5029
Title: | A comprehensive study of the spectral and photophysical properties of arylthiophenes | Authors: | Melo, J. Seixas de Pina, J. Rodrigues, L. M. Becker, R. S. |
Keywords: | Photochemistry; Photophysics; Arylthiophene; Fluorescence; Phosphorescence; Quantum yields; Oligomer; Laser flash photolysis; Thiophene; Phenanthrene | Issue Date: | 2008 | Citation: | Journal of Photochemistry and Photobiology A: Chemistry. 194:1 (2008) 67-75 | Abstract: | A series of conjugated oligomers with rigid (fused-ring) structure, consisting in different polycyclic aromatic hydrocarbons (PAHs) possessing a single thiophene unit, here designated as arylthiophenes, were investigated in solution. For presentation clarity, the compounds were organized in two different groups. The first group includes the compounds where one, two, three and four benzene rings are added to a thiophene unit (a compound with two dibenzothiophene units was also investigated) and the second group includes those compounds where a single thiophene ring is located at different positions in a skeletal-type polyaromatic hydrocarbon (in the present case phenanthrene). The study includes a complete spectroscopic evaluation (including singlet-singlet and triplet-triplet absorption, fluorescence and phosphorescence spectra) as well as a photophysical evaluation (fluorescence, phosphorescence and triplet lifetimes together with fluorescence and triplet occupation quantum yields. With all the above, a complete set of deactivation rate constants (kF, kIC and kISC) was determined. From the fluorescence and phosphorescence spectra the energy of the lowest lying singlet and triplet states (S1 and T1) and the energy of splitting between the two states ([Delta]ES1-T1) was obtained. Semi-empirical ZINDO/S-CI calculations were performed and corroborated the nature and state order experimentally obtained. | URI: | https://hdl.handle.net/10316/5029 | DOI: | 10.1016/j.jphotochem.2007.07.014 | Rights: | openAccess |
Appears in Collections: | FCTUC Química - Artigos em Revistas Internacionais |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
file3dba00bf9fb843acac8bf4d84d339598.pdf | 683.43 kB | Adobe PDF | View/Open |
SCOPUSTM
Citations
14
checked on Oct 14, 2024
WEB OF SCIENCETM
Citations
15
checked on Oct 2, 2024
Page view(s) 50
497
checked on Oct 8, 2024
Download(s) 50
429
checked on Oct 8, 2024
Google ScholarTM
Check
Altmetric
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.