Please use this identifier to cite or link to this item:
Title: Spectral and Photophysical Characterization of Donor-π-Acceptor Arylthienyl- and Bithienyl-Benzothiazole Derivatives in Solution and Solid State
Authors: Pina, João 
Melo, J. Sérgio Seixas de 
Burrows, Hugh D. 
Batista, Rosa M. F. 
Costa, Susana P. G. 
Raposo, M. Manuela M. 
Issue Date: 6-Sep-2007
Publisher: American Chemical Society
Citation: The Journal of Physical Chemistry A. 111:35 (2007) 8574-8578
Abstract: A comprehensive study has been made in solution at room temperature (293 K), low temperature (77 K), and in thin films (Zeonex matrixes) of the spectral and photophysical properties of six arylthienyl- and bithienyl-benzothiazole derivatives functionalized with different donor groups. Similar experiments have been carried out with two related precursors (containing the arylthienyl and aryl-bithienyl conjugated systems), and results are compared. Singlet−singlet and triplet−triplet absorption spectra, emission spectra together with lifetimes and quantum yields have been obtained, and from these data the rates for all the radiative and nonradiative processes determined, providing information on the dominant decay processes. The arylthienyl-benzothiazole derivatives show high fluorescence quantum yields (phiF) with negligible internal conversion (phiIC), whereas the bithienyl-benzothiazoles display lower but still significant phiF values, but now radiationless processes (phiIC and phiISC) are competitive. A comparison with the analogous oligothiophenes is made. Singlet oxygen yields were also determined and the triplet energy transfer to 3O2 to produce 1O2 was found to be highly efficient with values of SΔ(= phiΔ/phiT) varying from 0.4 to 1.
ISSN: 1089-5639
DOI: 10.1021/jp0730646
Rights: openAccess
Appears in Collections:FCTUC Química - Artigos em Revistas Internacionais

Files in This Item:
File Description SizeFormat
Spectral and Photophysical Characterization of Donor.pdf162.62 kBAdobe PDFView/Open
Show full item record


checked on May 29, 2020

Citations 5

checked on Aug 2, 2022

Page view(s) 50

checked on Oct 5, 2022


checked on Oct 5, 2022

Google ScholarTM




Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.