Article (Scientific journals)
Photophysical Study of Bay Substituted Perylenediimides
Fron, E.; Schweitzer, G.; Osswald, P. et al.
2008In Photochemical and Photobiological Sciences, 7 (12), p. 1509-1521
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Abstract :
[en] A detailed investigation of the photophysical properties of a series of perylenediimide systems bearing three different types of bay substituents is presented. Single photon timing and femtosecond transient absorption experiments reveal that the dynamics of interconversion between two conformational arrangements of these substituents occurs with a time constant of 550 ps. In addition, charge transfer from the electron-rich units attached to the bay area of the electron-poor perylenediimide core is observed. This process leads to a fast non-radiative deactivation of the locally excited state of the perylenediimide in polar solvents. When the experimental results of the investigated systems are compared we observe a shift from a conformational dynamics towards competitive excited state processes involving charge transfer in the -meta and -para substituted perylenediimide chromophore.
Disciplines :
Physics
Author, co-author :
Fron, E.
Schweitzer, G.
Osswald, P.
Würthner, F.
Marsal, Philippe
Beljonne, David ;  Université de Mons > Faculté de Médecine et de Pharmacie > Chimie générale, organique et biomédicale ; Université de Mons > Faculté des Sciences > Chimie des matériaux nouveaux
Müllen, K.
De Schryver, F.C.
Van Der Auweraer, M.
Language :
English
Title :
Photophysical Study of Bay Substituted Perylenediimides
Publication date :
01 December 2008
Journal title :
Photochemical and Photobiological Sciences
ISSN :
1474-905X
Publisher :
Royal Society of Chemistry, United Kingdom
Volume :
7
Issue :
12
Pages :
1509-1521
Peer reviewed :
Peer Reviewed verified by ORBi
Research unit :
S817 - Chimie des matériaux nouveaux
Research institute :
R400 - Institut de Recherche en Science et Ingénierie des Matériaux
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