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Excited‐State Dynamics of Pentacene Derivatives with Stable Radical Substituents
Author(s) -
Ito Akitaka,
Shimizu Akihiro,
Kishida Noriaki,
Kawanaka Yusuke,
Kosumi Daisuke,
Hashimoto Hideki,
Teki Yoshio
Publication year - 2014
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201310291
Subject(s) - singlet fission , pentacene , intersystem crossing , excited state , photochemistry , ultrafast laser spectroscopy , chemistry , moiety , triplet state , singlet state , absorption (acoustics) , materials science , stereochemistry , molecule , organic chemistry , spectroscopy , atomic physics , physics , electrode , quantum mechanics , composite material , thin film transistor
The excited‐state dynamics of pentacene derivatives with stable radical substituents were evaluated in detail through transient absorption measurements. The derivatives showed ultrafast formation of triplet excited state(s) in the pentacene moiety from a photoexcited singlet state through the contributions of enhanced intersystem crossing and singlet fission. Detailed kinetic analyses for the transient absorption data were conducted to quantify the excited‐state characteristics of the derivatives.