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Gel chromism and anomalous luminescence in poly(3-alkylthiophene) |
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| Authors: | Katsumi Yoshino Shigenori Morita and Ryuichi Sugimoto |
| Affiliation: | Department of Electronic Engineering, Faculty of Engineering, Osaka University, Yamada-Oka 2-1, Suita, Osaka, Japan |
| Abstract: | The absorption spectrum of poly(3-alkylthiophene) gel changes drastically in association with a volume instability upon changing the solvent composition and also the temperature. In the expanded state in chloroform and at high temperature, the photoluminescence is much enhanced compared with the shrunken state in ethanol and at low temperature. This gel chromism and anomalous luminescence are discussed in terms of the change of effective conjugation length induced by the steric hindrance and the dynamics of the photoexcited species. |
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