Stationary and time-resolved spectra of 2,2′:5′,2″-terthiophene |
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Authors: | Aiping Yang Stephen Hughes Masami Kuroda Yotaro Shiraishi Takayoshi Kobayashi |
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Abstract: | By analyzing the stationary absorption spectrum of 2,2′:5′,2″-terthiophene in dichloromethane at room temperature, the zero–zero S1←S0 transition energy is determined. Time-resolved fluorescence measurements show that the S1→S0 radiative relaxation in various solvents decays exponentially with a common time constant of 170±10 ps. The fluorescence anisotropy of 2,2′:5′,2″-terthiophene in dichloromethane is also studied and the transient dichroism is interpreted in terms of the revolution of a hydrodynamic prolate ellipsoid with the emission dipole aligned parallel to the long molecular axis. |
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