Abstract
We report on the time-resolved luminescence spectroscopy of a quasi-one-dimensional halogen-bridged platinum complex, [Pt(en) 2 ][Pt(en) 2 I 2 ] (ClO 4 ) 4 , at room temperature in the energy range between 1.2 and 0.9 eV. A strong first peak at the time origin and subsequent oscillating features were observed in the time evolution curves of luminescence intensity. As the frequency of the wavepacket oscillation in the self-trapped exciton, we obtained 2.92 THz (97 cm -1 ), which is 77% of the symmetric stretching mode frequency in the ground state. We analyzed the measured time evolution of the luminescence intensity by using the theory of resonant secondary radiation.
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