Vibronic structure in the S1-S0 transition of jet-cooled dibenzofuran.
Vibronic structure in the S1-S0 transition of jet-cooled dibenzofuran.
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DOI：
10.1021/jp060563i
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发表时间：
2006-07
期刊：
影响因子：
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通讯作者：
M. Baba;K. Mori;M. Yamawaki;Kumi Akita;Masahide Ito;Shunji Kasahara;T. Yamanaka
中科院分区：
文献类型：
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作者：
M. Baba;K. Mori;M. Yamawaki;Kumi Akita;Masahide Ito;Shunji Kasahara;T. Yamanaka
观测了二苯并呋喃在超音速射流中的荧光激发光谱，分析了S(1)(1)A(1)(PIPI)和S(0)态的振动结构。对转动包络的观察表明，该带是一个B型带。然而，结果表明，大多数强振动带都是A型带。该强度来源于与S(2)(1)B(2)态的振动耦合。我们发现在S(1)态的高振动能级激发下，在色散荧光光谱中有较宽的发射。这表明在分离的二苯并呋喃分子中发生了有效的分子内振动重分配(IVR)。
Fluorescence excitation spectra of dibenzofuran in a supersonic jet are observed and the vibronic structure is analyzed for the S(1) (1)A(1) (pipi) and S(0) states. An observation of the rotational envelopes reveals that the band is a B-type band. However, it is shown that most of the strong vibronic bands are A-type bands. The intensity arises from vibronic coupling with the S(2) (1)B(2) state. We find a broad emission in the dispersed fluorescence spectrum for the excitation of the high vibrational levels in the S(1) state. This indicates that intramolecular vibrational redistribution (IVR) occurs efficiently in the isolated dibenzofuran molecule.