| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 9577448 | Chemical Physics Letters | 2005 | 7 Pages |
Abstract
Radiationless transitions of 1-(dimethylamino)naphthalene (1DMAN) and its 4-, 5-, 6-, and 7-methoxy derivatives having a twisted dimethylamino group in the Franck-Condon excited state are investigated by means of picosecond time-resolved fluorescence measurements. The fast internal conversion (IC), that has previously been observed for 1DMAN, is also found for its 5- and 6-methoxy derivatives, while the IC rate decreases substantially in the 4- and 7-methoxy derivatives, showing that the fast IC is related to the proximity of the S1 and S2 states and also to the electronic structures of the S1 and S2 states.
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Authors
Kazuyuki Takehira, Kengo Suzuki, Hiroshi Hiratsuka, Seiji Tobita,