Nanosecond Laser Flash Photolysis of 1-Anilinonaphthalene

The photoionization mechanism of 1-anilinonaphthalene (1-AN) was investigated by a nanosecond laser flash photolysis and the result was compared with that of 8-anilino-1-naphthalenesulfonate (ANS). The photoionization of 1-AN in polar solvent is shown to occur through a biphotonic process via a triplet state; the mechanism is different from those of ANS, in which an intermediate of a charge transfer to solvent (CTTS) state was observed. Thus the major deactivation process of the lowest excited singlet state is an intersystem crossing in 1-AN, while it is a transition to the CTTS state in ANS which might be stabilized by the sulfonato group.

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