Author/Authors :
Kosumi، نويسنده , , Daisuke and Kajikawa، نويسنده , , Takayuki and Yano، نويسنده , , Koki and Okumura، نويسنده , , Satoshi and Sugisaki، نويسنده , , Mitsuru and Sakaguchi، نويسنده , , Kazuhiko and Katsumura، نويسنده , , Shigeo and Hashimoto، نويسنده , , Hideki، نويسنده ,
Abstract :
Ultrafast excited state dynamics of the short fucoxanthin homolog with four conjugated double bonds and its allene-modified analog in various solvents have been studied by femtosecond pump-probe spectroscopy. The results clarified that the short fucoxanthin homolog exhibits a strong intramolecular charge transfer character in an excited manifold even in a nonpolar solvent. Then, the data show that a modification of the allene-group induced the lifetime shortening of the lowest singlet state of the short fucoxanthin homolog. This implies that the allene-group enhances the ICT character of the short fucoxanthin homolog.
