ピコ秒・フェムト秒時間分解分光法によるジアリールエテン類のフォトクロミック反応ダイナミックスの研究

2002年分子構造総合討論会, 2002年10月1日-10月4日, 神戸国際会議場(神戸), 3A0

Dynamics of the energy transfer involved in a diarylethene-perylenebisimide dyad: comparison between the molecule and the nanoparticle level

Photochromic materials are widely used to achieve fluorescence photoswitching. Understanding the energy transfer processes that occur in these systems would be an advantage for their use and a better optimization of their properties. In this scope, we studied a diarylethene-perylenebisimide (DAE-PBI) dyad that presents a bright red emission and a large ON-OFF contrast, both in solution and in an aqueous suspension of nanoparticles (NPs). Using ultrafast transient absorption spectroscopy, the excited state dynamics and the FRET processes were characterized for this dyad in THF solution and compared to its behavior in NPs state, disclosing an efficient energy transfer (ET) in NPs