Photochromic Reactions of 4-[bis(9,9-dimethylfluoren-2-yl)amino]azobenzene in Low Molecular-Mass Organogels

Abstract

In order to gain information about the environment at the solution region within the low molecular-mass organogels, photochromic reactions of title compound were investigated in 12-hydroxystearic acid– and 1,2-(1S,2S)-bis(stearoylamino)cyclohexane–toluene gels in comparison with those in toluene solution. The results suggested that the environment at the solution region within these gels was essentially the same as that in toluene solution although a small fraction of gelator molecules did not embed in the gel network but existed in the solution region.

Keywords:

• Azobenzene
• Low molecular-mass organogel
• Photochromism
• Photostationary state
• Quantum yield
• Rate constant