| Abstract
| - Diarylethene derivatives with hexaethylene glycol side chains were synthesized and their self-assemblingand photochromic reactivity were investigated. The diarylethenes showed photochromism in organicsolvents and even in water. The aqueous solution of the compounds turned turbid quickly upon heating.The clouding behavior was investigated using 1H NMR spectroscopy, dynamic light scattering, andabsorption spectroscopy. It was revealed that, in the aqueous solution, the compounds self-assembledinto aggregates, and the aggregates were loosened by raising the temperature. The cloud-point temperatureof the closed-ring isomer was 5−7 °C lower than that of the open-ring isomer. When asymmetric methylgroups were introduced in the amphiphilic side chains, induced circular dichroism (ICD) was observedupon irradiation with UV light in water. This ICD was explained by the difference in the self-assemblingbehavior between the open- and the closed-ring isomers. It was suggested that the closed-ring isomersassembled into a chiral nanostructure.
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