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Self‐Assembly of Photochromic Diarylethenes with Amphiphilic Side Chains: Core‐Chain Ratio Dependence on Supramolecular Structures
Author(s) -
Hirose Takashi,
Irie Masahiro,
Matsuda Kenji
Publication year - 2009
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.200800340
Subject(s) - photochromism , side chain , amphiphile , supramolecular chemistry , ethylene glycol , diarylethene , spectroscopy , self assembly , chemistry , polymer chemistry , absorption (acoustics) , photochemistry , materials science , molecule , organic chemistry , copolymer , polymer , physics , quantum mechanics , composite material
Abstract Photochromic diarylethene derivatives having different lengths and numbers of poly(ethylene glycol) side chains were synthesized and their photochromic property and self‐assembling behavior were investigated. The self‐assembling behavior of the derivatives strongly depends upon the ratio between the hydrophobic core and the amphiphilic side chain. According to UV/Vis absorption spectroscopy, CD spectroscopy, and dynamic light scattering experiments, these derivatives showed different size distribution of the assembled structures and different solubility in water. The intensity of the induced CD signal, which was observed in the closed‐ring isomer, was the largest for the molecule having two hexaethylene glycol side chains. The relationship between the core‐chain ratio and regularity of the self‐assembled structure has been investigated.