Self‐Assembly of Photochromic Diarylethenes with Amphiphilic Side Chains: Core‐Chain Ratio Dependence on Supramolecular Structures |
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| Authors: | Takashi Hirose Masahiro Irie Prof Kenji Matsuda Prof |
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| Institution: | 1. Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, Motooka 744, Nishi‐ku, Fukuoka 819‐0395 (Japan);2. Department of Chemistry, Rikkyo University, Nishi‐Ikebukuro 3‐34‐1, Toshima‐ku, Tokyo 171‐8501 (Japan);3. Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo‐ku, Kyoto 615‐8510 (Japan), Fax: (+81)?75‐383‐2739 |
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| 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. |
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| Keywords: | circular dichroism hydrophobic effect molecular modeling photochromism self‐assembly |
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