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Visible‐Light‐Induced Morphological Changes of Giant Vesicles by Photoisomerization of a Ruthenium Aqua Complex
Authors:Dr Masanari Hirahara  Prof Akira Tsukamoto  Hiroki Goto  Shigeru Tada  Prof Masayuki Yagi  Prof Yasushi Umemura
Institution:1. Department of Applied Chemistry, School of Applied Science, National Defense Academy of Japan, Yokosuka, Kanagawa, Japan;2. Department of Applied Physics, School of Applied Science, National Defense Academy of Japan, Japan;3. Department of Materials Science and Technology, Faculty of Engineering, Niigata University, Niigata, Japan
Abstract:Visible‐ and red‐light responsive vesicles were prepared by incorporating a ruthenium aqua complex having two alkyl chains on tridentate and asymmetrical bidentate ligands (proximal‐ 2 : Ru(C10tpy)(C10pyqu)OH2]2+, C10tpy=4′‐decyloxy‐2,2′;6′,2“‐terpyridine, C10pyqu=2‐2′‐(6′‐decyloxy)‐pyridyl]quinoline). The ruthenium complex of proximal‐ 2 with closed alkyl chain geometry and a cylinder‐like molecular shape exhibited photoisomerization to distal‐ 2 with an open alkyl chain geometry and a cone‐like shape, both in an aqueous solution and in vesicle dispersions. We observed that light irradiation of giant vesicles containing proximal‐ 2 induced diverse morphological changes.
Keywords:aqua complexes  morphology  photoisomerization  ruthenium  vesicles
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