2000•Molecular crystals and liquid crystals science technology. Section A, Molecular crystals and liquid crystals/Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystalsRequires access
Photoisomerization of Azobenzene Derivatives at the Air/Water Interface
Yun Ok Oh, Hang Youn Jung, Young Soo Kang
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Abstract
The photoisomerization of azobenzene derivative on the substrate requires a sufficient area to prevent stacking by the aggregation of azobenzene chromophores. In order to overcome such a close stacking of azobenzene chromophores, the azobenzene derivative (8-[4-[4′-octylphenyl]azo]phenoxy]decyl pyridinium salt, 8Az10py) with positively charged head group was synthesized and used after purification. The photoisomerization of 8Az10py was investigated with pressure-area isotherms, surface potential-area isotherm curves and BAM images of a 1:2 mixture of 8Az10py and cholesterol at the air/water interface.