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Solvation Effects With a Photoresponsive Two-Component 12-hydroxystearic Acid-Azobenzene Additive Organogel

Solvation Effects With a Photoresponsive Two-Component 12-hydroxystearic Acid-Azobenzene Additive Organogel

Frederic Delbecq, Nobuhiro Kaneko, Hiroshi Endo, Takeshi Kawai

J Colloid Interface Sci. 2012 Oct 15;384(1):94-8.

PMID: 22819394

Abstract:

A "light-triggerable" azobenzene amine derivative (additive 1) was synthesized and then introduced into organogels of 12-hydroxystearic acid (HSA) in the molar ratio of 1:3. The organogels (HSA/1) consisting of additive 1 and HSA were analyzed by (1)H nuclear magnetic resonance (NMR), Fourier transform-infrared (FT-IR), and X-ray diffraction (XRD). The homogeneity of the gel networks was observed using field emission scanning electron microscopy (FE-SEM). Additive 1 formed a complex with HSA in HSA organogels due to salification between the terminal amine group of additive 1 and the carboxylic acid group of HSA. Additive 1 in the gels of HSA/1 showed the potential for photo-isomerization, and we achieved a reversible control of HSA/1 sol-gel transition in toluene by the alternating irradiation with UV and visible light. Interestingly, the opposite phenomenon was observed in CHCl(3) system, namely, the orange solution of HSA/1 in CHCl(3) was turned to a red-transparent gel by exposure to UV light.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP106149-A	12-Hydroxystearic acid		106-14-9	Price

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