Study on Recognition of Metallic Ions by a Photo-Sensitivity Liquid Crystal of Ethylcyclohexyl Acyloxy Azobenzoic Acid

A ethyl cyclohexanyloxy azobenzoic acid molecule constructed by liquid crystalline structure was synthesized as a sample in this paper. The compound was a multi-functional molecule with liquid crystalline and photo-sensitive properties. The recognition of some divalent metallic ions such as Fe, Mn, Ba, Pb, Cu by this compounds were researched by UV spectrometry. The mole ratio of 1 to 3 in a solvent of methanol were better condition to conduct this process. The result showed the azo liquid crystal molecule can recognize common divalent ions (Fe, Mn, Ba, Pb, Cu). A strong recognition was exhibited between the azo liquid crystal molecules and Cu ion. Keywords-liquid crystal; photographic materials; azo; metallic ions