Research on Synthesizing 2-(2'-Hydroxylphenyl) Benzothiazole and Their Fluorescent Properties

hydroxyphenyl)benzothiazole and 2 (3' hydrxyonaphthalen 2' yl) benzothiazole were synthesized via cyclizing o aminophenthiol with salicylic acid and 2 hydroxyl 3 naphthenlic acid, respectively. Their structures were identified by MS, 1H NMR,IR, and element analysis. In addition, the crystal forms of 2 (2' hydroxylphenyl) benzothiazole were measured by X ray powder diffraction, and the relationship between crystal forms and fluorescence properties was discussed as well. The result shows that they are the intermolecular proton transfer compounds. In solid state under UV light, 2 (2' hydroxylphenyl)benzothiazole emits strong yellowish green fluorescence, while 2 (3' Hydrxyonaphthalen 2' yl) benzothiazole shows no fluorescence.