Green synthesis of o-hydroxyazobenzene porous organic polymer for efficient adsorption of aromatic compounds

Abstract This work presents a simple and eco-friendly synthetic approach to fabricate a novel o -hydroxyazobenzene porous organic polymer (HAzo-POP) by diazo-coupling of 2,6-diaminoanthraquinone with m -trihydroxybenzene in aqueous solution. The prepared HAzo-POP possesses good stability and high adsorption capability towards aromatic organic pollutants due to its porous nature, highly conjugated structure and strong hydrogen bonding ability. The HAzo-POP was successfully used for the solid-phase extraction of phenylurea herbicides from six real samples prior to high performance liquid chromatography with ultraviolet detection. The analytical method showed good linearity in the range of 0.5-160.0 ng g −1 for celery, lettuce and tomato samples, and 0.4–160.0 ng mL −1 for milk, soybean milk and juice samples, with low limits of detection in the range from 0.05 to 0.30 ng g −1 (or mL −1 ). The HAzo-POP has a promising application potential for the adsorption of more aromatic organic compounds.