title: Preparation and Ion Recognition Characteristics of a Trichloroacetic Acid Surface-Imprinted Material.
abstract: In this work, a trichloroacetic acid (TCAA) surface-imprinted material with high performance was prepared. In an aqueous solution, the molecules of the cationic monomer acryloyloxyethyl-trimethyl ammonium chloride (DAC) arranged around the template TCAA anion via electrostatic interaction. By initiating of the surface-initiating system of -NH2/S2O8(2-), the graft/cross-linking polymerization of DAC and the crosslinker N,N'-Methylenebisacrylamide and the TCAA surface-imprinting were simultaneously carried out on SiO2 particles, forming TCAA anion surface-imprinted material IIP-PDAC/ SiO2. With monochloroacetic acid (MCAA) and phenylacetic acid (PAA) as two contrast acids, the recognition character of the imprinted material IIP-PDAC/SiO2 was investigated. This imprinted material possesses special recognition selectivity and excellent binding affinity for TCAA anion. The binding amount of IIP-PDAC/SiO2 particles for TCAA reaches 0.93 mmol/g, whereas their binding amounts for MCAA and PAA are only 0.48 mmol/g and 0.15 mmol/g, respectively. The selectivity coefficients of IIP-PDAC/SiO2 for TCAA relative to MCAA and PAA anions are 3.61 and 9.12, respectively.
authors.forename: Baojiao
authors.initials: B
authors.lastname: Gao
authors.forename: Tintin
authors.initials: T
authors.lastname: Zhang
authors.forename: Tao
authors.initials: T
authors.lastname: Chen
mesh_terms: D000178:Acrylamides; D000327:Adsorption; D055664:Electrochemical Techniques; D006860:Hydrogen Bonding; D006863:Hydrogen-Ion Concentration; D007477:Ions / Q000737:chemistry; D054802:Molecular Imprinting; D011108:Polymers / Q000737:chemistry; D012822:Silicon Dioxide / Q000737:chemistry; D013499:Surface Properties; D014238:Trichloroacetic Acid / Q000737:chemistry*; D014867:Water / Q000737:chemistry
chemical_list: D000178:Acrylamides; D007477:Ions; D011108:Polymers; D014867:Water; D014238:Trichloroacetic Acid; D012822:Silicon Dioxide; C021221:N,N'-methylenebisacrylamide