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Abstract: Using a functional monomer (methyl methacrylate, acrylamide, ethyl acrylate or acrylic acid) and a crosslinker (glycol dimethyacrylate), molecularly imprinted polymers (MIPs) with recognition properties to dibenzoyl-L-tartaric acid (L-DBTA) were prepared by thermal polymerization method in the presence of a template (L-DBTA) in acetonitrile solution. Based on Scatchard analysis, one kind of binding sites was formed in the L-DBTA MIPs. At 293.15 K, its equilibrium constant (Kd) is 0.11 mmol/L while the maximum apparent binding capacity (Qm) is 6.83 mg/g. On the basis of isothermal binding thermodynamic investigation, the recognition mechanism between L-DBTA and MIP recognition group was described by Langmuir isothermal binding. Therefore, some thermodynamic parameters are obtained: Δ H=8.05 kJ/mol, Δ S=45.85 J/(mol K), Δ G298.15 = -5.62 kJ/mol, Δ Δ H=-1.49 kJ/mol, Δ Δ S=3.55 J/(mol K) and Δ Δ G298.15 = -2.55 kJ/mol. The kinetic analysis illustrates that the interaction between L-DBTA and MIP is very fast and the apparent activation energy is 8.05 kJ/mol
Template and target information: dibenzoyl-L-tartaric acid, L-DBTA
Author keywords: chiral recognition, Dibenzoyl-L-tartaric acid, molecular imprinting polymer, Thermal polymerization, thermodynamics