Influence of cross-linking monomer and hydrophobic styrene comonomer on stereoselective esterase activities of polymer catalyst imprinted with a transition-state analogue for hydrolysis of amino acid esters

Catalytic amidolysis of amino acid p-nitroanilides using transition state analogue imprinted artificial enzymes: Cooperative effect of pyridine moiety

Enzyme-like polymer catalysts with the imprints of phosphonate transition state analogue (TSA) lined along with imidazole and pyridine moieties were synthesized using methacryloyl-l-histidine and 4-vinylpyridine as the functional monomers and phenyl-1-(N-benzyloxycarbonylamino)-2-(phenyl)ethyl phosphonate - the TSA of hydrolytic reaction as the template for the amidolysis of N-benzyloxycarbonyl-l-phenylalanine p-nitroanilide (Z-l-Phe-PNA). Polymers containing different functional groups can act together to provide catalytic activity and selectivity superior to what can be obtained from monofunctional analogues. The higher rate acceleration exhibited by the bifunctional polymer over the monofunctional polymers indicates cooperative catalysis of imidazole and pyridine moieties. The optimum catalytic competence is shown by the bifunctional polymer containing imidazole and pyridine moieties in 2:1M ratio which may be due to alignment of the functional groups in proper H-bond distance. In addition to the non-covalent interactions like hydrogen bonding or π-stacking interactions between the functional groups of the polymer and the template, 3D-microcavities complementary to the geometry of the template are necessary for effective shape selective binding. Michaelis-Menten kinetics implies that only the catalysts with imidazole moieties act as enzyme-like catalysts and imidazole is the key catalytic function of the enzyme mimics.

Molecular imprinting science and technology: a survey of the literature for the years up to and including 2003

Over 1450 references to original papers, reviews and monographs have herein been collected to document the development of molecular imprinting science and technology from the serendipitous discovery of Polyakov in 1931 to recent attempts to implement and understand the principles underlying the technique and its use in a range of application areas. In the presentation of the assembled references, a section presenting reviews and monographs covering the area is followed by papers dealing with fundamental aspects of molecular imprinting and the development of novel polymer formats. Thereafter, literature describing attempts to apply these polymeric materials to a range of application areas is presented.