A new catalyst,iron(Ⅱ) chelate of the schiff base derived from β-Ala and picoline,was successfully used for atom transfer radical polymerization.The reaction was carried out at 90℃ in bulk with ethyl 2-bromo-2-ethylpropionate as the initiator.The molecular weight of the resulting polymer increases with increasing monomer conversion.The molecular weight distribution is not narrow(PDI=1.5～1.7),and the value of molecular weight detected is in good accordance with the calculated.The molecular weight distribution is 1.13 with the addition of 10% DMF.
The study on separation of bilirubin by liquid membrane showed that ethyl acetate is an appropriate carrier for bilirubin, its clearance efficiency for bilirubin is 99 9% in 0.1 mol/L aqueous phosphate buffer and 83% in simulated human serum albumin solution. In comparison with the adsorption of bilirubin by macroporous resins, liquid membrane possesses the merits of more rapid separation rate and higher clearance efficiency.
