A new backbone of artificial enzymes obtained by cross-linkage of Poly(ethylenimine)

Cross-linkage of the branches of poly(ethylenimine) (PEI) suppresses flexibility of the polymer as revealed by decreased affinity of the amino groups on PEI backbone towards proton orNi(II) ion. The cross-linkage improves ability of the PEI derivative equipped with β-cyclodextrin to deacylate an ester containing t-butylphenyl moiety.