To develop multifunctional protein
imprinted materials, a cobalt-iron
double ion-BSA directional chelation-assisted thermo-sensitive surface-imprinted
hollow nanocage (Co-Fe@CBMA-MIPs) with excellent specificity is developed
on the surface of ZIF-67@Co-Fe in this study by synergizing the advantages
of surface imprinting, metal ion chelation, anti-protein adsorption
segments, and thermo-sensitive components. Beyond previous research,
well-designed multifunctional protein-imprinted materials possess
high binding capacity, fast adsorption kinetics, and outstanding selectivity.
When the adsorption is carried out at 32 °C, the adsorption capacity
of Co-Fe@CBMA-MIPs for BSA reaches 520.35 mg/g within 50 min. The
imprinting factor is 8.55. The selectivity factors of Co-Fe@CBMA-MIPs
for HSA, Bhb, OVA, and Lyz are 3.72, 6.09, 4.10, and 8.41, respectively.
More significantly, Co-Fe@CBMA-MIPs could specifically recognize BSA
from mixed proteins and actual samples and exhibit excellent repeated
use stability. Based on the above advantages, the development of this
research provides an effective means to improve the recognition specificity
of molecularly imprinted polymers.
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