Related Experiment Video
Updated: Aug 11, 2026
Surface Functionalization of Metal-Organic Frameworks for Improved Moisture Resistance
Published on: September 5, 2018
Y-Shaped Fluorinated Metallo-Polyzwitterion from Cobaltocenium: Facile Synthesis and Enhanced Antifouling Performance
Yuankang Liu1, Shida Hou1, Yunxin Xu1
1Department of Chemistry, School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, Northwestern Polytechnical University, Xi'an710129, P. R. China.
None:
A Y-shaped fluorinated metallo-zwitterionic monomer NB-Co+-STFSI- with cobaltocenium as the cationic group and sulfonyl(trifluoromethylsulfonyl) imide anion (STFSI, -SO2N(-)SO2CF3) as the anionic group was synthesized via catalyst-free hydroamination and polymerized via ring-opening metathesis polymerization (ROMP) to give the corresponding fluorinated metallo-polyzwitterion, PNB-Co+-STFSI-. In such a zwitterionic system, the introduction of both the hydrophilic cobaltocenium and hydrophobic fluorocarbon unit of STFSI enables the regulation of hydration properties, leading to distinct solution and surface properties that deviate from those of conventional zwitterionic polyelectrolytes. Although the resulting polymer is water-insoluble, the PNB-Co+-STFSI- coating exhibits strong surface hydrophilicity. Using a simple dip-coating process, the PNB-Co+-STFSI- coatings adhere stably to various substrates and demonstrate exceptional antifouling performance, reducing bacterial adhesion by >95% and suppressing protein adsorption to <5% within 8 h; even after 72 h, protein adsorption remains below 15%. This work not only expands the family of zwitterionic polymers but also opens new avenues for the design of advanced antifouling materials.
