Ionic Hydrogen-Bonded Organic Frameworks for Ion-Responsive Antimicrobial Membranes.

Functionalization of hydrogen-bonded organic frameworks (HOFs) for specific applications has been a long-lasting challenge in HOF materials. Here, an efficient way to integrate functional species in the HOF structure through constructing an anionic framework is presented. The obtained HOFs, taking PFC-33 (PFC = porous materials from FJIRSM,CAS) as an example, integrate a porphyrin photosensitizer as a porous backbone and a commercial biocide as counterions in the structure. The permanent channels and the electrostatic interaction between the framework and the counterions provide PFC-33 ion-responsive biocide-release behavior in various physiological environments, thus exhibiting synergistic photodynamic and chemical antimicrobial efficiency. The unbonded carboxyl groups residing on the HOF surface further allow for manipulating the interfacial interaction between the PFC-33 and the polymer matrix for membrane fabrication. Therefore, a polyHOF membrane with high stability, desired flexibility, and good permeability is obtained, which demonstrates noticeable bacterial inhibition toward Escherichia coli. This study may shed light on the functionalization of HOF materials for broad application potentials.

Facile one-pot synthesis of porphyrin based porous polymer networks (PPNs) as biomimetic catalysts.

Stable porphyrin based porous polymer networks, PPN-23 and PPN-24, have been synthesized through a facile one-pot approach by the aromatic substitution reactions of pyrrole and aldehydes. PPN-24(Fe) shows high catalytic efficiency as a biomimetic catalyst in the oxidation reaction of 2,2'-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) (ABTS) in the presence of H2O2.

Interpenetrated metal-organic frameworks of self-catenated four-connected mok nets.

We describe two cobalt metal-organic frameworks built by amide derivative and organodicarboxyl co-ligands, displaying 3-fold interpenetration of 6(5).8-mok nets which are 4-connected self-catenated nets described theoretically in the early nineties.