Self‐Assembly of a Bilayer 2D Supramolecular Organic Framework in Water

Abstract

Accurate control of the layer number of orderly stacked 2D polymers has been an unsettled challenge in self‐assembly. Herein we describe the fabrication of a bilayer 2D supramolecular organic framework from a monolayer 2D supramolecular organic framework in water by utilizing the cooperative coordination of a rod‐like bipyridine ligands to zinc porphyrin subunits of the monolayer network. The monolayer supramolecular framework is prepared from the co‐assembly of an octacationic zinc porphyrin monomer and cucurbit[8]uril (CB[8]) in water through CB[8]‐encapsulation‐promoted dimerization of 4‐phenylpyridiunium subunits that the zinc porphyrin monomer bear. The bilayer 2D supramolecular organic framework exhibits structural regularity in both solution and the solid state, which is characterized by synchrotron small‐angle X‐ray scattering and high‐resolution transmission electron microscopic techniques. Atomic force microscopic imaging confirms that the bilayer character of the 2D supramolecular organic framework can be realized selectively on the micrometer scale.

Polyaniline-decorated porous carbons with engineered meso/macrochannels for high performance capacitive deionization

“…Constructing meso/macroporous channels within PAC by surface/structure engineering accelerates the electrochemical kinetics. 19,20 The amplied pores can serve as the ion-buffer reservoirs to shorten the diffusion distance from the bulk electrolyte solution to the inner structures of the electrode materials. 18 Furthermore, the enlarged pore size also enhances the ion storage capacity and enriches the ion transport pathways.…”

“…18 Furthermore, the enlarged pore size also enhances the ion storage capacity and enriches the ion transport pathways. 19 In this regard, if confined meso/macroporous channels could be introduced to the PAC, the aforementioned drawbacks in PANI/PAC would be effectively eliminated. Herein, we synthesized PANI/PAC electrode materials with rich internal meso/macroporous channels by employing asphalt wastes as the carbon precursor.…”