Reported is the synthesis, characterization, and material properties of the first π-conjugated two-dimensional covalent organic radical framework (CORF), PTM-CORF, based on the stable polychlorotriphenylmethyl (PTM) radical. The covalent organic framework (COF) precursor (PTM-H-COF) was first synthesized by liquid/liquid interfacial acetylenic homocoupling of a triethynylpolychlorotriphenylmethane monomer, and showed crystalline features with a hexagonal diffraction pattern matching that of A-B-C stacking. Subsequent deprotonation and oxidation of the PTM units in PTM-H-COF gave PTM-CORF. Magnetic measurements revealed that the neighboring PTM radicals in the PTM-CORF are anti-ferromagnetically coupled each other, with a moderate exchange interaction (J=-375 cm ). The PTM-CORF has a small energy gap (ca. 0.88 eV) and a low-lying LUMO energy level (-4.72 eV), and exhibits high electrocatalytic activity and durability toward the oxygen reduction reaction.

Wu and colleagues describe the synthesis of 1,3,5-triazine-linked porous organic radical frameworks by thermal or triflic acid assisted polymerization from the cyano-containing stable radical monomers. The radicals in the polymers are ferromagnetically coupled with each other through the newly formed 1,3,5-triazine connector. As a result, these materials exhibited spontaneous magnetization or superparamagnetism at room temperature.

A selenium-containing small molecule is exploited to controllably tune the polymer amphiphilicity, leading to fabrication of appropriate polymer surfactants through which one-step double emulsions can be obtained in a facile, scalable, surfactant-free approach. After solvent evaporation, these resulting porous microparticles are shown to be the exceptional artificial GPx enzyme mimics.

Double emulsion has attracted intense scientific investigation on account of its use in a wide range of applications. However, the process of its solidification is usually accompanied by the problem of uncontrollable phase separation. In this work, a supramolecular route is proposed to manage the phase separation in double emulsion. Different degrees of phase separations, from complete wetting to partial wetting and complete dewetting, have been achieved in an emulsion system consisting of P4VP-oleic acid. Partial wetting offers a strategy for generating polymer particles with controllable anisotropic structures. It is demonstrated that the amphiphilicity of polymer matrix, relying on the change of polymer-acid ratio or the chain length of aliphatic acid, is of vital importance for determining the degree of phase separation. A spreading and wetting theory is established to predict and explain the formation of partial wetting.

A dynamic interfacial printing technique (DIP) is developed for preparing monodisperse droplets and polymer particles with high degree of uniformity. The DIP system is cost effective and it can be set up in a few minutes. The printing pipeline endures almost all the organic solvents, offering great promise for exploiting functional droplets or particles with long‐term service.

Reported is the synthesis,c haracterization, and material properties of the first p-conjugated two-dimensional covalent organic radical framework (CORF), PTM-CORF, based on the stable polychlorotriphenylmethyl (PTM) radical. The covalent organic framework (COF) precursor (PTM-H-COF)w as first synthesized by liquid/liquid interfacial acetylenic homocoupling of atriethynylpolychlorotriphenylmethane monomer,a nd showed crystalline features with ah exagonal diffraction pattern matching that of A-B-C stacking.S ubsequent deprotonation and oxidation of the PTM units in PTM-H-COF gave PTM-CORF.M agnetic measurements revealed that the neighboring PTM radicals in the PTM-CORF are antiferromagnetically coupled each other,w ith am oderate exchange interaction (J = À375 cm À1 ). The PTM-CORF has as mall energy gap (ca. 0.88 eV) and al ow-lying LUMO energy level (À4.72 eV), and exhibits high electrocatalytic activity and durability towardt he oxygen reduction reaction.Supportinginformation and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.

Solid materials for CO capture and storage have attracted enormous attention for gaseous separation, environmental protection, and climate governance. However, their preparation and recovery meet the problems of high energy and financial cost. Herein, a controllable CO capture and storage process is accomplished in an emulsion-templated polymer foam, in which CO is breathed-in under dark and breathed-out under light illumination. Such a process is likely to become a relay of natural CO capture by plants that on the contrary breathe out CO at night. Recyclable CO capture at room temperature and release under light irradiation guarantee its convenient and cost-effective regeneration in industry. Furthermore, CO mixed with CH is successfully separated through this reversible breathing in and out system, which offers great promise for CO enrichment and practical methane purification.

Heteroatom-doped carbon-based materials are of significance for clean energy conversion and storage because of their fascinating electronic properties, low cost, high durability, and environmental friendliness. Atomically precise fabrication of carbon-based materials with well-defined heteroatom-dopant positions and atomic-scale understanding of their atomic-level electronic properties is a challenge. Herein, we demonstrate the bottom-up on-surface synthesis of 1D and 2D monolayer carbon nitride nanostructures with precise control of the nitrogen-atom doping sites and pore sizes. We also observe an electronic band offset at the C−N heterojunction. Using highresolution scanning tunneling microscopy, the atomic structure of the as-prepared carbon nitride nanoporous monolayers are revealed, indicating successful and precise control of the structures and N atom doping sites. Furthermore, corroborated by theoretical calculations, scanning tunneling spectroscopy measurements reveal a valence band shift of 140 meV that results in an electric field of 2.9 × 10 8 V m −1 at the C−N heterojunction, indicating efficient separation of the electron−hole pair at the N doping site. Our finding offers direct atomic-level insights into the local electronic structure of the heteroatom-doped carbon-based materials.