2022年4月6日 · Here we present a reconstruction strategy for COF synthesis that uses a reversible and removable covalent tether to pre-organize monomers before an irreversible polymerization. This route yields...

2024年2月29日 · Covalent organic frameworks (COFs) are ideal templates for constructing metal-free catalysts for the oxygen reduction reaction due to their highly tuneable skeletons and...

2023年2月28日 · Covalent organic framework (COF) is a class of organic polymers linked by reversible covalent bonds. COFs have highly periodic and modular crystalline structures, defining...

2025年1月14日 · 【要点1】 通过后氧化法成功合成了具有稳定中性碳自由基中心的共价有机框架（COF）材料（COF-R）。 这种材料在保持结晶性的同时，实现了碳自由基的稳定存在；

2024年10月23日 · Similar chemical shifts are observed for N3-COF (Fig. S1 †). Fourier-transform infrared (FTIR) spectra of the materials reveal characteristic stretching bands (Fig. 1b and S2 †), with bands at 1579 cm−1 and 1503 cm−1 corresponding to the CN Schiff base bonds and aromatic triazine CN bonds, respectively.

2020年4月1日 · Here, based on our proposed strategy, we design and report a BQ1-COF consisting of maximum active groups (C=O and C=N) with minimal inactive groups, which when used as cathode materials for lithium-ion batteries give a reversible capacity of 502.4 mA h g−1 at 0.05C, so far the highest capacity among polymer-based cathode materials.

2024年7月16日 · 作者通过PXRD，FTIR，13C solid-state NMR、电镜等手段表征了COFs材料的形成。 进一步，通过将结构模拟结果与实验结果对比，证明了TAPP-PBTD-COF具有mcm拓扑结构。 值得一提的是，作者通过冷冻电镜对TAPP-PBTD-COF的结构进行了表征。

3 天之前 · In FT-IR spectra of UiO-66-NH 2, TFPB-TAPA COF, and UiO@TBTA as shown in Figure 2 a, the typical absorption peaks at 766 and 664 cm -1 in UiO-66-NH 2 corresponded to Zr-O bonds while the peaks at 3454 and 3362 cm -1 belonged to the N-H stretching vibration of primary amines (-NH 2), which provided additional active sites for the growth of TFPB ...

通过傅里叶变换红外光谱 (FTIR)和X射线光电子能谱 (XPS)进一步揭示了COF部分的氧化还原反应机制，涉及锂离子与C=N基团的可逆氧化还原反应以及苯环中不饱和C=C键的逐步电化学活化。

4 天之前 · In this work, we demonstrate a well-defined, ultrathin, two-dimensional (2D) COF with alternatively distributed porphyrin building blocks connected through amine bonds. This polar conjugated framework was confirmed to manipulate the adsorption energetics of ∗CO and improve CO 2 -to-CO conversion.