2024年2月10日 · Herein, by converting the imine linkages into quinoline groups of triphenylamine incorporated covalent organic frameworks (COFs), two photosensitive COFs, namely TFPA-TAPT-COF-Q and...

2022年3月17日 · Covalent organic frameworks (COFs) can exhibit high specific surface area and catalytic activity, but traditional solution-based synthesis methods often lead to insoluble...

Due to the excellent ion-sensing potential of covalent organic frameworks (COFs), the new imine-linked conjugated COF (IC-COF) is synthesized through a water-based synthesis reaction between 1,5-diaminonaphthalene and 2,4,6-tris (4-formylphenoxy)-1,3,5-triazine to create a luminescence sensor.

2023年7月19日 · The energy band positions of three COFs derived from XPS valence band spectra combined with Tauc plot indicate the thermodynamic feasibility of oxygen reduction reaction (ORR) to...

There are several approaches to synthesizing COFs, including the solvothermal method, microwave method, sonochemical method, and mechanochemical method. The purpose of this review article is to...

2021年9月1日 · Covalent organic frameworks (COFs), as new promising photocatalysts, have aroused great interests, but the systematic study on the structure–property relationship of COF-photocatalysts is scarcely reported. Herein, six β-keto-enamine-based COFs with different backbones and substituents have been prepared.

共价有机骨架（Covalent Organic Frameworks，COFs）是一类由碳、氮、氢、氧等轻质量元素通过 共价键 结合在一起形成的多孔结晶高分子材料。 目前，COFs材料主要通过硼化学、 席夫碱 化学、三嗪化学等多种可逆反应合成，连接方式开发出数十种，包括环硼氧烷、硼酸酯、硼硅酸盐、三嗪、亚胺、脘、环硼嗪、吩嗪、酰亚胺、酰胺、C=C、超配位硅和1，4- 二噁英 等。 COFs材料具有有序多孔结构、密度低、比表面积高、易于功能化、化学稳定性和热稳定性强等特点，在 …

2022年6月3日 · The surface concentration and chemical state of the elements are determined by X-ray photoelectron spectroscopy (XPS). The XPS spectra (Figure S5, Supporting Information) reveal that C, N, O, and the corresponding metal ions consist of Metal-Salen COF EDA, while a certain amount of Zn 2+ remains in the framework after ion exchange (Figure 3g–l).

We present scanning tunneling microscopy (STM) and X-ray photoelectron spectroscopy (XPS) studies of porphyrin 2D-COFs grown at a solid–vapour interface. XPS shows that covalent links between porphyrins consist of a mixture of imines and hemiaminals, a non-conjugated intermediate in the Schiff-base condensation reaction.

2021年10月1日 · In this work, a novel COFs with bipyridine binding sites (donated as BPD-COFs), strong fluorescence intensity, high surface area and regularity pore canals was prepared. The excellent fluorescence properties were demonstrated by comparing with a small molecule model compound (2, 2’-bipyridine-5, 5’-diiminebenzene, donated as BPDB ...