Simple Way to Fabricate Emissive Boron-Containing Covalent Organic Frameworks

作者：Yuqing Sun, Bo Zhang, Caili Zhang, Huiming Lu, Yuan Yang, Bingyang Han, Fenghao Dong, Jiawei Lv, Shengjun Zhang, Zhao Li, Ziqiang Lei, Hengchang Ma · 发表于：ACS Applied Materials & Interfaces · 年份：2023 · DOI：10.1021/acsami.2c20580 · 被引用次数：15 · 研究领域：Covalent Organic Framework Applications、Luminescence and Fluorescent Materials、Metal-Organic Frameworks: Synthesis and Applications

Highly fluorescent covalent organic frameworks (COFs) are rarely obtained because of the π-π stacked layers with aggregation-caused quenching behavior. Unarguably, highly fluorescent COFs with tunable emission colors are even more rarely achieved. Herein, a general strategy to modify the classical COF material (named COF-1) by different fluorescent molecules via N → B interaction was developed. In this method, the boron-containing COF-1 acted as a porous and crystalline matrix as well as a reaction partner of Lewis acid; after interacting with fluorescent molecules with the anchoring group of pyridine (Lewis base), COF-1 takes a gorgeous transfiguration from a non-emissive powder into a highly fluorescent COF material with tunable emission colors. This disclosed method endowed the typical COFs with new emissive life and is speculated with the general research concept for all boron-containing COFs. Benefiting from the prominent fluorescent emission in the aggregation state, sensitive probes toward amines are achieved.