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Synthesis of Vinylene-Linked Thiopyrylium-, Pyrylium-, and Pyridinium-Based Covalent Organic Frameworks by Acid-Catalyzed Aldol Condensation.

Haifeng JiGaojie YanPeng ZouHan WangMengke LiYi FengXiongwei QuDongling GengJingjing ShiXiaojie Zhang
Published in: Chemistry (Weinheim an der Bergstrasse, Germany) (2022)
The development of new vinylene-linked covalent organic frameworks (COFs) with special ionic structure and high stability is challenging. Herein, we report a facile, general method for constructing ionic vinylene-linked thiopyrylium-based COFs from 2,4,6-trimethylpyrylium tetrafluoroborate and other common reagents by means of acid-catalyzed Aldol condensation. Besides, pyrylium-, and pyridinium-based COFs also can be prepared from the same monomer under slightly different reaction conditions. The COFs exhibited uniform nanofibrous morphologies with excellent crystallinities, special ionic structures, well-defined nanochannels, and high specific surface areas.
Keyphrases
  • ionic liquid
  • room temperature
  • solid state
  • high resolution
  • water soluble
  • quantum dots
  • gold nanoparticles
  • tissue engineering
  • simultaneous determination