Enhancement of Chemical Stability and Crystallinity in Porphyrin‐Containing Covalent Organic Frameworks by Intramolecular Hydrogen Bonds

A strong bond: A strategy based on intramolecular hydrogen-binding interactions in 2D covalent organic frameworks (COFs) is shown to improve the crystallinity, porosity, and chemical stability of the material. The concept is validated by removing the hydrogen-bonding interaction in the methoxy analog which showed a lower stability and crystallinity.