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Rapidly Diversifying Hydrogen-Bonded Organic Frameworks With Permanent Porosity.

Taito Hashimoto¹, Ichiro Hisaki¹

¹Division of Chemistry, Graduate School of Engineering Science, The University of Osaka, Toyonaka, Osaka, Japan.

Angewandte Chemie (International Ed. in English)

|July 13, 2026

Summary

Hydrogen-bonded organic frameworks (HOFs) have advanced significantly, offering sustainable materials with tunable properties. This review covers HOF evolution, focusing on porosity, structure-property relationships, and multicomponent designs.

Keywords:

hydrogen bond pi‐conjugated molecule porous molecular crystal

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Published on: October 6, 2023

Area of Science:

Materials Science
Chemistry
Crystallography

Background:

Hydrogen-bonded organic frameworks (HOFs) represent a significant advancement in porous molecular crystals (PMCs).
HOFs offer advantages like fewer defects and precise structure-property analysis due to reversible bonding.
They are recognized for their potential as sustainable materials.

Purpose of the Study:

To review the evolution of HOFs, particularly those with permanent porosity, over the past 15 years.
To analyze HOFs based on the molecular structures of their constituent molecules (tectons).
To highlight distinctive aspects including permanent porosity, isostructural libraries, and multicomponent HOFs.

Main Methods:

Review of scientific literature on HOF synthesis and characterization.
Analysis of HOF structures derived from diverse tectons (benzene derivatives, polycyclic aromatics, macrocycles).
Focus on concepts like permanent porosity, isostructural/isoreticular HOFs, and multicomponent HOFs.

Main Results:

HOFs synthesized from a wide range of tectons exhibit diverse structures and properties.
Permanent porosity in both rigid and flexible HOFs is crucial for porous material applications.
Isostructural HOFs enable the creation of continuous libraries, while multicomponent HOFs allow for function tuning.

Conclusions:

HOFs have undergone significant development, driven by diverse tecton choices and structural concepts.
The ability to precisely control structure-property relationships makes HOFs highly promising.
Future directions include leveraging multicomponent HOFs for novel functionalities and enhanced material design.