Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

A Flexible Microporous Hydrogen-Bonded Organic Framework for Gas Sorption and Separation



Hailong Wang, Bin Li, Hui Wu, Tong-Liang Hu, Zizhu Yao, Wei Zhou, Shengchang Xiang, Banglin Chen


A microporous three-dimensional hydrogen-bonded organic framework (HOF-5) has been constructed from a new organic linker 4,4'r", r"'(2,4-diamino-1,3,5-triazin-6-yl)tetraphenylethene. Activated HOF-4a exhibits a stepwise N2 adsorption isotherm at 77 K, suggesting framework flexibility. The structure of activated HOF-5a has been established by powder X-ray diffraction studies, indicating a significant framework contraction from as-synthesized HOF-4 to activated HOF-4a of 21% by volume. HOF-5a shows moderately high porosity with a Brunauer Emmett Teller (BET) surface area of 1101 m2/g, and takes up a large amount of acetylene and carbon dioxide under ambient conditions. Powder neutron diffraction studies and theoretical calculations reveal that suitable pore sizes, curvatures, and functional sites collectively enable HOF-5a to encapsulate a high density of carbon dioxide molecules packed in a pseudo-one-dimensional array along the pore channel.
Journal of the American Chemical Society


Hydrogen-Bonded Organic Framework, porous material, gas adsorption


Wang, H. , Li, B. , Wu, H. , Hu, T. , Yao, Z. , Zhou, W. , Xiang, S. and Chen, B. (2015), A Flexible Microporous Hydrogen-Bonded Organic Framework for Gas Sorption and Separation, Journal of the American Chemical Society, [online], (Accessed March 4, 2024)
Created August 11, 2015, Updated October 12, 2021