@article{Zhao2026, 
author = {Li Zhao and Chunhui Chen and Chiran Wang and Yuan Zhao and Jianquan Wang and Hang Su and Yuchen Hua and Jingyun Jiang and Pengfei Yan and Bo Liu},
title = {Hydrogen-bonded ionic framework with ultrafine adaptive pores for selective gas adsorption},
year = {2026},
journal = {Nano Research},
volume = {19},
number = {9},
pages = {94908678},
keywords = {hydrogen-bonded ionic frameworks (HIFs), watermelon-sesame assembly strategy, stimuli-responsive, gate-opening, CO2 selective adsorption},
url = {https://www.sciopen.com/article/10.26599/NR.2026.94908678},
doi = {10.26599/NR.2026.94908678},
abstract = {The development of hydrogen-bonded frameworks with both robust stability and adaptive functionality remains a significant challenge. Herein, we report a series of hydrogen-bonded ionic frameworks (HIFs) constructed via a supramolecular assembly strategy, utilizing bulky cationic Zn(II) coordination complexes and small inorganic anions. Directional charge-assisted hydrogen bonds effectively suppress close packing and yield robust architectures, with adaptive porosity under external stimuli owing to relatively weak interactions. Notably, HIF-23 exhibits a sophisticated guest-induced gate-opening effect, specifically triggered by the CO2 with quadrupole moment. Comprehensive density functional theory (DFT) simulations and spectroscopic analyses reveal that the transition is driven by a localized conformational twisting of propane bridges and adaptive nature of the hydrogen-bonding network. The specific interaction with CO2 enables high CO2/CH4 and CO2/N2 selectivity, complemented by a substantial high-pressure CO2 capacity of 30.4 wt.% at 50 bar. This work underscores the potential of the HIF platform for the precision engineering of stimuli-responsive materials tailored for energy-efficient carbon capture.}
}