Vitrification-Devitrification Enables Tunable Photonic and Gas Sorption Properties of Zeolitic Imidazolate Frameworks
Abstract
Zeolitic imidazolate framework (ZIF) glasses represent an emerging family of melt-quenched glasses, which exhibit immense potential for applications in gas separation, energy storage, and optics. However, their intrinsic porosity remains elusive due to the inherent challenges in resolving their disordered atomistic structures. Here, we systematically investigate the porosity of ZIF-4 and ZIF-62 crystals and their corresponding glasses. CO2 sorption at 195 K enables quantitative assessment of microporosity in both crystalline and glassy states, allowing the accessible micropore volume of the ZIF glasses to be determined. Moreover, establishing a direct relationship between photonic properties and structural porosity in Zn-based ZIF glasses remains challenging. Here we demonstrate striking broadband blue-light emission from ZIF-4 glass annealed under optimized conditions. A pronounced red shift is observed when increasing the annealing temperature above the glass transition temperature. By correlating the evolution of photoluminescence with structural porosity, we reveal the interplay between the photonic and gas sorption properties of ZIF glasses. These findings provide new insights into the structure-property relationships of ZIF glasses and offer a pathway toward the rational design of multifunctional MOF glasses.
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BibTeX
@misc{li2026vitrificationdevitrification,
title = {{Vitrification-Devitrification Enables Tunable Photonic and Gas Sorption Properties of Zeolitic Imidazolate Frameworks}},
author = {Zhencai Li and Zihao Wang and Minhyuk Kim and Huotian Zhang and Bozhao Yin and Yong Li and Qi Zhang and Fengming Cao and Xuan Ge and Laurent Calvez and Daniel Irving and Guoping Dong and Feng Gao and Haomiao Zhu and Morten M. Smedskjaer and Hoi R. Moon and Yuanzheng Yue},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.02287},
eprint = {2609.02287},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.02287},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Vitrification-Devitrification Enables Tunable Photonic and Gas Sorption Properties of Zeolitic Imidazolate Frameworks
AU - Zhencai Li
AU - Zihao Wang
AU - Minhyuk Kim
AU - Huotian Zhang
AU - Bozhao Yin
AU - Yong Li
AU - Qi Zhang
AU - Fengming Cao
AU - Xuan Ge
AU - Laurent Calvez
AU - Daniel Irving
AU - Guoping Dong
AU - Feng Gao
AU - Haomiao Zhu
AU - Morten M. Smedskjaer
AU - Hoi R. Moon
AU - Yuanzheng Yue
PY - 2026
DA - 2026/09/02
PB - arXiv
DO - 10.48550/arxiv.2609.02287
UR - https://arxiv.org/abs/2609.02287
AB - Zeolitic imidazolate framework (ZIF) glasses represent an emerging family of melt-quenched glasses, which exhibit immense potential for applications in gas separation, energy storage, and optics. However, their intrinsic porosity remains elusive due to the inherent challenges in resolving their disordered atomistic structures. Here, we systematically investigate the porosity of ZIF-4 and ZIF-62 crystals and their corresponding glasses. CO2 sorption at 195 K enables quantitative assessment of microporosity in both crystalline and glassy states, allowing the accessible micropore volume of the ZIF glasses to be determined. Moreover, establishing a direct relationship between photonic properties and structural porosity in Zn-based ZIF glasses remains challenging. Here we demonstrate striking broadband blue-light emission from ZIF-4 glass annealed under optimized conditions. A pronounced red shift is observed when increasing the annealing temperature above the glass transition temperature. By correlating the evolution of photoluminescence with structural porosity, we reveal the interplay between the photonic and gas sorption properties of ZIF glasses. These findings provide new insights into the structure-property relationships of ZIF glasses and offer a pathway toward the rational design of multifunctional MOF glasses.
ER -