Space-Confined Water Isotope Transport in Conductive MOF Thin Film.

Authors

Sai Chu, Jiahui Guo, Meiling Qi, Qiaozhi Li, Jiajia Zheng, Ken-Ichi Otake, Wenqi Xu, Rosantha Kumara, Xi Wang, Xiuyan Qiu, Tianfei Chu, Kuo Liu, Susumu Kitagawa, Zongxian Yang, Long Chen, Ming-Shui Yao

Published in

Angewandte Chemie (International ed. in English). Pages e7017206. Sep 01, 2026. Epub Sep 01, 2026.

Abstract

The century-old challenge of isotope separation might be addressed by conductive metal-organic framework (cMOF) thin films featuring ordered nanopores, designable charge-transport pathways, and potential flexibility. However, resolving and amplifying the microscopic kinetic differences between water isotopologues within such confined spaces remains nontrivial. In this work, proton- and electron-coupled two-dimensional π-conjugated cMOF thin films (Cu₁TPB_0.1-xC) are fabricated through controllable layer-by-layer growth with oriented narrow pores and flexibility. Correlating electrical- and mass-transduced gas-sensor technologies, the subtle differences in the interactions of H₂O and D₂O with the framework were identified, revealing a complex multistage mass transport. Comparison of cMOFs with different pore sizes shows that this identification originates from distinct conduction mechanisms. Notably, the Cu₁TPB_0.1-xC thin film with a strong space-confined effect exhibits a complex multistage electrical response due to its unique proton-electron-coupled conduction characteristics, thereby enabling further differentiation of the transport processes of H₂O and D₂O on the outer surface and within the confined spaces. The oriented cMOF films therefore provide a real-time platform for resolving and amplifying subtle isotope-dependent transport dynamics in confined pores, offering mechanistic guidance for the design of porous materials with controlled water-isotopologue transport.

PMID:
42677872
Bibliographic data and abstract were imported from PubMed on 01 Sep 2026.

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