Molecular engineering of noncoordinating backbones in Zr-MOFs for ultrasensitive piezofluorochromism-based high pressure sensing.

Authors

Pengxiang Dong, Cha Li, Shiwei Yao, Xin-Ping Gao, Feifan Lang, Kai Wang, Fangna Dai, Jiandong Pang, Xian-He Bu

Published in

Science advances. Volume 12. Issue 45. Pages eaej6039. Nov 06, 2026. Epub Nov 06, 2026.

Abstract

Metal-organic frameworks (MOFs) are promising pressure-responsive luminescent materials, but precise control of their emission under pressure remains a substantial challenge. Here, we engineered the piezofluorochromic response of zirconium-based MOFs by tuning the polarity of the emissive moieties through noncoordinating phenyl substituents. Four isostructural UiO-67 derivatives were synthesized. The most polar ligand, in UiO-67-PA, yields ultrasensitive piezofluorochromism with a bathochromic shift of 190 nanometers per gigapascal below 0.36 gigapascals. This sensitivity arises from two cooperative effects: enhanced conjugation through pressure-driven rotation of the aromatic rings and amplified orbital overlap resulting from polarity-induced electronic redistribution. This work broadens the strategies for modulating MOF luminescence and highlights their potential for pressure sensing.

PMID:
42993819
Bibliographic data and abstract were imported from PubMed on 07 Nov 2026.

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