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Synthesis of Triazole and Tetrazole-Functionalized Zr-Based Metal-Organic Frameworks Through Post-Synthetic Ligand Exchange
Published on: June 23, 2023
A New Switchable Zr12 Oxocluster Based Large Pore Metal-Organic Framework Functionalized With Spin Crossover
Emmelyne Cuza1, Chenchen Cao1, Abeer Mohtar2
1Institut Des Matériaux Poreux De Paris, UMR 8004, CNRS, Ecole Normale Supérieure, Ecole Supérieure de Physique et de Chimie Industrielles de Paris, PSL University, Paris, France.
Angewandte Chemie (International Ed. in English)
|July 13, 2026
Summary
A new zirconium-based metal-organic framework (MOF), MIP-216(Zr), enables selective colorimetric sensing of acetic acid vapors. This material demonstrates a rapid, visible response under ambient conditions for real-world monitoring applications.
Area of Science:
- Materials Science
- Chemistry
- Nanotechnology
Background:
- Acetic acid sensing is crucial across various sectors but faces challenges with existing methods.
- Metal-organic frameworks (MOFs) offer potential for compound capture, yet colorimetric detection remains rare.
- A stable material with selective adsorption and colorimetric sensing under ambient conditions is highly sought after.
Purpose of the Study:
- To synthesize and characterize a novel Zr12 oxocluster carboxylate-based MOF, MIP-216(Zr).
- To investigate the MOF's capacity for selective acetic acid capture and colorimetric sensing.
- To develop a practical sensing material for acetic acid detection under environmental conditions.
Main Methods:
- Synthesis and crystal structure determination of MIP-216(Zr).
- Loading of an iron complex ([FeII(L2)2]) into the MOF pores to create a composite material.
- Evaluation of the composite material's response to acetic acid vapor, including color change and spin-state analysis.
Main Results:
- MIP-216(Zr) exhibits a dual pore system facilitating acetic acid capture at ambient conditions.
- The composite material ((1)⊂MIP-216(Zr)) shows a distinct solvatochromic effect upon acetic acid sorption.
- The color change is linked to the spin-state transition of the encapsulated iron complex.
Conclusions:
- The developed MOF-based material offers an unprecedented ability for selective acetic acid capture and colorimetric sensing.
- The material provides a rapid, visible, and selective response to acetic acid vapor at low concentrations.
- This highlights its significant potential for real-world acetic acid monitoring applications.
