Metal–organic frameworks enable the delivery of hydrogen sulfide (H2S), an endogenous gasotransmitter with potential therapeutic value for treating disorders such as ischemia-reperfusion injury.
Metal–organic frameworks bearing coordinatively unsaturated Mg(II) sites are promising materials for gas storage, chemical separations, and drug delivery due to their low molecular weights and lack of toxicity. However, there...
Chlorine (Cl2) is a toxic
and corrosive gas
that is
both an essential reagent in industry and a potent chemical warfare
agent. Materials that can strongly bind Cl2 at low pressures
are essential for industrial and civilian personal protective equipment
(PPE). Herein, we report the first examples of irreversible Cl2 capture via the dichlorination of alkene linkages in Zr-based
metal–organic frameworks. Frameworks constructed from fumarate
(Zr-fum) and stilbene (Zr-stilbene) linkers retain long-range order
and accessible porosity after alkene dichlorination. In addition,
energy-dispersive X-ray spectroscopy reveals an even distribution
of Cl throughout both materials after Cl2 capture. Cl2 uptake experiments reveal high irreversible uptake of Cl2 (>10 wt %) at low partial pressures (<100 mbar), particularly
in Zr-fum. In contrast, traditional porous carbons mostly display
reversible Cl2 capture, representing a continued risk to
users after exposure. Overall, our results support that alkene dichlorination
represents a new pathway for reactive Cl2 capture, opening
new opportunities for binding this gas irreversibly in PPE.
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