Flexible Metal–Organic Frameworks
In article number 2301122, Eun Seon Cho and co‐workers design highly flexible metal–organic framework (MOF)‐based proton conductors to control the breathing behavior and hydrogen‐bonding networks with structural transformation through the simultaneous introduction of proton carriers and functional groups. Imidazole‐loaded MIL‐88B without functional groups exhibits the super proton conductivity with the exceptional breathing behavior, attributed to the continuous hydrogen‐bonding networks with the elaborately controlled host‐guest interaction.