Porosity regulation of metal–organic frameworks for high proton conductivity by rational ligand design: mono- versus disulfonyl-4,4′-biphenyldicarboxylic acid

Three 3D MOFs, (Me 2 NH 2 ) 2 (H 3 O)[LnL 2 ]·8H 2 O (Ln = Eu, Gd, Tb), based on 2-sulfonyl-4,4′-biphenyldicarboxylic acid (H 3 L) have been prepared which show a high proton conductivity under low relative humidity.