Ultramicroporous channel lanthanide coordination polymers of 2,5-pyrazinedicarboxylate

Isostructural 3D polymers {[Ln(pzdc)1.5(H2O)3] · 0.5H2O}∞ (Ln = Pr, Nd, Sm, Eu, Gd; pzdc = 2,5-pyrazinedicarboxylate) possess a 1D ultramicroporous channel which is only accessible by water among common solvents.