Unprecedented 4(2)6(4) topological 2-D rare-earth coordination polymers from a flexible tripodal acid with additional amide groups.

Novel lanthanide(III) coordination polymers based on a flexible tripodal ligand with additional amide groups were obtained with interestingly unprecedented four-connected 4(2)6(4) topology from the pyramidal nodes and reversible crystal-to-amorphous transformation properties.