Porous Lanthanide–Organic Open Frameworks with Helical Tubes Constructed from Interweaving Triple‐Helical and Double‐Helical Chains

Abstract

Achiral channels as well as left- and right-handed helical tubes are present in novel lanthanide-organic frameworks prepared under hydrothermal conditions from lanthanide oxides. In the three-dimensional coordination polymers, the Ln atoms (Ln=Eu, Dy, Y, Pr, Nd, Sm, Gd, Tb, Er) are linked by 4,5-imidazoledicarboxylic acid ligands with skew coordination orientation (see picture).