The highly stable open frameworks and the adsorption performance of a 3D Er–Cu coordination polymer containing spacious channels

A novel 3D Er–Cu heteronuclear coordination polymer, {[Er2Cu3L6]·7H2O}n (H2L=iminodiacetic acid), containing large amount of spacious channels was synthesized. Its crystal structure was determined by X-ray diffraction. The highly stable skeleton and the adsorption performance of this polymer were demonstrated by thermogravimetric analysis (TGA) and X-ray diffraction (XRD) analysis.