Structural characterization of complexes between iminodiacetate blocked onstyrene-divinylbenzene matrix (Chelex 100 resin) and Fe(III), Cr(III), andZn(II) in solid phase by energy-dispersive X-ray diffraction

Local structure of Fe(III), Cr(LU), and Zn(II) cations has been determined on the amorphous sample by means of the difference method used for liquid s ystems. We recorded energy-dispersive X-ray diffraction spectra of a chelat ing resin (Chelex 100), containing paired iminodiacetate ions coupled to a styrene-divinylbenzene support, in several ionic forms. Coordination geomet ry of Fe(III), Cr(III), and Zn(LI) metal cations with Chelex 100 resin liga nd sites, and conformation of the ligand groups have been determined.