The reaction of ammonium ferric sulfate with sodium borohydride in laponite sol yields nanoiron colloidalsolution. This solution in air forms transparent yellow brown solution. The resulting solution reacts with bidentate chelatingligands. The reaction products are characterized by UV-Vis absorption spectroscopy and X-ray diffraction. All compoundsshow metal to ligand charge transfer band in the region of 400~650 nm in UV-Vis absorption spectra. This indicates theformation of iron-ligand complex by air oxidation of nanoiron. Also, XRD patterns exhibit that the iron-ligand complex isintercalated in the interlayer of laponite.