An efficient and room temperature synthesis of Fe3+ doped chlorocadmiumphosphate molecular sieves: Spectroscopic, thermal and powder XRD investigations

This paper mainly reports on the structural investigations of Fe3+ doped chlorocadmiumphosphate CdHPO4Cl·[H3N(CH2)6NH3]0.5 nanocrystals prepared at room temperature by organic amine templated method. Synthesized crystals are characterized by various spectroscopic techniques. From the powder X-ray diffraction patterns, the crystal system is indexed to monoclinic unit cell with lattice parameters a = 13.533, b = 15.008, c = 10.363 Å and β = 118.3°. The average size of the crystallite evaluated is 110 nm. FT-IR spectrum contains absorption bands related to organic amine and phosphate ions. The thermal analysis indicates that the inorganic framework collapses above 300 °C, after the removal of the organic amine template. From optical absorption and EPR studies the crystal field, Racah parameters and g values suggested that the doped Fe3+ ions entered the network at distorted octahedral site.