IR and Raman spectra of two layered aluminium phosphates Co(en)3Al3P4O16 · 3H2O and [NH4]3[Co(NH3)6]3[Al2(PO4)4]2 · 2H2O |
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| Authors: | Annamma John Daizy Philip Keith R Morgan S Devanarayanan |
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| Institution: | a St John's College, Anchal, Kollam 691 306, India;b Mar Ivanios College, Thiruvananthapuram 695 015, India;c Industrial Research Limited, PO Box 31-310 Lower Hutt, New Zealand;d Department of Physics, University of Kerala, Kariavattom, Thiruvananthapuram 695 581, India |
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| Abstract: | The FT IR and FT Raman spectra of Co(en)3Al3P4O16 · 3H2O (compound I) and NH4]3Co(NH3)6]3Al2(PO4)4]2 · 2H2O (compound II) are recorded and analysed based on the vibrations of Co(en)33+, Co(NH3)63+, NH4+, Al---O---P, PO3, PO2 and H2O. The observed splitting of bands indicate that the site symmetry and correlation field effects are appreciable in both the compounds. In compound I, the overtone of CH2 deformation Fermi resonates with its symmetric stretching vibration. The NH4 ion in compound II is not free to rotate in the crystalline lattice. Hydrogen bonding of different groups is also discussed. |
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| Keywords: | Vibrational spectra Aluminium phosphates Co(en)33+ ion Co(NH3)63+ ion |
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