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Chapter III CHN Analysis, FT IR …..
Conclusion
1. Data of CHN analysis indicated the presence of carbon and nitrogen
in doped sample and it was found to be increased as doping
concentration increased and remained absent in the pure KDP
sample. The paper chromatographs of doped samples gave the
characteristic purple spot for the presence of amino acids.
2. The presence of absorption peaks corresponding to various functional
groups like C=O stretching, N-H symmetric and asymmetric stretching
in the FT–IR spectra confirmed the presence of amino acids in KDP
crystals. The change in the absorption frequency of O-H vibrations in
doped samples with respect to pure KDP towards lower wave-number
indicated the interaction of dopants to hydrogen bond of KDP crystals.
The force constant values of O-H vibration decreased on doping of
various amino acids in KDP crystals further suggested the interaction
of dopants to hydrogen bond of KDP crystals. The frequency of
absorption of O=P-OH and O-P-OH symmetric decreased in doped
samples with comparison to pure KDP and opposite thing happened
for O=P-OH bending, which indicated the interaction of dopant
through hydrogen bond of KDP.
3. Powder XRD patterns of both pure and various amino acids doped
KDP crystals confirmed the single phase nature. Very marginal
change in the unit cell parameters was observed, which also indicated
that the doping did not alter the crystal structure of KDP.
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