Growth and characterization of pure and l-ornithine monohydrochloride doped ADP crystals

K.V. Vadhel¹ , V.J. Pandya² , M.J. Joshi³ , H.O. Jethva⁴

Section:Research Paper, Product Type: Journal-Paper
Vol.10 , Issue.3 , pp.19-25, Jun-2022

Online published on Jun 30, 2022

Copyright © K.V. Vadhel, V.J. Pandya, M.J. Joshi, H.O. Jethva . This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
 

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Abstract :
In the present study, growth and various characterizations of pure and different wt% l-ornithine monohydrochloride (LOMHCl) doped ammonium dihydrogen phosphate (ADP) crystals are reported. The slow solvent evaporation method at room temperature is used to grow these crystals. After nearly 25 days, good quality, transparent and rectangular crystals are obtained. The grown crystals are analyzed by CHN, EDAX, FTIR, thermal and PL characterizations. EDAX and CHN analysis confirms the presence of dopant atoms. The EDAX analysis shows gradual increase in the weight% of carbon (C) and chlorine (Cl) in LOMHCl doped ADP crystals. The presence of all constitutive functional groups of ADP in pure and LOMHCl doped ADP crystals is confirmed by FT-IR spectra. The doping of LOMHCl in ADP gives rise to small shift in some of the characteristic vibrational frequencies. The thermo-gram of pure and different wt% LOMHCl doped ADP suggests slight increase in thermal stability of doped ADP crystals as well as shows reduction in the weight loss % of pure ADP at the end of first and second decomposition stages. It is observed from the thermal analysis that the presence of dopant LOMHCl prevents pure ADP to decompose into gaseous products. The PL study shows L-defect and D-defect. The doping of LOMHCl shows reduction in PL emission spectra and increase in Stokes shift value.

Key-Words / Index Term :
ADP, EDAX, FTIR, thermal analysis, PL

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