| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1235379 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 2012 | 8 Pages |
Nonlinear optical crystals of Bis (l-glutamine) potassium nitrate (BGPN) were grown by slow evaporation technique at ambient temperature. Solubility and metastable zone width of BGPN in aqueous solution were determined. The grown crystal was characterized by single crystal XRD, Powder XRD, FT-IR 1H NMR, EDAX, mass and optical spectroscopic techniques. Single crystal XRD revealed that compound crystallizes in orthorhombic system with non-centrosymmetric space group P212121. The sharp peaks from powder XRD spectrum show the high crystallinity of the grown crystal. FT-IR confirms the presence of functional groups and molecular structure was confirmed by 1H NMR spectrum of the grown crystal. Molecular mass of BGPN sample has been verified by high resolution mass spectroscopic analysis. The presence of potassium in the compound and composition of grown crystals was confirmed on the basis of energy dispersive analysis of X-ray (EDAX). Thermal stability of the grown crystal was studied by TGA–DTA analysis. An optical UV–Vis–NIR spectrum for BGPN sample was recorded in the range of 190–1100 nm. Fluorescence studies shows material BGPN emits blue fluorescence. Second harmonic generation (SHG) studies have been performed by famous Kurtz powder technique with reference to standard potassium dihydrogen phosphate single crystals (KDP). It is found from this technique that SHG efficiency of BGPN is in comparison to that of standard KDP crystals.
Graphical abstract.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Rare combination of l-glutamine and potassium nitrate reporting first time in literature. ► Presence of element potassium in BGPN was confirmed by EDAX analysis. ► BGPN has been subjected to spectroscopic techniques such as NMR, Mass, powder XRD and FT-IR. ► UV–Vis–NIR spectrum shows that BGPN has good transparency window in visible region. ► From NLO study it is confirmed that BGPN is an excellent NLO crystal.
