Growth and characterization studies of ferroelectric diglycine nitrate (DGN) single crystals

Difficulties in the growth and characterization of non-linear optical materials: A case study of salts of amino acids

“…The most remarkable point is, however, that contrary to the statement of the authors that ''the results are in good agreement with the values reported by Baran et al [61]'' these spectra are absolutely different! The spectra registered by Baran et al in [61] really correspond to DGN, while the IR and Raman spectra registered by Kanagadurai et al [59] completely coincide with those of a-glycine. Also, the thermal data correspond well to data of glycine.…”

“…One is the paper published by Kanagadurai et al [59] on the growth and characterization of the well-known ferroelectric diglycine nitrate (DGN) ( [60,61] and references therein). The growth conditions reported are very close to that given in [62].…”

“…the unit cell parameters, agree well with those in [60] and confirm that the crystals are DGN. Among other data, Kanagadurai et al [59] showed and discussed the FT-IR and FT-Raman spectra 6 and assigned the absorption band and Raman scattering lines (called incorrectly Raman absorption bands) to functional groups of glycine and nitrate-ions. The most remarkable point is, however, that contrary to the statement of the authors that ''the results are in good agreement with the values reported by Baran et al [61]'' these spectra are absolutely different!…”

Effects of Hydrothermal Temperature on the Microstructures of BiVO4 and Its Photocatalytic O2 Evolution Activity under Visible Light

“…The obvious absorptions at 1623 cm −1 and 3440 cm −1 can be ascribed to bending and stretching vibrations of the adsorbed H 2 O molecules, respectively . The medium peak at 1390 cm −1 and the weak peak at 1440 cm −1 indicate adsorbed trace NO 3 − . , The very weak absorption bands at 2924, 2875, and 1052 cm −1 can be ascribed to aliphatic C−H and C−N stretching vibrations, respectively. It suggests that CTAB can be efficiently removed by the ion-exchange and washing processes due to the relative weak bonding between CTAB and BiVO 4 …”

Controllable Synthesis and Photocatalytic Activity of Spherical, Flowerlike and Threadlike Bismuth Vanadates

“…36,37 The medium peak at 1419 cm -1 indicates adsorbed trace NO -3 . 38,39 The two strong absorption bands at 821 cm -1 and 746 cm -1 belong to the stretching vibration and deformation bending vibration of VO [3][4] , respectively. 39 Minor down shift of wavenumber at 746 cm -1 is observed, indicating that the variation of structure for VO 3-4 may be occurred with the increasing of pH values in this system.…”