Raman scattering in 2‐Amino‐5‐Nitropyridine‐L‐(+)‐Tartrate single crystals

Abstract

Single crystals of 2-amino-5-nitropyridineL-(+)-tartratc (ANPT) have been studicd by Raman scattering and infrarcd abso tion at room temperature and at 10K. The crystal of monoclinic symmetry space group P21 (C,) undergoes no detectable structural phase transition between these two temperatures. The room temperature spectra were compared with those of parent compounds in order to propose a tentative assignment of the observed vibrational modes. Particular attention was paid to the hydrogen bond rnodcs.

Brilliant green dye added zinc(tris) thiourea sulphate monocrystal growth with enhanced crystalline perfection, optical, photoluminescence and mechanical properties

“…All peak positions and intensity are found to be shifted and enhanced due to dye incorporation in ZTS crystalline matrix and may also result in enhancing the photoluminescence (PL) properties. The above explained vibrational modes in all BGZTS crystal are found to be shifted due to dye incorporation in ZTS matrix and is in well agreement with earlier report [44,45].…”

Optical and microhardness studies of semiorganic nonlinear optical material: L‐ histidine tetrafluoroborate

“…In the FT-IR spectra peaks around 1635 and 1411cm -1 indicate the presence of the COO -(carboxylate ion) in L-HFB [8,9]. A sharp peak at 3150 cm -1 is assigned to N-H symmetric stretching and a peak at 3109 cm -1 is assigned to C-H symmetric stretching in the compound [10]. The stretching frequency at 529 cm -1 and 984 cm -1 are assigned to the BF 4 - [9 -11].…”

Crystal growth, thermal and optical studies on phase matchable new organic NLO material for blue-green laser generation

“…Further the signal at d ¼ 3:4 ppm is due to the heavily shielded proton in the C-H group. The signal at d ¼ 3:8 ppm is due to the proton of the CH 2 group and the proton of the N-H group in the imidazole ring accounts for a hump around d ¼ 7:5 ppm [12,13]. From this spectral analysis the molecular structure of the synthesized compound has been confirmed.…”

“…The asymmetric stretching vibration at 1588 cm À1 in L-histidine is shifted to 1519 cm À1 due to protonation of the amino group in L-HFP. The modes of C-N stretching at 1317 cm À1 and C-F stretching at 1199 cm À1 are also clearly observed in the spectrum [10][11][12]. Other prominent characteristic vibrational frequencies are assigned as well and compared with L-histidine and L-HFB (Table 1).…”