XRD, thermal, FTIR and SEM studies on gel grown γ‐glycine crystals

Abstract

Glycine is the smallest among amino acids. The polymorphs, α-and γ-forms of glycine were crystallized in silica gel by reduction of solubility method. The grown crystals were characterized by single crystal X-ray diffraction studies and density determination. Fourier transform infrared spectroscopic studies and thermogravimetric analysis of γ-glycine were also conducted. Morphological and scanning electron microscopic (SEM) studies were also made and compared with the crystal packing.

Synthesis of L‐valine crystals

“…But in other amino acids without additional OH molecules, carbon monoxide may be released instead of CO 2 . The chemical reaction expected to occur during decomposition of L-valine will be as in the case of γ-glycine explained elsewhere [22].…”

Characterization of gel grown iron‐manganese‐cobalt ternary levo‐tartrate crystals

“…The absorption at 3457.2 cm −1 is attributed to the stretching of O−H group, indicating the presence of water of crystallization or water of hydration [20]. The absorption at 1575.7 cm −1 is assigned to C=O stretching of carbonyl group [21]. Sheveheko [22] suggested that the IR spectra of both normal and partrially deutereted compounds of some tartrates exhibit absorption from 600 cm −1 to 400 cm −1 due to COO − group in metals and suggested the formula as shown in figure 4.…”

Bentonite-Based Nano Organic Clay Using Chalcone and Azo Dye as Organophilic Reagents

“…In the spectra of CH-BNT and AZ-BNT, the absorption bands at 3626 and 3640 cm‾ 1 indicate the presence of free O-H stretching and at 1091 and 1109 cm‾ 1 correspound to C-N stretching [19,20]. In addition to the bands of the original Na-BNT, the band at 1490 and 1438 cm‾ 1 suggests the existence of the ammonium ion.…”