Precision neutron diffraction structure determination of protein and nucleic acid components. III. The crystal and molecular structure of the amino acid α-glycine

Jönsson, Per-Gunnar; Kvick, Å.

doi:10.1107/s0567740872005096

Cited by 392 publications

(212 citation statements)

References 4 publications

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“…The main parameters obtained from our DFT calculation of the zwitterionic a-glycine crystal are shown in Table 1, together with the experimental values measured by neutron diffraction, 41 used as initial geometry in the optimization processes. A representation of the unit cell is shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

An infrared study of solid glycine in environments of astrophysical relevance

Maté

Rodrı́guez-Lazcano

Gálvez

et al. 2011

Phys. Chem. Chem. Phys.

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The conversion from neutral to zwitterionic glycine is studied using infrared spectroscopy from the point of view of the interactions of this molecule with polar (water) and non-polar (CO 2 , CH 4 ) surroundings. Such environments could be found on astronomical or astrophysical matter. The samples are prepared by vapour-deposition on a cold substrate (25 K), and then heated up to sublimation temperatures of the co-deposited species. At 25 K, the neutral species is favoured over the zwitterionic form in non-polar environments, whereas for pure glycine, or in glycine/water mixtures, the dominant species is the latter. The conversion is easily followed by the weakening of two infrared bands in the mid-IR region, associated to the neutral structure. Theoretical calculations are performed on crystalline glycine and on molecular glycine, both isolated and surrounded by water. Spectra predicted from these calculations are in reasonable agreement with the experimental spectra, and provide a basis to the assignments. Different spectral features are suggested as probes for the presence of glycine in astrophysical media, depending on its form (neutral or zwitterionic), their temperature and composition.

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Section: Resultsmentioning

confidence: 99%

An infrared study of solid glycine in environments of astrophysical relevance

Maté

Rodrı́guez-Lazcano

Gálvez

et al. 2011

Phys. Chem. Chem. Phys.

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“…Glycine is used as a biocompatible compound for the synthesis of many molecules [9] and for treating schizophrenia, benign prostatic hyperplasia (BPH), and some rare inherited metabolic disorders. It is also employed in memory enhancement and cancer prevention, and protects kidneys from the harmful side effects of certain drugs used after organ transplantation as well as the liver from the harmful effects of alcohol [10,11].…”

Section: Introductionmentioning

confidence: 99%

Thermal gravity analysis for the study of stability of graphene oxide–glycine nanocomposites

Najafi

Rajabi

2015

Int Nano Lett

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In this work, we synthesized graphene oxideglycine (GO-G) nanocomposite. To produce this nanocomposite with GO surface, glycine with known concentration was added to GO suspension in ethanol solvent. Nanocomposites provided were characterized by scanning electron microscope (SEM) and Fourier transform infrared (FT-IR) spectroscopy, respectively. Thermogravimetric analysis (TGA) was employed to investigate the thermal stability of these nanocomposites. Results of characterization by SEM and FT-IR showed that nanocomposite was created by the reaction between GO and G. Study of thermal stability by TGA showed that thermal stability of GO was more than that of the GO-G nanocomposite.

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“…. O II distances are 2.758, 3.002 and 2.833, 3.022Å, respectively [4]). In the β-form individual parallel polar layers are linked via hydrogen bonds in a threedimensional network [1,7,9,10] (see Schemes 1a and 1b).…”

Section: Ir-ld Spectral Analysis Of β−Glycinementioning

confidence: 99%

“…Assignment and confirmation of the experimental IR bands is carried out by IR-LD spectral analysis below and compared with the crystallographic structure for α-glycine [1][2][3][4][5][6][7][8][9][10]. [4]).…”

Section: Ir-ld Spectral Analysis Of α-Glycinementioning

confidence: 99%