Vibrational spectra of crystalline β-alanine

Berezhinsky, L. I.; Довбешко, Г. И.; Lisitsa, M. P.; Литвинов, Г. С.

doi:10.1016/s1386-1425(97)00233-3

Cited by 29 publications

(22 citation statements)

References 13 publications

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“…Here, Note: asym./sym., asymmetric/symmetric; str., stretching; def., deformation; wag./twist./rock., wagging/twisting/rocking. the assignments are those by Garrigou-Lagrange (1978) and Berezhinskii et al (1998). For the KI4-[~-Ala intercalate, no bands were observed for the COOH group, but symmetric COO--stretching bands occurred at 1418-1373 cm 1.…”

Section: Intercalation Of Amino Acidsmentioning

confidence: 84%

Preparation of Kaolinite-Amino Acid Intercalates Derived from Hydrated Kaolinite

Sato

1999

Clays and clay miner.

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Abstract---Intercalation of amino acids into 10.0-A hydrated kaolinite was studied by powder X-ray diffraction (XRD), differential thermal analysis-thermal gravimetry (DTA-TG), and infrared (IR) spectroscopy. Intercalation was found to be dependent on the chain-length, pH, and the concentration of the amino acid zwitterion. Near the isoelectric point, fully intercalated phases were obtained in solutions of concentration >0.5-1 M for glycine (Gly), 2-3 M for 13-alanine ({3-Ala), and 12 M for both ",/-aminobutyric acid ('y-Aba) and g-aminovaleric acid (g-Ava). e-aminocaproic acid (e-Aca) with a long chain (C = 6) was only partially intercalated. Intercalated amino acid formed a mono-molecular arrangement with the alkyl chain tilting toward the layer at an angle related to H20 content. The compositions of the intercalates of the Gly and [3-Ala are AlzSi2Os(OH)4-(Gly)0.67.0.24H20 and AIzSi2Os(OH)4.([~-Ala)0.63.0.25H20, respectively, based on TG data. From IR data, Gly and [3-Ala molecules are found intercalated as zwitterions and these molecules form hydrogen bonds with both the A1-OH and Si-O surfaces of kaolinite. Washing the intercalate with water produced a hydrated kaolinite, which may form a second amino-acid intercalate of high order. Thus, hydrated kaolinite intercalates or deintercalates amino acids depending on concentration and conditions.

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Section: Intercalation Of Amino Acidsmentioning

confidence: 84%

Preparation of Kaolinite-Amino Acid Intercalates Derived from Hydrated Kaolinite

Sato

1999

Clays and clay miner.

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“…We focus here on the attribution of the most characteristic bands. In the high frequency region of the spectra, the signals between 3000 and 2400 cm −1 can be assigned to the (NeH) and (CeH) stretching vibrations of the secondary or tertiary ammonium groups [27][28][29]. Compound 3 also exhibits two additional bands at 3437 and 3488 cm −1 which can be attributed to the (OeH) stretching vibration of the lattice water molecules.…”

Section: Ir Spectramentioning

confidence: 99%

One pot-synthesis of the fourth category of dinuclear molybdenum(VI) oxalate series: Structure and study of thermal and redox properties

Sarr

Mbaye

Diop

et al. 2019

Inorganica Chimica Acta

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Three new dinuclear molybdenum(VI) oxalate (Pr 2 NH 2) 4 •[M�0 6 (¼0 4 hl (1), (�r 2 NH;J 4 •[M�0 6 (¼0 4 h] (2) and (HDabco) 4 [Mo 2 0 6 (C 2 0 4 hJ-2H 2 0 (3) compounds, have been prepared by one pot-synthesis at room temperature and characterized by single crystal X-ray diffraction and vibrational spectroscopies. F.ach compound contains the binuclear [Mo 2 0 6 (¼0 4 h] 4-anion where each molybdenum is in an octahedral Mo0 6 environment. ln compound (3), the interconnection between [M0206(C204)2J 4-anions, [HDabco] + cations and water molecules (H20) leads to an infinite inorganic-organic chain structure. Similarly, in compounds (1) and (2) the interactions between [Mo206(C2Ü 4hJ4-anions and respectively [Pr 2NH2l + and [ i Pr�2l + cations leads to an infinite inorganic-organic chain structure. A remarkable difference between the compounds is that in compounds (1) and (2) interactions between the chains involve only Van der Waals forces giving rise to layer-like structures, which also interact between them only by Van der Waals forces, whereas in compound (3) the chains interact also through hydrogen bonds giving a 30 supramolecular structure. The thermal properties of the compounds were investigated through thermogravimetric and differential thermal analyzes. The differences in the thermal decomposition of the compounds in the solid state are discussed in relation with their crystal structure. Cyclic voltammetry shows that the [Mo 2 0 6 (¼0 4 h] 4-anion can be reduced in both aprotic solvent and water.

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“…Owing to the -[NH 3 ] C rocking vibration, a medium-intensity band is expected at 1130 cm 1 in both the IR and Raman spectra. 5,8,9 In the title compound, the -[NH 3 ] C rocking mode is observed as a broad Raman band at 1125 cm 1 . The corresponding IR band is not observed distinctly as it falls within the broad strong band of perchlorate group vibration.…”

Section: Vibrations Of -[Nh 3 ] C Groupmentioning

confidence: 99%

Vibrational spectral studies of β‐alaninium perchlorate

Pandiarajan

Rajaram

Ramakrishnan

2005

J Raman Spectroscopy

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Fourier transform (FT) IR and FT-Raman spectra were recorded at room temperature for crystals of balaninium perchlorate. The observed wavenumbers in both spectra reveal that the amino acid has carbonyl and protonated amino groups that reflect the cationic form of the amino acid. The presence of a carboxyl cyclic dimer structure was revealed. The symmetry of the perchlorate ion is reduced from T d to C 2v . Consequently, the degeneracies of a few modes are lifted and these were reflected in the spectra.

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Vibrational spectra of crystalline β-alanine

Cited by 29 publications

References 13 publications

Preparation of Kaolinite-Amino Acid Intercalates Derived from Hydrated Kaolinite

Preparation of Kaolinite-Amino Acid Intercalates Derived from Hydrated Kaolinite

One pot-synthesis of the fourth category of dinuclear molybdenum(VI) oxalate series: Structure and study of thermal and redox properties

Vibrational spectral studies of β‐alaninium perchlorate

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