Application of polymethacrylate resin as stationary phase in liquid chromatography with UV detection for C1–C7 aliphatic monocarboxylic acids and C1–C7 aliphatic monoamines

Ohta, Kazutoku; Towata, Atsuya; Ohashi, Masayoshi; Takeuchi, Toyohide

doi:10.1016/j.chroma.2003.12.046

Cited by 5 publications

(1 citation statement)

References 13 publications

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“…[1][2][3][4][5] 1-Pa was also employed in the search of probing mechanisms of catalysis and electron transfer by methylamine dehydrogenase by site-directed mutagenesis of αPhe 55 , spectroscopic study on the photoinduced reaction of fullerene C 60 , determination of ibandronate and its degradation products and application of polymethacrylate resin as stationary phase in liquid chromatography. [6][7][8][9] The B3LYP density functional model shows reasonably good performance on vibrational frequencies and geometries of organic compounds. [10][11][12][13][14][15] A detailed quantum chemical investigation will aid in making assignments to the fundamental normal modes of 1-pa and clarifying the obtained experimental results for this molecule.…”

Section: Introductionmentioning

confidence: 99%

Vibrational Spectroscopic Investigation and Conformational Analysis of 1-Pentylamine: A Comparative Density Functional Study

Alver

Parlak

2010

J. Theor. Comput. Chem.

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The possible stable conformers of 1-pentylamine (1-pa) molecule were experimentally and theoretically studied by FT-IR and Raman spectroscopy in the region of 4000-400 cm −1 . The optimized geometric structures concerning the minimum on the potential energy surface were investigated by Becke-3-Lee-Yang-Parr (B3LYP) density functional method together with 6-31G(d) basis set. Based on the energy calculations, 10 possible rotamers of 1-pa (TT, TG, GT, GT 1 , GG 1 , GG 2 , GG 3 , GG 4 , GG 5 and GG 6 ; T and G denote trans and gauge, respectively) were proposed. Optimized energies of the possible conformers were obtained in the gas phase and within the chloroform, carbon tetrachloride, methanol and water solvent environments all of which have different polarities. Comparison between the experimental and theoretical results based on the correlation graphics and mean absolute error calculations presented in this study indicates that density functional B3LYP method is able to provide satisfactory results for predicting vibrational wavenumbers and TT isomer is the most stable form of 1-pa molecule.

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Section: Introductionmentioning

confidence: 99%

Vibrational Spectroscopic Investigation and Conformational Analysis of 1-Pentylamine: A Comparative Density Functional Study

Alver

Parlak

2010

J. Theor. Comput. Chem.

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Ion‐Exclusion Chromatography

2009

Ion Chromatography

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Ion-exclusion chromatography (IEC) has developed into a very useful technique for separating relatively small weak acids (carbonic acid, carboxylic acids, hydrocarboxylic acids, etc.), weak bases (ammonia, amines) and hydrophilic molecular species such as carbohydrates and the lower alcohols. The analytical method actually involves the separation of molecular species rather than ions. Of course, ions can often be readily converted into molecular species as when anions of weak acids are acidified. The rationale for including IEC in a book on ion chromatography seems to be that a cation-exchange resin, or occasionally an anion-exchange resin, has generally been used for IEC separations. Also, it has become customary to include IEC in symposia and books devoted to ion chromatography.Ion-exclusion chromatography is a comparatively old technique, attributed primarily to Wheaton and Bauman [1]. Ionic material is rejected by cation-or anionexchange resin and passes through quickly, but non-ionic substances are held up and come through more slowly. Substances that can be separated include weak organic and inorganic acids, weak organic and inorganic bases, and hydrophilic neutral compounds such as sugars.The resin bed consists of three parts: 1. A solid resin network 2. Occluded liquid within the resin beads 3. The mobile liquid between the resin beads.The ion-exchange resin acts as a semipermeable membrane between the two aqueous phases, (2) and (3). Ionized sample solutes are excluded from the interior water (2) and pass quickly through the column. Nonionic materials are not excluded and they partition between the two water phases, (2) and (3). Thus, they pass more slowly through the column. Nonionic solutes differ in their degree of retardation by the resin phase because of: (i) differing polar attraction between the solute and resin functional groups, (ii) differing van der Waals forces between the solutes and the hydrocarbon portion of the resin.Ion Chromatography, 4th Ed. James S. Fritz and Douglas T. Gjerde

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Vibrational spectroscopic investigation and conformational analysis of 1-heptylamine: A comparative density functional study

Tursun

Keşan

Parlak

et al. 2013

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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Application of polymethacrylate resin as stationary phase in liquid chromatography with UV detection for C1–C7 aliphatic monocarboxylic acids and C1–C7 aliphatic monoamines

Cited by 5 publications

References 13 publications

Vibrational Spectroscopic Investigation and Conformational Analysis of 1-Pentylamine: A Comparative Density Functional Study

Vibrational Spectroscopic Investigation and Conformational Analysis of 1-Pentylamine: A Comparative Density Functional Study

Ion‐Exclusion Chromatography

Vibrational spectroscopic investigation and conformational analysis of 1-heptylamine: A comparative density functional study

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