Infrared studies of hydrogen bonding in alcohol-base systems
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Precipitation of methionine and ethyl cellulose in carbon dioxide + ethanol + acetic acid systems at high pressures: Phase equilibrium data for the GAS antisolvent process
2023, Fluid Phase EquilibriaCitation Excerpt :Thus, ethanol searches to increase the density of the solution, contributing with ethanol-ethyl cellulose hydrogen bonds and polar interactions, promoting the formation of a single phase. However, to reach adequate solubility, a large amount of ethanol is needed, indicating that CO2 acts as an anti-solvent for this polymer [28,36,38,39]. In the present work, ethyl cellulose showed an increase in its solubility, which can be explained by the extra interactions provided by the acid group of acetic acid.
Infrared quantification of ethanol and 1-butanol hydrogen bonded hydroxyl distributions in cyclohexane
2023, Spectrochimica Acta - Part A: Molecular and Biomolecular SpectroscopyTuning the electronic band structure of graphitic carbon nitride by breaking intramolecular bonds: A simple and effective approach for enhanced photocatalytic hydrogen production
2020, Applied Surface ScienceCitation Excerpt :The three peaks located at 3080, 3151 and 3250 cm−1 corresponded to the vibrational modes of N–H groups. The existence of these functional groups originated from the amino groups on the samples, where the broad intensity originated from hydrogen bonding at different extents [38]. NH groups acted as link bridges between heptazine units while NH2 groups were present on the periphery of the polymeric chain.
Impact of donor acidity and acceptor anharmonicity on v<inf>c=o</inf> spectral shifts in O-H···O=C H-bonded ketone-alcohol complexes: An IR spectroscopic investigation
2020, Spectrochimica Acta - Part A: Molecular and Biomolecular SpectroscopyCitation Excerpt :There has been numerous works on investigation of H-bond using IR spectroscopy over past several decades [1,8,11,23–28]. One of the popular choices for such works has been O-H···O=C type H-bonds [27–32], where the HBD is a hydroxyl group and HBA a carbonyl group. In one of the very first works providing important insights into the relation between H-bond strength and spectral shift, Badger and Bauer showed a linear dependence of shift in νX−H on interaction energy [33].
Investigation of N–H⋯O interactions in N-monosubstituted caproamide – Ether systems: FT–IR and FT–NIR spectroscopic study
2019, Journal of Molecular StructureCitation Excerpt :For the series of caproamides examined in this study, a correlation between the intermolecular transition moments and relative frequency shift, which would indicate a contribution from the charge transfer mechanism, was not observed. Fig. 4 represent the graphs of calculated formation constants according to Becker's method [17]. In addition in Table 2 were given values of formation constants which rise in order, for MIR region ACA < DMAFCA < TCA < FCA < BCA ∼ CCA in presence DEE and TCA < DMAFCA < ACA < CCA < BCA < FCA with THF.