The Infrared Spectra of Secondary Amines and Their Salts

Heacock, R. A.; Marion, Léo

doi:10.1139/v56-231

Cited by 177 publications

(76 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Figure 7 contains the stretching vibration of primary amine -NH 2 at ≈3397 and ≈3221 cm −1 . The vibration at ≈3145 cm −1 corresponds probably to NH secondary amine [15,23]. In the 1800-1500 cm −1 spectral range a medium intensity, see Fig.…”

Section: Ftir Spectroscopymentioning

confidence: 85%

Spectroscopic and physical–chemical characterization of ambazone–glutamate salt

et al. 2011

View full text Add to dashboard Cite

Abstract. Ambazone monohydrate C 8 H 11 N 7 S · H 2 O (AMB), a well-known antimicrobial compound, was used together with Glutamic Acid C 5 H 9 NO 4 (Glu) to obtain a new solid form using the solvent-drop grinding procedure. The screening of the new solid form was best achieved by the combined use of X-ray Powder Diffraction (XRPD) and several spectroscopic techniques (Fourier Transformed Infrared Spectroscopy (FTIR), X-ray Photoelectron Spectroscopy (XPS), Raman and 13 C-NMR spectroscopy) together with Differential Scanning Calorimetry (DSC), Differential thermal analysis and thermogravimetry (DTA-TGA). The combination of the mentioned analytical techniques allows the compound to be assigned to an ambazone-glutamate salt which crystallizes in monoclinic system having the following lattice parameters: a = 9.8352, b = 4.7014, c = 40.0987 Å and β = 94.505• . DSC, TGA data and the before mentioned spectroscopic techniques support the ambazone-glutamate salt formation.

show abstract

Section: Ftir Spectroscopymentioning

confidence: 85%

Spectroscopic and physical–chemical characterization of ambazone–glutamate salt

et al. 2011

View full text Add to dashboard Cite

show abstract

“…4), being shifted to ∼1601 cm −1 by salt formation [13]. Cleaves and Plyler [7] correlated the spectral bands at 1625-1516 cm −1 with NH deformation vibration.…”

Section: Ftir Spectroscopymentioning

confidence: 90%

“…3); the FTIR spectrum contains also [13,14] NH stretching band in the 3320-3180 cm −1 spectral range, i.e., 3226 cm −1 [13,24]. The new band which appears at ∼3513 cm −1 in the spectrum of AMB · NIA can be explained by the hydrogen bond breaking between H 2 O molecule and N-H group of AMB after the salt formation.…”

Section: Ftir Spectroscopymentioning

confidence: 94%

“…The new band which appears at ∼3513 cm −1 in the spectrum of AMB · NIA can be explained by the hydrogen bond breaking between H 2 O molecule and N-H group of AMB after the salt formation. Also it has been shown a change in the NH stretching absorption of amines [13]; it was observed that the sharp strong band at ∼3226 cm −1 due to the NH stretching is shifted to 3254 cm −1 and reduced in intensity. The band at 3147 cm −1 corresponds to the NH vibration [13] for pure AMB, this band shifted at 3158 cm −1 in the salt spectrum.…”

Section: Ftir Spectroscopymentioning

confidence: 99%

“…Also it has been shown a change in the NH stretching absorption of amines [13]; it was observed that the sharp strong band at ∼3226 cm −1 due to the NH stretching is shifted to 3254 cm −1 and reduced in intensity. The band at 3147 cm −1 corresponds to the NH vibration [13] for pure AMB, this band shifted at 3158 cm −1 in the salt spectrum. A new shoulder appeared at ∼2937 cm −1 probably due to the protonated secondary amine.…”

Section: Ftir Spectroscopymentioning

confidence: 99%

See 2 more Smart Citations

Structural characterization of ambazone salt with niflumic acid

Kacsó

Rus²,

Pop

et al. 2012

Spectroscopy

View full text Add to dashboard Cite

Abstract. Salt formation is a good method of increasing solubility, dissolution rate and consequently the bioavailability of poor soluble acidic or basic drugs [Polymorphism in Pharmaceutical Solids, Drugs and the Pharmaceutical Sciences, Vol. 192, 2nd edn, Informa Healthcare, New York, 2009]. The aim of this study was to obtain and to investigate the structural properties of the compound obtained by solvent drop grinding (SDG) method [Chem. Commun. (Camb.) 20 (2002), 2372-2373 at room temperature starting from the 1:1 molar ratios of ambazone (AMB) and niflumic acid (NIA). The thermal behavior of the obtained compound (AMB · NIA) was investigated by differential scanning calorimetry (DSC) and thermogravimetry (TG), the thermal diffusivity and effusivity parameters were determined by photothermal radiometry (PTR). The structural characterization was performed with X-ray powder diffraction (XRPD) and infrared spectroscopy (FTIR). XRPD data and FTIR spectra demonstrated a new structure for AMB · NIA compound as compared to those of the starting materials.

show abstract

Post‐Synthetic Covalent Grafting of Amines to NH₂‐MOF for Post‐Combustion Carbon Capture

Justin,

Espín,

Pougin

et al. 2023

Adv Funct Materials

View full text Add to dashboard Cite

Herein, a post‐synthetic modification strategy is used to covalently graft polyamines, including ethylenediamine (ED), diethylenetriamine (DETA), tris(2‐aminoethyl)amine (TAEA), and polyethyleneimine (PEI) to the amino‐ligand inside of a Cr‐MOF, NH2‐Cr‐BDC, for post‐combustion carbon capture applications. X‐ray absorption spectroscopy (XAS), X‐ray photoelectron spectroscopy (XPS), and ion chromatography (IC) reveal that ≈45% of the MOF ligands are grafted with polyamines. Next, assessment of CO2 uptake, CO2/N2 selectivity, isosteric heats of CO2 adsorption, separation performance during humid CO2/N2 (15/85) breakthrough experiments, and cyclability, reveals an enhanced performance for the polyamine‐containing composites and the following performance trend: NH2‐Cr‐BDC<ED<DETA<TAEA<PEI. The best‐performing materials, including the TAEA and PEI‐grafted MOFs, offer CO2 uptakes of 1.0 and 1.55 mmol g−1, respectively, at 0.15 bar and 313 K. Further, these composites also offer a high CO2 capacity after 200 temperature swing adsorption/desorption (TSA) cycles in simulated humid flue gas. Last, after soaking the composites in water, there is no loss of CO2 capacity; on the contrary, when the same MOF is impregnated with polyamines using traditional approaches, there is ≈85% CO2 capacity loss after soaking. Thus, this covalent grafting strategy successfully immobilizes amines in MOF pores preventing leaching and hence can be an effective strategy to extend the adsorbent lifetime.

show abstract

The Infrared Spectra of Secondary Amines and Their Salts

Abstract: The infrared spectra of a number of secor~dary bases and of their salts have been examined. 'l'he spectra of the salts differ from those of the corresponding bases in containing several absorption bands that are absent fro111 the latter.

Cited by 177 publications

References 19 publications

Spectroscopic and physical–chemical characterization of ambazone–glutamate salt

Spectroscopic and physical–chemical characterization of ambazone–glutamate salt

Structural characterization of ambazone salt with niflumic acid

Post‐Synthetic Covalent Grafting of Amines to NH₂‐MOF for Post‐Combustion Carbon Capture

Contact Info

Product

Resources

About

The Infrared Spectra of Secondary Amines and Their Salts

Abstract: The infrared spectra of a number of secor~dary bases and of their salts have been examined. 'l'he spectra of the salts differ from those of the corresponding bases in containing several absorption bands that are absent fro111 the latter.

Cited by 177 publications

References 19 publications

Spectroscopic and physical–chemical characterization of ambazone–glutamate salt

Spectroscopic and physical–chemical characterization of ambazone–glutamate salt

Structural characterization of ambazone salt with niflumic acid

Post‐Synthetic Covalent Grafting of Amines to NH2‐MOF for Post‐Combustion Carbon Capture

Contact Info

Product

Resources

About

Post‐Synthetic Covalent Grafting of Amines to NH₂‐MOF for Post‐Combustion Carbon Capture