NMR Studies of Optically Active Schiff Bases

Rozwadowski, Zbigniew

doi:10.1016/b978-0-08-097072-1.00003-0

Cited by 8 publications

(1 citation statement)

References 122 publications

(219 reference statements)

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“…Both positive and negative values were observed for the other carbons. It is known that the value of deuterium isotope effect on the carbon atom linked to the phenolic group reflects the position of proton in the hydrogen bridge [ 22 , 23 ]. On the basis of the DC-2(D) vs. mole fraction of the NH-form relationship, it is possible to estimate the position of the equilibrium ( Figure 3 ) in Schiff bases.…”

Section: Resultsmentioning

confidence: 99%

Spectroscopic Studies of Amino Acid Ionic Liquid-Supported Schiff Bases

et al. 2013

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Amino acid ionic liquid-supported Schiff bases, derivatives of salicylaldehyde and various amino acids (l-threonine, l-valine, l-leucine, l-isoleucine and l-histidine) have been investigated by means of various spectroscopic techniques (NMR, UV-Vis, IR, MS) and deuterium isotope effects on 13C-NMR chemical shifts. The results have shown that in all studied amino acid ionic liquid-supported Schiff bases (except the l-histidine derivative) a proton transfer equilibrium exists and the presence of the COO− group stabilizes the proton transferred NH-form.

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Section: Resultsmentioning

confidence: 99%

Spectroscopic Studies of Amino Acid Ionic Liquid-Supported Schiff Bases

et al. 2013

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ChemInform Abstract: NMR Studies of Optically Active Schiff Bases

Rozwadowski

2013

ChemInform

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Thermal‐Induced Transformation of Polydopamine Structures: An Efficient Route for the Stabilization of the Polydopamine Surfaces

Proks

Brus

Pop‐Georgievski

et al. 2013

Macro Chemistry & Physics

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This work brings a new insight into the structural transformation and stabilization of polydopamine (PDA) surfaces induced by thermal treatment. Taking advantage of the isotopic enrichment, 15N CP/MAS NMR experiments produce significant signal enhancements for PDA, allowing detection of a range of nitrogen structural units—the reaction products of the conversion of NH3+ units of 15N‐dopamine·HCl. In addition, 1H‐15N cross‐polarization polarization‐inversion profiles measured for each of the detected 15N NMR signals and 1H‐15N FSLG HETCOR NMR spectra allow revisions and extensions to be made in a structural elucidation of PDA. Combining the NMR data thermogravimetric analyses and an FTIR analysis, several competitive processes that occur during the thermal conversion of dopamine are identified.

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NMR Studies of Optically Active Schiff Bases

Cited by 8 publications

References 122 publications

Spectroscopic Studies of Amino Acid Ionic Liquid-Supported Schiff Bases

Spectroscopic Studies of Amino Acid Ionic Liquid-Supported Schiff Bases

ChemInform Abstract: NMR Studies of Optically Active Schiff Bases

Thermal‐Induced Transformation of Polydopamine Structures: An Efficient Route for the Stabilization of the Polydopamine Surfaces

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