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Browsing by Author "Rakhmatullin I."

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Application of high resolution NMR (1H and 13C) and FTIR spectroscopy for characterization of light and heavy crude oils

Rakhmatullin I.; Efimov S.; Tyurin V.; Al-Muntaser A.; Klimovitskii A.; Varfolomeev M.; Klochkov V. (2018)

© 2018 Elsevier B.V. High-resolution nuclear magnetic resonance (NMR) and Fourier transform infrared (FTIR) spectroscopy experiments were applied to obtain detailed information on the hydrocarbon chemistry of three light ...
Complicated Conformational Exchange of New Pyridoxine Derivative. Dynamic13C NMR Characterization

Rakhmatullin I.; Galiullina L.; Karataeva F.; Klochkov V. (2017)

© 2017, Springer Science+Business Media, LLC. New pyridoxine derivative with multiple chemical exchanges was studied by 13 C (at 298 K, 188 K) and 2D NMR ( 1 H- 13 C HSQC, 1 H- 13 C HMBC) spectroscopy in acetone-d 6 solution. ...
Dynamic NMR study of cyclic derivatives of pyridoxine

Rakhmatullin I.; Galiullina L.; Garipov M.; Strel'Nik A.; Shtyrlin Y.; Klochkov V. (2015)

Copyright © 2014 John Wiley & Sons, Ltd. A series of pyridoxine derivatives was investigated by 1H and 2D nuclear overhauser enhancement spectroscopy (NOESY) NMR. The free energies of activation for the pyridyl-oxygen ...
Dynamic NMR study of cyclic derivatives of pyridoxine

Rakhmatullin I.; Galiullina L.; Garipov M.; Strel'nik A.; Shtyrlin Y.; Klochkov V. (2014)

A series of pyridoxine derivatives was investigated by 1H and 2D nuclear overhauser enhancement spectroscopy (NOESY) NMR. The free energies of activation for the pyridyl-oxygen rotation of the 2,4-dinitrophenyl ether of ...
Dynamic NMR study of dinitrophenyl derivatives of seven-membered cyclic ketals of pyridoxine

Rakhmatullin I.; Galiullina L.; Garipov M.; Strel'nik A.; Shtyrlin Y.; Klochkov V. (2015)

© 2015 John Wiley & Sons, Ltd. Two pyridoxine derivatives containing a dinitrophenyl moiety were investigated by 1H NMR spectroscopy. Conformational dynamics in solution were studied for each compound using ...
Effect of micelles and reverse micelles on nonlinear optical properties of potassium dichromate and Staphylococcus aureus treatment

Zarif F.A.; Sharifi S.; Shurshalova G.S.; Rakhmatullin I.; Klochkov V.; Aganov A.; Behrouz M.; Sharifmoghadam M.R.; Mahdizadeh S.; Nezhad M.K. (2020)

© 2020 Elsevier B.V. Potassium dichromate (KD) is a common inorganic pigment used as a photosensitizer (PS) for photodynamic therapy (PDT). Numerous works in this area have so far reflected on organic dye and its colloidal ...
Hydrothermal upgrading of heavy oil in the presence of water at sub-critical, near-critical and supercritical conditions

Al-Muntaser A.; Varfolomeev M.; Suwaid M.; Yuan C.; Chemodanov A.; Feoktistov D.; Rakhmatullin I.; Abbas M.; Domínguez-Álvarez E.; Akhmadiyarov A.; Klochkov V.; Amerkhanov M. (2020)

© 2019 Elsevier B.V. In this study, the hydrothermal upgrading (HTU) of high sulfur-content heavy oil was investigated at sub-critical (Sub-CW), near-critical (NCW) and supercritical water (SCW) conditions. Products obtained ...
Influence of Co-based catalyst on subfractional composition of heavy oil asphaltenes during aquathermolysis

Mukhamatdinov I.; Salih I.; Rakhmatullin I.; Sitnov S.; Laikov A.; Klochkov V.; Vakhin A. (2019)

© 2019 Elsevier B.V. The chemical changes in the composition of asphaltene subfractions of heavy oil under the influence of oil-soluble Co-based catalyst were investigated. The results of SARA-analysis and MALDI-spectroscopy ...
Qualitative and quantitative analysis of heavy crude oil samples and their SARA fractions with 13c nuclear magnetic resonance

Rakhmatullin I.; Efimov S.; Tyurin V.; Gafurov M.; Al-Muntaser A.; Varfolomeev M.; Klochkov V. (2020)

© 2020 by the authors. Nuclear magnetic resonance (NMR) approaches have unique advantages in the analysis of crude oil because they are non-destructive and provide information on chemical functional groups. Nevertheless, ...
Qualitative and quantitative analysis of oil samples extracted from some Bashkortostan and Tatarstan oilfields based on NMR spectroscopy data

Rakhmatullin I.; Efimov S.; Margulis B.; Klochkov V. (2017)

© 2017 Elsevier B.V.Measurements of crude oil samples by nuclear magnetic resonance spectroscopy were carried out. The quantitative fractions of aromatic molecules and functional groups constituting oil hydrocarbons in ...
Spatial Structure and Conformational Mobility of Seven-Membered Cyclic Acetals and Ketals Containing Pyridoxine Moiety in Solution by NMR Methods

Rakhmatullin I.; Galiullina L.; Balandina A.; Karataeva F.; Shtyrlin Y.; Klochkov V. (2018)

© 2018, Springer Science+Business Media, LLC, part of Springer Nature. In the last decade, pyridoxine derivatives were widely used for the synthesis of molecules with important biological and physical properties. However, ...
Stereodynamics of some pyridoxine derivatives

Rakhmatullin I.; Galiullina L.; Balandina A.; Garipov M.; Strelnik A.; Galiullina A.; Shtyrlin Y.; Klochkov V. (2017)

Copyright © 2016 John Wiley & Sons, Ltd.The conformational properties of three pyridoxine derivatives were studied by 1H dynamic NMR spectroscopy. Conformational exchange caused by a rotation of 2-nytrophenyl group around ...
Stereodynamics of some pyridoxine derivatives

Rakhmatullin I.; Galiullina L.; Balandina A.; Garipov M.; Strelnik A.; Galiullina A.; Shtyrlin Y.; Klochkov V. (2016)

© 2016 John Wiley & Sons, Ltd.The conformational properties of three pyridoxine derivatives were studied by 1H dynamic NMR spectroscopy. Conformational exchange caused by a rotation of 2-nytrophenyl group around one single ...
Structural studies of pravastatin and simvastatin and their complexes with SDS micelles by NMR spectroscopy

Rakhmatullin I.; Galiullina L.; Klochkova E.; Latfullin I.; Aganov A.; Klochkov V. (2016)

© 2015 Elsevier B.V. Conformational features of pravastatin and simvastatin molecules in solution and in their complexes with sodium dodecyl sulfate micelles (SDS) were studied by 2D NOESY NMR spectroscopy. On the basis ...
Structure of pravastatin and its complex with sodium dodecyl sulfate micelles studied by NMR spectroscopy

Galiullina L.; Rakhmatullin I.; Klochkova E.; Aganov A.; Klochkov V. (2014)

© 2014 John Wiley & Sons, Ltd. The aim of this work was to study the mechanisms of interaction between pravastatin and cell membranes using model membranes (sodium dodecyl sulfate micelles) by nuclear magnetic resonance ...
1H NMR Characterization of Two New Pyridoxine Derivatives

Rakhmatullin I.; Galiullina L.; Garipov M.; Strel’nik A.; Shtyrlin Y.; Klochkov V. (2016)

© 2016, Springer Science+Business Media New York.Two new pyridoxine derivatives were studied by dynamic 1H NMR spectroscopy. The complete 1H NMR data for two pyridoxine derivatives are presented. Assignment of the signals ...

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Browsing by Author "Rakhmatullin I."

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