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Bhattacharyya, ShubhankarORCID iD iconorcid.org/0000-0002-6295-4112
Publications (10 of 13) Show all publications
Filippov, A., Azancheev, N., Gibaydullin, A., Bhattacharyya, S., Antzutkin, O. N. & Shah, F. U. (2018). Dynamic Properties of Imidazolium Orthoborate Ionic Liquids Mixed with Polyethylene Glycol Studied by NMR Diffusometry and Impedance Spectroscopy. Magnetic Resonance in Chemistry, 56(2), 113-119
Open this publication in new window or tab >>Dynamic Properties of Imidazolium Orthoborate Ionic Liquids Mixed with Polyethylene Glycol Studied by NMR Diffusometry and Impedance Spectroscopy
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2018 (English)In: Magnetic Resonance in Chemistry, ISSN 0749-1581, E-ISSN 1097-458X, Vol. 56, no 2, p. 113-119Article in journal (Refereed) Published
Abstract [en]

We used 1H pulsed field gradient (PFG) NMR to study the self-diffusion of polyethylene glycol (PEG) with average molecular mass of 200 and ions in mixtures of PEG with imidazolium bis(mandelato)borate (BMB) and imidazolium bis(oxalato)borate (BOB) ionic liquids (ILs). The ionic liquid was mixed with PEG in the concentration range of 0–100 wt%. Within the temperature range of 295 to 353 K, the diffusion coefficient of BMB is slower than that of the imidazolium cation. The diffusion coefficients of PEG, as well as the imidazolium cation and BMB anions, differ under all experimental conditions tested. This demonstrates that the IL in the mixture is present in at least a partially dissociated state. Generally, increasing the concentration of PEG leads to an increase in the diffusion coefficients of PEG and both the ions, and decreases their activation energy for diffusion. NMR chemical shift alteration analysis showed that the presence of PEG changes the chemical shifts of both ions but in different directions. Impedance spectroscopy was used to measure the ionic conductivity of the ionic liquids mixed with PEG.

Place, publisher, year, edition, pages
John Wiley & Sons, 2018
National Category
Chemical Sciences Physical Chemistry
Research subject
Chemistry of Interfaces
Identifiers
urn:nbn:se:ltu:diva-64929 (URN)10.1002/mrc.4636 (DOI)000419519200009 ()28752526 (PubMedID)2-s2.0-85040248332 (Scopus ID)
Note

Validerad;2018;Nivå 2;2018-01-09 (svasva)

Available from: 2017-07-31 Created: 2017-07-31 Last updated: 2018-02-26Bibliographically approved
Bhattacharyya, S. & Shah, F. U. (2018). Thermal stability of choline based amino acid ionic liquids. Journal of Molecular Liquids, 266, 597-602
Open this publication in new window or tab >>Thermal stability of choline based amino acid ionic liquids
2018 (English)In: Journal of Molecular Liquids, ISSN 0167-7322, E-ISSN 1873-3166, Vol. 266, p. 597-602Article in journal (Refereed) Published
Abstract [en]

Thermal stability of different choline based amino acid ionic liquids were studied. Both short term as well as long term thermal studies were carried out. Long term thermal studies of all ILs were carried out by isothermal TGA and short term thermal studies were measured by temperature ramped TGA. Isothermal TGA were studied at two different temperatures 100 °C and 150 °C for 500 min. Whereas, short term thermal stability represents as T2%, T5% and T10% which are the temperature at which 2%, 5% and 10% mass loss of ILs were observed. The effect of alkyl side chain on the cation, etherification of the cation as well structural variation of anion on the thermal stability of choline based ILs were investigated. It was observed that thermal characteristics of ILs towards temperature ramped TGA were different compared to isothermal TGA.

Place, publisher, year, edition, pages
Elsevier, 2018
National Category
Other Chemistry Topics Physical Chemistry
Research subject
Chemistry of Interfaces
Identifiers
urn:nbn:se:ltu:diva-69864 (URN)10.1016/j.molliq.2018.06.096 (DOI)2-s2.0-85049427213 (Scopus ID)
Note

Validerad;2018;Nivå 2;2018-08-02 (rokbeg)

Available from: 2018-06-25 Created: 2018-06-25 Last updated: 2018-08-02Bibliographically approved
Bhattacharyya, S. & Shah, F. U. (2016). Ether Functionalized Choline Tethered Amino Acid Ionic Liquids for Enhanced CO2 Capture (ed.). A C S Sustainable Chemistry & Engineering, 4(10), 5441-5449
Open this publication in new window or tab >>Ether Functionalized Choline Tethered Amino Acid Ionic Liquids for Enhanced CO2 Capture
2016 (English)In: A C S Sustainable Chemistry & Engineering, ISSN 2168-0485, Vol. 4, no 10, p. 5441-5449Article in journal (Refereed) Published
Abstract [en]

Amino acid ionic liquids (ILs) are the most interesting and effective for CO2 capture due to their low toxicity, biodegradability and fast reactivity towards CO2. Ionic nature of amino acid ILs can raise an environmental issue if the cation counterpart becomes toxic to the aquatic ecosystems and can become potential atmospheric pollutant. In this regard, choline based ILs are known to be promising scaffolds for the development of less toxic amino acid ILs. However, the existing choline amino acid ILs are highly viscous limiting their applicability as solvents. Ether functionalized choline based amino acid ILs with novel series of less toxic green ILs were explored with reduced viscosity and high CO2 capture capacity. A simple, economic, clean and environmentally benign method was utilized for the synthesis of novel choline based amino acid ILs using a commercially available and economical starting material 2-(dimethylamino)ethanol (deanol, a human dietary food supplement). Reported ILs have low viscosity with high CO2 capture capacity (1.62 mol of CO2 /mol of IL, 4.31 mol of CO2/kg of IL, 19.02 wt.% of CO2). Mechanism of [N1,1,6,2O4][Lys]+CO2 reaction and adduct structure was proposed by means of DFT and NMR.

National Category
Physical Chemistry
Research subject
Chemistry of Interfaces
Identifiers
urn:nbn:se:ltu:diva-10925 (URN)10.1021/acssuschemeng.6b00824 (DOI)000384791500035 ()2-s2.0-84990208646 (Scopus ID)9d2c4905-a77e-43c4-b70b-84fdcf6b5bd7 (Local ID)9d2c4905-a77e-43c4-b70b-84fdcf6b5bd7 (Archive number)9d2c4905-a77e-43c4-b70b-84fdcf6b5bd7 (OAI)
Note

Validerad; 2016; Nivå 2; 2016-11-02 (andbra)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
Bhattacharyya, S. & Shah, F. U. (2016). Functionalized Choline Based Amino Acid Ionic Liquids: Scope Of Bio-ILs (ed.). Paper presented at EUCHEM : Conference on Molten Salts and Ionic Liquids 03/07/2016 - 08/07/2016. Paper presented at EUCHEM : Conference on Molten Salts and Ionic Liquids 03/07/2016 - 08/07/2016.
Open this publication in new window or tab >>Functionalized Choline Based Amino Acid Ionic Liquids: Scope Of Bio-ILs
2016 (English)Conference paper, Poster (with or without abstract) (Refereed)
National Category
Physical Chemistry
Research subject
Chemistry of Interfaces
Identifiers
urn:nbn:se:ltu:diva-39658 (URN)e7dc8374-0d1e-44f1-8201-35c358eb9fcf (Local ID)e7dc8374-0d1e-44f1-8201-35c358eb9fcf (Archive number)e7dc8374-0d1e-44f1-8201-35c358eb9fcf (OAI)
Conference
EUCHEM : Conference on Molten Salts and Ionic Liquids 03/07/2016 - 08/07/2016
Note
Godkänd; 2016; 20160717 (faisha)Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2017-11-25Bibliographically approved
Bhattacharyya, S., Filippov, A. & Shah, F. U. (2016). Insights into the Effect of CO2 Absorption on the Ionic Mobility of Ionic Liquids. Physical Chemistry, Chemical Physics - PCCP, 18(41), 28617-28625
Open this publication in new window or tab >>Insights into the Effect of CO2 Absorption on the Ionic Mobility of Ionic Liquids
2016 (English)In: Physical Chemistry, Chemical Physics - PCCP, ISSN 1463-9076, E-ISSN 1463-9084, Vol. 18, no 41, p. 28617-28625Article in journal (Refereed) Published
Abstract [en]

We investigate a comparative effect of CO2 absorption on the ionic mobility of two choline based ionic liquids comprising two different anions such as threonine and imidazole. The synthesized ionic liquids were characterized using 1H and 13C NMR and other spectroscopic techniques. By keeping a common cation and changing the anion from threonine to imidazole both the viscosity and density reduced drastically. We found that [N1,1,6,2OH][Imi] exhibits the highest CO2 capture capacity at 20 °C of 5.27 mol of CO2 per kg of ionic liquid (1.27 mol of CO2 per mol of ionic liquid, 23.26 wt% of CO2) whereas [N1,1,6,2OH][Threo] exhibits 3.6 mol of CO2 per kg of ionic liquid (1.05 mol of CO2 per mol of ionic liquid, 15.87 wt% of CO2). The activation energy for diffusion is calculated using the Vogel-Fulcher-Tamman (VFT) equation in the form of diffusivity. It was found that the activation energy for the diffusion of [N1,1,6,2OH][Threo] is ∼10 times higher than that of [N1,1,6,2OH][Imi]. 1H diffusion NMR data revealed that the diffusivity of [N1,1,6,2OH][Imi] is increased after CO2 absorption whereas a decrease in diffusivity was observed in the case of [N1,1,6,2OH][Threo]. This anomalous behavior of [N1,1,6,2OH][Imi] was further explained by using DFT calculations.

National Category
Physical Chemistry
Research subject
Chemistry of Interfaces
Identifiers
urn:nbn:se:ltu:diva-41888 (URN)10.1039/C6CP05804C (DOI)000386668200025 ()27722357 (PubMedID)2-s2.0-84992190469 (Scopus ID)
Note

Validerad; 2016; Nivå 2; 2016-10-28 (andbra)

Available from: 2016-10-03 Created: 2016-10-03 Last updated: 2018-07-10Bibliographically approved
Shah, F. U., Bhattacharyya, S., Filippov, A. & Akhtar, F. (2016). Ionic Liquids As Liquid And Solid Sorbents For Post-Combustion CO2 Capture (ed.). Paper presented at EUCHEM : Conference on Molten Salts and Ionic Liquids 03/07/2016 - 08/07/2016. Paper presented at EUCHEM : Conference on Molten Salts and Ionic Liquids 03/07/2016 - 08/07/2016.
Open this publication in new window or tab >>Ionic Liquids As Liquid And Solid Sorbents For Post-Combustion CO2 Capture
2016 (English)Conference paper, Poster (with or without abstract) (Refereed)
National Category
Physical Chemistry Other Materials Engineering
Research subject
Chemistry of Interfaces; Engineering Materials
Identifiers
urn:nbn:se:ltu:diva-35873 (URN)a93dc1f8-23c9-46c1-8cc9-0425972ef107 (Local ID)a93dc1f8-23c9-46c1-8cc9-0425972ef107 (Archive number)a93dc1f8-23c9-46c1-8cc9-0425972ef107 (OAI)
Conference
EUCHEM : Conference on Molten Salts and Ionic Liquids 03/07/2016 - 08/07/2016
Note
Godkänd; 2016; 20160717 (faisha)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved
Bhattacharyya, S. & Pathak, U. (2015). A single-reagent-driven multistep one-pot preparation of thiazolines and 1,3-thiazines from aldoximes, nitriles, and carboxylic acids. Synthesis (Stuttgart), 47(22), 3553-3560, Article ID ss-2015-n0248-op.
Open this publication in new window or tab >>A single-reagent-driven multistep one-pot preparation of thiazolines and 1,3-thiazines from aldoximes, nitriles, and carboxylic acids
2015 (English)In: Synthesis (Stuttgart), ISSN 0039-7881, E-ISSN 1437-210X, Vol. 47, no 22, p. 3553-3560, article id ss-2015-n0248-opArticle in journal (Refereed) Published
Abstract [en]

N-(ω-Bromoalkyl)dichlorothiophosphoramidates have been designed as a new class of reagent for the single-reagent-driven multistep preparation of 2-substituted thiazolines and 1,3-thiazines from ald-oximes, nitriles, or carboxylic acids. A wide range of substrates both aromatic as well as aliphatic were investigated and found suitable for the developed protocol

National Category
Physical Chemistry
Research subject
Chemistry of Interfaces
Identifiers
urn:nbn:se:ltu:diva-62900 (URN)10.1055/s-0035-1560459 (DOI)2-s2.0-84947024112 (Scopus ID)
Available from: 2017-04-05 Created: 2017-04-05 Last updated: 2017-11-29Bibliographically approved
Pathak, U., Bhattacharyya, S. & Mathur, S. (2015). Selective thioacylation of amines in water: A convenient preparation of secondary thioamides and thiazolines. RSC Advances, 5(6), 4484-4488
Open this publication in new window or tab >>Selective thioacylation of amines in water: A convenient preparation of secondary thioamides and thiazolines
2015 (English)In: RSC Advances, ISSN 2046-2069, E-ISSN 2046-2069, Vol. 5, no 6, p. 4484-4488Article in journal (Refereed) Published
Abstract [en]

Primary thioamides have been utilised directly in water, without any derivatisation, to selectively thioacylate primary amines. By employing 2-hydroxyethylamines, the reaction can be extended to the preparation of 2-thiazolines via formation of β-hydroxythioamides

National Category
Physical Chemistry
Research subject
Chemistry of Interfaces
Identifiers
urn:nbn:se:ltu:diva-62905 (URN)10.1039/c4ra13097a (DOI)2-s2.0-84919629948 (Scopus ID)
Available from: 2017-04-05 Created: 2017-04-05 Last updated: 2017-11-29Bibliographically approved
Pathak, U., Bhattacharyya, S., Pandey, L. K., Mathur, S. & Jain, R. (2014). An easy access to tertiary amides from aldehydes and N,N- dialkylchlorothiophosphoramidates. RSC Advances, 4(8), 3900-3903
Open this publication in new window or tab >>An easy access to tertiary amides from aldehydes and N,N- dialkylchlorothiophosphoramidates
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2014 (English)In: RSC Advances, ISSN 2046-2069, E-ISSN 2046-2069, Vol. 4, no 8, p. 3900-3903Article in journal (Refereed) Published
Abstract [en]

A mechanistically unprecedented approach for the formation of tertiary amides from N,N-dialkylchlorothiophosphoramidates and aldehydes has been developed. The reaction occurred via the activation of aldehydes with N,N-dialkylchlorothiophosphoramidates followed by amidation with dialkylamine pendent of the same phosphoramidate

National Category
Physical Chemistry
Research subject
Chemistry of Interfaces
Identifiers
urn:nbn:se:ltu:diva-62895 (URN)10.1039/c3ra45781h (DOI)2-s2.0-84890823715 (Scopus ID)
Available from: 2017-04-05 Created: 2017-04-05 Last updated: 2017-11-29Bibliographically approved
Bhattacharyya, S. & Hatua, K. (2014). Computational insight of the mechanism of Algar-Flynn-Oyamada (AFO) reaction. RSC Advances, 4(36), 18702-18709
Open this publication in new window or tab >>Computational insight of the mechanism of Algar-Flynn-Oyamada (AFO) reaction
2014 (English)In: RSC Advances, ISSN 2046-2069, E-ISSN 2046-2069, Vol. 4, no 36, p. 18702-18709Article in journal (Refereed) Published
Abstract [en]

The present DFT investigation supports a previous conclusion of Dean et al. that hydroxylation occurs without epoxide intermediate at room temperature due to a strong electrostatic interaction of peroxide ions with π electrons of CC bonds of chalcone, and 3-hydroxyflavone has been found to be the major product. The calculated activation energy difference (ΔG#) of initial enolization followed by hydroxylation or simultaneous cyclization and hydroxylation has been found to be negligible (∼4 kcal mol-1). On the other hand, epoxide formation requires significant activation energy, which is supposed to occur at high temperatures. In addition, if epoxide is formed, the ring opens by an attack of phenolic oxygen, occurring preferentially at α position via a five-member transition state due to a low activation barrier height (19.82 kcal mol-1 in the gas phase and 19.55 kcal mol-1 in ethanol) compared to that of a six-member transition state (44.41 kcal mol-1 at B3LYP in the gas phase and 38.55 kcal mol -1 in ethanol). It is also observed that the solvation study does not affect the main conclusion of the paper. These findings also support the previous observation of Dean et al. Predicted ΔG# in different DFT functionals are consistent, although the total energy is significantly different

National Category
Physical Chemistry
Research subject
Chemistry of Interfaces
Identifiers
urn:nbn:se:ltu:diva-62728 (URN)10.1039/c3ra46623j (DOI)
Available from: 2017-03-28 Created: 2017-03-28 Last updated: 2017-11-29Bibliographically approved
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Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-6295-4112

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