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Sangeetha T, Sahana R, Mounica P, Elangovan A, Shanmugam R, Arivazhagan G. H – Bond interactions in water multimers and water multimers – Pyridine complexes: Natural bond orbital and reduced density gradient isosurface analyses. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
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Naganandhini S, Sangeetha T, Sahana R, Mounica P, Rajmohan G, Dineshkumar P, Arivazhagan G. Theoretical discussion on the Hydrogen Bond Interactions between Acrylic Acid dimer and dibutyl ether Monomer. COMPUT THEOR CHEM 2022. [DOI: 10.1016/j.comptc.2022.113746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Sangeetha T, Naganandhini SP, Shanmugam R, Arivazhagan G. FTIR Spectral Signatures of Formamide + Propionic/Acetic Acid Solutions. J SOLUTION CHEM 2022. [DOI: 10.1007/s10953-022-01139-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Dineshkumar P, Sahana R, Shanmugam R, Elangovan A, Sankaranarayanan R, Kumbharkhane A, Joshi Y, Arivazhagan G. Heteromolecular H –bond interaction forces and dielectric parameters: Time domain reflectometry studies. Chem Phys Lett 2022. [DOI: 10.1016/j.cplett.2021.139272] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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The Structures of ZnCl 2-Ethanol Mixtures, a Spectroscopic and Quantum Chemical Calculation Study. Molecules 2021; 26:molecules26092498. [PMID: 33922922 PMCID: PMC8123294 DOI: 10.3390/molecules26092498] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 04/20/2021] [Accepted: 04/23/2021] [Indexed: 11/16/2022] Open
Abstract
We report in this article the structural properties, spectral behavior and heterogeneity of ZnCl2-ethanol (EtOH) mixtures in a wide-composition range (1:3 to 1:14 in molar ratios), using ATR-FTIR spectroscopy and quantum chemical calculations. To improve the resolution of the initial IR spectra, excess spectroscopy and two-dimensional correlation spectroscopy were employed. The transformation process was suggested to be from EtOH trimer and EtOH tetramer to EtOH monomer, EtOH dimer and ZnCl2-3EtOH complex upon mixing. The theoretical findings showed that increasing the content of EtOH was accompanied with the flow of negative charge to ZnCl2. This led to reinforcement of the Zn←O coordination bonds, increase of the ionic character of Zn‒Cl bond and weakening and even dissociation of the Zn‒Cl bond. It was found that in some of the ZnCl2-EtOH complexes optimized at the gas phase or under the solvent effect, there existed hydroxyls with a very special interactive array in the form of Cl‒Zn+←O‒H…Cl-, which incredibly red-shifted to wavenumbers <3000 cm-1. This in-depth study shows the physical insights of the respective electrolyte alcoholic solutions, particularly the solvation process of the salt, help to rationalize the reported experimental results, and may shed light on understanding the properties of the deep eutectic solvents formed from ZnCl2 and an alcohol.
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Kannan P, Karthick N, Sangeetha T, Shanmugam R, Elangovan A, Arivazhagan G. FTIR studies and DFT calculations on the associative nature of methyl cellosolve in binary solutions with acetonitrile. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Kalhor P, Yu ZW. Structural and hydrogen-bonding properties of neat t-BuNH2 and its binary mixtures with CCl4, CHCl3 and DMSO. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.128257] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Sangeetha T, Kannan P, Karthick N, Mahendraprabu A, Arivazhagan G. Classical/non-classical hydrogen bonds in m-xylene - ethanol solution: FTIR and theoretical approach. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113406] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Mahendraprabu A, Karthick N, Kannan P, Sangeetha T, Kumbharkhane A, Arivazhagan G. Molecular interactions in the binary solutions of methyl cellosolve with chlorobenzene: Spectroscopic and dielectric studies. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2019.127565] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Kannan PP, Karthick NK, Arivazhagan G. Hydrogen bond interactions in the binary solutions of formamide with methanol: FTIR spectroscopic and theoretical studies. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 229:117892. [PMID: 31862652 DOI: 10.1016/j.saa.2019.117892] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 12/01/2019] [Accepted: 12/01/2019] [Indexed: 05/28/2023]
Abstract
FTIR spectroscopic studies on the binary solutions of formamide with methanol reveal the presence of "free" O - H in methanol. These "free" O - H groups are found in methanol tetramers which is confirmed from the DFT calculations. DFT calculations on the formamide dimers of five different geometries encompassing one or more of the N - H⋯O, C - H⋯O and N - H⋯N hydrogen bonds tell that N - H⋯N bonds are the strongest. Dissociation of the. N - H⋯N bonds of formamide in the binary solutions with methanol has a major impact on the NH2 symmetric stretching mode of formamide in the FTIR spectra. In these solutions the formation of 1:4 (formamide:methanol), 1:5 and 2:4 complexes are possible. These complexes are more stable than the formamide dimers, methanol tetramer and pentamer investigated in the present work. Methanol methyl group plays no role in either the self-association or heterointeraction with formamide.
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Affiliation(s)
- P P Kannan
- Postgraduate Department of Physics, Mannar Thirumalai Naicker College, Madurai 625004, Tamilnadu, India
| | - N K Karthick
- Department of Physics, The Madura College, Madurai 625011, Tamilnadu, India
| | - G Arivazhagan
- Department of Physics, Thiagarajar College, Madurai 625009, Tamilnadu, India.
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Deshmukh S, Pattebahadur K, Mohod A, Patil S, Khirade P. Structural and dynamics study of polar liquid mixtures by dielectric and FTIR spectroscopic characterizations. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.111819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Kannan PP, Arivazhagan G, Sangeetha T, Karthick NK, Kumbharkhane AC. FTIR studies, DFT calculations and time domain reflectometry studies on tetrahydrofuran - methanol binary solutions. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 222:117162. [PMID: 31176160 DOI: 10.1016/j.saa.2019.117162] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Revised: 05/21/2019] [Accepted: 05/26/2019] [Indexed: 06/09/2023]
Abstract
FTIR signature of neat tetrahydrofuran (THF), methanol (MeOH) and their binary solutions at various molefractions (0.8:0.2 (THF:MeOH), 0.6:0.4, 0.4:0.6 and 0.2:0.8) have been recorded. Density Functional Theory (DFT) calculations have also been carried out on THF, MeOH multimers and possible THF-MeOH complex molecules. The results of FTIR studies and DFT calculations confirm the formation of 1:3 (THF:MeOH) and 1:4 complex structures with (MeOH)O - H⋯O(THF), (MeOH methyl)C - H⋯O(THF) and (THF methylene)C - H⋯O(MeOH) H-bond interactions. (MeOH)O - H⋯O(MeOH) homointeractions among the MeOH trimers and tetramers are stronger than the THF-MeOH heterointeractions in complexes. But, the stability of 1:4 complexes is more than that of the trimers and tetramers as inferred from the interaction energy values obtained by DFT calculations. Time Domain Reflectometry (TDR) study has also been carried out on the THF-MeOH binary solutions in the frequency range 10 MHz-30 GHz at 298 K. The results of dielectric studies have been correlated with that of FTIR studies and DFT calculations.
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Affiliation(s)
- P P Kannan
- Department of Physics, Thiagarajar College, Madurai 625009, Tamilnadu, India
| | - G Arivazhagan
- Department of Physics, Thiagarajar College, Madurai 625009, Tamilnadu, India.
| | - T Sangeetha
- Department of Physics, Thiagarajar College, Madurai 625009, Tamilnadu, India
| | - N K Karthick
- Department of Physics, Madura College, Madurai 625011, Tamilnadu, India
| | - A C Kumbharkhane
- School of Physical Sciences, S.R.T.M. University, Nanded 431606, MS, India
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Homo/hetero interactions in the binary solutions of toluene with acetonitrile: FTIR spectroscopic, theoretical and dielectric studies. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.05.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Kannan P, Karthick N, Mahendraprabu A, Kumbharkhane A, Joshi Y, Arivazhagan G. FTIR spectroscopy, quantum chemical calculations and time domain reflectometry studies on the behavior of methanol molecules in the environment of dibutyl ether. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.01.062] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Karthick N, Arivazhagan G, Shanmugam R. FTIR spectroscopic studies and DFT calculations on the toluene- propionitrile binary system. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.06.046] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Strategies for using hydrogen-bond donor/acceptor solvent pairs in developing green chemical processes with supercritical fluids. J Supercrit Fluids 2018. [DOI: 10.1016/j.supflu.2017.11.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Karthick N, Arivazhagan G. Molecular interactions in the complexes of toluene with butyronitrile: A DFT approach. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2017.12.092] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Hydrogen bond interactions in the binary solutions of ethyl acetate with nitrobenzene: Spectroscopic, theoretical and dielectric studies. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2017.12.064] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Kannan P, Karthick N, Mahendraprabu A, Shanmugam R, Elangovan A, Arivazhagan G. Red/blue shifting hydrogen bonds in acetonitrile-dimethyl sulphoxide solutions: FTIR and theoretical studies. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.03.036] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Spectroscopic and time domain reflectometry studies on acetonitrile - Ethylene glycol binary solutions. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.02.017] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Karthick N, Kannan P, Mahendraprabu A, Arivazhagan G, Suganya N. Spectroscopic studies on the binary solutions of ethanol with 1,4-dioxane. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.02.064] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Molecular interaction forces in acetone + ethanol binary liquid solutions: FTIR and theoretical studies. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2016.10.055] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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