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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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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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Darwish AS, Abu Hatab F, Lemaoui T, A. Z. Ibrahim O, Almustafa G, Zhuman B, E. E. Warrag S, Hadj-Kali MK, Benguerba Y, Alnashef IM. Multicomponent Extraction of Aromatics and Heteroaromatics from Diesel Using Acidic Eutectic Solvents: Experimental and COSMO-RS Predictions. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116575] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Szefler B, Diudea MV. Quantum-mechanical calculations on molecular substructures involved in nanosystems. Molecules 2014; 19:15468-506. [PMID: 25264833 PMCID: PMC6270685 DOI: 10.3390/molecules191015468] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Revised: 08/21/2014] [Accepted: 09/10/2014] [Indexed: 11/16/2022] Open
Abstract
In this review article, four ideas are discussed: (a) aromaticity of fullerenes patched with flowers of 6-and 8-membered rings, optimized at the HF and DFT levels of theory, in terms of HOMA and NICS criteria; (b) polybenzene networks, from construction to energetic and vibrational spectra computations; (c) quantum-mechanical calculations on the repeat units of various P-type crystal networks and (d) construction and stability evaluation, at DFTB level of theory, of some exotic allotropes of diamond D5, involved in hyper-graphenes. The overall conclusion was that several of the yet hypothetical molecular nanostructures herein described are serious candidates to the status of real molecules.
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Affiliation(s)
- Beata Szefler
- Department of Physical Chemistry, Collegium Medicum, Nicolaus Copernicus University, Kurpińskiego 5, Bydgoszcz 85-096, Poland
| | - Mircea V Diudea
- Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, Arany Janos street 11, Cluj-Napoca RO-400028, Romania.
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Gao C, Yan T, Du J, He F, Luo H, Wan Y. Introduction of broad spectrum antibacterial properties to bacterial cellulose nanofibers via immobilising ε-polylysine nanocoatings. Food Hydrocoll 2014. [DOI: 10.1016/j.foodhyd.2013.09.015] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Tang Q, Guo Z, Li Q. Comparison of substitution effects of F and methyl groups adjoined to C and B atoms in hydrogen bonds. COMPUT THEOR CHEM 2014. [DOI: 10.1016/j.comptc.2013.12.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Dragelj JL, Janjić GV, Veljković DŽ, Zarić SD. Crystallographic and ab initio study of pyridine CH–O interactions: linearity of the interactions and influence of pyridine classical hydrogen bonds. CrystEngComm 2013. [DOI: 10.1039/c3ce40759d] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Immobilization of gelatin on bacterial cellulose nanofibers surface via crosslinking technique. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2012. [DOI: 10.1016/j.msec.2011.12.006] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Kowalska A, Stobiecka A, Wysocki S. A computational investigation of the interactions between harmane and the functional monomers commonly used in molecular imprinting. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.theochem.2009.01.008] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Carboxylated butadiene–styrene rubber/halloysite nanotube nanocomposites: Interfacial interaction and performance. POLYMER 2008. [DOI: 10.1016/j.polymer.2008.08.042] [Citation(s) in RCA: 194] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Gündoğdu K, Bandaria J, Nydegger M, Rock W, Cheatum CM. Relaxation and anharmonic couplings of the O-H stretching vibration of asymmetric strongly hydrogen-bonded complexes. J Chem Phys 2007; 127:044501. [PMID: 17672701 DOI: 10.1063/1.2753840] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
We present infrared transient grating measurements of complexes of formic acid with pyridine and pyrazine at four excitation frequencies within the broad proton-stretching band. These experiments investigate the mechanism of the line broadening of the O-H stretching vibration. The transients show coherent oscillations that decay within a few hundred femtoseconds and population relaxation on two time scales. We fit the data using a simple model of three coupled oscillators that relax via sequential kinetics through an intermediate state. Based on this model, we conclude that the coherent oscillations result from superpositions of Fermi-resonance-coupled states involving formic acid overtone and combination states.
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Affiliation(s)
- Kenan Gündoğdu
- Chemistry Department, The University of Iowa, Iowa City, Iowa 52242, USA
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Du M, Guo B, Liu M, Jia D. Formation of Reinforcing Inorganic Network in Polymer via Hydrogen Bonding Self-Assembly Process. Polym J 2007. [DOI: 10.1295/polymj.pj2006104] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Balevicius V, Bariseviciute R, Aidas K, Svoboda I, Ehrenberg H, Fuess H. Proton transfer in hydrogen-bonded pyridine/acid systems: the role of higher aggregation. Phys Chem Chem Phys 2007; 9:3181-9. [PMID: 17612741 DOI: 10.1039/b701775h] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work the role of higher molecular aggregation in the proton transfer processes within hydrogen bond (H-bond) is investigated. The H-bonded complex consisting of 4-cyanopyridine (CyPy) with trichloroacetic acid (TCA) has been studied in the solutions of acetonitrile, carbon tetrachloride, chloroform and dichloroethane as solvent by FTIR spectroscopy and quantum chemical DFT calculations. In order to illustrate the effect of increasing H-bond strength FTIR investigations have also been performed on solutions of CyPy with H(2)O, acetic-, trifluoroacetic- and methanesulfonic acids. Proton states in the H-bond have been monitored using vibrational CyPy ring modes in FTIR spectra. The stabilization of the CyPy/TCA complex in its protonated form upon increasing polarity of the solvent has been evidenced. It was shown that formation of the CyPy/(TCA)(2) aggregates in the solutions favors the proton transfer process. An X-ray diffraction study has been performed on a single 1 : 2 co-crystal of pyridine/3,5-dinitrobenzoic acid. The H-bond motif found in this system exhibits the same connectivity by strong hydrogen bonds N-H(+)[dot dot dot]O(-) and O-H[dot dot dot]O as that in the CyPy/(TCA)(2) complex predicted by DFT calculation. Certain discrepancies are observed in C-H[dot dot dot]O connectivity only. The networks of H-bonds in both assemblies differ from those usually pictured for 1 : 2 base/carboxylic acid complexes in the literature.
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Berg ER, Freeman SA, Green DD, Ulness DJ. Effects of Hydrogen Bonding on the Ring Stretching Modes of Pyridine. J Phys Chem A 2006; 110:13434-46. [PMID: 17165869 DOI: 10.1021/jp0655367] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The effects of hydrogen bonding on the ring stretching modes (both ring breathing and triangle) of pyridine are experimentally investigated using noisy light based coherent Raman scattering spectroscopy. Three systems, pyridine/formamide, pyridine/water, and pyridine/acetic acid, provide varying degrees of strength for the diluent-pyridine hydrogen bond complex. Formamide forms a relatively weaker hydrogen bond, while acetic acid essentially fully transfers a proton to pyridine. Both dilution studies and temperature studies are performed on the three systems. Together, these provide a broad context in which a very simple model for the electronic behavior of pyridine is formulated. This model is based on a molecular orbital picture and electrostatic arguments, and it well explains the observed experimental results. Additionally, a new mechanism for the line broadening of the ring breathing mode for the pyridine-water hydrogen bonded complex is proposed.
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Affiliation(s)
- Erik R Berg
- Department of Chemistry, Concordia College, Moorhead, Minnesota 56562, USA
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Rodziewicz P, Rutkowski KS, Melikova SM, Koll A, Buda F. Car–Parrinello Molecular Dynamics Study of the Blue-Shifted F3CH⋅⋅⋅FCD3 System in Liquid N2. Chemphyschem 2006; 7:1221-8. [PMID: 16700091 DOI: 10.1002/cphc.200600061] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Fluoroform, as confirmed by both experimental and theoretical studies, can participate in improper H-bond formation, which is characterized by a noticeable increase in the fundamental stretching frequency nu(C-H) (so-called blue frequency shift), an irregular change of its integral intensity, and a C-H bond contraction. A Car-Parrinello molecular dynamics simulation was performed for a complex formed by fluoroform (F3CH) and deuterated methyl fluoride (FCD3) in liquid nitrogen. Vibrational analysis based on the Fourier transform of the dipole moment autocorrelation function reproduces the blue shift of the fundamental stretching frequency nu(C-H) and the decrease in the integral intensity. The dynamic contraction of the C-H bond is also predicted. The stoichiometry of the solvated, blue-shifted complexes and their residence times are examined.
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Affiliation(s)
- Pawel Rodziewicz
- Faculty of Chemistry, University of Wroclaw, 14 F. Joliot-Curie, 50-383 Wroclaw, Poland.
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Pavel D, Lagowski J. Computationally designed monomers and polymers for molecular imprinting of theophylline and its derivatives. Part I. POLYMER 2005. [DOI: 10.1016/j.polymer.2005.04.099] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Pavel D, Lagowski J. Computationally designed monomers and polymers for molecular imprinting of theophylline—part II. POLYMER 2005. [DOI: 10.1016/j.polymer.2005.05.146] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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