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Two-color resonance enhanced multi-photon ionization and mass analyzed threshold ionization spectroscopy of 2-aminobenzonitrile and the CN substitution effect. Chem Phys Lett 2018. [DOI: 10.1016/j.cplett.2017.12.073] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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2
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Kumru M, Bardakçı T, Güner S. DFT calculations and experimental FT-IR, dispersive-Raman and EPR spectral studies of Copper (II) chloride complex with 3-amino-1-methylbenzene. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 123:187-193. [PMID: 24394534 DOI: 10.1016/j.saa.2013.12.068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Revised: 12/09/2013] [Accepted: 12/11/2013] [Indexed: 06/03/2023]
Abstract
In this study, we present the synthesis and the characterization of Copper (II) chloride complex with 3-amino-1-methylbenzene (3A1MB). This complex was characterized by vibrational and EPR spectroscopic techniques and elemental analysis. The molecular structure and spectrometry of this complex: Cu(3A1MB)2Cl2 and its ligand: 3A1MB have been investigated theoretically by performing DFT/B3LYP calculations. Cu(3A1MB)2Cl2 has been optimized as two conformers and the more stable conformer is determined. The optimized geometries and calculated vibrational frequencies have been evaluated via comparison with experimental values, and the normal modes were assigned on the basis of the percent potential energy distribution (PED). A good agreement between calculated and experimental data is observed.
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Affiliation(s)
- Mustafa Kumru
- Department of Physics, Faculty of Arts and Sciences, Fatih University, Istanbul, Turkey
| | - Tayyibe Bardakçı
- Department of Physics, Faculty of Arts and Sciences, Fatih University, Istanbul, Turkey.
| | - Sadik Güner
- Department of Physics, Faculty of Arts and Sciences, Fatih University, Istanbul, Turkey
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Sivaranjini T, Periandy S, Govindarajan M, Karabacak M, Asiri A. Spectroscopic (FT-IR, FT-Raman and NMR) and computational studies on 3-methoxyaniline. J Mol Struct 2014. [DOI: 10.1016/j.molstruc.2013.10.023] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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4
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Resonant two-photon ionization and mass-analyzed threshold ionization spectroscopy of p-vinylaniline. Chem Phys 2012. [DOI: 10.1016/j.chemphys.2012.08.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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5
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6
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Nataraj A, Balachandran V, Karthick T. FT-IR and Raman spectra, DFT and SQMFF calculations for geometrical interpretation and vibrational analysis of 3-nitro-p-toluic acid. J Mol Struct 2012. [DOI: 10.1016/j.molstruc.2012.04.056] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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7
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Prabhu T, Periandy S, Ramalingam S. FT-IR and FT-Raman investigation, computed vibrational intensity analysis and computed vibrational frequency analysis on m-Xylol using ab-initio HF and DFT calculations. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 79:948-955. [PMID: 21550300 DOI: 10.1016/j.saa.2011.04.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2010] [Revised: 03/23/2011] [Accepted: 04/04/2011] [Indexed: 05/30/2023]
Abstract
The FT-IR and FT-Raman spectra of m-Xylol molecule have been recorded using Bruker IFS 66V spectrometer in the range 4000-100cm(-1). The molecular geometry and vibrational frequencies in the ground state are evaluated using the Hartree-fock (HF) and B3LYP with 6-31+G (d, p), 6-31++G (d, p) and 6-311++G (d, p) basis sets. The computed frequencies are scaled using a suitable scale factors to yield good agreement with the observed values. The HF and DFT analysis agree well with experimental observations. Comparison of the fundamental vibrational frequencies with calculated results by HF and B3LYP methods indicate that B3LYP/6-311++G (d, p) is superior to HF/6-31+G (d, p) for molecular vibrational problems. The complete data of this title compound provide some useful information for the study of substituted benzenes. The influences of Methyl groups on the geometry of benzene and its normal modes of vibrations have also been discussed.
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Affiliation(s)
- T Prabhu
- Department of Physics, A.V.C. College, Mayiladuthurai, Tamilnadu, India
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Arjunan V, Balamourougane PS, Saravanan I, Mohan S. Investigation of the structural and harmonic vibrational properties of 2-nitro-, 4-nitro- and 5-nitro-m-xylene by ab initio and density functional theory. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2009; 74:798-807. [PMID: 19716338 DOI: 10.1016/j.saa.2009.08.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2009] [Revised: 07/13/2009] [Accepted: 08/07/2009] [Indexed: 05/28/2023]
Abstract
The Fourier transform infrared (FTIR) and FT-Raman spectra of 2-nitro-m-xylene (2NMX), 4-nitro-m-xylene (4NMX) and 5-nitro-m-xylene (5NMX) have been recorded in the range 4000-400 and 4000-100 cm(-1), respectively. The experimental vibrational frequency was compared with that obtained theoretically by ab initio HF and DFT-B3LYP gradient calculations employing the standard 6-31G(d,p) basis set for the optimised geometries of the compounds. The complete vibrational assignment, analysis and correlation of the fundamental modes of the compounds were carried out using the experimental FTIR and FT-Raman data, and ab initio and DFT quantum chemical studies. The geometrical parameters and the wavenumbers of normal modes of vibration obtained from the HF and DFT methods are in good agreement with the experimental values. The potential energy distribution of the fundamental modes was calculated with ab initio force fields utilising Wilson's FG matrix method. The influence of bulky methyl groups on the nitro group fundamental modes and on the ring skeletal vibrations are investigated.
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Affiliation(s)
- V Arjunan
- Department of Chemistry, Kanchi Mamunivar Centre for Post-Graduate Studies, Puducherry 605 008, India.
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Arjunan V, Mohan S. Fourier transform infrared and FT-Raman spectra, assignment, ab initio, DFT and normal co-ordinate analysis of 2-chloro-4-methylaniline and 2-chloro-6-methylaniline. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2009; 72:436-444. [PMID: 19081287 DOI: 10.1016/j.saa.2008.10.017] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2008] [Revised: 09/30/2008] [Accepted: 10/17/2008] [Indexed: 05/27/2023]
Abstract
The Fourier transform infrared (FTIR) and FT-Raman spectra of 2-chloro-4-methylaniline and 2-chloro-6-methylaniline have been measured in the range 4000-400 and 4000-100cm(-1), respectively. Utilising the observed FTIR and FT-Raman data, a complete vibrational assignment and analysis of the fundamental modes of the compounds were carried out. The vibrational frequency which were determined experimentally are compared with those obtained theoretically from ab initio HF and DFT gradient calculations employing the HF/6-31G(d,p) and B3LYP/6-31G(d,p) methods for optimised geometries. The geometries and normal modes of vibration obtained from the HF and DFT methods are in good agreement with the experimental data. The normal co-ordinate analysis was also carried out on the basis of ab initio force fields utilising Wilson's FG matrix method. The manifestations of NH-pi interactions and the influence of bulky chlorine and methyl group on the vibrational modes of the amino group are investigated.
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Affiliation(s)
- V Arjunan
- Department of Chemistry, Kanchi Mamunivar Centre for Post-Graduate Studies, Puducherry 605 008, India.
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Fourier transform infrared and FT-Raman spectral analysis and ab initio calculations for 4-chloro-2-methylaniline and 4-chloro-3-methylaniline. J Mol Struct 2008. [DOI: 10.1016/j.molstruc.2008.05.053] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Huang J, Lin JL, Tzeng WB. Mass analyzed threshold ionization spectroscopy of the 35Cl and 37Cl isotopomers of p-chlorophenol and isotope effect. Chem Phys Lett 2006. [DOI: 10.1016/j.cplett.2006.02.075] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Lin JL, Li C, Tzeng WB. Mass-analyzed threshold ionization spectroscopy of p-methylphenol and p-ethylphenol cations and the alkyl substitution effect. J Chem Phys 2004; 120:10513-9. [PMID: 15268078 DOI: 10.1063/1.1738645] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The mass-analyzed threshold ionization (MATI) spectra of p-methylphenol and p-ethylphenol have been recorded by ionizing via various vibronic levels. The adiabatic ionization energies (IEs) of p-methylphenol and p-ethylphenol are determined to be 65918+/-5 and 65628+/-5 cm(-1), which are less than that of phenol by 2707 and 2997 cm(-1), respectively. This redshift indicates that the interaction between the alkyl group and the ring of alkylphenols in the cationic D(0) state is greater than that in the neutral S(0) state. Moreover, a longer alkyl group gives rise to a greater redshift in the IE. Analysis of the MATI spectra shows that most of the active modes are related to the in-plane ring vibrations of these two cations. However, the length of the alkyl group has an insignificant effect on the frequency of the observed ring vibrations. No band with frequency less than 350 cm(-1) is observed for the p-methylphenol cation. In contrast, many low-frequency bands resulting from the characteristic motions (e.g., the C-C(2)H(5) torsion and C-C(2)H(5) and C-OH bending vibrations) appear in the MATI spectra of p-ethylphenol. The present results show that the ethyl group enhances the substituent-sensitive and many large-amplitude vibrations of the cation.
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Affiliation(s)
- Jung Lee Lin
- Institute of Atomic and Molecular Sciences, Academia Sinica, P.O. Box 23-166, No. 1 Section 4, Roosevelt Road, Taipei 106, Taiwan, Republic of China
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Altun A, Gölcük K, Kumru M. Structure and vibrational spectra of p-methylaniline: Hartree-Fock, MP2 and density functional theory studies. ACTA ACUST UNITED AC 2003. [DOI: 10.1016/s0166-1280(03)00531-1] [Citation(s) in RCA: 187] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Altun A, Gölcük K, Kumru M. Theoretical and experimental studies of the vibrational spectra of m-methylaniline. ACTA ACUST UNITED AC 2003. [DOI: 10.1016/s0166-1280(02)00698-x] [Citation(s) in RCA: 118] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Lin J, Lin JL, Tzeng WB. Mass analyzed threshold ionization spectroscopy of N-deuterium substituted indoline cation: isotope effect on the electronic transition, ionization and molecular vibration. Chem Phys Lett 2003. [DOI: 10.1016/s0009-2614(03)00331-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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16
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Lin J, Lin JL, Tzeng WB. Mass analyzed threshold ionization spectroscopy of p-methoxyaniline cation and influence of the OCH3 substituent. Chem Phys Lett 2003. [DOI: 10.1016/s0009-2614(03)00069-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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17
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Yang SC, Lin JL, Tzeng WB. Mass analyzed threshold ionization spectroscopy of p-ethylaniline cation: alkyl chain effects on ionization and molecular vibration. Chem Phys Lett 2002. [DOI: 10.1016/s0009-2614(02)01021-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Lin JL, Tzeng WB. Mass analyzed threshold ionization of deuterium substituted isotopomers of aniline and p-fluoroaniline: Isotope effect and site-specific electronic transition. J Chem Phys 2001. [DOI: 10.1063/1.1379586] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
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Lin JL, Tzeng WB. Mass analyzed threshold ionization of the 35Cl and 37Cl isotopomers of p-chloroaniline. J Chem Phys 2000. [DOI: 10.1063/1.1288147] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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