1
|
Al-Sawaff ZH, Basaran MA, Kandemirli F. A B3LYP/DFT Study on the Structure Activity Relationship for Benzimidazole Derivatives in Water Solution. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2022. [DOI: 10.1134/s1990793122040030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
2
|
Sebastian S, Sylvestre S, Sundaraganesan N, Karthikeyan B, Silvan S. Conformational analysis, molecular structure, spectroscopic, NBO, reactivity descriptors, wavefunction and molecular docking investigations of 5,6-dimethoxy-1-indanone: A potential anti Alzheimer's agent. Heliyon 2022; 8:e08821. [PMID: 35128106 PMCID: PMC8808071 DOI: 10.1016/j.heliyon.2022.e08821] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 11/15/2021] [Accepted: 01/20/2022] [Indexed: 11/25/2022] Open
Abstract
The objective of the present study is focused to elucidate the structure of potential anti-Alzheimer's compound 5,6-Dimethoxy-1-indanone (5,6-DMI) and study its binding interaction towards the active site by molecular docking studies. The structural and various spectroscopic tools are used to understand the various interaction behaviors of the title compound. The theoretical calculation of 5,6-DMI molecule is computed by Gaussian 09W software with Density functional B3LYP and CAM-B3LYP method utilizing 6-311G(d,p) as basis set. The Natural Bond Orbital (NBO) analysis has been performed to find all possible transition was correlate with electronic transition. The Non covalent interaction of 5,6-DMI molecule was examined by adopt Reduced Density Gradient (RDG) analysis and colour filled ELF diagram. Molecular docking results suggest that 5,6-DMI may exhibit inhibitory activity against apoE protein and may act as potential against Alzheimer's disease.
Collapse
Affiliation(s)
- S. Sebastian
- P.G & Research Department of Physics, St.Joseph's College of Arts & Science (Autonomous), Cuddalore, 607001, Tamilnadu, India
| | - S. Sylvestre
- Department of Chemistry, School of Mathematics and Natural Sciences, Mukuba University, Kitwe, 20382, Zambia
| | - N. Sundaraganesan
- Department of Physics (Engg.), Annamalai University, Annamalai Nagar, 608 002, India
| | - B. Karthikeyan
- Department of Chemistry, Annamalai University, Annamalai Nagar, 608 002, India
| | - S. Silvan
- P.G & Research Department of Biochemistry, St.Joseph's College of Arts & Science (Autonomous), Cuddalore, 607001, Tamilnadu, India
| |
Collapse
|
3
|
Control of the optical properties upon a reversible [2+2] cycloaddition of 3-(4-N,N-dibutylamino)-styryl)-3’-(dicyanovinyl)-bithiophene. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
4
|
Gadenne V, Grenier B, Praveen C, Marsal P, Valmalette JC, Patrone L, Raimundo JM. Combined SERS/DFT studies of push–pull chromophore self-assembled monolayers: insights into their surface orientation. Phys Chem Chem Phys 2019; 21:25865-25871. [DOI: 10.1039/c9cp04008k] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Having clear and deep information on the surface/interface of deposited molecules is of crucial importance for the development of efficient optoelectronic devices.
Collapse
Affiliation(s)
- V. Gadenne
- Aix Marseille Univ
- Université de Toulon
- CNRS
- IM2NP UMR 7334
- 13397 Marseille Cedex 20
| | - B. Grenier
- Aix Marseille Univ
- CNRS
- CINaM UMR 7325
- Campus de Luminy
- 13288 Marseille Cedex 09
| | - C. Praveen
- Aix Marseille Univ
- CNRS
- CINaM UMR 7325
- Campus de Luminy
- 13288 Marseille Cedex 09
| | - P. Marsal
- Aix Marseille Univ
- CNRS
- CINaM UMR 7325
- Campus de Luminy
- 13288 Marseille Cedex 09
| | - J. C. Valmalette
- Aix Marseille Univ
- Université de Toulon
- CNRS
- IM2NP UMR 7334
- 83957 La Garde Cedex
| | - L. Patrone
- Aix Marseille Univ
- Université de Toulon
- CNRS
- IM2NP UMR 7334
- 13397 Marseille Cedex 20
| | - J. M. Raimundo
- Aix Marseille Univ
- CNRS
- CINaM UMR 7325
- Campus de Luminy
- 13288 Marseille Cedex 09
| |
Collapse
|
5
|
Anharmonic vibrational and electronic spectral study of 2-amino-4-hydroxy-6–methylpyrimidine: A combined experimental (FTIR, FT-Raman, UV–Vis) and theoretical (DFT, MP2) approach. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.07.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
6
|
Malytskyi V, Gadenne V, Ksari Y, Patrone L, Raimundo JM. Synthesis and characterization of thiophene-based push-pull chromophores for tuning the electrical and optical properties of surfaces with controlled SAM formation. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.08.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
7
|
Almutairi MS, Xavier S, Sathish M, Ghabbour HA, Sebastian S, Periandy S, Al-Wabli RI, Attia MI. Spectroscopic (FT-IR, FT-Raman, UV, 1H and 13C NMR) profiling and computational studies on methyl 5-methoxy-1H-indole-2-carboxylate: A potential precursor to biologically active molecules. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2016.12.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
8
|
Saraçoğlu H, Ekici Ö. Spectroscopic characterization, X-ray structure and DFT studies on 4-[3-(2,5-dimethylphenyl)-3-methylcyclobutyl]-N-methylthiazol-2-amine. J STRUCT CHEM+ 2016. [DOI: 10.1134/s002247661507015x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
9
|
Makowska-Janusik M, Kajzar F, Miniewicz A, Mydlova L, Rau I. First Principle Calculations of the Electronic and Vibrational Properties of the 3-(1,1-Dicyanoethenyl)-1-phenyl-4,5-dihydro-1H-pyrazole Molecule. J Phys Chem A 2015; 119:1347-58. [DOI: 10.1021/jp510102q] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
| | - Francois Kajzar
- Faculty of Applied
Chemistry and Materials Science, University Politehnica of Bucharest, Bucharest, Romania
- Laboratoire de Chimie,
CNRS, Université Claude Bernard, ENS-Lyon, 46 Allée d’Italie, 69364 Lyon Cedex 07, France
| | - Andrzej Miniewicz
- Advanced Materials
Engineering and Modelling Group, Faculty of Chemistry, Wroclaw University of Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
| | - Lucia Mydlova
- Institute of Physics, Jan Dlugosz University, Al. Armii Krajowei 13/15, 42-200 Czestochowa, Poland
| | - Ileana Rau
- Faculty of Applied
Chemistry and Materials Science, University Politehnica of Bucharest, Bucharest, Romania
| |
Collapse
|
10
|
Balachandran V, Karpagam V, Revathi B, Kavimani M, Santhi G. Conformational stability, vibrational and NMR analysis, chemical potential and thermodynamical parameter of 3-tert-butyl-4-hydroxyanisole. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 135:1039-1051. [PMID: 25173520 DOI: 10.1016/j.saa.2014.07.093] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2014] [Revised: 07/12/2014] [Accepted: 07/29/2014] [Indexed: 06/03/2023]
Abstract
The FT-IR and FT-Raman spectra of 3-tert-butyl-4-hydroxyanisole (TBHA) molecule have been recorded in the region 4000-400 cm(-1) and 3500-100 cm(-1), respectively. Optimized geometrical structure, harmonic vibrational frequencies has been computed by B3LYP level using 6-31G (d,p) and 6-311+G (d,p) basis sets. The observed FT-IR and FT-Raman vibrational frequencies are analyzed and compared with theoretically predicted vibrational frequencies. The geometries and normal modes of vibration obtained from DFT method are in good agreement with the experimental data. The Mulliken charges, the natural bonding orbital (NBO) analysis, the first-order hyperpolarizability of the investigated molecule were computed using DFT calculations. Besides, charge transfer occurring in the molecule between HOMO and LUMO energies, frontier energy gap, molecular electrostatic potential (MEP) were calculated and analyzed. The isotropic chemical shift computed by (1)H and (13)C nuclear magnetic resonance (NMR) chemical shifts of the TBHA calculated using the gauge invariant atomic orbital (GIAO) method also shows good agreement with experimental observations.
Collapse
Affiliation(s)
- V Balachandran
- Research Department of Physics, AA Government Arts College, Musiri 621211, India.
| | - V Karpagam
- Department of Physics, Sri Saradha College for Women, Perambalur 621212, India
| | - B Revathi
- Research Department of Physics, AA Government Arts College, Musiri 621211, India
| | - M Kavimani
- Research Department of Physics, AA Government Arts College, Musiri 621211, India
| | - G Santhi
- PG Department of Physics, Government Arts College, Karur 639005, India
| |
Collapse
|
11
|
Malytskyi V, Simon JJ, Patrone L, Raimundo JM. Synthesis, self-assembly and characterization of a novel push–pull thiophene-based chromophore on a gold surface. RSC Adv 2015. [DOI: 10.1039/c5ra02200b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A self-assembled dense monolayer based on a non-charged push–pull chromophore is clearly evidenced by electrochemical, XPS and STM analysis. Associated with good film properties a conducting behavior consistent with the structure of the SAM-organized push–pull is also shown.
Collapse
Affiliation(s)
- Volodymyr Malytskyi
- Centre Interdisciplinaire de Nanoscience de Marseille
- Aix-Marseille Université
- CNRS
- CINaM UMR 7325
- 13288 Marseille Cedex 09
| | - Jean-Jacques Simon
- Institut Matériaux Microélectronique Nanosciences de Provence
- Aix-Marseille Université
- CNRS
- Université de Toulon
- IM2NP UMR 7334
| | - Lionel Patrone
- Institut Matériaux Microélectronique Nanosciences de Provence
- Aix-Marseille Université
- CNRS
- Université de Toulon
- IM2NP UMR 7334
| | - Jean-Manuel Raimundo
- Centre Interdisciplinaire de Nanoscience de Marseille
- Aix-Marseille Université
- CNRS
- CINaM UMR 7325
- 13288 Marseille Cedex 09
| |
Collapse
|
12
|
Karakaya M, Çiçek A, Ucun F, Yildiz M. Investigations on stabilities and intermolecular interactions of different naphthalene derivatives dimers by using B3LYP and M06-2X density functional calculations. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2014. [DOI: 10.1134/s0036024414120127] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
13
|
Ferrón CC, Sheynin Y, Li M, Patra A, Bendikov M, López Navarrete JT, Hernández V, Ruiz Delgado MC. Raman Spectroscopic Characterization of Polyselenophenes and Poly(3,4-ethylenenedioxyselenophene)s. Isr J Chem 2014. [DOI: 10.1002/ijch.201400024] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
14
|
Karabacak M, Cinar M, Kurt M, Poiyamozhi A, Sundaraganesan N. The spectroscopic (FT-IR, FT-Raman, UV and NMR) first order hyperpolarizability and HOMO-LUMO analysis of dansyl chloride. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 117:234-244. [PMID: 23994679 DOI: 10.1016/j.saa.2013.07.095] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2012] [Accepted: 07/29/2013] [Indexed: 06/02/2023]
Abstract
The solid phase FT-IR and FT-Raman spectra of dansyl chloride (DC) have been recorded in the regions 400-4000 and 50-4000 cm(-1), respectively. The spectra have been interpreted in terms of fundamentals modes, combination and overtone bands. The structure of the molecule has been optimized and the structural characteristics have been determined by density functional theory (B3LYP) method with 6-311++G(d,p) as basis set. The vibrational frequencies were calculated for most stable conformer and were compared with the experimental frequencies, which yield good agreement between observed and calculated frequencies. The infrared and Raman spectra have also been predicted from the calculated intensities. (1)H and (13)CNMR spectra were recorded and (1)H and (13)C nuclear magnetic resonance chemical shifts of the molecule were calculated using the gauge independent atomic orbital (GIAO) method. UV-Visible spectrum of the compound was recorded in the region 200-600 nm and the electronic properties HOMO and LUMO energies were measured by time-dependent TD-DFT approach. Nonlinear optical and thermodynamic properties were interpreted. All the calculated results were compared with the available experimental data of the title molecule.
Collapse
Affiliation(s)
- M Karabacak
- Department of Mechatronics Engineering, H.F.T. Technology Faculty, Celal Bayar University, 45400 Turgutlu, Manisa, Turkey
| | | | | | | | | |
Collapse
|
15
|
Joshi BD, Srivastava A, Gupta V, Tandon P, Jain S. Spectroscopic and quantum chemical study of an alkaloid aristolochic acid I. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 116:258-269. [PMID: 23954541 DOI: 10.1016/j.saa.2013.07.036] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2013] [Revised: 07/10/2013] [Accepted: 07/21/2013] [Indexed: 06/02/2023]
Abstract
Aristolochic acids (AAs) (Aristolochiaceae) are used in the traditional Chinese herb medicine. We have presented the geometry optimization, electrostatic potential surface, frontier orbital energy gap and vibrational wavenumbers of aristolochic acid I (AA I) using ab initio Hartree-Fock (HF) and density functional theory (DFT/B3LYP) method employing 6-311G(d,p) basis set. A complete vibrational assignment has been done on the basis of calculations on monomer and dimer of AA I. The UV-vis absorption spectrum has been recorded in ethanol solvent and compared with the calculated one in the gas phase as well as in solvent environment (integral-equation formalism polarizable continuum model; IEF-PCM) using TD-DFT/6-31G basis set. A short outline of the NBO analysis segment with their structural meaning has been presented. The variation of thermodynamic properties with temperature was calculated theoretically and the thermal response of the compound has been recorded with the help of differential scanning calorimetry (DSC) in N2 environment.
Collapse
Affiliation(s)
- Bhawani Datt Joshi
- Department of Physics, University of Lucknow, Lucknow 226007, India; Department of Physics, Siddhanath Sc. Campus, Tribhuvan University, Nepal
| | | | | | | | | |
Collapse
|
16
|
Vijayalakshmi S, Kalyanaraman S, Krishnakumar V. Nonlinear optical analyses of organic N-(9-Anthrylmethylidene) methylamine Schiff base. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 109:253-258. [PMID: 23542516 DOI: 10.1016/j.saa.2013.03.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2012] [Revised: 02/22/2013] [Accepted: 03/03/2013] [Indexed: 06/02/2023]
Abstract
The organic NLO Schiff base of N-(9-Anthrylmethylidene) methylamine was synthesized by condensation process. The material was characterized through Powder XRD, FT-IR, and Raman techniques. The various planes of reflection are identified from the Powder XRD pattern. The formation of Schiff base is confirmed through FT-IR and Raman analysis. The intra molecular charge transfer interaction and the existence of the first-order molecular hyperpolarizability (β) are identified from the red shift of the UV-Vis analysis. The structure of the molecule was optimized by density functional theory (DFT) using B3LYP method with 6-31G basis set. The NBO analysis is used to interpret the delocalization. The dipole moment and first hyperpolarizability values were also computed by HF/6-31G. These values indicate that the compound is a good candidate with nonlinear optical properties. This is the first time report on the existence of a second harmonic generation (SHG), χ(2), efficiency that has been identified by Powder Kurtz-Perry method.
Collapse
Affiliation(s)
- S Vijayalakshmi
- PG and Research Department of Physics, Sri Paramakalyani College, Alwarkurichi, India
| | | | | |
Collapse
|
17
|
Sudha S, Sundaraganesan N, Vanchinathan K, Muthu K, Meenakshisundaram SP. Spectroscopic (FTIR, FT-Raman, NMR and UV) and molecular structure investigations of 1,5-diphenylpenta-2,4-dien-1-one: a combined experimental and theoretical approach. MOLECULAR SIMULATION 2013. [DOI: 10.1080/08927022.2012.727210] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
18
|
Balachandran V, Karunakaran V. Quantum mechanical study of the structure and vibrational spectroscopic (FT-IR and FT-Raman), first-order hyperpolarizability, NBO and HOMO-LUMO studies of 4-bromo-3-nitroanisole. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 106:284-298. [PMID: 23416886 DOI: 10.1016/j.saa.2012.12.070] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2012] [Revised: 12/17/2012] [Accepted: 12/21/2012] [Indexed: 06/01/2023]
Abstract
The FT-IR and FT-Raman spectra of 4-bromo-3-nitroanisole (BNA) molecule have been recorded in the region 4000-400 cm(-1) and 3500-100 cm(-1), respectively. Optimized geometrical structure, harmonic vibrational frequencies, intensities, reduced mass, force constants and depolarization ratio have been computed by ab initio HF and the B3LYP density functional levels using 6-311++G (d,p) basis set. The observed FT-IR and FT-Raman vibrational frequencies are analyzed and compared with theoretically predicted vibrational frequencies. The geometries and normal modes of vibration obtained from DFT method are in good agreement with the experimental data. The first-order hyperpolarizability (β) of the investigated molecule were computed using DFT calculations. Besides, charge transfer occurring in the molecule between HOMO and LUMO energies, frontier energy gap, molecular electrostatic potential (MEP) were calculated and analyzed. The influences of bromine atom, nitrile group and methyl group on the geometry of benzene and its normal modes of vibrations have also been discussed.
Collapse
Affiliation(s)
- V Balachandran
- PG and Research Department of Physics, A A Government Arts College, Musiri, Tiruchirappalli 621 211, India.
| | | |
Collapse
|
19
|
Binoy J, Marchewka MK, Jayakumar VS. The 'partial resonance' of the ring in the NLO crystal melaminium formate: study using vibrational spectra, DFT, HOMO-LUMO and MESP mapping. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 104:97-109. [PMID: 23266682 DOI: 10.1016/j.saa.2012.11.046] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2012] [Revised: 11/09/2012] [Accepted: 11/15/2012] [Indexed: 06/01/2023]
Abstract
The molecular geometry and vibrational spectral investigations of melaminium formate, a potential material known for toxicity and NLO activity, has been performed. The FT IR and FT Raman spectral investigations of melaminium formate is performed aided by the computed spectra of melaminium formate, triazine, melamine, melaminium and formate ion, along with bond orders and PED, computed using the density functional method (B3LYP) with 6-31G(d) basis set and XRD data, to reveal intermolecular interactions of amino groups with neighbor formula units in the crystal, intramolecular H⋯H repulsion of amino group hydrogen with protonating hydrogen, consequent loss of resonance in the melaminium ring, restriction of resonance to N(3)C(1)N(1) moiety leading to special type resonance of the ring and the resonance structure of CO(2) group of formate ion. The 3D matrix of hyperpolarizability tensor components has been computed to quantify NLO activity of melamine, melaminium and melaminium formate and the hyperpolarizability enhancement is analyzed using computed plots of HOMO and LUMO orbitals. A new mechanism of proton transfer responsible for NLO activity has been suggested, based on anomalous IR spectral bands in the high wavenumber region. The computed MEP contour maps have been used to analyze the interaction of melaminium and formate ions in the crystal.
Collapse
Affiliation(s)
- J Binoy
- Department of Physics, Government College, Nedumangadu, Thiruvananthapuram 695 541, Kerala, India.
| | | | | |
Collapse
|
20
|
Enchev V, Monev V, Markova N, Rogozherov M, Angelova S, Spassova M. A model system with intramolecular hydrogen bonding: Effect of external electric field on the tautomeric conversion and electronic structures. COMPUT THEOR CHEM 2013. [DOI: 10.1016/j.comptc.2012.11.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
21
|
Karunakaran V, Balachandran V. FT-IR, FT-Raman spectra, NBO, HOMO-LUMO and thermodynamic functions of 4-chloro-3-nitrobenzaldehyde based on ab initio HF and DFT calculations. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 98:229-239. [PMID: 22958978 DOI: 10.1016/j.saa.2012.08.003] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2012] [Revised: 07/27/2012] [Accepted: 08/07/2012] [Indexed: 06/01/2023]
Abstract
FT-IR (4000-400 cm(-1)) and FT-Raman (3500-100 cm(-1)) spectral measurements of 4-chloro-3-nitrobenzaldehyde have been done. Ab initio (HF/6-311+G(d,p)) and DFT (B3LYP/6-311+G(d,p)) calculations have been performed giving energies, optimized structures, harmonic vibrational frequencies, infrared intensities and Raman activities. A detailed interpretation of the FT-IR and FT-Raman spectra of 4-chloro-3-nitrobenzaldehyde are reported on the basis of the calculated potential energy distribution. Stability of the molecule arising from hyper conjugative interactions, charge delocalization has been analyzed using natural bond orbital (NBO) analysis. The HOMO and LUMO energy gap reveals that the energy gap reflects the chemical activity of the molecule. The thermodynamic functions of the title compound have been performed by HF/6-311+G(d,p) and B3LYP/6-311+G(d,p). The observed and calculated wave numbers are found to be in good agreement. The experimental spectra also coincide satisfactorily with those of theoretically constructed spectra. Thermodynamic functions were calculated using vibrational wave numbers for different temperatures.
Collapse
Affiliation(s)
- V Karunakaran
- Research Department of Physics, Government Arts College, Ariyalur 621 713, India
| | | |
Collapse
|
22
|
Poiyamozhi A, Sundaraganesan N, Karabacak M, Tanrıverdi O, Kurt M. The spectroscopic (FTIR, FT-Raman, UV and NMR), first-order hyperpolarizability and HOMO–LUMO analysis of 4-amino-5-chloro-2-methoxybenzoic acid. J Mol Struct 2012. [DOI: 10.1016/j.molstruc.2012.05.008] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
23
|
Madhavan VS, Mary YS, Varghese HT, Panicker CY, Mathew S, Van Alsenoy C, Vinsova J. Vibrational spectroscopic studies and computational calculations of 5-chloro-2-(3-chlorophenylcarbamoyl)phenylacetate. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 89:308-316. [PMID: 22297035 DOI: 10.1016/j.saa.2011.12.056] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2011] [Revised: 11/30/2011] [Accepted: 12/21/2011] [Indexed: 05/31/2023]
Abstract
The FT-IR and FT-Raman spectra of 5-chloro-2-(3-chlorophenylcarbamoyl)phenylacetate were studied. The vibrational wave numbers and corresponding vibrational assignments were examined theoretically using the Gaussian 03 set of quantum chemistry codes and the normal modes are assigned by Potential Energy Distribution calculations. The synthesis, elemental analysis and NMR values are presented. The red shift of the NH stretching wave number in the infrared spectrum from the computed wave number indicates the weakening of the NH bond resulting in proton transfer to the neighboring oxygen atom. The first hyperpolarizability, infrared intensities and Raman activities are reported. The calculated first hyperpolarizability is comparable with the reported values of similar derivatives and is an attractive object for future studies of nonlinear optics. The geometrical parameters of the title compound are in agreement with that of similar reported derivatives.
Collapse
Affiliation(s)
- V S Madhavan
- Department of Physics, MES Ponnani College, Ponnani South, Malappuram, Kerala, India
| | | | | | | | | | | | | |
Collapse
|
24
|
Subramanian N, Sundaraganesan N, Jayabharathi J. Molecular structure, spectroscopic (FT-IR, FT-Raman, NMR, UV) studies and first-order molecular hyperpolarizabilities of 1,2-bis(3-methoxy-4-hydroxybenzylidene)hydrazine by density functional method. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2010; 76:259-269. [PMID: 20413344 DOI: 10.1016/j.saa.2010.03.033] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2010] [Revised: 03/16/2010] [Accepted: 03/17/2010] [Indexed: 05/29/2023]
Abstract
Quantum chemical calculations of energies, geometrical structure and vibrational wavenumbers of 1,2-bis(3-methoxy-4-hydroxybenzylidene)hydrazine [vanillin azine (VA)] were carried out by using density functional (DFT/B3LYP) method with 6-31G(d) as basis set. The optimized geometrical parameters obtained by DFT calculations are in good agreement with single crystal XRD data. The vibrational spectral data obtained from solid phase FT-IR and FT-Raman spectra are assigned based on the results of the theoretical calculations. The observed spectra are found to be in good agreement with calculated values. The electric dipole moment (mu) and the first hyperpolarizability (beta) values of the investigated molecule have been computed using ab initio quantum mechanical calculations. The calculation results also show that the VA molecule might have microscopic nonlinear optical (NLO) behavior with non-zero values. A detailed interpretation of the infrared and Raman spectra of VA was also reported. The energy and oscillator strength calculated by time-dependent density functional theory (TD-DFT) results complements with the experimental findings. The calculated HOMO and LUMO energies show that charge transfer occurs within the molecule. The theoretical NMR chemical shifts complement with experimentally measured ones.
Collapse
Affiliation(s)
- N Subramanian
- Govt College of Education, Komarapalayam 638183, Tamil Nadu, India
| | | | | |
Collapse
|
25
|
Abraham JP, Sajan D, Shettigar V, Dharmaprakash S, Němec I, Hubert Joe I, Jayakumar V. Efficient π-electron conjugated push–pull nonlinear optical chromophore 1-(4-methoxyphenyl)-3-(3,4-dimethoxyphenyl)-2-propen-1-one: A vibrational spectral study. J Mol Struct 2009. [DOI: 10.1016/j.molstruc.2008.06.031] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
26
|
Chen R, Zhao G, Yang X, Jiang X, Liu J, Tian H, Gao Y, Liu X, Han K, Sun M, Sun L. Photoinduced intramolecular charge-transfer state in thiophene-π-conjugated donor–acceptor molecules. J Mol Struct 2008. [DOI: 10.1016/j.molstruc.2007.05.045] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
27
|
Vijayakumar T, Hubert Joe I, Reghunadhan Nair C, Jayakumar V. Efficient π electrons delocalization in prospective push–pull non-linear optical chromophore 4-[N,N-dimethylamino]-4′-nitro stilbene (DANS): A vibrational spectroscopic study. Chem Phys 2008. [DOI: 10.1016/j.chemphys.2007.10.033] [Citation(s) in RCA: 171] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|