1
|
Katopodi A, Safari K, Kalospyros A, Politopoulos K, Alexandratou E, Detsi A. Preparation and characterization of solid lipid nanoparticles incorporating bioactive coumarin analogues as photosensitizing agents. Colloids Surf B Biointerfaces 2023; 229:113439. [PMID: 37422991 DOI: 10.1016/j.colsurfb.2023.113439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Revised: 06/29/2023] [Accepted: 07/03/2023] [Indexed: 07/11/2023]
Abstract
Daphnetin (7,8-dihydroxy-coumarin, DAPH) is a naturally occurring coumarin presenting a wide array of biological activities. In the present study, daphnetin and its novel synthetic analogue 7,8-dihydroxy-4-methyl-3-(4-hydroxyphenyl)-coumarin (DHC) were encapsulated in solid lipid nanoparticles (SLNs) with Encapsulation Efficiency values of 80% and 40%, respectively. Nanoparticles of an average hydrodynamic diameter of approximately 250 nm were formed, showing a good stability in aqueous dispersion (polydispersity index 0.3-0.4), as determined by Dynamic Light Scattering (DLS). The SLNs were also characterized using Fourier Transform-Infrared (FT-IR) spectroscopy and Thermogravimetric Analysis (TGA). TEM images of the blank-SLNs indicated a spherical morphology and a size of 20-50 nm. The release studies of the coumarin analogues indicated a non-Fickian diffusion mechanism, while the release profiles better fitted on the Higuchi kinetic model. Moreover, the coumarin analogues and their SLNs were examined for their antioxidant activity using DPPH and anti-lipid peroxidation assays, exhibiting stronger antioxidant activity when encapsulated than in their free form. The coumarin derivatives and their SLNs were examined for their photodynamic therapy (PDT) efficacy against the human squamous carcinoma A431 cell line, with DHC coumarin both in its free and encapsulated form exhibiting significant PDT activity, reducing the cell viability to 11% after irradiation with a fluence rate of 2.16 J/cm2. Finally, the intracellular localization studies indicated the enhanced cellular uptake of the coumarin analogues when loaded in the SLNs.
Collapse
Affiliation(s)
- Annita Katopodi
- Laboratory of Organic Chemistry, School of Chemical Engineering, National Technical University of Athens, Zografou, Campus, 15780 Athens, Greece; Laboratory of Biomedical Optics and Applied Biophysics, School of Electrical and Computer Engineering, National Technical University of Athens, Zografou Campus, 15780 Athens, Greece
| | - Kyriaki Safari
- Laboratory of Organic Chemistry, School of Chemical Engineering, National Technical University of Athens, Zografou, Campus, 15780 Athens, Greece
| | - Alexandros Kalospyros
- Laboratory of Organic Chemistry, School of Chemical Engineering, National Technical University of Athens, Zografou, Campus, 15780 Athens, Greece; Laboratory of Biomedical Optics and Applied Biophysics, School of Electrical and Computer Engineering, National Technical University of Athens, Zografou Campus, 15780 Athens, Greece
| | - Konstantinos Politopoulos
- Laboratory of Biomedical Optics and Applied Biophysics, School of Electrical and Computer Engineering, National Technical University of Athens, Zografou Campus, 15780 Athens, Greece
| | - Eleni Alexandratou
- Laboratory of Biomedical Optics and Applied Biophysics, School of Electrical and Computer Engineering, National Technical University of Athens, Zografou Campus, 15780 Athens, Greece
| | - Anastasia Detsi
- Laboratory of Organic Chemistry, School of Chemical Engineering, National Technical University of Athens, Zografou, Campus, 15780 Athens, Greece.
| |
Collapse
|
2
|
Ramuthai M, Jeyavijayan S, Jayram ND. Molecular Structure, Spectroscopic Investigation, Docking and in Vitro Cytotoxicity Studies of 7-Methoxycoumarin as anti-Leukemia Agent. Polycycl Aromat Compd 2021. [DOI: 10.1080/10406638.2021.1994430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- M. Ramuthai
- Department of Physics, Kalasalingam Academy of Research and Education, Krishnankoil, India
| | - S. Jeyavijayan
- Department of Physics, Kalasalingam Academy of Research and Education, Krishnankoil, India
| | - Naidu Dhanpal Jayram
- Department of Physics, Kalasalingam Academy of Research and Education, Krishnankoil, India
| |
Collapse
|
3
|
Deokar RG, Barik A. Transient species of esculetin produced in pulse radiolysis: experimental and quantum chemical investigations. Phys Chem Chem Phys 2020; 22:18573-18584. [PMID: 32785355 DOI: 10.1039/d0cp03130e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Radiation chemical studies of esculetin (E), a dihydroxycoumarin derivative, were performed using a pulse radiolysis technique employing kinetic spectrometer and quantum chemical calculations. Both the oxidizing radicals, hydroxyl (˙OH) and azide (N3˙) radicals, and the reducing radical hydrated electron (eaq-) and hydrogen atom (H˙) reactions of E were used for the present study. The reaction of ˙OH and N3˙ radicals with E produced transients that absorbed at 410 nm; additionally, another broad band at 510 nm was observed for the ˙OH radical reaction. The reaction of ˙OH radicals with E formed the phenoxyl radical and ˙OH-adducts. It was revealed that 32% of the ˙OH radical reaction products of E were oxidizing in nature and 47% were reducing in nature. The carbonyl group of E was reduced by eaq- and subsequently converted to a neutral radical adduct upon protonation. Similarly, the H˙ atom reaction with E yielded a neutral adduct along with H˙ atom addition products. The transient product absorbed at 380 nm when E was reduced by eaq- and the H˙ atom; additionally, the H˙ atom addition product absorbed at 500 nm. In the case of E, the oxidizing radicals were reactive towards the aromatic ring and the phenolic OH group, whereas the reducing radicals were reactive towards the carbonyl group of E. Quantum chemical calculations using DFT and TD-DFT methods have supported the experimental observation. There was good agreement between the experimental and theoretical data on a number of occasions. Based on the energetics of the transients, it was suggested that the addition products were exothermic in nature. In the addition reaction with the ˙OH radical, there was a slight increase in the C-C bond length adjacent to the addition site compared to the remaining bonds. During the reduction process through the carbonyl group, the [double bond splayed left]C[double bond, length as m-dash]O bond length was increased from 1.221 Å to 1.358 Å. There was an excellent correlation between the calculated and experimentally observed absorption maximum for the oxidized product of E. Overall, these redox studies may find application in developing hydroxycoumarin derivatives as an antioxidant or as an electron transporting agent in biochemical processes. In addition, this information will be helpful for understanding the mechanism of removing pollutant dyes by advanced oxidation processes.
Collapse
Affiliation(s)
- Rupali G Deokar
- Department of Chemistry, Savitribai Phule Pune University, Pune 411007, India
| | | |
Collapse
|
4
|
Kumar A, Srivastava AK, Gangwar SK, Misra N, Brahmachari G, Mondal A, Mondal S. FT-IR, UV–visible, and NMR Spectral Analyses, Molecular Structure, and Properties of Nevadensin Revealed by Density Functional Theory and Molecular Docking. Polycycl Aromat Compd 2020. [DOI: 10.1080/10406638.2018.1458741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Abhishek Kumar
- Department of Physics, University of Lucknow, Lucknow, Uttar Pradesh, India
| | - Ambrish Kumar Srivastava
- P. G. Department of Physics, Veer Kunwar Singh University, Ara, Bihar, India
- Laboratory of Natural Products & Organic Synthesis, Department of Chemistry, Visva-Bharati (a Central University), Santiniketan, West Bengal, India
| | | | - Neeraj Misra
- Department of Physics, University of Lucknow, Lucknow, Uttar Pradesh, India
| | - Goutam Brahmachari
- P. G. Department of Physics, Veer Kunwar Singh University, Ara, Bihar, India
- Laboratory of Natural Products & Organic Synthesis, Department of Chemistry, Visva-Bharati (a Central University), Santiniketan, West Bengal, India
| | - Avijit Mondal
- P. G. Department of Physics, Veer Kunwar Singh University, Ara, Bihar, India
- Laboratory of Natural Products & Organic Synthesis, Department of Chemistry, Visva-Bharati (a Central University), Santiniketan, West Bengal, India
| | - Sadan Mondal
- P. G. Department of Physics, Veer Kunwar Singh University, Ara, Bihar, India
- Laboratory of Natural Products & Organic Synthesis, Department of Chemistry, Visva-Bharati (a Central University), Santiniketan, West Bengal, India
| |
Collapse
|
5
|
Kamuran Sarac. Synthesis, Experimental and Theoretical Characterization of 4-(((4-Ethyl-5-(Thiophene-2-yl)-4H-1,2,4-Triazol-3-yl)Thio)Methyl)-6-Methoxycoumarin. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2020. [DOI: 10.1134/s1990793120010273] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
6
|
Makwana H, Pandya D. Bioactivity-guided isolation, characterization, and estimation of esculetin – A Potential Marker from Launaea pinnatifida cass. Pharmacogn Mag 2020. [DOI: 10.4103/pm.pm_264_20] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
|
7
|
Shinde RG, Khan AA, Barik A. Formation of two centre three electron bond by hydroxyl radical induced reaction of thiocoumarin: evidence from experimental and theoretical studies. Free Radic Res 2019; 53:629-640. [PMID: 31072168 DOI: 10.1080/10715762.2019.1617417] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Radiation chemical studies of thioesculetin (1), a thioketone derivative of coumarin, were performed by both pulse radiolysis technique and DFT calculations. Hydroxyl (•OH) radical reaction with 1 resulted transients absorbing at 320, 360 and 500 nm. To identify the nature of the transients, the reaction was studied with specific one-electron oxidant (N3•) radical, where 360 nm band was absent. The transient absorption at 500 nm was concentration-dependent. The overall impression for •OH radical reaction was that the transient absorbing at 320, 360 and 500 nm was due to sulphur centred monomer radical, hydroxysulfuranyl and dimer radical of 1 respectively. The equilibrium constant between the monomer to dimer radical was 3.75 × 104 M-1. From the transients' redox nature, it was observed that 57 and 24% of •OH radical yielded to oxidising and reducing products respectively. Further, the product analysis by HPLC suggested that the dimer radical disproportionate to esculetin and thioesculetin. DFT energy calculation for all the possible transients revealed that dimer radical has the lowest energy. The HOMO of 1 and its monomer radical suggested that the electron density was localised on the sulphur atom. The bond length between the two sulphur atoms in dimer radical was 2.88 Å which was less than the van der Waals distance. Bond order between the two sulphur atoms was 0.55, suggesting that the bond was two centre three electron (2c-3e). From TD-DFT calculation, the electronic transition of dimer radical was at 479 nm which was in close agreement with the experimental value. The nature of the electronic transition was σ → σ* from a 2c - 3e bond.
Collapse
Affiliation(s)
- Rupali G Shinde
- a Department of Chemistry , Savitribai Phule Pune University , Pune , India.,b Radiation and Photochemistry Division , Bhabha Atomic Research Centre , Mumbai , India
| | - Ayesha A Khan
- a Department of Chemistry , Savitribai Phule Pune University , Pune , India
| | - Atanu Barik
- b Radiation and Photochemistry Division , Bhabha Atomic Research Centre , Mumbai , India
| |
Collapse
|
8
|
XRD, FT–IR and UV characterization, hirshfeld surface analysis and local-global chemical descriptor studies of (E)-2-((3-fluorophenylimino)methyl)-3-methoxyphenol (1) and (E)-2-((2-fluorophenylimino)methyl)-3-methoxyphenol (2). J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.04.030] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
|
9
|
Demircioğlu Z, Özdemir FA, Dayan O, Şerbetçi Z, Özdemir N. Synthesis, X-ray diffraction method, spectroscopic characterization (FT-IR, 1H and 13C NMR), antimicrobial activity, Hirshfeld surface analysis and DFT computations of novel sulfonamide derivatives. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.02.063] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
10
|
Alam M, Alam MJ, Azaz S, Parveen M, Park S, Ahmad S. DFT/TD-DFT calculations, spectroscopic characterizations (FTIR, NMR, UV–vis), molecular docking and enzyme inhibition study of 7-benzoyloxycoumarin. Comput Biol Chem 2018; 73:65-78. [DOI: 10.1016/j.compbiolchem.2018.01.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 01/01/2018] [Accepted: 01/21/2018] [Indexed: 10/18/2022]
|
11
|
Yilmaz M, Aydin B, Dogan O, Dereli O. Molecular structure and spectral investigations of 3,5-Di-tert-butyl-o-benzoquinone. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2016.08.067] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
12
|
Erdogdu Y, Saglam S, Gulluoglu MT. An investigations on the molecular structure, FT-IR, FT-Raman and NMR spectra of 1-(p-tolylsulfonyl) pyrrole by theoretical and experimental approach. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 146:88-96. [PMID: 25813166 DOI: 10.1016/j.saa.2015.03.031] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Revised: 01/29/2015] [Accepted: 03/01/2015] [Indexed: 06/04/2023]
Abstract
Fourier-Transform-Infrared, Fourier-Transform-Raman and Nuclear Magnetic Rezonans spectra of 1-(p-tolylsulfonyl) pyrrole molecule have been recorded. In the powder form, vibrational spectra of 1-(p-tolylsulfonyl) pyrrol molecule were investigated in the region 4000-400 cm(-1) and 3500-50 cm(-1), respectively. The conformational analysis, geometrical structure, molecular electrostatic potential map, HOMO-LUMO and vibrational spectroscopic properties of the isolated 1-(p-tolylsulfonyl) pyrrole molecule have also been carried out at the Molecular Mechanic and Density Functional Theory approaches. Density Functional Theory results have been associated with Scaled Quantum Mechanics Force Field for fitting between the theoretical and the experimental frequencies.
Collapse
Affiliation(s)
- Y Erdogdu
- Department of Physics, Ahi Evran University, 40040 Kirsehir, Turkey.
| | - S Saglam
- Department of Physics, Gazi University, 06100 Ankara, Turkey
| | - M T Gulluoglu
- Department of Physics, Ahi Evran University, 40040 Kirsehir, Turkey
| |
Collapse
|
13
|
Theoretical analysis (NBO, NPA, Mulliken Population Method) and molecular orbital studies (hardness, chemical potential, electrophilicity and Fukui function analysis) of (E)-2-((4-hydroxy-2-methylphenylimino)methyl)-3-methoxyphenol. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2015.02.076] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
14
|
Bezgin F, Ayaz N, Demirelli K. Synthesis, characterization, and dielectric properties of polymers functionalized with coumarone and diethanolamine. J Appl Polym Sci 2015. [DOI: 10.1002/app.42164] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Feride Bezgin
- Department of Chemistry; Faculty of Arts and Sciences; University of Bitlis Eren; Bitlis Turkey
| | - Nursel Ayaz
- Council of Forensic Medicine; The Ministry of Justice; Malatya 44000 Turkey
| | - Kadir Demirelli
- Department of Chemistry; Faculty of Science; University of Firat; Elaziğ Turkey
| |
Collapse
|
15
|
Senthil kumar J, Jeyavijayan S, Arivazhagan M. Spectroscopic (FT-IR and FT-Raman) investigation, first order hyperpolarizability, NBO, HOMO-LUMO and MEP analysis of 6-nitrochromone by ab initio and density functional theory calculations. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 136 Pt B:771-781. [PMID: 25448928 DOI: 10.1016/j.saa.2014.09.094] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2014] [Revised: 09/17/2014] [Accepted: 09/22/2014] [Indexed: 06/04/2023]
Abstract
The vibrational spectral analysis is carried out using FT-Raman and FT-IR spectroscopy in the range 3500-50 cm(-1) and 4000-400 cm(-1), respectively, for 6-nitrochromone (6NC). The molecular structure, fundamental vibrational frequencies and intensity of the vibrational bands are interpreted with the aid of structure optimization and normal coordinates force field calculation based on ab initio HF and DFT gradient calculations employing the HF/6-311++G(d,p) and B3LYP/6-311++G(d,p) basis set. Stability of the molecule has been analyzed using NBO analysis. The calculated HOMO and LUMO energies show that charge transfer occurs within the molecule. Thermodynamic properties like entropy, heat capacity, zero-point energy and Mulliken's charge analysis have been calculated for the 6NC. The complete assignments were performed on the basis of total energy distribution (TED) of the vibrational modes with scaled quantum mechanical (SQM) method. The MEP map shows the negative potential sites are on oxygen atoms as well as the positive potential sites are around the hydrogen atoms.
Collapse
Affiliation(s)
- J Senthil kumar
- PG & Research Department of Physics, Periyar EVR College, Tiruchirappalli 620 023, India.
| | - S Jeyavijayan
- Department of Physics, JJ College of Engineering and Technology, Tiruchirappalli 620 009, India
| | - M Arivazhagan
- Department of Physics, Government Arts College, Tiruchirappalli 620 022, India
| |
Collapse
|
16
|
Saglam S, Disli A, Erdogdu Y, Marchewka MK, Kanagathara N, Bay B, Güllüoğlu MT. Synthesis, characterization and theoretical studies of 5-(benzylthio)-1-cylopentyl-1H-tetrazole. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 135:1011-1018. [PMID: 25171051 DOI: 10.1016/j.saa.2014.07.071] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Revised: 07/11/2014] [Accepted: 07/28/2014] [Indexed: 06/03/2023]
Abstract
In this study, 5-(benzylthio)-1-cylopentyl-1H-tetrazole (5B1C1HT) have been synthesized. Boiling points of the obtained compound have been determined and it has been characterized by FT-IR, (1)H NMR, (13)C-APT and LC-MS spectroscopy techniques. The FT-IR, (1)H NMR and (13)C-APT spectral measurements of the 5B1C1HT compound and complete assignment of the vibrational bands observed in spectra has been discussed. The spectra were interpreted with the aid of normal coordinate analysis following full structure optimization and force field calculations based on Density Functional Theory (DFT) at 6-311++G(**), cc-pVDZ and cc-pVTZ basis sets. The optimized geometry with 6-311++G(**) basis sets were used to determine the total energy distribution, harmonic vibrational frequencies, IR intensities.
Collapse
Affiliation(s)
- S Saglam
- Department of Physics, Gazi University, Besevler, 06500 Ankara, Turkey
| | - A Disli
- Department of Chemistry, Gazi University, Besevler, 06500 Ankara, Turkey
| | - Y Erdogdu
- Department of Physics, Ahi Evran University, 40040 Kirsehir, Turkey
| | - M K Marchewka
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 937, 50-950 Wroclaw 2, Poland.
| | - N Kanagathara
- Department of Physics, Vel Tech Dr. RR & Dr. SR Technical University, Chennai 600062, India
| | - B Bay
- Department of Chemistry, Gazi University, Besevler, 06500 Ankara, Turkey
| | - M T Güllüoğlu
- Department of Physics, Ahi Evran University, 40040 Kirsehir, Turkey
| |
Collapse
|
17
|
Erdogdu Y, Saglam S. Infrared, Raman and NMR spectra, conformational stability and vibrational assignment of 7,8-Dihydroxy-4-Methylcoumarin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 132:871-878. [PMID: 24935826 DOI: 10.1016/j.saa.2014.04.074] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2013] [Revised: 04/08/2014] [Accepted: 04/17/2014] [Indexed: 06/03/2023]
Abstract
We report a combined some (infrared, Raman and NMR) spectroscopic and quantum chemistry study on 7,8-Dihydroxy-4-Methylcoumarin molecule (78D4MC). The Raman and IR spectra of 78D4MC molecule were recorded and analyzed in the region 3500-50 cm(-1) and 4000-400 cm(-1), respectively. Potential energy scans were performed at the MMFF level of theory. All possible conformers, which are results at the MMFF level theory, were re-computed at the B3LYP functional with cc-pVDZ basis set. The optimized geometrical parameters, harmonic vibrational wavenumbers and NMR chemical shifts of the most stable conformer were calculated at the B3LYP/6-311G(d,p), cc-pVTZ and cc-pVQZ level in the proximity of the isolated molecule. DFT calculations were combined with Pulay's scaled quantum mechanics force field (SQMFF) methodology in order to fit the theoretical wavenumbers to the experimental ones.
Collapse
Affiliation(s)
- Yusuf Erdogdu
- Department of Physics, Ahi Evran University, 40040 Kirsehir, Turkey.
| | - Semran Saglam
- Department of Physics, Gazi University, 06100 Ankara, Turkey
| |
Collapse
|
18
|
Yamini D, Mangalaraj D, Ramakrishnan V. Raman spectroscopic and ab initio studies on the molecular interactions in the binary liquid mixtures of 4'-fluoroacetophenone. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 116:381-388. [PMID: 23973583 DOI: 10.1016/j.saa.2013.07.043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Revised: 07/05/2013] [Accepted: 07/21/2013] [Indexed: 06/02/2023]
Abstract
Raman spectral measurements were carried out for binary liquid mixtures 4'fluoroacetophenone (4F) in different volume concentration ranges at a regular intervals of 0.1 in different solvents. The asymmetric Raman peak observed at 1685 cm(-1) (carbonyl stretching mode) in pure 4F confirms the presence of self association in 4F. The optimization was performed for monomer and dimer structures of 4F as well as 4F dimer with solvents using Gaussian 03 W package. Vibrational wavenumber calculation was performed for monomer and dimer structures of 4F to explain the experimentally observed Raman spectra. The carbonyl stretching mode is the more polar group and its interaction with the solvent molecule plays a vital role in determining the physical and chemical properties of the solute. Hence the observed variation in the peak position and linewidth of carbonyl stretching mode was analysed as a result of intermolecular interactions between the solute and the solvent molecules. Also, interaction energies were calculated to support the results obtained from Raman spectra.
Collapse
Affiliation(s)
- D Yamini
- Department of Laser Studies, School of Physics, Madurai Kamaraj University, Madurai 625 021, India
| | | | | |
Collapse
|
19
|
Karakaş Sarıkaya E, Dereli Ö. Molecular structure and vibrational spectra of 7-Methoxy-4-methylcoumarin by density functional method. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2013.08.024] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
20
|
Karakaş Sarıkaya E, Dereli Ö, Erdoğdu Y, Güllüoğlu M. Molecular structure and vibrational spectra of 7-Ethoxycoumarin by density functional method. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2013.06.026] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|