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Antony Muthu Prabhu A. Spectral and Theoretical Studies of Benzimidazole and 2-Phenyl Substituted Benzimidazoles. BENZIMIDAZOLE 2022. [DOI: 10.5772/intechopen.101966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
This chapter discusses about the spectral and theoretical aspects of selected benzimidazole and 2-phenyl substituted benzimidazole molecules. The synthesis of these benzimidazoles was reported in many methods by the reaction between o-phenylenediamine with formic acid, aromatic aldehydes and N-benzylbezene-1,2-diamine in presence of oxidant tert-butyl hydroperoxide (TBHP). The spectral analysis of these molecules mainly such as UV-visible, fluorescence in solvents will be included in this chapter and discussed about the absorption, fluorescence maximum, conjugation, transition. Further the optimized structure of these molecules will be given using Gaussian 09 W (DFT 6-31G method). And also will be discussed about structural parameters, highest occupied molecular orbital (HOMO) – lowest unoccupied molecular orbital (LUMO) energy energy values, natural bond orbital (NBO), molecular electrostatic potential map (ESP). Many benzimidazole molecules having tautomers in the structure will be explained with the help of theoretical parameters to describe the structural properties.
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Truong DH, Ngo TC, Nhung NTA, Quang DT, Nguyen TLA, Khiri D, Taamalli S, Louis F, El Bakali A, Dao DQ. New insights into the competition between antioxidant activities and pro-oxidant risks of rosmarinic acid. RSC Adv 2022; 12:1499-1514. [PMID: 35425185 PMCID: PMC8978883 DOI: 10.1039/d1ra07599c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 12/11/2021] [Indexed: 12/18/2022] Open
Abstract
Direct and indirect antioxidant activities of rosmarinic acid (RA) based on HOO˙/CH3OO˙ radical scavenging and Fe(iii)/Fe(ii) ion chelation were theoretically studied using density functional theory at the M05-2X/6-311++G(2df,2p) level of theory. First, four antioxidant mechanisms including hydrogen atom transfer (HAT), radical adduct formation (RAF), proton loss (PL) and single electron transfer (SET) were investigated in water and pentyl ethanoate (PEA) phases. Regarding the free radical scavenging mechanism, HAT plays a decisive role with overall rate coefficients of 1.84 × 103 M-1 s-1 (HOO˙) and 4.49 × 103 M-1 s-1 (CH3OO˙) in water. In contrast to PL, RAF and especially SET processes, the HAT reaction in PEA is slightly more favorable than that in water. Second, the [Fe(iii)(H2O)6]3+ and [Fe(ii)(H2O)6]2+ ion chelating processes in an aqueous phase are both favorable and spontaneous especially at the O5, site-1, and site-2 positions with large negative Δr G 0 values and great formation constant K f. Finally, the pro-oxidant risk of RA- was also considered via the Fe(iii)-to-Fe(ii) complex reduction process, which may initiate Fenton-like reactions forming reactive HO˙ radicals. As a result, RA- does not enhance the reduction process when ascorbate anions are present as reducing agents, whereas the pro-oxidant risk becomes remarkable when superoxide anions are found. The results encourage further attempts to verify the speculation using more powerful research implementations of the antioxidant activities of rosmarinic acid in relationship with its possible pro-oxidant risks.
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Affiliation(s)
- Dinh Hieu Truong
- Institute of Research and Development, Duy Tan University Da Nang 550000 Vietnam
- Faculty of Natural Sciences, Duy Tan University Da Nang 550000 Vietnam
| | - Thi Chinh Ngo
- Institute of Research and Development, Duy Tan University Da Nang 550000 Vietnam
- Faculty of Natural Sciences, Duy Tan University Da Nang 550000 Vietnam
| | - Nguyen Thi Ai Nhung
- Department of Chemistry, University of Sciences, Hue University Hue 530000 Vietnam
| | - Duong Tuan Quang
- Department of Chemistry, University of Sciences, Hue University Hue 530000 Vietnam
| | - Thi Le Anh Nguyen
- Institute of Research and Development, Duy Tan University Da Nang 550000 Vietnam
- Faculty of Natural Sciences, Duy Tan University Da Nang 550000 Vietnam
| | - Dorra Khiri
- Department of Chemistry, University of Education, Hue University Hue 530000 Vietnam
| | - Sonia Taamalli
- Department of Chemistry, University of Education, Hue University Hue 530000 Vietnam
| | - Florent Louis
- Department of Chemistry, University of Education, Hue University Hue 530000 Vietnam
| | | | - Duy Quang Dao
- Institute of Research and Development, Duy Tan University Da Nang 550000 Vietnam
- Faculty of Natural Sciences, Duy Tan University Da Nang 550000 Vietnam
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Shkryl Y, Rusapetova T, Yugay Y, Egorova A, Silant’ev V, Grigorchuk V, Karabtsov A, Timofeeva Y, Vasyutkina E, Kudinova O, Ivanov V, Kumeiko V, Bulgakov V. Biosynthesis and Cytotoxic Properties of Ag, Au, and Bimetallic Nanoparticles Synthesized Using Lithospermum erythrorhizon Callus Culture Extract. Int J Mol Sci 2021; 22:9305. [PMID: 34502210 PMCID: PMC8431615 DOI: 10.3390/ijms22179305] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 08/25/2021] [Accepted: 08/26/2021] [Indexed: 12/16/2022] Open
Abstract
The present study reports a green chemistry approach for the rapid and easy biological synthesis of silver (Ag), gold (Au), and bimetallic Ag/Au nanoparticles using the callus extract of Lithospermum erythrorhizon as a reducing and capping agent. The biosynthesized nanoparticles were characterized with ultraviolet-visible (UV-Vis) spectroscopy, X-ray diffraction (XRD) analysis, and transmission electron microscopy (TEM). Our results showed the formation of crystalline metal nanostructures of both spherical and non-spherical shape. Energy dispersive X-ray (EDX) spectroscopy showed the characteristic peaks in the silver and gold regions, confirming the presence of the corresponding elements in the monometallic particles and both elements in the bimetallic particles. Fourier-transform infrared (FTIR) spectroscopy affirmed the role of polysaccharides and polyphenols of the L. erythrorhizon extract as the major reducing and capping agents for metal ions. In addition, our results showed that the polysaccharide sample and the fraction containing secondary metabolites isolated from L. erythrorhizon were both able to produce large amounts of metallic nanoparticles. The biosynthesized nanoparticles demonstrated cytotoxicity against mouse neuroblastoma and embryonic fibroblast cells, which was considerably higher for Ag nanoparticles and for bimetallic Ag/Au nanoparticles containing a higher molar ratio of silver. However, fibroblast migration was not significantly affected by any of the nanoparticles tested. The obtained results provide a new example of the safe biological production of metallic nanoparticles, but further study is required to uncover the mechanism of their toxicity so that the biomedical potency can be assessed.
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Affiliation(s)
- Yury Shkryl
- Federal Scientific Center of the East Asia Terrestrial Biodiversity, Far Eastern Branch of the Russian Academy of Sciences, 690022 Vladivostok, Russia; (T.R.); (Y.Y.); (V.G.); (Y.T.); (E.V.); (O.K.); (V.B.)
| | - Tatiana Rusapetova
- Federal Scientific Center of the East Asia Terrestrial Biodiversity, Far Eastern Branch of the Russian Academy of Sciences, 690022 Vladivostok, Russia; (T.R.); (Y.Y.); (V.G.); (Y.T.); (E.V.); (O.K.); (V.B.)
| | - Yulia Yugay
- Federal Scientific Center of the East Asia Terrestrial Biodiversity, Far Eastern Branch of the Russian Academy of Sciences, 690022 Vladivostok, Russia; (T.R.); (Y.Y.); (V.G.); (Y.T.); (E.V.); (O.K.); (V.B.)
| | - Anna Egorova
- Department of Molecular Diagnostics and Epidemiology, Central Research Institute of Epidemiology, 111123 Moscow, Russia;
| | - Vladimir Silant’ev
- Department of Biomedical Chemistry, Far Eastern Federal University, 690950 Vladivostok, Russia;
- Institute of Chemistry, Far Eastern Branch of the Russian Academy of Sciences, 690022 Vladivostok, Russia
| | - Valeria Grigorchuk
- Federal Scientific Center of the East Asia Terrestrial Biodiversity, Far Eastern Branch of the Russian Academy of Sciences, 690022 Vladivostok, Russia; (T.R.); (Y.Y.); (V.G.); (Y.T.); (E.V.); (O.K.); (V.B.)
| | - Aleksandr Karabtsov
- Far Eastern Geological Institute, Far Eastern Branch of the Russian Academy of Sciences, 690022 Vladivostok, Russia; (A.K.); (V.I.)
| | - Yana Timofeeva
- Federal Scientific Center of the East Asia Terrestrial Biodiversity, Far Eastern Branch of the Russian Academy of Sciences, 690022 Vladivostok, Russia; (T.R.); (Y.Y.); (V.G.); (Y.T.); (E.V.); (O.K.); (V.B.)
| | - Elena Vasyutkina
- Federal Scientific Center of the East Asia Terrestrial Biodiversity, Far Eastern Branch of the Russian Academy of Sciences, 690022 Vladivostok, Russia; (T.R.); (Y.Y.); (V.G.); (Y.T.); (E.V.); (O.K.); (V.B.)
| | - Olesya Kudinova
- Federal Scientific Center of the East Asia Terrestrial Biodiversity, Far Eastern Branch of the Russian Academy of Sciences, 690022 Vladivostok, Russia; (T.R.); (Y.Y.); (V.G.); (Y.T.); (E.V.); (O.K.); (V.B.)
| | - Vladimir Ivanov
- Far Eastern Geological Institute, Far Eastern Branch of the Russian Academy of Sciences, 690022 Vladivostok, Russia; (A.K.); (V.I.)
| | - Vadim Kumeiko
- Department of Medical Biology and Biotechnology, Far Eastern Federal University, 690950 Vladivostok, Russia;
- A.V. Zhirmunsky National Scientific Center of Marine Biology, Far Eastern Branch of the Russian Academy of Sciences, 690041 Vladivostok, Russia
| | - Victor Bulgakov
- Federal Scientific Center of the East Asia Terrestrial Biodiversity, Far Eastern Branch of the Russian Academy of Sciences, 690022 Vladivostok, Russia; (T.R.); (Y.Y.); (V.G.); (Y.T.); (E.V.); (O.K.); (V.B.)
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Adsorption of caffeic acid on chitosan powder. Polym Bull (Berl) 2021. [DOI: 10.1007/s00289-020-03205-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Veras KS, Silveira Fachel FN, Delagustin MG, Teixeira HF, Barcellos T, Henriques AT, Bassani VL, Koester LS. Complexation of rosmarinic acid with hydroxypropyl-β-cyclodextrin and methyl-β-cyclodextrin: Formation of 2:1 complexes with improved antioxidant activity. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.06.026] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Świsłocka R, Regulska E, Karpińska J, Świderski G, Lewandowski W. Molecular Structure and Antioxidant Properties of Alkali Metal Salts of Rosmarinic Acid. Experimental and DFT Studies. Molecules 2019; 24:E2645. [PMID: 31330920 PMCID: PMC6680818 DOI: 10.3390/molecules24142645] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 07/16/2019] [Accepted: 07/17/2019] [Indexed: 12/22/2022] Open
Abstract
The molecular structure of alkali metal rosmarinates was studied in comparison to rosmarinic acid using FT-IR, FT-Raman, 1H and 13C NMR spectroscopy, as well as density functional theory (DFT) calculations. The B3LYP/6-311+G(d,p) method was used to calculate optimized geometrical structures of studied compounds, atomic charges, dipole moments, energies, as well as the wavenumbers and intensities of the bands in vibrational and NMR spectra. Theoretical parameters were compared to experimental data. Antioxidant activity was determined using two spectrophotometric methods: (i) Assessing the ability to scavenge 1,1-diphenyl-2-picrylhydrazyl (DPPH) stable radical and (ii) assay of antioxidant power of ferric ions reducing (FRAP). The linear correlations were found between HOMO-LUMO (highest occupied molecular orbital-lowest unoccupied molecular orbital) energy gap and the reducing power expressed as FRAP (R = 0.77) as well as between IC50 values (the ability of quenching DPPH radicals) and Δνas-s(COO) in IR spectra (differences between asymmetric and symmetric stretching vibrations bands) (R = 0.99). Photochemical properties of studied compounds were also evaluated. The influence of alkali metal on the electronic system of the rosmarinic acid molecule was discussed.
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Affiliation(s)
- Renata Świsłocka
- Department of Chemistry, Biology and Biotechnology, Bialystok University of Technology, Wiejska Street 45E, 15-351 Bialystok, Poland.
| | - Ewa Regulska
- Department of Chemistry, Biology and Biotechnology, Bialystok University of Technology, Wiejska Street 45E, 15-351 Bialystok, Poland
| | - Joanna Karpińska
- Institute of Chemistry, University of Bialystok, Ciolkowskiego Street 1K, 15-245 Bialystok, Poland
| | - Grzegorz Świderski
- Department of Chemistry, Biology and Biotechnology, Bialystok University of Technology, Wiejska Street 45E, 15-351 Bialystok, Poland
| | - Włodzimierz Lewandowski
- Department of Chemistry, Biology and Biotechnology, Bialystok University of Technology, Wiejska Street 45E, 15-351 Bialystok, Poland
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Liudvinaviciute D, Rutkaite R, Bendoraitiene J, Klimaviciute R. Thermogravimetric analysis of caffeic and rosmarinic acid containing chitosan complexes. Carbohydr Polym 2019; 222:115003. [PMID: 31320039 DOI: 10.1016/j.carbpol.2019.115003] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 05/22/2019] [Accepted: 06/17/2019] [Indexed: 12/13/2022]
Abstract
Thermal behaviour and stability of chitosan (CH) and phenolic acids complexes could be of high importance in regard both the practical applications and understanding the complex formation. Thermal degradation of insoluble complexes of CH and caffeic (CACH) or rosmarinic acid (RACH) was investigated in air and nitrogen atmosphere. Thermal decomposition of CACH proceeded in two stages, first of which was attributed to decarboxylation of adsorbed CA in the temperature interval from 150 °C to 200 °C, and second one was related to decomposition of CH backbone at temperatures higher than 200 °C. Thermal degradation of RACH proceeded in one stage at temperatures higher than 200 °C, in the broad temperature range and was related to decomposition of formed complex. Values of apparent activation energy (Ea) related to the second stage of thermal decomposition of CACH and decomposition of RACH at conversion values (α) from 0.1 to 0.8 were determined by using Flynn-Wall-Ozawa method. For CACH the dependence between Ea and α was very similar to that of CH and showed that products of CA thermal degradation formed in the first stage didn't influence the thermal degradation of CACH in the second stage. Meanwhile, for RACH, initially, values of Ea increased with an increase of conversion degree, at certain value of α reached the maximum which depended on the RA to CH molar ratio, and then decreased.
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Affiliation(s)
- Dovile Liudvinaviciute
- Department of Polymer Chemistry and Technology, Kaunas University of Technology, Radvilenu Rd. 19, LT-50254 Kaunas, Lithuania.
| | - Ramune Rutkaite
- Department of Polymer Chemistry and Technology, Kaunas University of Technology, Radvilenu Rd. 19, LT-50254 Kaunas, Lithuania
| | - Joana Bendoraitiene
- Department of Polymer Chemistry and Technology, Kaunas University of Technology, Radvilenu Rd. 19, LT-50254 Kaunas, Lithuania
| | - Rima Klimaviciute
- Department of Polymer Chemistry and Technology, Kaunas University of Technology, Radvilenu Rd. 19, LT-50254 Kaunas, Lithuania
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Liudvinaviciute D, Almonaityte K, Rutkaite R, Bendoraitiene J, Klimaviciute R. Adsorption of rosmarinic acid from aqueous solution on chitosan powder. Int J Biol Macromol 2018; 118:1013-1020. [PMID: 29964108 DOI: 10.1016/j.ijbiomac.2018.06.166] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 06/01/2018] [Accepted: 06/27/2018] [Indexed: 10/28/2022]
Abstract
In present study the adsorption of rosmarinic acid (RA) on chitosan (CH) powder from aqueous solution have been investigated in order to obtain insoluble RA-CH complexes with high amount of RA. The pseudo-second kinetic model and the Langmuir adsorption model described the kinetic and equilibrium adsorption of RA on CH with high correlation coefficients. With the increase of adsorption temperature the rate of adsorption decreased but amount of adsorbed RA increased. It was established that adsorption of RA on CH occurred in two steps, and relevant adsorption mechanism was proposed. The formation of RA-CH with the molar ratio of RA to CH equal to 0.11, 0.22. 0.39, 0.6 and 0.8 was investigated by FT-IR and steady-state fluorescence spectroscopic techniques. By the increase of RA amount in RA-CH complexes the character of both FT-IR and fluorescence spectra changed. The antioxidant activity of RA-CH was investigated by ABTS method and showed that RA-CH having higher amount of adsorbed RA has prolonged antioxidant activity.
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Affiliation(s)
- Dovile Liudvinaviciute
- Department of Polymer Chemistry and Technology, Kaunas University of Technology, Radvilenu Rd. 19, LT-50254 Kaunas, Lithuania
| | - Karolina Almonaityte
- Department of Polymer Chemistry and Technology, Kaunas University of Technology, Radvilenu Rd. 19, LT-50254 Kaunas, Lithuania
| | - Ramune Rutkaite
- Department of Polymer Chemistry and Technology, Kaunas University of Technology, Radvilenu Rd. 19, LT-50254 Kaunas, Lithuania
| | - Joana Bendoraitiene
- Department of Polymer Chemistry and Technology, Kaunas University of Technology, Radvilenu Rd. 19, LT-50254 Kaunas, Lithuania
| | - Rima Klimaviciute
- Department of Polymer Chemistry and Technology, Kaunas University of Technology, Radvilenu Rd. 19, LT-50254 Kaunas, Lithuania.
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Identification of flavanones from Boesenbergia rotunda as potential antioxidants and monoamine oxidase B inhibitors. CHEMICAL PAPERS 2017. [DOI: 10.1007/s11696-017-0241-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Urbaniak A, Kujawski J, Czaja K, Szelag M. Antioxidant properties of several caffeic acid derivatives: A theoretical study. CR CHIM 2017. [DOI: 10.1016/j.crci.2017.08.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Simanaviciute D, Klimaviciute R, Rutkaite R. Equilibrium adsorption of caffeic, chlorogenic and rosmarinic acids on cationic cross-linked starch with quaternary ammonium groups. Int J Biol Macromol 2017; 95:788-795. [PMID: 27932260 DOI: 10.1016/j.ijbiomac.2016.12.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 11/14/2016] [Accepted: 12/04/2016] [Indexed: 11/29/2022]
Abstract
In the present study, the equilibrium adsorption of caffeic acid (CA) and its derivatives, namely, chlorogenic (CGA) and rosmarinic (RA) acids on cationic cross-linked starch (CCS) with degree of substitution of quaternary ammonium groups of 0.42 have been investigated in relation to the structure and acidity of phenolic acids. The Langmuir, Freundlich and Dubinin-Radushkevich adsorption models have been used to describe the equilibrium adsorption of CA, CGA and RA from their initial solutions and solutions having the equimolar amount of NaOH at different temperatures. In the case of adsorption from the initial solutions of acids the values of adsorption parameters were closely related to the dissociation constants of investigated acids. According to the increasing effectiveness of adsorption, phenolic acids could be arranged in the following order: CA
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Affiliation(s)
- Deimante Simanaviciute
- Department of Polymer Chemistry and Technology, Kaunas University of Technology, Radvilenu rd. 19, LT-50254 Kaunas, Lithuania.
| | - Rima Klimaviciute
- Department of Polymer Chemistry and Technology, Kaunas University of Technology, Radvilenu rd. 19, LT-50254 Kaunas, Lithuania
| | - Ramune Rutkaite
- Department of Polymer Chemistry and Technology, Kaunas University of Technology, Radvilenu rd. 19, LT-50254 Kaunas, Lithuania
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Swarnalatha N, Gunasekaran S, Nagarajan M, Srinivasan S, Sankari G, Ramkumaar GR. Vibrational, UV spectra, NBO, first order hyperpolarizability and HOMO-LUMO analysis of carvedilol. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 136 Pt B:567-578. [PMID: 25448957 DOI: 10.1016/j.saa.2014.09.070] [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: 07/31/2014] [Revised: 09/09/2014] [Accepted: 09/18/2014] [Indexed: 06/04/2023]
Abstract
In this work, we have investigated experimentally and theoretically on the molecular structure, vibrational spectra, UV spectral analysis and NBO studies of cardio-protective drug carvedilol. The FT-Raman and FT-IR spectra for carvedilol in the solid phase have been recorded in the region 4000-100 cm(-1) and 4000-400 cm(-1) respectively. Theoretical calculations were performed by using density functional theory (DFT) method at B3LYP/6-31G(d,p) and B3LYP/6-31++G(d,p) basis set levels. The harmonic vibrational frequencies, the optimized geometric parameters have been interpreted and compared with the reported experimental values. The complete vibrational assignments were performed on the basis of potential energy distribution (PED) of the vibrational modes. The thermodynamic properties and molecular electrostatic potential surfaces of the molecule were constructed. The electronic absorption spectrum was recorded in the region 400-200 nm and electronic properties such as HOMO and LUMO energies were calculated. The stability of the molecule arising from hyper conjugative interactions and charge delocalization have been analyzed from natural bond orbital (NBO) analysis. The first order hyperpolarizability of the title molecule was also calculated. The photo stability of carvedilol under different storage conditions were analyzed using UV-Vis spectral technique.
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Affiliation(s)
- N Swarnalatha
- Department of Physics, SCSVMV University, Enathur, Kanchipuram 631561, TN, India.
| | - S Gunasekaran
- Research and Development, St. Peter's Institute of Higher Education and Research, St. Peter's University, Avadi, Chennai 600054, TN, India
| | - M Nagarajan
- Department of Physics, Arulmigu Palani Andavar College of Arts and Culture, Palani 624601, TN, India
| | - S Srinivasan
- PG and Research Department of Physics, Presidency College, Chennai 600005, TN, India
| | - G Sankari
- Department of Physics, Meenakshi College for Women, Chennai 600024, TN, India
| | - G R Ramkumaar
- Department of Physics, C. Kandaswami Naidu College for Men in Anna Nagar East, Chennai 600102, TN, India
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Güder A, Korkmaz H, Gökce H, Alpaslan YB, Alpaslan G. Isolation, characterization, spectroscopic properties and quantum chemical computations of an important phytoalexin resveratrol as antioxidant component from Vitis labrusca L. and their chemical compositions. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 133:378-395. [PMID: 24967544 DOI: 10.1016/j.saa.2014.05.056] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Revised: 05/08/2014] [Accepted: 05/14/2014] [Indexed: 06/03/2023]
Abstract
In this study, isolation and characterization of trans-resveratrol (RES) as an antioxidant compound were carried out from VLE, VLG and VLS. Furthermore, antioxidant activities were evaluated by using six different methods. Finally, total phenolic, flavonoid, ascorbic acid, anthocyanin, lycopene, β-carotene and vitamin E contents were carried out. In addition, the FT-IR, (13)C and (1)H NMR chemical shifts and UV-vis. spectra of trans-resveratrol were experimentally recorded. Quantum chemical computations such as the molecular geometry, vibrational frequencies, UV-vis. spectroscopic parameters, HOMOs-LUMOs energies, molecular electrostatic potential (MEP), natural bond orbitals (NBO) and nonlinear optics (NLO) properties of title molecule have been calculated by using DFT/B3PW91 method with 6-311++G(d,p) basis set in ground state for the first time. The obtained results show that the calculated spectroscopic data are in a good agreement with experimental data.
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Affiliation(s)
- Aytaç Güder
- Vocational High School of Health Services, Department of Medical Services and Techniques, Giresun University, Giresun, Turkey.
| | - Halil Korkmaz
- Faculty of Art and Sciences, Department of Chemistry, Ondokuz Mayis University, Samsun, Turkey
| | - Halil Gökce
- Vocational High School of Health Services, Department of Medical Services and Techniques, Giresun University, Giresun, Turkey
| | | | - Gökhan Alpaslan
- Vocational High School of Health Services, Department of Medical Services and Techniques, Giresun University, Giresun, Turkey
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Saltas D, Pappas CS, Daferera D, Tarantilis PA, Polissiou MG. Direct determination of rosmarinic acid in Lamiaceae herbs using diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and chemometrics. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:3235-41. [PMID: 23496773 DOI: 10.1021/jf305520m] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
For the determination of rosmarinic acid (RA) directly in pulverized plant material, a method is developed using diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) without any physicochemical pretreatment of samples. The RA content of 11 samples of eight different Lamiaceae herbs, as determined by high performance liquid chromatography (HPLC), varied between 86 ± 1 mg/g (in lemon balm) and 12.0 ± 0.8 mg/g (in hyssop) of dried plant material. The 11 samples and 50 other additional samples, which were prepared by mixing initial samples with KBr, were measured using DRIFTS. The second derivative of the spectral region 1344-806 cm(-1) was used and the corresponding data were analyzed using partial least squares (PLS) regression. The correlation between infrared spectral analysis and HPLC measurements shows that the DRIFTS method is sufficiently accurate, simple, and rapid. The RA content of the 11 Lamiaceae samples determined by DRIFTS ranged from 81 ± 4 mg/g (in lemon balm) to 12 ± 3 mg/g (in hyssop) of dried plant material.
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Affiliation(s)
- Dimitrios Saltas
- Department of Science, Agricultural University of Athens, Athens, Greece
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