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Mullin A, Scott M, Vaccaro G, Gittins R, Ferla S, Schifano F, Guirguis A. Handheld Raman Spectroscopy in the First UK Home Office Licensed Pharmacist-Led Community Drug Checking Service. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:4793. [PMID: 36981705 PMCID: PMC10049009 DOI: 10.3390/ijerph20064793] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 03/03/2023] [Accepted: 03/06/2023] [Indexed: 06/18/2023]
Abstract
Across the world, the interest in point-of-care drug checking as a harm-reduction intervention is growing. This is an attempt to improve intelligence about current drug trends and reduce drug-related morbidity and mortality. In the UK, drug-related harm is increasing exponentially year after year. As such, specialist community treatment services are exploring new methods to improve engagement with people who use drugs (PWUD), who may require support for their problematic drug use. This need has driven the requirement to pilot an on-site, time-responsive, readily available drug-checking service at point-of-support centres. In this study, we piloted the UK's first Home Office-licensed drug-checking service that was embedded into a community substance-misuse service and had all on-site analysis and harm-reduction interventions led and delivered by pharmacists. We report on the laboratory findings from the associated confirmatory analysis (UHPLC-MS, GC-MS, and 1H NMR) to assess the performance of the on-site hand-held Raman spectrometer and outline the challenges of providing real-time analysis of psychoactive substances in a clinical setting. Whilst acknowledging the limitation of the small sample size (n = 13), we demonstrate the potential suitability of using this technology for the purposes of screening substances in community-treatment services. Portability of equipment and timeliness of results are important and only very small samples may be provided by people who use the service. The challenges of accurately identifying substances from complex mixtures were equally found with both point-of-care Raman spectroscopy and laboratory confirmatory-analysis techniques. Further studies are required to confirm these findings.
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Affiliation(s)
- Anthony Mullin
- Department of Clinical, Pharmaceutical and Biological Science, School of Life and Medical Sciences, University of Hertfordshire, Hatfield AL10 9AB, UK
| | - Mark Scott
- Department of Clinical, Pharmaceutical and Biological Science, School of Life and Medical Sciences, University of Hertfordshire, Hatfield AL10 9AB, UK
| | - Giorgia Vaccaro
- Department of Clinical, Pharmaceutical and Biological Science, School of Life and Medical Sciences, University of Hertfordshire, Hatfield AL10 9AB, UK
| | - Rosalind Gittins
- Clinical Department, WDP-Westminster Drug Project, 18 Dartmouth St., London SW1H 9BL, UK
| | - Salvatore Ferla
- Pharmacy, Medical School, The Grove Extension, Swansea University, Swansea SA2 8PP, UK
| | - Fabrizio Schifano
- Department of Clinical, Pharmaceutical and Biological Science, School of Life and Medical Sciences, University of Hertfordshire, Hatfield AL10 9AB, UK
| | - Amira Guirguis
- Department of Clinical, Pharmaceutical and Biological Science, School of Life and Medical Sciences, University of Hertfordshire, Hatfield AL10 9AB, UK
- Pharmacy, Medical School, The Grove Extension, Swansea University, Swansea SA2 8PP, UK
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2
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Integrated Spectroscopic, Bio-active Prediction and Analytics of Isoquinoline Derivative for Breast Cancer Mitigation. CHEMISTRY AFRICA 2022. [DOI: 10.1007/s42250-022-00479-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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3
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Exploring the antibacterial activity of 1, 2 diaminoethane hexanedionic acid by spectroscopic, electronic, ELF, LOL, RDG analysis and molecular docking studies using DFT method. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131388] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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4
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Suvitha A, El-Mansy MAM, Kothandan G, Steephen A. MOLECULAR STRUCTURE, FT-RAMAN, IR, NLO, NBO, HOMO–LUMO ANALYSIS, PHYSICOCHEMICAL DESCRIPTORS, ADME PARAMETERS, AND PHARMACOKINETIC BIOACTIVITY OF 2,3,5,6-TETRACHLORO-p-BENZOQUINONE. J STRUCT CHEM+ 2021. [DOI: 10.1134/s0022476621090031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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5
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Kimani MM, Lanzarotta A, Batson JS. Rapid determination of eight benzodiazepines in suspected counterfeit pharmaceuticals using surface-enhanced Raman scattering with handheld Raman spectrometers. J Forensic Sci 2021; 66:2167-2179. [PMID: 34318500 DOI: 10.1111/1556-4029.14797] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 06/03/2021] [Accepted: 06/25/2021] [Indexed: 11/27/2022]
Abstract
The excessive prescription of benzodiazepines is putting more people at risk of dependence on these drugs and is exacerbating the fatal overdose toll of opioids. A rapid and sensitive SERS method has been developed for trace detection of select benzodiazepines in low-dosage suspect counterfeit tablets, capsules, and injectable solutions using two different portable handheld Raman spectrometers equipped with either a 785-nm laser or a 1064-nm laser. A total of 169 samples and blanks were examined using five handheld Raman spectrometers, which provided data set of 729 examinations. The extraction/SERS procedures yielded true positive rates above 90% for alprazolam, diazepam, and midazolam using the 1064-nm device and yielded true positive rates above 95% for alprazolam, clonazepam, diazepam, estazolam, midazolam, and temazepam using the 785-nm device; however, the extraction/SERS procedures yielded true positive rates below 60% for lorazepam and triazolam. The minimum concentration (Cmin ) of the benzodiazepine standards that reproducibly yielded a positive match ranged from 1 to 10 μg/ml using the 1064-nm laser device and from 0.5 to 50 μg/ml using the 785-nm laser device. For the analysis of authentic and suspect counterfeit tablets containing these benzodiazepines, the measured Cmin ranged between 10 and 15 µg per tablet or capsule for 1064-nm laser device and 1-100 µg per tablet or capsule for 785-nm laser device. The developed methods are simple, rapid, and ideal for screening suspect benzodiazepine-containing pharmaceutical products at satellite laboratories located within or near international mail facilities and express courier hubs.
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Affiliation(s)
- Martin M Kimani
- US Food and Drug Administration, Forensic Chemistry Center, Cincinnati, OH, USA
| | - Adam Lanzarotta
- US Food and Drug Administration, Forensic Chemistry Center, Cincinnati, OH, USA
| | - JaCinta S Batson
- US Food and Drug Administration, Forensic Chemistry Center, Cincinnati, OH, USA
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6
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Anju L, Aruldhas D, Joe IH. Spectroscopic, charge transfer interaction and docking studies of gardona insecticide. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129557] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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7
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Synthesis and characterization of Cd (L-Proline)2 complex using vibrational spectroscopy and quantum chemical calculation. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.128972] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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8
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Hannah Clara T, Muthu S, Christian Prasana J. Quantum mechanical, spectroscopic and docking studies of (2E)-1-(4-aminophenyl)-3-(4-benzyloxyphenyl)-prop-2-en-1-one Chalcone derivative by density functional theory - A prospective respiratory drug. ACTA ACUST UNITED AC 2020; 50:2816-2825. [PMID: 33173755 PMCID: PMC7643630 DOI: 10.1016/j.matpr.2020.08.804] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 08/06/2020] [Accepted: 08/20/2020] [Indexed: 11/29/2022]
Abstract
Theoretical investigations on the molecular geometry, vibrational and electronic environment of (2E)-1-(4-aminophenyl)-3-(4-benzyloxyphenyl)-prop-2-en-1-one (APBPP) are presented for the first time. The vibration frequencies simulated were thoroughly analysed employing DFT/B3LYP using 6-311++G(d,p) basis set and compared with experimental FT- Raman and FT- IR data which showed good agreement vice-versa. Optimised molecular equilibrium geometry of the title compound was carried out. Vibrational assignments of wave numbers with PED (potential energy distribution) was done using VEDA software and the quantum chemical calculations of the molecular geometry were scaled using quantum mechanics. The title molecule showcased excellent results on HOMO - LUMO energies, NMR chemical shifts, 3.73 eV band gap, electronegativity (χ), chemical potential (μ), softness (S), global hardness (η). The low softness value (0.261) and thehigh value of electrophilicity index (4.0323) explains the biological activity of the title molecule. The reactive sites of APBPP were thoroughly investigated by Mulliken charges, MEP (Molecular electrostatic Potential) and Fukui functions. Thermo dynamical environment of the title compound for different temperatures were studied which reveals the correlations between entropy (S), heat capacity (C) and enthalpy changes (H) with temperatures. The title compound was docked into the reactive sites of antiviral (SARS-CoV-1,2) and anticancer protein using molecular docking tool and it showed excellent results compared to the ongoing clinical trials. The paper explains the experimental analysis which are in line with the quantum calculations and presents an optimistic evidence via Molecular docking studies. The synthesized compound against various panels of microorganism projects its ability to be the most potential drug to treat various pathologies in pharmacy Industry.
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Affiliation(s)
- T Hannah Clara
- Department of Physics, Madras Christian College, Chennai 59, India.,University of Madras, Chennai 600005, India
| | - S Muthu
- Department of Physics, Aringnar Anna Government Arts College, Chennai 604 407, India
| | - Johanan Christian Prasana
- Department of Physics, Madras Christian College, Chennai 59, India.,University of Madras, Chennai 600005, India
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Biedulska M, Królicka A, Lipińska AD, Krychowiak-Maśnicka M, Pierański M, Grabowska K, Nidzworski D. Physicochemical profile of Os (III) complexes with pyrazine derivatives: From solution behavior to DNA binding studies and biological assay. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113804] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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10
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Borah B, Devi TG. Characterization of Zn (l-Proline)2 complex using spectroscopic techniques and DFT analysis. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.128022] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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11
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Kuruvilla TK, Muthu S, Prasana JC, George J, Sara Saji R, Geoffrey B, Host Antony David R. Molecular docking, spectroscopic studies on 4-[2-(Dipropylamino) ethyl]-1,3-dihydro-2H-indol-2-one and QSAR study of a group of dopamine agonists by density functional method. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 222:117185. [PMID: 31177005 DOI: 10.1016/j.saa.2019.117185] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Revised: 05/02/2019] [Accepted: 05/26/2019] [Indexed: 06/09/2023]
Abstract
Density functional theory is one of the most popular accepted computational quantum mechanical techniques used in the analysis of molecular structure and vibrational spectra. Experimental and theoretical investigations of the molecular structure, electronic and vibrational characteristics of 4-[2-(Dipropylamino) ethyl]-1,3-dihydro-2H-indol-2-one are presented in this work. The title compound was characterized using FT-IR, FT-Raman and UV-Vis spectroscopic techniques. The results were compared with the theoretical calculations obtained using DFT/B3LYP with 6-311++G(d,p) as basis sets and was found to be in good agreement. The complete optimization of the molecular geometry of the title compound was carried out. Further, the vibrational assignments and calculation of potential energy distribution (PED) were reported. NLO has emerged as a key factor in recent researches. Materials showing nonlinear optical properties form the basis of nonlinear optics and development of such materials plays an important role in the present scenario. The current work provides sufficient justification for the title compound to be selected as a good non-linear optical (NLO) candidate. The electronic properties were reported using TD-DFT approach. The HOMO (EHOMO = -5.96 eV), LUMO (ELUMO = -0.80 eV) energies, energy gap and electrophilicity (2.22) was calculated in order to understand the stability, reactivity and bioactivity of the compound under investigation. To comprehend the bonding interactions we have performed the total (TDOS), partial (PDOS) and overlap population or COOP (Crystal Orbital Overlap Population) density of states. The drug likeness values were analyzed to evaluate the potential of the title compound to be an active pharmaceutical component. As a positive proof the paper further explains the molecular docking studies of the said compound. In addition, the stereochemistry of the protein structure was checked using Ramachandran plot. The title compound is a directly acting dopamine D2 agonist. In order to establish relationship between molecular descriptors of compound and its biological activity, QSAR studies have been done within the framework of DFT for 10 dopamine agonist including the title compound. Hence, the research exploration provides requisite information pertaining to the geometry, stability, reactivity and bioactivity of the compound through spectroscopic and quantum chemical methods.
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Affiliation(s)
- Tintu K Kuruvilla
- Department of Physics, Madras Christian College, East Tambaram 600059, Tamil Nadu, India
| | - S Muthu
- Department of Physics, Arignar Anna Govt. Arts College, Cheyyar 604407, Tamil Nadu, India.
| | | | - Jacob George
- Department of Physics, Madras Christian College, East Tambaram 600059, Tamil Nadu, India
| | - Rinnu Sara Saji
- Department of Physics, Madras Christian College, East Tambaram 600059, Tamil Nadu, India
| | - Ben Geoffrey
- Department of Physics, Madras Christian College, East Tambaram 600059, Tamil Nadu, India
| | - R Host Antony David
- Bioinformatics Infrastructure Facility for BITSnet, Madras Christian College, East Tambaram 600059, Tamil Nadu, India
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12
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Spectroscopic (FT-IR, FT-Raman), quantum mechanical and docking studies on methyl[(3S)-3-(naphthalen-1-yloxy)-3-(thiophen-2-yl)propyl]amine. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2018.07.097] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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13
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Characterization of Self-Emulsifying Drug Delivery Systems Using In Situ Raman Spectroscopy to Study the Precipitation Inhibition Mechanism of Poorly Water-Soluble Drugs. J Pharm Innov 2018. [DOI: 10.1007/s12247-018-9315-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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14
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Borah MM, Devi TG. Vibrational study and Natural Bond Orbital analysis of serotonin in monomer and dimer states by density functional theory. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.02.055] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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15
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Perez HA, Bustos AY, Taranto MP, Frías MDLA, Ledesma AE. Effects of Lysozyme on the Activity of Ionic of Fluoroquinolone Species. Molecules 2018; 23:E741. [PMID: 29570644 PMCID: PMC6017444 DOI: 10.3390/molecules23040741] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2018] [Revised: 03/16/2018] [Accepted: 03/21/2018] [Indexed: 01/10/2023] Open
Abstract
Fluoroquinolones (FQs) constitute an important class of biologically active broad-spectrum antibacterial drugs that are which are in contact with many biological fluids under different acidity conditions. We studied the reactivity of ciprofloxacin (Cpx) and levofloxacin (Lev) and their interaction with lysozyme (Lyz) at different pH values, using UV-visible absorption, fluorescence, infrared spectroscopies supported by DFT calculation and docking. In addition, by antimicrobial assays, the biological consequences of the interaction were evaluated. DFT calculation predicted that the FQ cationic species present at acid pH have lower stabilization energies, with an electric charge rearrangement because of their interactions with solvent molecules. NBO and frontier orbital calculations evidenced the role of two charged centers, NH₂⁺ and COO-, for interactions by electronic delocalization effects. Both FQs bind to Lyz via a static quenching with a higher interaction in neutral medium. The interaction induces a structural rearrangement in β-sheet content while in basic pH a protective effect against the denaturation of Lyz was inferred. The analysis of thermodynamic parameters and docking showed that hydrophobic, electrostatic forces and hydrogen bond are the responsible of Cpx-Lyz and Lev-Lyz associations. Antimicrobial assays evidenced an antagonist effect of Lyz in acid medium while in neutral medium the FQs' activities were not modified by Lyz.
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Affiliation(s)
- Hugo Alejandro Perez
- Departamento de Química, Facultad de Ciencias Exactas y Tecnologías, Universidad Nacional de Santiago del Estero-CONICET, Av. Belgrano (S) No. 1912, 4200 Santiago del Estero, Argentina.
- Laboratorio de Biointerfases y Sistemas Biomimeticos, Centro de Investigación en Biofísica Aplicada y Alimentos (CIBAAL), Universidad Nacional de Santiago del Estero-CONICET, RN 9, Km 1125, 4206 Santiago del Estero, Argentina.
| | - Ana Yanina Bustos
- Centro de Investigación en Biofísica, Aplicada y Alimentos (CIBAAL), Universidad Nacional de Santiago del Estero-CONICET, RN 9, Km 1125, 4206 Santiago del Estero, Argentina.
- Facultad de Ciencias Médicas, Universidad Nacional de Santiago del Estero-CONICET, Av. Belgrano (S) No. 1912, 4200 Santiago del Estero, Argentina.
| | - María Pía Taranto
- Centro de Referencia para Lactobacilos (CERELA-CONICET), Chacabuco 145, 4000 San Miguel de Tucumán, Argentina.
| | - María de Los Angeles Frías
- Laboratorio de Biointerfases y Sistemas Biomimeticos, Centro de Investigación en Biofísica Aplicada y Alimentos (CIBAAL), Universidad Nacional de Santiago del Estero-CONICET, RN 9, Km 1125, 4206 Santiago del Estero, Argentina.
| | - Ana Estela Ledesma
- Departamento de Química, Facultad de Ciencias Exactas y Tecnologías, Universidad Nacional de Santiago del Estero-CONICET, Av. Belgrano (S) No. 1912, 4200 Santiago del Estero, Argentina.
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Sevvanthi S, Muthu S, Raja M. Quantum mechanical, spectroscopic studies and molecular docking analysis on 5,5-diphenylimidazolidine-2,4-dione. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.08.015] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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17
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Borah MM, Devi TG. Vibrational studies of Thyroxine hormone: Comparative study with quantum chemical calculations. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.07.063] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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18
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Abraham CS, Prasana JC, Muthu S. Quantum mechanical, spectroscopic and docking studies of 2-Amino-3-bromo-5-nitropyridine by Density Functional Method. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 181:153-163. [PMID: 28359904 DOI: 10.1016/j.saa.2017.03.045] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Revised: 03/10/2017] [Accepted: 03/17/2017] [Indexed: 06/07/2023]
Abstract
Experimental and theoretical investigations on the molecular structure, electronic and vibrational characteristics of 2-Amino-3-bromo-5-nitropyridine are presented. The vibrational frequencies were obtained by DFT/B3LYP calculations employing 6-311++G (d, p) basis set. This was compared with experimental FT-IR and FT-Raman spectral data. Simulated FT-IR (4000-400cm-1) and FT-Raman spectra (4000-100cm-1) showed good agreement with the observed spectra. The molecular equilibrium geometry of the title compound was fully optimized. Quantum chemical calculations of the equilibrium geometry and the complete vibrational assignments of wavenumbers using potential energy distribution (PED) were calculated with scaled quantum mechanics. HOMO-LUMO energies, energy gap (ΔE), electronegativity (χ), chemical potential (μ), global hardness (η), softness (S) and the Fukui function were calculated for the title molecule. The title compound has a low softness value (0.239) and the calculated value of electrophilicity index (5.905) describes the biological activity. The stability and charge delocalization of the title molecule were studied by Natural Bond Orbital (NBO) analysis, Non-Linear Optical (NLO) behaviour in terms of first order hyperpolarizability, dipole moment and anisotropy of polarizability and Molecular Electrostatic Potential (MEP) were accounted. The computed values of μ, α and β for the title molecule are 1.851 Debye, 1.723×10-23esu and 7.428×10-30esu respectively. The high β value and non-zero value of μ indicate that the title compound might be a good candidate for NLO material. Thermodynamic properties of the title molecule were studied for different temperatures thereby revealing the correlations between heat capacity (C), entropy (S) and enthalpy changes (H) with temperatures. Docking studies of the title compound were scrutinized to predict the preferred binding orientation, affinity and activity of the given compound. The title compound was docked into the active site of the protein 5FCT which belongs to the class of proteins exhibiting the property as a Dihydrofolate synthase inhibitor. A minimum binding energy of -5.9kcal/mol and intermolecular energy of -6.5kcal/mol is seen in the interaction.
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Affiliation(s)
| | | | - S Muthu
- Department of Physics, Arignar Anna Government Arts College, Cheyyar 604407, Tamil Nadu, India.
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Fahid F, Kanaani A, Pourmousavi SA, Ajloo D. Synthesis, tautomeric stability, spectroscopy and computational study of a potential molecular switch of (Z)-4-(phenylamino)pent-3-en-2-one. Mol Phys 2017. [DOI: 10.1080/00268976.2017.1287439] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Farzaneh Fahid
- School of Chemistry, Damghan University, Damghan, 3671641167, Iran
| | - Ayoub Kanaani
- School of Chemistry, Damghan University, Damghan, 3671641167, Iran
| | - Seied Ali Pourmousavi
- School of Chemistry, Damghan University, Damghan, 3671641167, Iran
- Institute of Biological Sciences, Damghan University, Damghan, 3671641167, Iran
| | - Davood Ajloo
- School of Chemistry, Damghan University, Damghan, 3671641167, Iran
- Institute of Biological Sciences, Damghan University, Damghan, 3671641167, Iran
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20
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Molecular structural investigation of adenosine using spectroscopic and quantum computational calculations. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2016.04.096] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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21
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Chylewska A, Sikorski A, Ogryzek M, Makowski M. Attractive S⋯π and π-π interactions in the pyrazine-2-thiocarboxamide structure: Experimental and computational studies in the context of crystal engineering and microbiological properties. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2015.10.032] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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22
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Synthesis, spectroscopic investigations and computational study of monomeric and dimeric structures of 2-methyl-4-quinolinol. RESEARCH ON CHEMICAL INTERMEDIATES 2015. [DOI: 10.1007/s11164-015-2084-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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23
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Mathammal R, Monisha NR, Yasaswini S, Krishnakumar V. Molecular structure, vibrational analysis (FT-IR, FT-Raman), NMR, UV, NBO and HOMO-LUMO analysis of N,N-Diphenyl Formamide based on DFT calculations. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 139:521-532. [PMID: 25579654 DOI: 10.1016/j.saa.2014.11.057] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2014] [Revised: 10/18/2014] [Accepted: 11/20/2014] [Indexed: 06/04/2023]
Abstract
In this work, the vibrational spectral analysis is carried out by using Raman and infrared spectroscopy in the range 4000-400 cm(-1) and 4000-50 cm(-1) respectively for N,N-Diphenyl Formamide (DPF) molecule. The optimized molecular structures, vibrational frequencies and corresponding vibrational assignments, nuclear magnetic resonance (NMR) and ultraviolet-visible (UV-VIS) spectra of the title molecule are evaluated using density functional theory (DFT) with standard B3LYP/6-31G(d,p) basis set. The harmonic vibrational frequencies are calculated and the scaled values have been compared with experimental FT-IR and FT-Raman spectra. The observed and calculated frequencies are found to be in good agreement. The stability of the molecule arising from hyper conjugative interactions and the charge delocalization has been analyzed using natural bond (NBO) analysis. The possible electronic transitions are determined by HOMO-LUMO orbital shapes and their energies. Thermodynamic properties (heat capacity, entropy and enthalpy) and the first hyperpolarizability of the title compound are calculated. The Mulliken charges and electric dipole moment of the molecule are computed using DFT calculations. The (1)H and (13)C nuclear magnetic resonance (NMR) chemical shift of the molecules are calculated by the gauge independent atomic orbital (GIAO) method and compared with experimental results.
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Affiliation(s)
- R Mathammal
- Department of Physics, Sri Sarada College for Women (Autonomous), Salem, 16 Tamil Nadu, India.
| | - N R Monisha
- Department of Physics, Sri Sarada College for Women (Autonomous), Salem, 16 Tamil Nadu, India
| | - S Yasaswini
- Department of Physics, Sri Sarada College for Women (Autonomous), Salem, 16 Tamil Nadu, India
| | - V Krishnakumar
- Department of Physics, Periyar University, Salem, 16 Tamil Nadu, India
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Suvitha A, Periandy S, Govindarajan M, Gayathri P. Vibrational analysis using FT-IR, FT-Raman spectra and HF-DFT methods and NBO, NLO, NMR, HOMO-LUMO, UV and electronic transitions studies on 2,2,4-trimethyl pentane. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 138:900-912. [PMID: 25459692 DOI: 10.1016/j.saa.2014.10.031] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Revised: 07/21/2014] [Accepted: 10/13/2014] [Indexed: 06/04/2023]
Abstract
In this work, the vibrational spectral analysis was carried out by using Raman and infrared spectroscopy in the range 100-4000cm(-1)and 50-4000cm(-1), respectively, for 2,2,4-Trimethyl Pentane, TMP (C8H18) molecule. The molecular structure, fundamental vibrational frequencies and intensity of the vibrational bands are interpreted with the aid of structure optimizations and geometrical parameter calculations based on Hartree Fock (HF) and density functional theory (DFT) method with 6-311++G(d,p) basis set. The scaled B3LYP/6-311++G(d,p) results shows the best agreement with the experimental values over the other method. The calculated HOMO and LUMO energies shows that charge transfer within the molecule. The physical reactions of single bond hydrocarbon TMP were investigated. The results of the calculations were applied to simulate spectra of the title compound, which shows the excellent agreement with observed spectra. Besides, Mulliken atomic charges, UV, frontier molecular orbital (FMO), MEP, NLO activity, Natural Bond-Orbital (NBO) analysis, NMR and thermodynamic properties of title molecule were also performed.
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Affiliation(s)
- A Suvitha
- Periyar Maniyammai University, Vallam, Thanjavur, India; St. Francies College, Bangalore, India.
| | - S Periandy
- Department of Physics, Tagore Arts College, Puducherry, India
| | - M Govindarajan
- Department of Physics, Bharathidasan Govt. College for Women, Puducherry, India
| | - P Gayathri
- Department of Physics, Periyar Maniyammai University, Vallam, Thanjavur, India
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Moriyama K, Furuno N, Yamakawa N. Crystal face identification by Raman microscopy for assessment of crystal habit of a drug. Int J Pharm 2015; 480:101-6. [PMID: 25615983 DOI: 10.1016/j.ijpharm.2015.01.031] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2014] [Revised: 12/16/2014] [Accepted: 01/18/2015] [Indexed: 11/17/2022]
Abstract
Crystal habit is one of the key crystallographic characteristics of active pharmaceutical ingredients (APIs), especially those that are poorly soluble. X-ray powder diffraction has commonly been used to assess crystal habit; however, it can only provide macro-information regarding crystal habit for a whole powder sample, not for individual crystals. We describe an approach that uses Raman microscopy for the identification of crystal faces to assess crystal habit at the individual particle level. An antiepileptic agent, phenytoin, was used as the model substance. Phenytoin crystals form a primitive orthorhombic cell. Raman microscopy was used to identify three different patterns of Raman spectra, corresponding to the crystallographic axis that was parallel to the polarization direction of the excitation laser. Thus, a combination of Raman spectra, in which the polarization direction was horizontal and vertical to the morphologically long axis of the crystal, characterized the crystal face. Phenytoin crystals were prepared under various conditions, and the horizontal/vertical combinations of Raman spectra were recorded for individual crystals. The dominantly exposed crystal faces for each condition were identified. This analytical method enables micro-view assessments of crystal habit, which are helpful for identifying the habits of APIs alone and in formulations.
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Affiliation(s)
- Kei Moriyama
- Shujitsu University, School of Pharmacy, 1-6-1 Nishigawara, Naka-ku, Okayama 703-8516, Japan.
| | - Naoko Furuno
- Shujitsu University, School of Pharmacy, 1-6-1 Nishigawara, Naka-ku, Okayama 703-8516, Japan
| | - Naoki Yamakawa
- Shujitsu University, School of Pharmacy, 1-6-1 Nishigawara, Naka-ku, Okayama 703-8516, Japan
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26
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Uma Maheswari J, Muthu S, Sundius T. QM/MM methodology, docking and spectroscopic (FT-IR/FT-Raman, NMR, UV) and Fukui function analysis on adrenergic agonist. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 137:841-855. [PMID: 25277632 DOI: 10.1016/j.saa.2014.07.095] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Revised: 07/09/2014] [Accepted: 07/29/2014] [Indexed: 06/03/2023]
Abstract
The Fourier transform infrared, FT-Raman, UV and NMR spectra of Ternelin have been recorded and analyzed. Harmonic vibrational frequencies have been investigated with the help of HF with 6-31G (d,p) and B3LYP with 6-31G (d,p) and LANL2DZ basis sets. The (1)H and (13)C nuclear magnetic resonance (NMR) chemical shifts of the molecule were calculated by GIAO method. The polarizability (α) and the first hyperpolarizability (β) values of the investigated molecule have been computed using DFT quantum mechanical calculations. Stability of the molecule arising from hyper conjugative interactions, and charge delocalization has been analyzed using natural bond orbital (NBO) analysis. The electron density-based local reactivity descriptors such as Fukui functions were calculated to explain the chemical selectivity or reactivity site in Ternelin. Finally the calculated results were compared to simulated infrared and Raman spectra of the title compound which show good agreement with observed spectra. Molecular docking studies have been carried out in the active site of Ternelin and reactivity with ONIOM was also investigated.
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Affiliation(s)
- J Uma Maheswari
- Department of Physics, Sree Sastha Institute of Engg and Technology, Chembarabakkam, Chennai, Tamil Nadu, India.
| | - S Muthu
- Department of Physics, Sri Venkateswara College of Engineering, Pennalur, Tamil Nadu, India
| | - Tom Sundius
- Department of Physics, University of Helsinki, P.O. Box 64, FIN-00014 Helsinki, Finland
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27
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Suvitha A, Periandy S, Boomadevi S, Govindarajan M. Vibrational frequency analysis, FT-IR, FT-Raman, ab initio, HF and DFT studies, NBO, HOMO-LUMO and electronic structure calculations on pycolinaldehyde oxime. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 117:216-224. [PMID: 23994677 DOI: 10.1016/j.saa.2013.07.080] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Revised: 07/07/2013] [Accepted: 07/21/2013] [Indexed: 06/02/2023]
Abstract
In this work, the vibrational spectral analysis is carried out by using Raman and infrared spectroscopy in the range 100-4000 cm(-1)and 50-4000 cm(-1), respectively, for pycolinaldehyde oxime (PAO) (C6H6N2O) molecule. The vibrational frequencies have been calculated and scaled values are compared with experimental FT-IR and FT-Raman spectra. The structure optimizations and normal coordinate force field calculations are based on HF and B3LYP methods with 6-311++G(d,p) basis set. The results of the calculation shows excellent agreement between experimental and calculated frequencies in B3LYP/6-311++G(d,p) basis set. The optimized geometric parameters are compared with experimental values of PAO. The non linear optical properties, NBO analysis, thermodynamics properties and mulliken charges of the title molecule are also calculated and interpreted. A study on the electronic properties, such as HOMO and LUMO energies, are performed by time-dependent DFT (TD-DFT) approach. Besides, frontier molecular orbitals (FMO), molecular electrostatic potential (MEP) are performed. The effects due to the substitutions of CH=NOH ring are investigated. The (1)H and (13)C nuclear magnetic resonance (NMR) chemical shifts of the molecule are calculated by the gauge independent atomic orbital (GIAO) method and compared with experimental results.
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Affiliation(s)
- A Suvitha
- Periyar Maniyammai University, Vallam, Thanjavur, India; St. Francies College, Bangalore, India.
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28
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Muthu S, Uma Maheswari J, Sundius T. Quantum mechanical, spectroscopic studies (FT-IR, FT-Raman, NMR, UV) and normal coordinates analysis on 3-([2-(diaminomethyleneamino) thiazol-4-yl] methylthio)-N'-sulfamoylpropanimidamide. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 108:307-318. [PMID: 23507526 DOI: 10.1016/j.saa.2013.02.022] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2012] [Revised: 02/02/2013] [Accepted: 02/07/2013] [Indexed: 06/01/2023]
Abstract
Famotidine (3-([2-(diaminomethyleneamino) thiazol-4-yl] methylthio)-N'-sulfamoylpropanimidamide) is a histamine H2-receptor antagonist that inhibits stomach acid production, and it is commonly used in the treatment of peptic ulcer disease (PUD) and gastroesophageal reflux disease (GERD/GORD). Quantum chemical calculations of the equilibrium geometry of famotidine in the ground state were carried out using density functional theory (DFT/B3LYP) with the 6-311G(d,p) basis set. In addition, harmonic vibrational frequencies, infrared intensities and Raman activities were calculated at the same level of theory. A detailed interpretation of the infrared and Raman spectrum of the drug is also reported. Theoretical simulations of the FT-IR, and FT-Raman spectra of the title compound have been calculated. Good correlations between the experimental (1)H and (13)C NMR chemical shifts and calculated GIAO shielding tensors were found. The results of the energy and oscillator strength calculations by time-dependent density functional theory (TD-DFT) supplement the experimental findings. Total and partial density of state (TDOS and PDOS) and also overlap population density of state (COOP or OPDOS) diagrams analysis were presented. The dipole moment, linear polarizability and first order hyperpolarizability values were also computed. The linear polarizability and first order hyperpolarizabilities of the studied molecule indicate that the compound is a good candidate for nonlinear optical materials.
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Affiliation(s)
- S Muthu
- Department of Physics, Sri Venkateswara College of Engineering, Pennalur, Tamil Nadu, India
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29
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Balachandran V, Parimala K. Molecular structures, FT-IR and FT-Raman spectra, NBO analysis, NLO properties, reactive sites and quantum chemical calculations of keto-enol tautomerism (2-amino-4-pyrimidinol and 2-amino-pyrimidine-4(1H)-one). SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 102:30-51. [PMID: 23220518 DOI: 10.1016/j.saa.2012.10.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2012] [Revised: 10/02/2012] [Accepted: 10/10/2012] [Indexed: 06/01/2023]
Abstract
The keto-enol tautomerism of 2-amino-4-pyrimidinol (APN) and 2-amino-pyrimidine-4(1H)-one (APO) are investigated by vibrational spectroscopy and quantum chemical method. FT-IR and FT-Raman spectra are recorded in the regions of 4000-400 cm(-1) and 3500-100 cm(-1), respectively for APN. Geometrical parameters, vibrational wavenumbers of APN and APO are predicted by density functional theory (DFT) employing B3LYP level with 6-311++G(d,p) and 6-311++G(2d,p) basis sets. The non-linear optical (NLO) properties of the title molecules are computed. The molecular electrostatic potential (MEP) surface maps are plotted and explained in detail. Natural bond orbital (NBO) analyses have been performed on APN molecule. The significant changes in occupancies and the energies of bonding and antibonding orbital have been explained in detail. Thermodynamic properties (heat capacities, entropies, and enthalpy) and their correlations with temperatures are also obtained from the calculated frequencies of the optimized structures. Reactivity descriptors, Fukui functions and electrophilic sites are found and discussed.
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Affiliation(s)
- V Balachandran
- PG and Research Department of Physics, A.A. Government Arts College, Musiri, Tiruchirappalli 620 211, India.
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Vibrational Spectroscopy Investigation Using Ab Initio and Density Functional Theory Analysis on the Structure of tert-Butyl 3a-Chloroperhydro-2,6a-epoxyoxireno[ e]isoindole-5-carboxylate. J CHEM-NY 2013. [DOI: 10.1155/2013/124659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The molecular structure, vibrational frequencies, and infrared intensities of thetert-butyl 3a-chloroperhydro-2,6a-epoxyoxireno[e]isoindole-5-carboxylate were calculated by the HF and DFT (BLYP and B3LYP) methods using 6-31G(d) and 6-31G(d,p) basis sets. The FT infrared spectrum of the solid sample was measured under standard condition. We obtained two stable conformers for the title compound; however Conformer 1 is approximately 0.2 kcal/mol more stable than the Conformer 2. The comparison of the theoretical and experimental geometry of the title compound shows that the X-ray parameters fairly well reproduce the geometry of Conformer 2. Comparison of the observed fundamental vibrational frequencies of the title molecule and calculated results by HF and DFT methods indicates that B3LYP is superior for molecular vibrational problems. The harmonic vibrations computed by the B3LYP/6-31G(d,p) method are in a good agreement with the observed IR spectral data. Theoretical vibrational spectra of the title compound were interpreted by means of potential energy distributions (PEDs) using VEDA 4 program.
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31
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Zhang R, Li X, Zhang X. Molecular structure and vibrational spectra of phenobaraitone by density functional theory and ab initio hartree-Fock calculations. ACTA ACUST UNITED AC 2011. [DOI: 10.1007/s11458-011-0255-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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32
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Güllüoğlu M, Erdogdu Y, Karpagam J, Sundaraganesan N, Yurdakul Ş. DFT, FT-Raman, FT-IR and FT-NMR studies of 4-phenylimidazole. J Mol Struct 2011. [DOI: 10.1016/j.molstruc.2011.01.001] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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33
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A hybrid method for estimation of molecular dynamics of diazepam-density functional theory combined with NMR and FT-IR spectroscopy. Int J Pharm 2011; 404:19-26. [DOI: 10.1016/j.ijpharm.2010.10.044] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2010] [Revised: 10/25/2010] [Accepted: 10/26/2010] [Indexed: 11/23/2022]
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34
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Jagannathan L, Meenakshi R, Gunasekaran S, Srinivasan S. FT-IR, FT-Raman and UV–vis spectra and quantum chemical investigation of carvedilol. MOLECULAR SIMULATION 2010. [DOI: 10.1080/08927020903313998] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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35
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Puszyńska-Tuszkanow M, Daszkiewicz M, Maciejewska G, Adach A, Cieślak-Golonka M. Interaction of hydantoins with transition metal ions: synthesis, structural, spectroscopic, thermal and magnetic properties of [M(H2O)4(phenytoinate)2] M = Ni(II), Co(II). Struct Chem 2009. [DOI: 10.1007/s11224-009-9533-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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36
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Ali HRH, Edwards HGM, Kendrick J, Scowen IJ. Vibrational spectroscopic study of terbutaline hemisulphate. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2009; 72:715-719. [PMID: 19124270 DOI: 10.1016/j.saa.2008.11.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2008] [Accepted: 11/08/2008] [Indexed: 05/27/2023]
Abstract
The Raman spectrum of terbutaline hemisulphate is reported for the first time, and molecular assignments are proposed on the basis of ab initio BLYP DFT calculations with a 6-31G* basis set and vibrational frequencies predicted within the quasi-harmonic approximation; these predictions compare favourably with the observed vibrational spectra. Comparison with previously published infrared data explains several spectral features. The results from this study provide data that can be used for the preparative process monitoring of terbutaline hemisulphate, an important beta(2) agonist drug in various dosage forms and its interaction with excipients and other components.
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Affiliation(s)
- H R H Ali
- Chemical & Forensic Sciences/University Analytical Centre, University of Bradford, UK
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37
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Arslan H, Demircan A. Structure and vibrational frequencies of 6-chloro-8-thia-1,4-epoxybicyclo[4.3.0]non-2-ene: density functional theory study. MOLECULAR SIMULATION 2008. [DOI: 10.1080/08927020701632862] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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38
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The Molecular Structure and Vibrational Spectrum of 6-bromo-8-thia-1,4-epoxybicyclo[4.3.0]non-2-ene. Int J Mol Sci 2007. [DOI: 10.3390/i8111064] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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