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Khan A, Agrawal N, Chaudhary R, Yadav A, Pandey J, Narayan A, Ali Abdalrazig Ali S, Tandon P, Vangala VR. Study of chemical reactivity and molecular interactions of the hydrochlorothiazide-4-aminobenzoic acid cocrystal using spectroscopic and quantum chemical approaches. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2025; 324:124960. [PMID: 39180967 DOI: 10.1016/j.saa.2024.124960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Revised: 07/26/2024] [Accepted: 08/09/2024] [Indexed: 08/27/2024]
Abstract
In this study, the molecular, electronic, and chemical properties of the drug hydrochlorothiazide (HCTZ) are determined after cocrystallization with 4-aminobenzoic acid (4-ABA). Analysis has been performed to understand how those variations lead to alteration of physical properties and chemical reactivity in the cocrystal HCTZ-4ABA. IR and Raman characterizations were performed along with quantum chemical calculations. A theoretical investigation of hydrogen bonding interactions in HCTZ-4ABA has been conducted using two functionals: B3LYP and wB97X-D. The results obtained by B3LYP and wB97X-D are compared which leads to the conclusion that B3LYP is the best applied function (density functional theory) to obtain suitable results for spectroscopy. The chemical reactivity descriptors are used to understand various aspects of pharmaceutical properties. Natural bond orbital (NBO) analysis and quantum theory of atoms (QTAIM) are used to analyze nature and strength of hydrogen bonding in HCTZ-4ABA. QTAIM analyzed moderate role of hydrogen bonding interactions in HCTZ-4ABA. The calculated HOMO-LUMO energy gap shows that HCTZ-4ABA is chemically more active than HCTZ drug. These chemical parameters suggest that HCTZ-4ABA is chemically more reactive and softer than HCTZ. The results of this study suggest that cocrystals can be a good alternative for enhancing physicochemical properties of a drug without altering its therapeutic properties.
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Affiliation(s)
- Areeba Khan
- Department of Physics, University of Lucknow, 226007, India
| | - Neelam Agrawal
- Department of Physics, University of Lucknow, 226007, India
| | | | - Arti Yadav
- Department of Physics, University of Lucknow, 226007, India
| | - Jaya Pandey
- Department of Physics, Navyug Kanya Mahavidyalaya, 226004, Lucknow, India
| | - Aditya Narayan
- Centre for Pharmaceutical Engineering Science, School of Pharmacy and Medical Sciences, University of Bradford, Richmond Road, Bradford BD7 1DP, United Kingdom; Department of Chemical Sciences, Indian Institute of Sciences Education and Research (IISER) Kolkata, Nadia, Mohanpur 741246, West Bengal, India
| | - Samar Ali Abdalrazig Ali
- Centre for Pharmaceutical Engineering Science, School of Pharmacy and Medical Sciences, University of Bradford, Richmond Road, Bradford BD7 1DP, United Kingdom
| | - Poonam Tandon
- Department of Physics, University of Lucknow, 226007, India; Deen Dayal Upadhyaya Gorakhpur University, Gorakhpur, Uttar Pradesh, 273009, India.
| | - Venu R Vangala
- Centre for Pharmaceutical Engineering Science, School of Pharmacy and Medical Sciences, University of Bradford, Richmond Road, Bradford BD7 1DP, United Kingdom
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Louis H, Chukwuemeka K, Agwamba EC, Abdullah HY, Pembere AMS. Molecular simulation of Cu, Ag, and Au-decorated Si-doped graphene quantum dots (Si@QD) nanostructured as sensors for SO 2 trapping. J Mol Graph Model 2023; 124:108551. [PMID: 37399776 DOI: 10.1016/j.jmgm.2023.108551] [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: 04/22/2023] [Revised: 06/06/2023] [Accepted: 06/13/2023] [Indexed: 07/05/2023]
Abstract
In view of the numerous environmental hazards and health challenges linked to sulfur (iv) oxide (SO2), an indirect greenhouse gas, and the resultant need to develop efficient gas nanosensor devices, this research had as its principal focus on the theoretical evaluation of the gas sensing potential of metals: Ag, Au and Cu functionalized silicon-doped quantum dots (Si@QD) for the detection and adsorption of SO2 gas investigated using the first-principles density functional theory (DFT) computation at the B3LYP-D3(BJ)/def2-SVP level of theory. Eight (8) possible adsorption modes: SO2_O_Si@QD, SO2_O_Ag_Si@QD, SO2_O_Au_Si@QD, SO2_O_Cu_Si@QD, SO2_S_Si@QD, SO2_S_Ag_Si@QD, SO2_S_Au_Si@QD, and SO2_S_Cu_Si@QD were considered based on SO2 interactions with the studied materials at the -S and -O sites of the SO2 molecule. The counterpoise correction (BSSE) showed that five of the eight interactions had favorable Ead + BSSE values ranging from -0.31 to -1.98 eV. All the eight interactions were observed to be thermodynamically favorable with ΔG and ΔH ranging from -129.01 to -200.24 kcal/mol and -158.26 to -229.73 kcal/mol respectively. Results from the topology analysis reveal that van der Waals forces occurred the greatest at the gas-sensor interphase while SO2_S_ Cu_Si@QD is predicted to have the highest sensing potency based on the conductivity and recovery time estimations. These results confirm the potential efficient feasibility of real-world device application of the metals (Ag, Au, Cu) functionalized Si-doped QDs.
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Affiliation(s)
- Hitler Louis
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria; Department of Pure and Applied Chemistry, University of Calabar, Calabar, Nigeria; Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam, 603103, Tamil Nadu, India.
| | - Kelechi Chukwuemeka
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria; Department of Chemical Sciences, Clifford University, Owerrinta, Nigeria
| | - Ernest C Agwamba
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria; Department of Chemistry, Covenant University, Ota, Nigeria
| | - Hewa Y Abdullah
- Physics Education Department, Tishk International University, Erbil, Iraq
| | - Anthony M S Pembere
- Department of Chemical Sciences, Jaramogi Odinga University of Science and Technology, Bondo, Kenya
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Bakheit AH, Alkahtani HM. Integrated Structural, Functional, and ADMET Analysis of 2-Methoxy-4,6-diphenylnicotinonitrile: The Convergence of X-ray Diffraction, Molecular Docking, Dynamic Simulations, and Advanced Computational Insights. Molecules 2023; 28:6859. [PMID: 37836701 PMCID: PMC10574294 DOI: 10.3390/molecules28196859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 09/21/2023] [Accepted: 09/22/2023] [Indexed: 10/15/2023] Open
Abstract
This study systematically investigates the molecular structure and electronic properties of 2-methoxy-4,6-diphenylnicotinonitrile, employing X-ray diffraction (XRD) and sophisticated computational methodologies. XRD findings validate the compound's orthorhombic crystallization in the P21212 space group, composed of a pyridine core flanked by two phenyl rings. Utilizing the three-dimensional Hirshfeld surface, the research decodes the molecule's spatial attributes, further supported by exhaustive statistical assessments. Key interactions, such as π-π stacking and H⋯X contacts, are spotlighted, underscoring their role in the crystal's inherent stability and characteristics. Energy framework computations and density functional theory (DFT) analyses elucidate the prevailing forces in the crystal and reveal geometric optimization facets and molecular reactivity descriptors. Emphasis is given to the exploration of frontier molecular orbitals (FMOs), aromaticity, and π-π stacking capacities. The research culminates in distinguishing electron density distributions, aromatic nuances, and potential reactivity hotspots, providing a holistic view of the compound's structural and electronic landscape. Concurrently, molecular docking investigates its interaction with the lipoprotein-associated phospholipase A2 protein. Notably, the compound showcases significant interactions with the protein's active site. Molecular dynamics simulations reveal the compound's influence on protein stability and flexibility. Although the molecule exhibits strong inhibitory potential against Lp-PLA2, its drug development prospects face challenges related to solubility and interactions with drug transport proteins.
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Affiliation(s)
- Ahmed H. Bakheit
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia;
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S V N, B S C, Mahesha, K N CP, M K H, N K L. In-silico investigation of 4-nitro-N-1H-pyrazol-3-ylbenzamide towards its potential use against SARS-CoV-2: a DFT, molecular docking and molecular dynamics study. J Biomol Struct Dyn 2023:1-21. [PMID: 37771166 DOI: 10.1080/07391102.2023.2262597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Accepted: 09/17/2023] [Indexed: 09/30/2023]
Abstract
In the present research work, we report the synthesis and characterization of novel pyrazole derivative obtained by the condensation reaction of 4-nitro benzaldehyde group with one equivalent of the 2-amino pyrazole yielding 4-nitro-N-1H-pyrazol-3-ylbenzamide with high yield. The two symmetry-independent molecules (molecule A and molecule B) differ about the central C-N bond, with the dihedral angles between the pyrazole ring system and the nitrobenzene ring being 13.90° and 18.64°, respectively. By optimizing the symmetry-independent dimer molecules, the rotational barrier between the conformers is found to be within the 2.5-5.5 kcal/mol range. QTAIM and RDG based NCI isosurface revealed the presence of strong N-H…N and C-H…O hydrogen bonds which stabilize the two independent centrosymmetric inversion-related dimers. Further, weak and short directional interactions such as C-H…N, H…H and C-H…π were also analyzed systematically using various topological parameters. The compound is found to adhere to the Lipinski's rule of five and exhibit good pharmacokinetic properties. The results of molecular docking studies performed against SARS-CoV-2 virus main protease (PDB IDs: 6LU7, 6W9C and 6WQF) revealed that the compound showed better docking scores. Molecular docking studies verified the inhibition activity of the synthesized novel compound. Finally, the binding free energy and contributed energies were calculated using MM-GBSA method. The 6LU7-ligand complex showed highest binding free energy and among all other interactions, the contributions of the covalent binding and van der Waals energy are found to be significant.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Niranjana S V
- Department of Studies in Physics, University of Mysore, Mysuru, India
- Department of Studies in Physics, Karnataka State Open University, Mysuru, India
| | - Chethan B S
- Department of Studies in Physics, University of Mysore, Mysuru, India
| | - Mahesha
- Department of Studies in Physics, University of Mysore, Mysuru, India
- Department of Physics, SJCE, JSS Science and Technology University, Mysuru, India
| | - Chethan Prathap K N
- Department of Physics, University College of Science, Tumkur University, Tumakuru, India
| | - Hema M K
- Department of Studies in Physics, University of Mysore, Mysuru, India
| | - Lokanath N K
- Department of Studies in Physics, University of Mysore, Mysuru, India
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Palakkeezhillam VNV, Haribabu J, Manakkadan V, Rasin P, Varughese RE, Gayathri D, Bhuvanesh N, Echeverria C, Sreekanth A. Synthesis, spectroscopic characterizations, single crystal X-ray analysis, DFT calculations, in vitro biological evaluation and in silico evaluation studies of thiosemicarbazones based 1,3,4-thiadiazoles. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2022.134309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Yadav A, Chaudhary R, Singh Bahota A, Prajapati P, Pandey J, Narayan A, Tandon P, Vangala VR. Spectroscopic and quantum chemical investigations to explore the effect of intermolecular interactions in a diuretic drug: Hydrochlorothiazide. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 285:121931. [PMID: 36198240 DOI: 10.1016/j.saa.2022.121931] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 09/06/2022] [Accepted: 09/24/2022] [Indexed: 06/16/2023]
Abstract
Hydrochlorothiazide (HCTZ) being a diuretic drug widely used in anti-hypertensive therapy as it lowers the blood pressure by reducing the reabsorption of electrolytes in kidney resulting an increment of urine output and lowering the blood pressure. The purpose of the present work is to study the structural, vibrational and chemical properties of HCTZ based on its monomeric, dimeric and trimeric models by utilizing computational methods and experimental techniques. Density functional theory (DFT) with functional B3LYP and 6-311++G (d, p) basis set was used for a detailed computational study. Monomeric, dimeric and trimeric models of HCTZ have been studied for a better understanding of inter- and intramolecular hydrogen bonding. FT-IR (400-3800 cm-1) and FT-Raman (100-3600 cm-1) spectroscopy have been utilized for the characterization of HCTZ. The shifting in wavenumber of NH2 and OSO group were observed in dimer and trimer due to the formation of intermolecular hydrogen bonding. Quantum theory of atoms in molecules (QTAIM) along with natural bond orbital (NBO) analysis were performed to examine the nature and strength of hydrogen bonding which showed that all the interactions were medium and partially covalent in nature; transition from LP(3)O15 → σ*(H46 → N32) and LP(3)O39 → σ*(H74 → N51) were responsible for the formation of O15•••H46 and O39•••H74 H-bonds, respectively. HOMO-LUMO energies predicted the chemical reactivity and stability of the molecule and the energy gap for dimer (4.6240 eV) and trimer (4.0493 eV) was found to be lesser than the monomer (5.0888 eV) which showed that the dimer and trimer have predicted more chemical reactivity in comparison to monomer. The most electronegative electrostatic potential was observed around the OSO group and the most electropositive potential around the amide group from MEPS analysis. Global as well as local reactivity descriptors have predicted the reactivity and hence, stability of the title molecule.
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Affiliation(s)
- Arti Yadav
- Department of Physics, University of Lucknow, Lucknow 226 007, India
| | - Rajni Chaudhary
- Department of Physics, University of Lucknow, Lucknow 226 007, India
| | | | - Preeti Prajapati
- Department of Physics, University of Lucknow, Lucknow 226 007, India
| | - Jaya Pandey
- Department of Physics, University of Lucknow, Lucknow 226 007, India
| | - Aditya Narayan
- Centre for Pharmaceutical Engineering Science, School of Pharmacy and Medical Sciences, University of Bradford, Richmond Road, Bradford BD7 1DP, United Kingdom
| | - Poonam Tandon
- Department of Physics, University of Lucknow, Lucknow 226 007, India.
| | - Venu R Vangala
- Centre for Pharmaceutical Engineering Science, School of Pharmacy and Medical Sciences, University of Bradford, Richmond Road, Bradford BD7 1DP, United Kingdom
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Luo Y, Wang K, Mu J, Cai Y, Zhu W. Exploring the adsorption behavior of pyrazinamide on the surface of X12Y12(X= B, Al; Y = N, P) nanocages: A in-silico study. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Teka S, Hajji M, Jebnouni A, Messaoudi O, Mansour D, Guerfel T. Non-covalent assembly of β-iminoamine-chlorocobaltate(II) hybrid material: Molecular structure, computational simulations and antimicrobial activity. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131967] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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9
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Prajapati P, Pandey J, Tandon P, Sinha K, Shimpi MR. Molecular Structural, Hydrogen Bonding Interactions, and Chemical Reactivity Studies of Ezetimibe-L-Proline Cocrystal Using Spectroscopic and Quantum Chemical Approach. Front Chem 2022; 10:848014. [PMID: 35242745 PMCID: PMC8885513 DOI: 10.3389/fchem.2022.848014] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Accepted: 01/20/2022] [Indexed: 11/13/2022] Open
Abstract
Ezetimibe (EZT) being an anticholesterol drug is frequently used for the reduction of elevated blood cholesterol levels. With the purpose of improving the physicochemical properties of EZT, in the present study, cocrystals of ezetimibe with L-proline have been studied. Theoretical geometry optimization of EZT-L-proline cocrystal, energies, and structure–activity relationship was carried out at the DFT level of theory using B3LYP functional complemented by 6-311++G(d,p) basis set. To better understand the role of hydrogen bonding, two different models (EZT + L-proline and EZT + 2L-proline) of EZT-L-proline cocrystal were studied. Spectral techniques (FTIR and FT-Raman) combined with quantum chemical methodologies were successfully implemented for the detailed vibrational assignment of fundamental modes. It is a zwitterionic cocrystal hydrogen bonded with the OH group of EZT and the COO− group of L-proline. The existence and strength of hydrogen bonds were examined by a natural bond orbital analysis (NBO) supported by the quantum theory of atoms in molecule (QTAIM). Chemical reactivity was reflected by the HOMO–LUMO analysis. A smaller energy gap in the cocrystal in comparison to API shows that a cocrystal is softer and chemically more reactive. MEPS and Fukui functions revealed the reactive sites of cocrystals. The calculated binding energy of the cocrystal from counterpoise method was −11.44 kcal/mol (EZT + L-proline) and −26.19 kcal/mol (EZT + 2L-proline). The comparative study between EZT-L-proline and EZT suggest that cocrystals can be better used as an alternative to comprehend the effect of hydrogen bonding in biomolecules and enhance the pharmacological properties of active pharmaceutical ingredients (APIs).
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Affiliation(s)
| | - Jaya Pandey
- Department of Physics, University of Lucknow, Lucknow, India
| | - Poonam Tandon
- Department of Physics, University of Lucknow, Lucknow, India
- *Correspondence: Poonam Tandon, ; Manishkumar R. Shimpi,
| | - Kirti Sinha
- Department of Physics, University of Lucknow, Lucknow, India
| | - Manishkumar R. Shimpi
- Chemistry of Interfaces, Luleå University of Technology, Luleå, Sweden
- Department of Materials and Environmental Chemistry, Stockholm University, Stockholm, Sweden
- *Correspondence: Poonam Tandon, ; Manishkumar R. Shimpi,
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Hajji M, Abad N, Habib MA, Elmgirhi SMH, Guerfel T. Computational chemistry methods for modelling non-covalent interactions and chemical reactivity— An overview. J INDIAN CHEM SOC 2021. [DOI: 10.1016/j.jics.2021.100208] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Verma P, Srivastava A, Srivastava K, Tandon P, Shimpi MR. Molecular Structure, Spectral Investigations, Hydrogen Bonding Interactions and Reactivity-Property Relationship of Caffeine-Citric Acid Cocrystal by Experimental and DFT Approach. Front Chem 2021; 9:708538. [PMID: 34381761 PMCID: PMC8350318 DOI: 10.3389/fchem.2021.708538] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 06/21/2021] [Indexed: 11/27/2022] Open
Abstract
The pharmaceutical cocrystal of caffeine-citric acid (CAF-CA, Form II) has been studied to explore the presence of hydrogen bonding interactions and structure-reactivity-property relationship between the two constituents CAF and Citric acid. The cocrystal was prepared by slurry crystallization. Powder X-ray diffraction (PXRD) analysis was done to characterize CAF-CA cocrystal. Also, differential scanning calorimetry (DSC) confirmed the existence of CAF-CA cocrystal. The vibrational spectroscopic (FT-IR and FT-Raman) signatures and quantum chemical approach have been used as a strategy to get insights into structural and spectral features of CAF-CA cocrystal. There was a good correlation among the experimental and theoretical results of dimer of cocrystal, as this model is capable of covering all nearest possible interactions present in the crystal structure of cocrystal. The spectroscopic results confirmed that (O33-H34) mode forms an intramolecular (C25 = O28∙∙∙H34-O33), while (O26-H27) (O39-H40) and (O43-H44) groups form intermolecular hydrogen bonding (O26-H27∙∙∙N24-C22, O39-H40∙∙∙O52 = C51 and O43-H44∙∙∙O86 = C83) in cocrystal due to red shifting and increment in bond length. The quantum theory of atoms in molecules (QTAIM) analysis revealed (O88-H89∙∙∙O41) as strongest intermolecular hydrogen bonding interaction with interaction energy -12.4247 kcal mol-1 in CAF-CA cocrystal. The natural bond orbital analysis of the second-order theory of the Fock matrix highlighted the presence of strong interactions (N∙∙∙H and O∙∙∙H) in cocrystal. The HOMO-LUMO energy gap value shows that the CAF-CA cocrystal is more reactive, less stable and softer than CAF active pharmaceutical ingredients. The electrophilic and nucleophilic reactivities of atomic sites involved in intermolecular hydrogen bond interactions in cocrystal have been demonstrated by mapping electron density isosurfaces over electrostatic potential i.e. plotting molecular electrostatic potential (MESP) map. The molar refractivity value of cocrystal lies within the set range by Lipinski and hence it may be used as orally active form. The results show that the physicochemical properties of CAF-CA cocrystal are enhanced in comparison to CAF (API).
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Affiliation(s)
- Priya Verma
- Department of Physics, University of Lucknow, Lucknow, India
| | | | | | - Poonam Tandon
- Department of Physics, University of Lucknow, Lucknow, India
| | - Manishkumar R. Shimpi
- Department of Materials and Environmental Chemistry, Stockholm University, Stockholm, Sweden
- Chemistry of Interfaces, Luleå University of Technology, Luleå, Sweden
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Spectroscopic and DFT investigations of 8-hydroxy quinoline-5-sulfonic acid-5-chloro-8-hydroxyquinoline cocrystal. CHEMICAL PAPERS 2021. [DOI: 10.1007/s11696-021-01579-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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13
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Enhanced solid-state photoluminescence and fluorescence spectral behaviors for an ESIPT molecule: An experimental and theoretical investigation. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.114176] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Nakhli A, Bergaoui M, Toumi K, Khalfaoui M, Benguerba Y, Balsamo M, Soetaredjo FE, Ismadji S, Ernst B, Erto A. Molecular insights through computational modeling of methylene blue adsorption onto low-cost adsorbents derived from natural materials: A multi-model's approach. Comput Chem Eng 2020. [DOI: 10.1016/j.compchemeng.2020.106965] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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15
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Belkhiria M, Hajji M, Mechria A, Cruz TF, Gomes CS, Gomes PT, Guerfel T, Msaddek M. Synthesis and structural studies of hexafluorophosphate-based organic salts: A combined experimental and computational analysis. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2019.127337] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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16
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Li F, Zhang G, Xia S, Yu L. Host-guest interactions accompanying the cationic nitrogen heterocyclic guests encapsulation within pillar[5]arene: A theoretical research. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.07.109] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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17
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Khan E, Shukla A, Jhariya AN, Tandon P, Vangala VR. Nitrofurantoin-melamine monohydrate (cocrystal hydrate): Probing the role of H-bonding on the structure and properties using quantum chemical calculations and vibrational spectroscopy. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 221:117170. [PMID: 31158769 DOI: 10.1016/j.saa.2019.117170] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 04/30/2019] [Accepted: 05/26/2019] [Indexed: 06/09/2023]
Abstract
Cocrystal monohydrate of nitrofurantoin (NF) with melamine (MELA) has been studied as NF is an antibacterial drug used for the treatment of urinary tract infections. The structure of nitrofurantoin-melamine-monohydrate (NF-MELA-H2O) is characterized by FT-IR and FT-Raman spectroscopy. The energies and vibrational frequencies of the optimized structures calculated using quantum chemical calculations. Supported by normal coordinate analyses and potential energy distributions (PEDs), the complete vibrational assignments recommended for the observed fundamentals of cocrystal hydrate. With the aim of inclusion of all the H-bond interactions, dimer of NF-MELA-H2O has been studied as only two molecules of cocrystal hydrate are present in the unit cell. By the study of dimeric model consistent assignment of the FT-IR and FT-Raman spectrum obtained. H-bonds are of essential importance in an extensive range of molecular sciences. The vibrational analyses depict existence of H-bonding (O-H⋯N) between water O-H and pyridyl N atom of MELA in both monomer and dimer. To probe the strength and nature of H-bonding in monomer and dimer, topological parameters such as electron density (ρBCP), Laplacian of electron density (∇2ρBCP), total electron energy density (HBCP) and H-bond energy (EHB) at bond critical points (BCP) are evaluated by quantum theory of atoms in molecules (QTAIM). Natural bond orbitals (NBOs) analyses are carried out to study especially the intra and intermolecular H-bonding and their second order stabilization energy (E(2)). The value of HOMO-LUMO energy band gap for NF-MELA-H2O (monomer and dimer both) is less than NF, showing more chemical reactivity for NF-MELA-H2O. Chemical reactivity has been described with the assistance of electronic descriptors. Global electrophilicity index (ω = 7.3992 eV) shows that NF-MELA-H2O behaves as a strong electrophile than NF. The local reactivity descriptors analyses such as Fukui functions, local softnesses and electrophilicity indices performed to determine the reactive sites within NF-MELA-H2O. In MEP map of NF-MELA (monomer and dimer) electronegative regions are about NO2 and C=O group of NF, although the electropositive regions are around NH2, N-H group and H2O molecule. Molar refractivity (MR) value of NF-MELA-H2O (monomer and dimer) lies within the range set by Lipinski's modified rules. This study could set as an example to study the H-bond interactions in pharmaceutical cocrystals.
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Affiliation(s)
- Eram Khan
- Department of Physics, University of Lucknow, Lucknow 226 007, Uttar Pradesh, India
| | - Anuradha Shukla
- Department of Physics, University of Lucknow, Lucknow 226 007, Uttar Pradesh, India
| | - Aditya N Jhariya
- Centre for Pharmaceutical Engineering Science and School of Pharmacy and Medical Sciences, University of Bradford, Bradford, West Yorkshire BD7 1DP, United Kingdom
| | - Poonam Tandon
- Department of Physics, University of Lucknow, Lucknow 226 007, Uttar Pradesh, India.
| | - Venu R Vangala
- Centre for Pharmaceutical Engineering Science and School of Pharmacy and Medical Sciences, University of Bradford, Bradford, West Yorkshire BD7 1DP, United Kingdom.
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Structural and Reactivity Analyses of Nitrofurantoin–4-dimethylaminopyridine Salt Using Spectroscopic and Density Functional Theory Calculations. CRYSTALS 2019. [DOI: 10.3390/cryst9080413] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Pharmaceutical salt, nitrofurantoin–4-dimethylaminopyridine (NF-DMAP), along with its native components NF and DMAP are scrutinized by FT-IR and FT-Raman spectroscopy along with density functional theory so that an insight into the H-bond patterns in the respective crystalline lattices can be gained. Two different functionals, B3LYP and wB97X-D, have been used to compare the theoretical results. The FT-IR spectra obtained for NF-DMAP and NF clearly validate the presence of C33–H34⋅⋅⋅O4 and N23–H24⋅⋅⋅N9 hydrogen bonds by shifting in the stretching vibration of –NH and –CH group of DMAP+ towards the lower wavenumber side. To explore the significance of hydrogen bonding, quantum theory of atoms in molecules (QTAIM) has been employed, and the findings suggest that the N23–H24⋅⋅⋅N9 bond is a strong intermolecular hydrogen bond. The decrement in the HOMO-LUMO gap, which is calculated from NF → NF-DMAP, reveals that the active pharmaceutical ingredient is chemically less reactive compared to the salt. The electrophilicity index (ω) profiles for NF and DMAP confirms that NF is acting as electron acceptor while DMAP acts as electron donor. The reactive sites of the salt are plotted by molecular electrostatic potential (MEP) surface and calculated using local reactivity descriptors.
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Chadar D, Lande DN, Gejji SP, Nikalje MD, Chakravarty D, Salunke-Gawali S. Trimerization of Vitamin K3: Molecular structure and density functional theoretic investigations. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.03.082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Srivastava K, Tandon P, Sinha K, Srivastava A, Wang J. Study of molecular structure and hydrogen bond interactions in dipfluzine-benzoic acid (DIP-BEN) cocrystal using spectroscopic and quantum chemical method. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 216:7-14. [PMID: 30865873 DOI: 10.1016/j.saa.2019.01.092] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Revised: 01/14/2019] [Accepted: 01/16/2019] [Indexed: 06/09/2023]
Abstract
The purpose of this article is to predict the molecular structure of the cocrystal of dipfluzine-benzoic acid (DIP-BEN) through computational approach (DFT calculations) and validate it using vibrational spectroscopic studies. The molecular structure of the DIP-BEN cocrystal has been predicted by forming models on the basis of the active sites available to form H-bonds between dipfluzine (DIP) and benzoic acid (BEN). Conformational study has been performed and potential energy surface scans are plotted around the flexible bonds of the cocrystal molecule and three stable conformers have been obtained. Quantum theory of atoms in molecules (QTAIM) explains that all the interactions are medium and partially covalent in nature. Natural bond orbital analysis of the second order perturbation theory of the Fock matrix suggests that interactions LP (2) O2 → σ*(O74H75) and LP (2) F1 → σ* (O89H90) are responsible for the stabilization of the molecule. The HOMO and LUMO energies and electronic charge transfer (ECT) confirms that charge flows from BEN to DIP. Global reactivity descriptor parameters suggest that DIP-BEN cocrystal is softer, thus more reactive in comparison to DIP. Local reactivity descriptor parameter is used to predict reactive sites of the cocrystal. The experimental and theoretical results support the formation of cocrystal through strong hydrogen bond (O89H90⋯F1 and O74H75⋯O2) interactions present in cocrystal.
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Affiliation(s)
| | - Poonam Tandon
- Physics Department, University of Lucknow, Lucknow 226 007, India.
| | - Kirti Sinha
- Physics Department, University of Lucknow, Lucknow 226 007, India
| | | | - Jing Wang
- School of Pharmaceutical Sciences, Hebei Medical University, Shijiazhuang 050017, China
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Long L, Tao P, Li T, Wu S, Kong X, Liao L, Xiao X, Nie C. Insight into Coordination of Uranyl Ions with N,N′‐bis(2‐five‐membered heterocyclidene)‐1,8‐anthradiamines. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.4931] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Li‐yu Long
- School of Chemistry and Chemical EngineeringUniversity of South China Hengyang China 421001
- Key Laboratory of Hunan Province for Design and Application of Natural Actinide Complexes Hengyang China 421001
| | - Peng Tao
- School of Chemistry and Chemical EngineeringUniversity of South China Hengyang China 421001
- Key Laboratory of Hunan Province for Design and Application of Natural Actinide Complexes Hengyang China 421001
| | - Tian‐liang Li
- School of Chemistry and Chemical EngineeringUniversity of South China Hengyang China 421001
| | - Si Wu
- School of Chemistry and Chemical EngineeringUniversity of South China Hengyang China 421001
| | - Xiang‐he Kong
- School of Chemistry and Chemical EngineeringUniversity of South China Hengyang China 421001
| | - Li‐fu Liao
- School of Chemistry and Chemical EngineeringUniversity of South China Hengyang China 421001
- Key Laboratory of Hunan Province for Design and Application of Natural Actinide Complexes Hengyang China 421001
| | - Xi‐lin Xiao
- School of Chemistry and Chemical EngineeringUniversity of South China Hengyang China 421001
- Key Laboratory of Hunan Province for Design and Application of Natural Actinide Complexes Hengyang China 421001
| | - Chang‐ming Nie
- School of Chemistry and Chemical EngineeringUniversity of South China Hengyang China 421001
- Key Laboratory of Hunan Province for Design and Application of Natural Actinide Complexes Hengyang China 421001
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Shweta, Khan E, Prajapati P, Tandon P, Bharti P, Kumar P, Maurya R. Structural reactivity analyses of a neoflavonoid 4-methoxydalbergione using vibrational spectroscopy and quantum chemical calculations. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2018.07.075] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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23
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Shukla A, Khan E, Alsirawan MHDB, Mandal R, Tandon P, Vangala VR. Spectroscopic (FT-IR, FT-Raman, and 13C SS-NMR) and quantum chemical investigations to provide structural insights into nitrofurantoin–4-hydroxybenzoic acid cocrystals. NEW J CHEM 2019. [DOI: 10.1039/c8nj05946b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Non-covalent interactions contribute considerably to the stability of cocrystals and have appreciable effects on their molecular geometry as well.
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Affiliation(s)
- Anuradha Shukla
- Department of Physics
- University of Lucknow
- Lucknow 226007
- India
| | - Eram Khan
- Department of Physics
- University of Lucknow
- Lucknow 226007
- India
| | - MHD. Bashir Alsirawan
- Centre for Pharmaceutical Engineering Science
- School of Pharmacy and Medical Sciences
- University of Bradford
- Bradford BD7 1DP
- UK
| | - Rajorshi Mandal
- Department of Chemistry
- Indian Institute of Technology
- Kharagpur 721302
- India
| | - Poonam Tandon
- Department of Physics
- University of Lucknow
- Lucknow 226007
- India
| | - Venu R. Vangala
- Centre for Pharmaceutical Engineering Science
- School of Pharmacy and Medical Sciences
- University of Bradford
- Bradford BD7 1DP
- UK
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Verma P, Srivastava A, Shukla A, Tandon P, Shimpi MR. Vibrational spectra, hydrogen bonding interactions and chemical reactivity analysis of nicotinamide–citric acid cocrystals by an experimental and theoretical approach. NEW J CHEM 2019. [DOI: 10.1039/c9nj03085a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The hydrogen bond interactions in the cocrystal lead to spatial arrangements enhancing the physicochemical properties.
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Affiliation(s)
- Priya Verma
- Department of Physics
- University of Lucknow
- Lucknow 226 007
- India
| | | | - Anuradha Shukla
- Department of Physics
- University of Lucknow
- Lucknow 226 007
- India
| | - Poonam Tandon
- Department of Physics
- University of Lucknow
- Lucknow 226 007
- India
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Pandey J, Prajapati P, Srivastava A, Tandon P, Sinha K, Ayala AP, Bansal AK. Spectroscopic and molecular structure (monomeric and dimeric model) investigation of Febuxostat: A combined experimental and theoretical study. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 203:1-12. [PMID: 29852375 DOI: 10.1016/j.saa.2018.05.074] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Accepted: 05/20/2018] [Indexed: 06/08/2023]
Abstract
Febuxostat (FXT) is a urate-lowering drug and xanthine oxidase inhibitor which is used for the treatment of hyperuricemia and gout caused by increased levels of uric acid in the blood (hyperuricemia). The present study aims to provide deeper knowledge of the structural, vibrational spectroscopic and physiochemical properties of FXT based on monomeric and dimeric model with the aid of combination of experimental and computational methods. The conformational analysis of form Q has been done to predict the possible structure of unknown form A. Vibrational spectra of form A and Q has been compared to get an idea of hydrogen bonding interactions of form A. A computational study of FXT has been executed at different level (B3LYP, M06-2X, WB97XD) of theory and 6-31 G (d, p) basis set for dimeric model to elucidate the nature of intermolecular hydrogen bond. The red shift observed in the stretching modes of OH, CO groups and blue shift in stretching mode of CN group in experimental as well as in theoretical spectra explains the involvement of these groups in intermolecular hydrogen bonding. NBO analysis shows that change in electron density (ED) in the lone pair orbital to σ* antibonding orbital (LP1 (N39) → σ* (O3-H38)) with maximum value of E(2) energy confirms the presence of hydrogen bond (N39⋯H38-O3) leading to dimer formation. Study of topological parameters was executed for dimer using Bader's atoms in molecules (AIM) theory predicting the partially covalent nature of hydrogen bonds present in the molecule. The study of molecular electrostatic potential surface (MEPS) map ascertains that the CO, CN group are prone to electrophilic attack and OH group is active towards nucleophilic attack. The lower energy band gap and higher value of softness of dimeric model of FXT indicates its more reactivity, polarisability than monomeric model. The local reactivity descriptors predict the order of reactive sites towards electrophilic, nucleophilic and radical attack. An investigation made to determine the ligand protein interaction of FXT through docking with different molecular targets reveals the inhibitive as well as antibacterial nature of FXT.
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Affiliation(s)
- Jaya Pandey
- Department of Physics, University of Lucknow, Lucknow 226007, India
| | - Preeti Prajapati
- Department of Physics, University of Lucknow, Lucknow 226007, India
| | | | - Poonam Tandon
- Department of Physics, University of Lucknow, Lucknow 226007, India.
| | - Kirti Sinha
- Department of Physics, University of Lucknow, Lucknow 226007, India
| | - Alejandro P Ayala
- Departamento de Fisica, Universidade Federal do Ceará, C.P. 6030, 60.455-900 Fortaleza, CE, Brazil
| | - Arvind K Bansal
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Sector-67, S.A.S. Nagar, Punjab 160062, India
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Ren X, An M. Theoretical and experimental studies of the influence of gold ions and DMH on cyanide-free gold electrodeposition. RSC Adv 2018; 8:2667-2677. [PMID: 35541452 PMCID: PMC9077390 DOI: 10.1039/c7ra13115a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Accepted: 01/02/2018] [Indexed: 12/23/2022] Open
Abstract
Quantum chemical calculations based on density functional theory (DFT) were employed to determine an appropriate gold source for gold electroplating and to ascertain the stable structures of gold-complexes in cyanide-free electrolyte. Based on the charge distribution of 5,5-dimethylhydantoin (DMH) and the bonding energy of gold complexes, Au3+ is the appropriate gold source for DMH-based gold electroplating electrolyte to get greater cathodic polarization and [Au(DMH)4]− with 2N(4)–Au coordination structure is the most stable form of gold ion in the electrolyte. The influence of DMH, used as the complexing agent, on electrochemical behaviors was investigated using cathodic polarization, cyclic voltammetry, and chronoamperometry measurements. With DMH as the complexing agent, the cathodic polarization of gold electrodeposition was significantly enhanced. DMH concentration was determined as 0.30 mol L−1 based on the investigation of the influence of the DMH concentration on cathodic polarization and gold electrodeposit micromorphology. The kinetic features based on cyclic voltammogram measurements revealed that the electrodeposition was an irreversible process under diffusion control with 0.30 mol L−1 DMH as the complexing agent. The ion and electron transfers were obviously inhibited by DMH. The gold electrodeposition process displayed progressive nucleation according to the Scharifker and Hills nucleation model with various applied potentials. The growth rate of the crystal nucleus was reduced by DMH and promoted by a negative shift of Eap. Au3+ is the appropriate gold source for the DMH-based gold electroplating electrolyte to get greater cathodic polarization.![]()
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Affiliation(s)
- Xuefeng Ren
- School of Food and Environment
- Dalian University of Technology
- Panjin
- China
| | - Maozhong An
- State Key Laboratory of Urban Water Resource and Environment
- School of Chemistry and Chemical Engineering
- Harbin Institute of Technology
- Harbin
- China
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Sarmah KK, Rajbongshi T, Bhowmick S, Thakuria R. First-line antituberculosis drug, pyrazinamide, its pharmaceutically relevant cocrystals and a salt. ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE CRYSTAL ENGINEERING AND MATERIALS 2017; 73:1007-1016. [DOI: 10.1107/s2052520617011477] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Accepted: 08/04/2017] [Indexed: 11/10/2022]
Abstract
A few pyrazinamide (Pyz) cocrystals involving hydroxybenzoic/cinnamic acid derivatives [2,4-dihydroxybenzoic acid (24DHBA); 2,6-dihydroxybenzoic acid (26DHBA); 3,5-dihydroxybenzoic acid (35DHBA) and nutraceutical molecule ferulic acid (FRA)] and the first example of a molecular salt with p-toluenesulfonic acid (pTSA) have been prepared and characterized using various solid-state techniques. A high-temperature cocrystal polymorph of Pyz·FRA has been characterized from the endothermic peaks observed using differential scanning calorimetry. The presence of substituent groups carrying hydrogen bond donors or acceptors and their influence on supramolecular synthon formation has been investigated using a Cambridge Structural Database search. Equilibrium solubility of all the binary complexes of Pyz follows the order of their coformer solubility, i.e. Pyz+·pTSA− > Pyz·35DHBA > Pyz > Pyz·26DHBA > Pyz·24DHBA > Pyz·FRA. A twofold enhancement in solubility of Pyz+·pTSA− molecular salt compared with the parent drug suggests a potential drug formulation for the treatment of tuberculosis.
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Khan E, Shukla A, Jadav N, Telford R, Ayala AP, Tandon P, Vangala VR. Study of molecular structure, chemical reactivity and H-bonding interactions in the cocrystal of nitrofurantoin with urea. NEW J CHEM 2017. [DOI: 10.1039/c7nj01345k] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The cocrystal of nitrofurantoin with urea (C8H6N4O5)·(CH4N2O), a non-ionic supramolecular complex, has been studied.
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Affiliation(s)
- E. Khan
- Department of Physics
- University of Lucknow
- Lucknow 226 007
- India
| | - A. Shukla
- Department of Physics
- University of Lucknow
- Lucknow 226 007
- India
| | - N. Jadav
- Centre for Pharmaceutical Engineering Science and School of Pharmacy and Medical Sciences
- University of Bradford
- Bradford
- UK
| | - R. Telford
- School of Chemistry and Biosciences
- University of Bradford
- Bradford
- UK
| | - A. P. Ayala
- Departamento de Física
- Universidade Federal do Ceará
- Fortaleza
- Brazil
| | - P. Tandon
- Department of Physics
- University of Lucknow
- Lucknow 226 007
- India
| | - V. R. Vangala
- Centre for Pharmaceutical Engineering Science and School of Pharmacy and Medical Sciences
- University of Bradford
- Bradford
- UK
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