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Chimatahalli Shanthakumar K, Sridhara PG, Rajabathar JR, Al-lohedan HA, Lokanath NK, Mylnahalli Krishnegowda H. Unveiling a Novel Solvatomorphism of Anti-inflammatory Flufenamic Acid: X-ray Structure, Quantum Chemical, and In Silico Studies. ACS OMEGA 2024; 9:20753-20772. [PMID: 38764648 PMCID: PMC11097344 DOI: 10.1021/acsomega.3c07520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 04/10/2024] [Accepted: 04/16/2024] [Indexed: 05/21/2024]
Abstract
This paper delves into the polymorphism of 2-[3-(trifluoromethyl)anilino]benzoic acid, commonly referred to as flufenamic acid (FA), a pharmaceutical agent employed in treating inflammatory conditions. The central focus of the study is on a newly unearthed solvatomorphic structure of FA in methanol (FAM), and a thorough comparison is conducted with the commercially available standard structure. Employing a comprehensive approach, including X-ray crystallography, Hirshfeld surface analysis, density functional theory (DFT), molecular docking, and molecular dynamics (MD) simulations, the research aims to unravel the structural and functional implications of solvatomorphism. The X-ray crystal structure analysis brings to light notable differences between the standard FA and solvatomorphic FAM, showcasing variations in intermolecular interactions and crystal packing. Key features such as hydrogen bonding, π···π stacking, and C-H···π interactions are identified as influential factors shaping the stability and conformation of the compounds. Hirshfeld surface analysis further quantifies the nature and contribution of intermolecular interactions, providing a comprehensive perspective on molecular stability. Density functional theory offers valuable electronic structure insights, highlighting disparities in frontier molecular orbitals between FA and FAM. Molecular docking studies against prostaglandin D2 11-ketoreductase explore potential drug interactions, unveiling distinct binding modes and hydrogen bonding patterns that shed light on how the solvatomorphic structure may impact drug-target interactions. In-depth molecular dynamics simulations over 100 ns investigate the stability of the protein-ligand complex, with root mean square deviation and root mean square fluctuation analyses revealing minimal deviations and affirming the stability of FAM within the active site of the target protein.
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Affiliation(s)
| | | | - Jothi Ramalingam Rajabathar
- Department
of Chemistry, College of Science, King Saud
University, P.O. Box. 2455, Riyadh 11451, Kingdom of Saudi Arabia
| | - Hamad A. Al-lohedan
- Department
of Chemistry, College of Science, King Saud
University, P.O. Box. 2455, Riyadh 11451, Kingdom of Saudi Arabia
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Wang Q, Dai W, Dai Y, Pan M, Liu Y, Zhang L, Zheng J, Liu X, Li R, Ma L, Wang H, Zong Y. Design Synthesis of Low-Silica SAPO-34 Nanocrystals by Constructing Isomorphous Core-Shell Structure: An Effective Catalyst for Improving Catalytic Performances in Methanol-to-Olefins Reaction. ACS APPLIED MATERIALS & INTERFACES 2024; 16:14308-14320. [PMID: 38456610 DOI: 10.1021/acsami.3c19166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/09/2024]
Abstract
It is well known that low-silica SAPO-34, with an extra porosity (meso- and/or macropores) system, affords excellent catalytic performance in the methanol-to-olefins (MTO) reaction, while the direct synthesis of low-silica SAPO-34 with a hierarchical structure is difficult to achieve, principally because the crystal impurities are usually formed under a low silica content in a gel precursor. Herein, low-silica SAPO-34 nanocrystals were successfully fabricated for the first time by constructing an isomorphous core-shell structure in an epitaxial growth manner. In which, low-silica, ultrasmall nanosquare-shaped SAPO-34 crystals with the same growth orientation along the (100) crystal plane compactly grow on the monocrystal SAPO-34 cores. Crucially, the external surface acid properties of the core SAPO-34 with the Si-rich outer layer are effectively modified by the low-silica SAPO-34 shell. Furthermore, the growth process and Si-substitution mechanism of the shell zeolite were comprehensively investigated. It was found that with the prolonged crystallization time, more and more coordinated Si(4Al) and Si(3Al) structures via two substitution mechanisms (SM2 and SM3) are generated in the nanocrystalline SAPO-34 shell, which endow moderate acidity of the core-shell SAPO-34. Compared to the uncoated SAPO-34, the core-shell SAPO-34 performs a longer lifespan and a higher average selectivity of light olefins (ethylene plus propylene) when applied to the MTO reaction, which is attributed to the positive effects of the luxuriant interstitial pores offering a fast diffusion channel and the moderate acid density depressing the hydrogen transfer reaction of light olefins. This work provides new insights into the fabrication of low-silica SAPO-34 nanocrystals, which are based on the rational design of the isomorphous core-shell zeolite.
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Affiliation(s)
- Quanhua Wang
- Research Centre of Energy Chemical & Catalytic Technology, Taiyuan University of Technology, Taiyuan 030024, PR China
- Datang Nanjing Environmental Protection Technology Co., Ltd, Nanjing, Jiangsu 211111, China
| | - Weijiong Dai
- Research Centre of Energy Chemical & Catalytic Technology, Taiyuan University of Technology, Taiyuan 030024, PR China
| | - Yi Dai
- Research Centre of Energy Chemical & Catalytic Technology, Taiyuan University of Technology, Taiyuan 030024, PR China
| | - Meng Pan
- College of Biological and Chemical Engineering, Anhui Polytechnic University, Wuhu 241000, China
| | - Yanchao Liu
- Research Centre of Energy Chemical & Catalytic Technology, Taiyuan University of Technology, Taiyuan 030024, PR China
| | - Lichen Zhang
- Research Centre of Energy Chemical & Catalytic Technology, Taiyuan University of Technology, Taiyuan 030024, PR China
| | - Jiajun Zheng
- Research Centre of Energy Chemical & Catalytic Technology, Taiyuan University of Technology, Taiyuan 030024, PR China
| | - Xuguang Liu
- Research Centre of Energy Chemical & Catalytic Technology, Taiyuan University of Technology, Taiyuan 030024, PR China
| | - Ruifeng Li
- Research Centre of Energy Chemical & Catalytic Technology, Taiyuan University of Technology, Taiyuan 030024, PR China
| | - Luoning Ma
- Datang Nanjing Environmental Protection Technology Co., Ltd, Nanjing, Jiangsu 211111, China
| | - Hu Wang
- Datang Nanjing Environmental Protection Technology Co., Ltd, Nanjing, Jiangsu 211111, China
| | - Yuhao Zong
- Datang Nanjing Environmental Protection Technology Co., Ltd, Nanjing, Jiangsu 211111, China
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Olsson M, Govender R, Diaz A, Holler M, Menzel A, Abrahmsén-Alami S, Sadd M, Larsson A, Matic A, Liebi M. Multiscale X-ray imaging and characterisation of pharmaceutical dosage forms. Int J Pharm 2023:123200. [PMID: 37414373 DOI: 10.1016/j.ijpharm.2023.123200] [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: 05/01/2023] [Revised: 06/30/2023] [Accepted: 07/01/2023] [Indexed: 07/08/2023]
Abstract
A correlative, multiscale imaging methodology for visualising and quantifying the morphology of solid dosage forms by combining ptychographic X-ray computed nanotomography (PXCT) and scanning small- and wide-angle X-ray scattering (S/WAXS) is presented. The methodology presents a workflow for multiscale analysis, where structures are characterised from the nanometre to millimetre regime. Here, the method is demonstrated by characterising a hot-melt extruded, partly crystalline, solid dispersion of carbamazepine in ethyl cellulose. Characterisation of the morphology and solid-state phase of the drug in solid dosage forms is central as this affects the performance of the final formulation. The 3D morphology was visualised at a resolution of 80 nm over an extended volume through PXCT, revealing an oriented structure of crystalline drug domains aligned in the direction of extrusion. Scanning S/WAXS, showed that the nanostructure is similar over the cross section of the extruded filament, with minor radial changes in domain sizes and degree of orientation. The polymorphic forms of carbamazepine were qualified with WAXS, showing a heterogeneous distribution of the metastable forms I and II. This demonstrates the methodology for multiscale structural characterization and imaging to enable a better understanding of the relationships between morphology, performance, and processing conditions of solid dosage forms.
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Affiliation(s)
- Martina Olsson
- Department of Physics, Chalmers University of Technology, SE-412 96, Gothenburg, Sweden
| | - Rydvikha Govender
- Oral Product Development, Pharmaceutical Technology and Development, Operations, AstraZeneca, SE-43183 Gothenburg, Sweden; Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-412 96, Gothenburg, Sweden
| | - Ana Diaz
- Photon Science Division, Paul Scherrer Institut, Villigen PSI, 5232, Switzerland
| | - Mirko Holler
- Photon Science Division, Paul Scherrer Institut, Villigen PSI, 5232, Switzerland
| | - Andreas Menzel
- Photon Science Division, Paul Scherrer Institut, Villigen PSI, 5232, Switzerland
| | - Susanna Abrahmsén-Alami
- Innovation Strategies & External Liaison, Pharmaceutical Technology & Development, Operations, AstraZeneca, SE-43183 Gothenburg, Sweden
| | - Matthew Sadd
- Department of Physics, Chalmers University of Technology, SE-412 96, Gothenburg, Sweden
| | - Anette Larsson
- Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-412 96, Gothenburg, Sweden; FibRe-Centre for Lignocellulose-based Thermoplastics, Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden
| | - Aleksandar Matic
- Department of Physics, Chalmers University of Technology, SE-412 96, Gothenburg, Sweden; FibRe-Centre for Lignocellulose-based Thermoplastics, Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden; Wallenberg Wood Science Center, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden
| | - Marianne Liebi
- Department of Physics, Chalmers University of Technology, SE-412 96, Gothenburg, Sweden; Photon Science Division, Paul Scherrer Institut, Villigen PSI, 5232, Switzerland; Institute of Materials, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, 1015 Switzerland
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Burgos GL, Hernández-Espinell JR, Graciani-Massa T, Yao X, Borchardt-Setter KA, Yu L, López-Mejías V, Stelzer T. Role of Heteronucleants in Melt Crystallization of Crystalline Solid Dispersions. CRYSTAL GROWTH & DESIGN 2023; 23:49-58. [PMID: 38107196 PMCID: PMC10722868 DOI: 10.1021/acs.cgd.2c00444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2023]
Abstract
Few publications exist concerning polymorphic control during melt crystallization, particularly when employing heteronucleants. Here, the influence of a polymeric thin film (polyethylene terephthalate, PET) on the crystallization from melt of the polymorphic compound acetaminophen (ACM) in polyethylene glycol (PEG) was investigated. Molten ACM-PEG at different compositions was monitored using in situ Raman spectroscopy for nucleation induction time measurements and phase identification. Furthermore, X-ray diffraction (XRD) served to analyze the preferred orientation (PO) of the pastilles (solidified melt droplets) on PET-coated and uncoated substrates. The results indicate that PET-coated substrates qualitatively accelerate the nucleation of ACM form II (ACM II) in PEG compared to uncoated glass substrates. Additionally, the occurrence of ACM II in PEG was increased by an average of 10% when crystallized on PET-coated substrates compared to uncoated substrates. Overall, these results suggest that ACM can interact through hydrogen bonding with the PET-coated substrate, leading to faster nucleation. This investigation illustrates the effect of PET-coated substrates in the selective crystallization of ACM II in PEG as crystalline solid dispersions (CSDs). Ultimately, the results suggest the implementation of polymeric heteronucleants in melt crystallization processes, specifically, in advanced polymer-based formulation processes for the enhanced polymorphic form control of pharmaceutical compounds in CSDs.
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Affiliation(s)
- Giovanni López Burgos
- Department of Pharmaceutical Sciences, University of Puerto Rico, San Juan, Puerto Rico 00936, United States; Molecular Sciences Research Center, Crystallization Design Institute, University of Puerto Rico, San Juan, Puerto Rico 00926, United States
| | - José R Hernández-Espinell
- Molecular Sciences Research Center, Crystallization Design Institute, University of Puerto Rico, San Juan, Puerto Rico 00926, United States; Department of Chemistry, University of Puerto Rico, San Juan, Puerto Rico 00931, United States
| | - Tatiana Graciani-Massa
- Molecular Sciences Research Center, Crystallization Design Institute, University of Puerto Rico, San Juan, Puerto Rico 00926, United States; Department of Chemistry, University of Puerto Rico, San Juan, Puerto Rico 00931, United States
| | - Xin Yao
- Department of Chemistry, School of Pharmacy, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States
| | - Kennedy A Borchardt-Setter
- Department of Chemistry, School of Pharmacy, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States
| | - Lian Yu
- Department of Chemistry, School of Pharmacy, University of Wisconsin-Madison, Madison, Wisconsin 53705, United States
| | - Vilmalí López-Mejías
- Molecular Sciences Research Center, Crystallization Design Institute, University of Puerto Rico, San Juan, Puerto Rico 00926, United States; Department of Chemistry, University of Puerto Rico, San Juan, Puerto Rico 00931, United States
| | - Torsten Stelzer
- Department of Pharmaceutical Sciences, University of Puerto Rico, San Juan, Puerto Rico 00936, United States; Molecular Sciences Research Center, Crystallization Design Institute, University of Puerto Rico, San Juan, Puerto Rico 00926, United States
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Hernández Espinell JR, Toro V, Yao X, Yu L, Lopéz-Mejías V, Stelzer T. Solvent-Mediated Polymorphic Transformations in Molten Polymers: The Account of Acetaminophen. Mol Pharm 2022; 19:2183-2190. [PMID: 35475360 PMCID: PMC10950320 DOI: 10.1021/acs.molpharmaceut.2c00035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Solvent-mediated polymorphic transformations (SMPTs) employing nonconventional solvents (polymer melts) is an underexplored research topic that limits the application of polymer-based formulation processes. Acetaminophen (ACM), a widely studied active pharmaceutical ingredient (API), is known to present SMPTs spontaneously (<30 s) in conventional solvents such as ethanol. In situ Raman spectroscopy was employed to monitor the induction time for the SMPT of ACM II to I in polyethylene glycol (PEG) melts of different molecular weights (Mw, 4000, 10 000, 20 000, 35 000 g/mol). The results presented here demonstrate that the induction time for the SMPT of ACM II to I in PEG melts is driven by its diffusivity through the polymer melts. Compared to conventional solvents (i.e., ethanol) the mass transfer (diffusion coefficient, D) in melts is significantly hindered (Dethanol = 4.84 × 10-9 m2/s > DPEGs = 5.32 × 10-11-8.36 × 10-14 m2/s). Ultimately, the study proves that the induction time for the SMPT can be tuned by understanding the dispersant's physicochemical properties (i.e., η) and, thus, the D of the solute in the dispersant. This allows one to kinetically access and stabilize metastable forms or delay their transformations under given process conditions.
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Affiliation(s)
- José R Hernández Espinell
- Department of Chemistry, University of Puerto Rico, Río Piedras Campus, San Juan, Puerto Rico 00931, United States
- Crystallization Design Institute, Molecular Sciences Research Center, University of Puerto Rico, San Juan, PR 00926, United States
| | - Verónica Toro
- Department of Chemistry, University of Puerto Rico, Río Piedras Campus, San Juan, Puerto Rico 00931, United States
- Crystallization Design Institute, Molecular Sciences Research Center, University of Puerto Rico, San Juan, PR 00926, United States
| | - Xin Yao
- School of Pharmacy and Department of Chemistry, University of Wisconsin─Madison, Madison, Wisconsin 53705, United States
| | - Lian Yu
- School of Pharmacy and Department of Chemistry, University of Wisconsin─Madison, Madison, Wisconsin 53705, United States
| | - Vilmalí Lopéz-Mejías
- Department of Chemistry, University of Puerto Rico, Río Piedras Campus, San Juan, Puerto Rico 00931, United States
- Crystallization Design Institute, Molecular Sciences Research Center, University of Puerto Rico, San Juan, PR 00926, United States
| | - Torsten Stelzer
- Crystallization Design Institute, Molecular Sciences Research Center, University of Puerto Rico, San Juan, PR 00926, United States
- Department of Pharmaceutical Sciences, University of Puerto Rico, Medical Sciences Campus, San Juan, Puerto Rico 00936, United States
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Pardhi VP, Flora S. Stable solid dispersion of lurasidone hydrochloride with augmented physicochemical properties for the treatment of schizophrenia and bipolar disorder. Biopharm Drug Dispos 2020; 41:334-351. [PMID: 33080060 DOI: 10.1002/bdd.2252] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 09/08/2020] [Accepted: 10/07/2020] [Indexed: 12/30/2022]
Abstract
Crystalline solid dispersion of lurasidone hydrochloride (LH) was made with various polar and non-polar small molecules to overcome the poor aqueous solubility issue. LH-Glutathione (GSH) solid dispersion in 1:1 ratio was prepared by co-grinding method and characterized by using differential scanning calorimetry (DSC), powder X-ray diffraction, Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopy. GSH acts as antioxidant and reported for anti-schizophrenic activity may provide synergistic action with LH or reduce the side effects. LH in LH-GSH solid dispersion (SD) has shown improvement in solubility by 7.9 folds than plain drug which translated in terms of improved dissolution rate by two-folds. The in vitro dissolution results showed maximum dissolution rate with LH-GSH SD (97.85 ± 2.40%) compared to plain drug (50.5 ± 3.02%) at 15 min (t15 min, %) and thus, satisfying criteria of immediate release dosage form. DSC and FTIR data confirmed the stability of LH-GSH SD for 3 months at accelerated stability condition (40 ± 2°C and 75 ± 5% RH). The prepared LH-GSH SD can be used as a tool to target dual problems that is, enhanced physicochemical properties along with possible management of disorder which could be due to synergism with co-administered GSH. This approach is thought to be efficiently providing the relief to the psychological patients.
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Affiliation(s)
- Vishwas P Pardhi
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER)-Raebareli, Lucknow, Uttar Pradesh, India
| | - Swaran Flora
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER)-Raebareli, Lucknow, Uttar Pradesh, India
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