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Majhi D, Stevensson B, Nguyen TM, Edén M. 1H and 13C chemical shift-structure effects in anhydrous β-caffeine and four caffeine-diacid cocrystals probed by solid-state NMR experiments and DFT calculations. Phys Chem Chem Phys 2024; 26:14345-14363. [PMID: 38700003 DOI: 10.1039/d3cp06197c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/05/2024]
Abstract
By using density functional theory (DFT) calculations, we refined the H atom positions in the structures of β-caffeine (C), α-oxalic acid (OA; (COOH)2), α-(COOH)2·2H2O, β-malonic acid (MA), β-glutaric acid (GA), and I-maleic acid (ME), along with their corresponding cocrystals of 2 : 1 (2C-OA, 2C-MA) or 1 : 1 (C-GA, C-ME) stoichiometry. The corresponding 13C/1H chemical shifts obtained by gauge including projector augmented wave (GIPAW) calculations agreed overall very well with results from magic-angle-spinning (MAS) nuclear magnetic resonance (NMR) spectroscopy experiments. Chemical-shift/structure trends of the precursors and cocrystals were examined, where good linear correlations resulted for all COO1H sites against the H⋯O and/or H⋯N H-bond distance, whereas a general correlation was neither found for the aliphatic/caffeine-stemming 1H sites nor any 13C chemical shift against either the intermolecular hydrogen- or tetrel-bond distance, except for the 13COOH sites of the 2C-OA, 2C-MA, and C-GA cocrystals, which are involved in a strong COOH⋯N bond with caffeine that is responsible for the main supramolecular stabilization of the cocrystal. We provide the first complete 13C NMR spectral assignment of the structurally disordered anhydrous β-caffeine polymorph. The results are discussed in relation to previous literature on the disordered α-caffeine polymorph and the ordered hydrated counterpart, along with recommendations for NMR experimentation that will secure sufficient 13C signal-resolution for reliable resonance/site assignments.
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Affiliation(s)
- Debashis Majhi
- Department of Materials and Environmental Chemistry, Stockholm University, SE-106 91, Stockholm, Sweden.
| | - Baltzar Stevensson
- Department of Materials and Environmental Chemistry, Stockholm University, SE-106 91, Stockholm, Sweden.
| | - Tra Mi Nguyen
- Department of Materials and Environmental Chemistry, Stockholm University, SE-106 91, Stockholm, Sweden.
| | - Mattias Edén
- Department of Materials and Environmental Chemistry, Stockholm University, SE-106 91, Stockholm, Sweden.
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Hareendran C, Alsirawan B, Paradkar A, Ajithkumar TG. In Situ Monitoring of Competitive Coformer Exchange Reaction by 1H MAS Solid-State NMR. Mol Pharm 2024; 21:1479-1489. [PMID: 38373877 DOI: 10.1021/acs.molpharmaceut.3c01118] [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] [Indexed: 02/21/2024]
Abstract
In a competitive coformer exchange reaction, a recent topic of interest in pharmaceutical research, the coformer in a pharmaceutical cocrystal is exchanged with another coformer that is expected to form a cocrystal that is more stable. There will be a competition between coformers to form the most stable product through the formation of hydrogen bonds. This will cause destabilization of the pharmaceutical products during processing or storage. Therefore, it is important to develop a mechanistic understanding of this transformation by monitoring each and every step of the reaction, employing a technique such as 1H nuclear magnetic resonance (NMR). In this study, an in situ monitoring of a coformer exchange reaction is carried out by 1H magic angle spinning (MAS) solid-state NMR (SSNMR) at a spinning frequency of 60 kHz. The changes in caffeine maleic acid cocrystals on addition of glutaric acid and caffeine glutaric cocrystals on addition of maleic acid were monitored. In all of the reactions, it has been observed that caffeine glutaric acid Form I is formed. When glutaric acid was added to 2:1 caffeine maleic acid, the formation of metastable 1:1 caffeine glutaric acid Form I was observed at the start of the experiment, indicating that the centrifugal pressure is enough for the formation. The difference in the end product of the reactions with a similar reaction pathway of 1:1 and 2:1 reactant stoichiometry indicates that a complete replacement of maleic acid has occurred only in the 1:1 stoichiometry of the reactants. The polymorphic transition of caffeine glutaric acid Form II to Form I at higher temperatures was a crucial reason that triggered the exchange of glutaric acid with maleic acid in the reaction of caffeine glutaric acid and maleic acid. Our results are novel since the new reaction pathways in competitive coformer exchange reactions enabled understanding the remarkable role of stoichiometry, polymorphism, temperature, and centrifugal pressure.
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Affiliation(s)
- Chaithanya Hareendran
- Central NMR Facility, and Physical/Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune 411008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Bashir Alsirawan
- Centre for Pharmaceutical Engineering Science, School of Pharmacy and Medical Sciences, University of Bradford, Bradford BD7 1DP, United Kingdom
| | - Anant Paradkar
- Centre for Pharmaceutical Engineering Science, School of Pharmacy and Medical Sciences, University of Bradford, Bradford BD7 1DP, United Kingdom
| | - T G Ajithkumar
- Central NMR Facility, and Physical/Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune 411008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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Abstract
Co-crystallization is a technique for modifying physicochemical properties of pharmaceutical ingredients with an aim to enhance the therapeutic efficacy and subsequent reduction in toxicity. The patent describes the development of oxaliplatin co-crystals using flavonoids (baicalein and naringenin) via solvent volatilization technique with an objective to improve solubility and stability in GI tract and reduced side/toxic effects. The co-crystals were characterized via differential scanning calorimetry, thermogravimetric analysis, x-ray diffraction analysis. The co-crystals exhibited slow drug release, delayed hydrolysis, low cytotoxicity and enhanced therapeutic activity on human gastric adenocarcinoma cells. However, suitable solvent for co-crystal production, large scale production and regulatory challenges for continuous manufacturing of co-crystals must be addressed.
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Colherinhas G, Ludwig V, da Costa Ludwig ZM. GIAO-NMR spectroscopy of the xanthine’s structures in water solution using S-MC/QM methodology: An evaluation of the DFT-functionals’ efficiency. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.117955] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Kozak A, Pindelska E. Spectroscopic analysis of the influence of various external factors on ethenzamide-glutaric acid (1:1) cocrystal formation. Eur J Pharm Sci 2019; 133:59-68. [PMID: 30910648 DOI: 10.1016/j.ejps.2019.03.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 03/14/2019] [Accepted: 03/21/2019] [Indexed: 11/27/2022]
Abstract
Cocrystal formation may affect manufacturability (flow, compaction and processability) as well as solubility/dissolution, hygroscopicity and stability properties of drugs. Therefore, cocrystallization could be used to improve the pharmaceutical properties of low-soluble drugs such as ethenzamide. In this project, solid-state nuclear magnetic resonance and Fourier transform infrared spectroscopy studies were performed for ethenzamide-glutaric acid to obtain more information about the ethenzamide cocrystallization process. The impact of the grinding time of the physical mixture (ethenzamide-glutaric acid) on cocrystal formation and the further spontaneous cocrystallization was evaluated using spectroscopic methods and curve-fitting analysis of the spectra. The influence of pressure on the yield of cocrystal formation was also described. Additionally, studies on the effect of magic-angle spinning during solid-state nuclear magnetic resonance spectra collection on the initiation of cocrystal formation, have been performed. Based on this research, conclusions regarding the influence of the different external factors, such as pressure during the tableting process and grinding time, on the cocrystal formation have been drawn for ethenzamide cocrystals.
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Affiliation(s)
- Agnieszka Kozak
- Medical University of Warsaw, Faculty of Pharmacy with the Laboratory Medicine Division, Department of Analytical Chemistry and Biomaterials, Banacha 1, 02-093 Warsaw, Poland.
| | - Edyta Pindelska
- Medical University of Warsaw, Faculty of Pharmacy with the Laboratory Medicine Division, Department of Analytical Chemistry and Biomaterials, Banacha 1, 02-093 Warsaw, Poland
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6
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Jin L, Liu C, Yang FZ, Wu DY, Tian ZQ. Coordination behavior of theophylline with Au(III) and electrochemical reduction of the complex. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.02.118] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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7
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Practical guidelines for the characterization and quality control of pure drug nanoparticles and nano-cocrystals in the pharmaceutical industry. Adv Drug Deliv Rev 2018; 131:101-115. [PMID: 29920294 DOI: 10.1016/j.addr.2018.06.009] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Revised: 06/08/2018] [Accepted: 06/11/2018] [Indexed: 12/14/2022]
Abstract
The number of poorly soluble drug candidates is increasing, and this is also seen in the research interest towards drug nanoparticles and (nano-)cocrystals; improved solubility is the most important application of these nanosystems. In order to confirm the functionality of these nanoparticles throughout their lifecycle, repeatability of the formulation processes, functional performance of the formed systems in pre-determined way and system stability, a thorough physicochemical understanding with the aid of necessary analytical techniques is needed. Even very minor deviations in for example particle size or size deviation in nanoscale can alter the product bioavailability, and the effect is even more dramatic with the smallest particle size fractions. Also, small particle size sets special requirements for the analytical techniques. In this review most important physicochemical properties of drug nanocrystals and nano-cocrystals are presented, suitable analytical techniques, their pros and cons, are described with the extra input on practical point of view.
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Pang W, Lv J, Du S, Wang J, Wang J, Zeng Y. Preparation of Curcumin-Piperazine Coamorphous Phase and Fluorescence Spectroscopic and Density Functional Theory Simulation Studies on the Interaction with Bovine Serum Albumin. Mol Pharm 2017; 14:3013-3024. [PMID: 28703594 DOI: 10.1021/acs.molpharmaceut.7b00217] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
In the present study, a new coamorphous phase (CAP) of bioactive herbal ingredient curcumin (CUR) with high solubilitythe was screened with pharmaceutically acceptable coformers. Besides, to provide basic information for the best practice of physiological and pharmaceutical preparations of CUR-based CAP, the interaction between CUR-based CAP and bovine serum albumin (BSA) was studied at the molecular level in this paper. CAP of CUR and piperazine with molar ratio of 1:2 was prepared by EtOH-assisted grinding. The as-prepared CAP was characterized by powder X-ray diffraction, modulated temperature differential scanning calorimetry, thermogravimetric analysis, Fourier-transform infrared, and solid-state 13C nuclear magnetic resonance. The 1:2 CAP stoichioimetry was sustained by C═O···H hydrogen bonds between the N-H group of the piperazine and the C═O group of CUR; piperazine stabilized the diketo structure of CUR in CAP. The dissolution rate of CUR-piperazine CAP in 30% ethanol-water was faster than that of CUR; the t50 values were 243.1 min for CUR and 4.378 min for CAP. Furthermore, interactions of CUR and CUR-piperazine CAP with BSA were investigated by fluorescence spectroscopy and density functional theory (DFT) calculation. The binding constants (Kb) of CUR and CUR-piperazine CAP with BSA were 10.0 and 9.1 × 103 L mol-1 at 298 K, respectively. Moreover, DFT simulation indicated that the interaction energy values of hydrogen-bonded interaction in the tryptophan-CUR and tryptophan-CUR-piperazine complex were -26.1 and -17.9 kJ mol-1, respectively. In a conclusion, after formation of CUR-piperazine CAP, the interaction forces between CUR and BSA became weaker.
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Affiliation(s)
- Wenzhe Pang
- College of Pharmaceutical Sciences, Hebei Medical University , Shijiazhuang, 050017, China
| | - Jie Lv
- College of Pharmaceutical Sciences, Hebei Medical University , Shijiazhuang, 050017, China
| | - Shuang Du
- College of Pharmaceutical Sciences, Hebei Medical University , Shijiazhuang, 050017, China
| | - Jiaojiao Wang
- College of Chemistry and Material Science, Hebei Normal University , Shijiazhuang 050024, China
| | - Jing Wang
- College of Pharmaceutical Sciences, Hebei Medical University , Shijiazhuang, 050017, China
| | - Yanli Zeng
- College of Chemistry and Material Science, Hebei Normal University , Shijiazhuang 050024, China
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Healy AM, Worku ZA, Kumar D, Madi AM. Pharmaceutical solvates, hydrates and amorphous forms: A special emphasis on cocrystals. Adv Drug Deliv Rev 2017; 117:25-46. [PMID: 28342786 DOI: 10.1016/j.addr.2017.03.002] [Citation(s) in RCA: 144] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Revised: 01/27/2017] [Accepted: 03/21/2017] [Indexed: 11/17/2022]
Abstract
Active pharmaceutical ingredients (APIs) may exist in various solid forms, which can lead to differences in the intermolecular interactions, affecting the internal energy and enthalpy, and the degree of disorder, affecting the entropy. Differences in solid forms often lead to differences in thermodynamic parameters and physicochemical properties for example solubility, dissolution rate, stability and mechanical properties of APIs and excipients. Hence, solid forms of APIs play a vital role in drug discovery and development in the context of optimization of bioavailability, filing intellectual property rights and developing suitable manufacturing methods. In this review, the fundamental characteristics and trends observed for pharmaceutical hydrates, solvates and amorphous forms are presented, with special emphasis, due to their relative abundance, on pharmaceutical hydrates with single and two-component (i.e. cocrystal) host molecules.
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Affiliation(s)
- Anne Marie Healy
- Synthesis and Solid State Pharmaceutical Centre, School of Pharmacy and Pharmaceutical Sciences, Trinity College Dublin, Dublin 2, Ireland.
| | - Zelalem Ayenew Worku
- Synthesis and Solid State Pharmaceutical Centre, School of Pharmacy and Pharmaceutical Sciences, Trinity College Dublin, Dublin 2, Ireland
| | - Dinesh Kumar
- Synthesis and Solid State Pharmaceutical Centre, School of Pharmacy and Pharmaceutical Sciences, Trinity College Dublin, Dublin 2, Ireland
| | - Atif M Madi
- School of Pharmacy and Pharmaceutical Sciences, Trinity College Dublin, Dublin 2, Ireland
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Szeleszczuk Ł, Pisklak DM, Zielińska-Pisklak M, Wawer I. Spectroscopic and structural studies of the diosmin monohydrate and anhydrous diosmin. Int J Pharm 2017; 529:193-199. [PMID: 28663085 DOI: 10.1016/j.ijpharm.2017.06.078] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Revised: 06/22/2017] [Accepted: 06/23/2017] [Indexed: 10/19/2022]
Abstract
Diosmin, a flavone glycoside frequently used in therapy of various veins diseases in monohydrate form, exhibits poor solubility in water and low bioavailability. Due to the fact that the anhydrous forms of drugs generally have better bioavailability than the corresponding hydrates, the aim of this study was to analyze the conversion of diosmin monohydrate (DSNM) to anhydrous diosmin (DSNA) that occurs upon heating. The mechanism of this transformation was examined as well as advanced structural studies of each form were performed using 13C CP/MAS SSNMR, DSC, FT-IR and PXRD techniques. Spectroscopic findings were supported by CASTEP-DFT calculations of NMR and IR parameters. The pathway of reversible transformation was specified as follows: DSNM upon heating for 24h at temperature up to 110°C losses non-crystalline water and converts into metastable form (DSNM*) that turns into DSNA during heating at temperature 140°C for next 24h. Under room temperature DSNA spontaneously absorbs moisture from air and turns into a DSNM within 72h. The detailed analysis of CP kinetic parameters (T1ρI) revealed presence of metastable, intermediate form of diosmin (DSNM*) and allowed its characterization. The results are essential for further studies comparing dissolution and bioavailability of DSNM and DSNA. The study provided an understanding of the conversion pathway of the diosmin monohydrate into its anhydrate form when it is exposed to increased temperature.
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Affiliation(s)
- Łukasz Szeleszczuk
- Faculty of Pharmacy with The Laboratory Medicine Division, Medical University of Warsaw, Department of Physical Chemistry, Banacha 1, 02-093 Warsaw Poland.
| | - Dariusz Maciej Pisklak
- Faculty of Pharmacy with The Laboratory Medicine Division, Medical University of Warsaw, Department of Physical Chemistry, Banacha 1, 02-093 Warsaw Poland
| | - Monika Zielińska-Pisklak
- Faculty of Pharmacy with the Laboratory Medicine Division, Medical University of Warsaw, Department of Biomaterials Chemistry, Chair and Department of Inorganic and Analytical Chemistry, Banacha 1, 02-093 Warsaw Poland
| | - Iwona Wawer
- Faculty of Pharmacy with The Laboratory Medicine Division, Medical University of Warsaw, Department of Physical Chemistry, Banacha 1, 02-093 Warsaw Poland
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11
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Pisklak DM, Zielińska-Pisklak M, Szeleszczuk Ł. Application of 13C NMR cross-polarization inversion recovery experiments for the analysis of solid dosage forms. Int J Pharm 2016; 513:538-542. [PMID: 27667758 DOI: 10.1016/j.ijpharm.2016.09.066] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 09/21/2016] [Accepted: 09/22/2016] [Indexed: 10/21/2022]
Abstract
Solid-state nuclear magnetic resonance (ssNMR) is a powerful and unique method for analyzing solid forms of the active pharmaceutical ingredients (APIs) directly in their original formulations. Unfortunately, despite their wide range of application, the ssNMR experiments often suffer from low sensitivity and peaks overlapping between API and excipients. To overcome these limitations, the crosspolarization inversion recovery method was successfully used. The differences in the spin-lattice relaxation time constants for hydrogen atoms T1(H) between API and excipients were employed in order to separate and discriminate their peaks in ssNMR spectra as well as to increase the intensity of API signals in low-dose formulations. The versatility of this method was demonstrated by different examples, including the excipients mixture and commercial solid dosage forms (e.g. granules and tablets).
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Affiliation(s)
- Dariusz Maciej Pisklak
- Faculty of Pharmacy, Medical University of Warsaw, Department of Physical Chemistry, Banacha 1, 02-093 Warsaw, Poland.
| | - Monika Zielińska-Pisklak
- Faculty of Pharmacy, Medical University of Warsaw, Department of Inorganic and Analytical Chemistry, Banacha 1, 02-093 Warsaw, Poland
| | - Łukasz Szeleszczuk
- Faculty of Pharmacy, Medical University of Warsaw, Department of Physical Chemistry, Banacha 1, 02-093 Warsaw, Poland
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12
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Effects of structural differences on the NMR chemical shifts in cinnamic acid derivatives: Comparison of GIAO and GIPAW calculations. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.04.075] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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13
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Sun M, Wu C, Fu Q, Di D, Kuang X, Wang C, He Z, Wang J, Sun J. Solvent-shift strategy to identify suitable polymers to inhibit humidity-induced solid-state crystallization of lacidipine amorphous solid dispersions. Int J Pharm 2016; 503:238-46. [DOI: 10.1016/j.ijpharm.2016.01.062] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Revised: 12/24/2015] [Accepted: 01/24/2016] [Indexed: 10/22/2022]
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14
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Pisklak DM, Zielińska- Pisklak MA, Szeleszczuk Ł, Wawer I. 13C solid-state NMR analysis of the most common pharmaceutical excipients used in solid drug formulations, Part I: Chemical shifts assignment. J Pharm Biomed Anal 2016; 122:81-9. [DOI: 10.1016/j.jpba.2016.01.032] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Revised: 01/08/2016] [Accepted: 01/12/2016] [Indexed: 10/22/2022]
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15
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Pisklak DM, Zielińska-Pisklak M, Szeleszczuk Ł, Wawer I. ¹³C solid-state NMR analysis of the most common pharmaceutical excipients used in solid drug formulations Part II: CP kinetics and relaxation analysis. J Pharm Biomed Anal 2016; 122:29-34. [PMID: 26836362 DOI: 10.1016/j.jpba.2016.01.030] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Revised: 01/08/2016] [Accepted: 01/12/2016] [Indexed: 11/17/2022]
Abstract
Excipients used in the solid drug formulations differ in their NMR relaxation and (13)C cross-polarization (CP) kinetics parameters. Therefore, experimental parameters like contact time of cross-polarization and repetition time have a major impact on the registered solid state NMR spectra and in consequence on the results of the NMR analysis. In this work the CP kinetics and relaxation of the most common pharmaceutical excipients: anhydrous α-lactose, α-lactose monohydrate, mannitol, sucrose, sorbitol, sodium starch glycolate type A and B, starch of different origin, microcrystalline cellulose, hypromellose, ethylcellulose, methylcellulose, hydroxyethylcellulose, sodium alginate, magnesium stearate, sodium laurilsulfate and Kollidon(®) were analyzed. The studied excipients differ significantly in their optimum repetition time (from 5 s to 1200 s) and T(1ρ)(I) parameters (from 2 ms to 73 ms). The practical use of those differences in the excipients composition analysis was demonstrated on the example of commercially available tablets containing indapamide as an API. The information presented in this article will help to choose the correct acquisition parameters and also will save the time and effort needed for their optimization in the NMR analysis of the solid drug formulations.
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Affiliation(s)
- Dariusz Maciej Pisklak
- Faculty of Pharmacy, Medical University of Warsaw, Department of Physical Chemistry, Banacha 1, 02-093 Warsaw, Poland.
| | - Monika Zielińska-Pisklak
- Faculty of Pharmacy, Medical University of Warsaw, Department of Inorganic and Analytical Chemistry, Banacha 1, 02-093 Warsaw, Poland
| | - Łukasz Szeleszczuk
- Faculty of Pharmacy, Medical University of Warsaw, Department of Physical Chemistry, Banacha 1, 02-093 Warsaw, Poland
| | - Iwona Wawer
- Faculty of Pharmacy, Medical University of Warsaw, Department of Physical Chemistry, Banacha 1, 02-093 Warsaw, Poland
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16
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Rezende CA, San Gil RAS, Borré LB, Pires JR, Vaiss VS, Resende JALC, Leitão AA, De Alencastro RB, Leal KZ. Combining Nuclear Magnetic Resonance Spectroscopy and Density Functional Theory Calculations to Characterize Carvedilol Polymorphs. J Pharm Sci 2015; 105:2648-2655. [PMID: 26372719 DOI: 10.1002/jps.24641] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Revised: 07/29/2015] [Accepted: 08/19/2015] [Indexed: 11/06/2022]
Abstract
The experiments of carvedilol form II, form III, and hydrate by (13)C and (15)N cross-polarization magic-angle spinning (CP MAS) are reported. The GIPAW (gauge-including projector-augmented wave) method from DFT (density functional theory) calculations was used to simulate (13)C and (15)N chemical shifts. A very good agreement was found for the comparison between the global results of experimental and calculated nuclear magnetic resonance (NMR) chemical shifts for carvedilol polymorphs. This work aims a comprehensive understanding of carvedilol crystalline forms employing solution and solid-state NMR as well as DFT calculations.
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Affiliation(s)
- Carlos A Rezende
- Universidade Federal Fluminense, Instituto de Química, Niteroi CEP24020-150, Brazil
| | - Rosane A S San Gil
- Universidade Federal do Rio de Janeiro, Instituto de Quimica, Rio de Janeiro CEP21941-900, Brazil.
| | - Leandro B Borré
- Universidade Federal do Rio de Janeiro, Instituto de Quimica, Rio de Janeiro CEP21941-900, Brazil
| | - José Ricardo Pires
- Universidade Federal do Rio de Janeiro, Instituto de Bioquímica Medica, Rio de Janeiro CEP21941-902, Brazil
| | - Viviane S Vaiss
- Departamento de Química, Universidade Federal de Juiz de Fora, Juiz de Fora CEP36036-330, Brazil
| | | | - Alexandre A Leitão
- Departamento de Química, Universidade Federal de Juiz de Fora, Juiz de Fora CEP36036-330, Brazil
| | - Ricardo B De Alencastro
- Universidade Federal do Rio de Janeiro, Instituto de Quimica, Rio de Janeiro CEP21941-900, Brazil
| | - Katia Z Leal
- Universidade Federal Fluminense, Instituto de Química, Niteroi CEP24020-150, Brazil
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17
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Adam AMA, Refat MS. Nanostructured products of the drug theophylline caused by charge transfer interactions and a binary solvent system: Morphology and nanometry. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2015.05.021] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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18
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Pindelska E, Szeleszczuk L, Pisklak DM, Majka Z, Kolodziejski W. Crystal structures of tiotropium bromide and its monohydrate in view of combined solid-state nuclear magnetic resonance and gauge-including projector-augmented wave studies. J Pharm Sci 2015; 104:2285-92. [PMID: 25981387 DOI: 10.1002/jps.24490] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2015] [Revised: 04/09/2015] [Accepted: 04/15/2015] [Indexed: 12/19/2022]
Abstract
Tiotropium bromide is an anticholinergic bronchodilator used in the management of chronic obstructive pulmonary disease. The crystal structures of this compound and its monohydrate have been previously solved and published. However, in this paper, we showed that those structures contain some major errors. Our methodology based on combination of the solid-state nuclear magnetic resonance (NMR) spectroscopy and quantum mechanical gauge-including projector-augmented wave (GIPAW) calculations of NMR shielding constants enabled us to correct those errors and obtain reliable structures of the studied compounds. It has been proved that such approach can be used not only to perform the structural analysis of a drug substance and to identify its polymorphs, but also to verify and optimize already existing crystal structures.
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Affiliation(s)
- Edyta Pindelska
- Faculty of Pharmacy, Medical University of Warsaw, Department of Inorganic and Analytical Chemistry, Warsaw, 02-093, Poland
| | - Lukasz Szeleszczuk
- Faculty of Pharmacy, Medical University of Warsaw, Department of Physical Chemistry, Warsaw, 02-093, Poland
| | - Dariusz Maciej Pisklak
- Faculty of Pharmacy, Medical University of Warsaw, Department of Physical Chemistry, Warsaw, 02-093, Poland
| | - Zbigniew Majka
- Pharmaceutical Company Adamed Ltd., Czosnów, 05-152, Poland
| | - Waclaw Kolodziejski
- Faculty of Pharmacy, Medical University of Warsaw, Department of Inorganic and Analytical Chemistry, Warsaw, 02-093, Poland
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19
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Pindelska E, Szeleszczuk L, Pisklak DM, Mazurek A, Kolodziejski W. Solid-State NMR as an Effective Method of Polymorphic Analysis: Solid Dosage Forms of Clopidogrel Hydrogensulfate. J Pharm Sci 2015; 104:106-13. [DOI: 10.1002/jps.24249] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Revised: 09/23/2014] [Accepted: 10/07/2014] [Indexed: 11/11/2022]
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