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Peng W, Lin Z, Cao W, Zhang K, Heng W, Pang Z, Qian S, Gao Y, Zhang J, Wei Y. Crystal defects creation in Mannitol@CaCl 2 metal-organic framework by induced dehydration strategy for enhanced excipient mechanical properties. Int J Pharm 2024; 652:123837. [PMID: 38262584 DOI: 10.1016/j.ijpharm.2024.123837] [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: 10/12/2023] [Revised: 01/03/2024] [Accepted: 01/20/2024] [Indexed: 01/25/2024]
Abstract
The mechanical properties of solid pharmaceutical excipients are important for assisting drug tables production, and they determine the quality of the drug tablets. The purpose of this study was to explore the potential and mechanism of crystal defect engineering to improve the mechanical properties of Mannitol@CaCl2 MOF, a pharmaceutical excipient with metal-organic framework (MOF) structure designed and prepared in our previous study. In this study, a simple and efficient "induced dehydration strategy" was proposed to prepare Mannitol@CaCl2 MOF with crystal defects (DEMOF). SEM, TEM, HRTEM, PXRD, FTIR, DSC-TGA, and N2 adsorption-desorption isotherm revealed the successful introduction of lattice vacancy and macrostructural defects while preserving MOF's skeleton structure. Tabletability profiles indicated that DEMOF presented much better mechanical properties than the original MOF at the powder level. On single crystal and atomic scales, nanoindentation and DFT calculations revealed that the defect structure increased plasticity, decreased brittleness, and improved compressibility, resulting in DEMOF tablets with much higher tensile strength that met the criteria for direct compression excipients. The achieved performance modification illustrated the capability of defect engineering to tune mechanical properties of MOFs, and the Mannitol@CaCl2 DEMOF exhibited great potential to serve as a new direct compression pharmaceutical excipient.
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Affiliation(s)
- Wen Peng
- School of Pharmacy, China Pharmaceutical University, Nanjing, 211198, PR China; Changzhou Siyao Pharmaceuticals Co., LTD, Chang Zhou, Jiangsu 213018, PR China
| | - Zezhi Lin
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, PR China
| | - Wei Cao
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, PR China
| | - Ke Zhang
- School of Pharmacy, China Pharmaceutical University, Nanjing, 211198, PR China
| | - Weili Heng
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, PR China
| | - Zunting Pang
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, PR China
| | - Shuai Qian
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, PR China
| | - Yuan Gao
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, PR China.
| | - Jianjun Zhang
- School of Pharmacy, China Pharmaceutical University, Nanjing, 211198, PR China.
| | - Yuanfeng Wei
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, PR China.
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Wołoszyn Ł, Ilczyszyn MM, Kinzhybalo V. The dehydration process in the DL-phenylglycinium trifluoromethanesulfonate monohydrate crystal revealed by XRD, vibrational and DSC studies. ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY 2019; 75:1569-1579. [PMID: 31802746 DOI: 10.1107/s2053229619014402] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Accepted: 10/22/2019] [Indexed: 11/10/2022]
Abstract
Thermal analysis, X-ray diffraction and temperature-dependent IR spectroscopy were used to study the dehydration process of crystalline DL-phenylglycinium trifluoromethanesulfonate monohydrate (PGTFH), C8H10NO2+·CF3SO3-·H2O. PGTFH dehydrates in one step centred at 353 K and crystallizes in the monoclinic space group C2/c, whereas the anhydrous compound (PGTF) crystallizes in the triclinic space group P-1. The dehydration process in PGTFH is preceded by a weakening of both the noncovalent aromatic-aromatic interactions and the packing contacts. This process is accompanied by the breakage of medium-strength O-H...O hydrogen bonds between ions inside layers and a reorganization of the ions within the layers. This reorganization results in the formation of two different ion pairs (DL-phenylglycinium trifluoromethanesulfonate) and the formation of a new hydrogen-bond network. The dehydration process does not destroy the nature of the crystal structure. Both crystals, i.e. hydrated and anhydrous, have a layered structure, although the layers of each crystal are arranged somewhat differently.
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Affiliation(s)
- Łukasz Wołoszyn
- Faculty of Chemistry, University of Wrocław, 14 F. Joliot-Curie, Wrocław 50-383, Poland
| | - Maria M Ilczyszyn
- Faculty of Chemistry, University of Wrocław, 14 F. Joliot-Curie, Wrocław 50-383, Poland
| | - Vasyl Kinzhybalo
- Institute of Low Temperature and Structure Research, PAS, 2 Okólna, Wrocław 50-422, Poland
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Larsen AS, Rantanen J, Johansson KE. Computational Dehydration of Crystalline Hydrates Using Molecular Dynamics Simulations. J Pharm Sci 2016; 106:348-355. [PMID: 27863805 DOI: 10.1016/j.xphs.2016.10.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Revised: 09/27/2016] [Accepted: 10/11/2016] [Indexed: 11/20/2022]
Abstract
Molecular dynamics (MD) simulations have evolved to an increasingly reliable and accessible technique and are today implemented in many areas of biomedical sciences. We present a generally applicable method to study dehydration of hydrates based on MD simulations and apply this approach to the dehydration of ampicillin trihydrate. The crystallographic unit cell of the trihydrate is used to construct the simulation cell containing 216 ampicillin and 648 water molecules. This system is dehydrated by removing water molecules during a 2200 ps simulation, and depending on the computational dehydration rate, different dehydrated structures were observed. Removing all water molecules immediately and removing water relatively fast (10 water molecules/10 ps) resulted in an amorphous system, whereas relatively slow computational dehydration (3 water molecules/10 ps) resulted in a crystalline anhydrate. The structural changes could be followed in real time, and in addition, an intermediate amorphous phase was identified. The computationally identified dehydrated structure (anhydrate) was slightly different from the experimentally known anhydrate structure suggesting that the simulated computational structure could represent a kinetically trapped dehydration intermediate.
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Affiliation(s)
- Anders S Larsen
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
| | - Jukka Rantanen
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Kristoffer E Johansson
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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Bērziņš A, Actiņš A. Effect of Experimental and Sample Factors on Dehydration Kinetics of Mildronate Dihydrate: Mechanism of Dehydration and Determination of Kinetic Parameters. J Pharm Sci 2014; 103:1747-55. [DOI: 10.1002/jps.23972] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2014] [Revised: 03/04/2014] [Accepted: 03/25/2014] [Indexed: 01/16/2023]
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