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Peng B, Shu J, Hou Z, Qian S, Yan B, Zhang B, Zhao Y, Su B, Zhang C. Vibrational spectroscopic detection and analysis of salicylic acid and aspirin binary cocrystal. Int J Pharm 2024; 651:123767. [PMID: 38199448 DOI: 10.1016/j.ijpharm.2024.123767] [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: 08/29/2023] [Revised: 12/28/2023] [Accepted: 12/31/2023] [Indexed: 01/12/2024]
Abstract
Salicylic acid is a raw material for preparing aspirin and holds an important position in medical history. Studying the crystallization of these two drugs is of great significance in improving their dissolution rate, bioavailability, and physical stability. Although various techniques have been used for structural characterization, there is still a lack of information on the collective vibrational behavior of aspirin and salicylic acid eutectic compounds. Firstly, two starting materials (salicylic acid and aspirin) were ground in a 1:1 M ratio to prepare eutectic compounds. The eutectic composition was studied using vibrational spectroscopy techniques, such as X-ray powder diffusion (XRPD), terahertz time-domain spectroscopy (THz-TDS), and Raman spectroscopy. Additionally, the structure of the aspirin and salicylic acid eutectic was simulated and optimized using density functional theory. It was found that the eutectic type II was the most consistent with the experiment, and the corresponding vibration modes of each peak were provided. These results offer a unique method for characterizing the structural composition of eutectic crystals, which can be utilized to enhance the physical and chemical properties, as well as the pharmacological activity, of specific drugs at the molecular level.
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Affiliation(s)
- Bo Peng
- Department of Physics, Capital Normal University, Beijing 100048, China; Beijing Advanced Innovation Centre for Imaging Theory and Technology, Beijing 100048, China; Beijing Key Laboratory for Terahertz Spectroscopy and Imaging, Beijing 100048, China; Key Laboratory of Terahertz Optoelectronics, Ministry of Education, Beijing 100048, China
| | - Jingyi Shu
- Department of Physics, Capital Normal University, Beijing 100048, China; Beijing Advanced Innovation Centre for Imaging Theory and Technology, Beijing 100048, China; Beijing Key Laboratory for Terahertz Spectroscopy and Imaging, Beijing 100048, China; Key Laboratory of Terahertz Optoelectronics, Ministry of Education, Beijing 100048, China
| | - Zeyu Hou
- Department of Physics, Capital Normal University, Beijing 100048, China; Beijing Advanced Innovation Centre for Imaging Theory and Technology, Beijing 100048, China; Beijing Key Laboratory for Terahertz Spectroscopy and Imaging, Beijing 100048, China; Key Laboratory of Terahertz Optoelectronics, Ministry of Education, Beijing 100048, China
| | - Siyu Qian
- Department of Physics, Capital Normal University, Beijing 100048, China; Beijing Advanced Innovation Centre for Imaging Theory and Technology, Beijing 100048, China; Beijing Key Laboratory for Terahertz Spectroscopy and Imaging, Beijing 100048, China; Key Laboratory of Terahertz Optoelectronics, Ministry of Education, Beijing 100048, China
| | - Bingxin Yan
- Department of Physics, Capital Normal University, Beijing 100048, China; Beijing Advanced Innovation Centre for Imaging Theory and Technology, Beijing 100048, China; Beijing Key Laboratory for Terahertz Spectroscopy and Imaging, Beijing 100048, China; Key Laboratory of Terahertz Optoelectronics, Ministry of Education, Beijing 100048, China
| | - Boyan Zhang
- Department of Physics, Capital Normal University, Beijing 100048, China; Beijing Advanced Innovation Centre for Imaging Theory and Technology, Beijing 100048, China; Beijing Key Laboratory for Terahertz Spectroscopy and Imaging, Beijing 100048, China; Key Laboratory of Terahertz Optoelectronics, Ministry of Education, Beijing 100048, China
| | - Yuhan Zhao
- Department of Physics, Capital Normal University, Beijing 100048, China; Beijing Advanced Innovation Centre for Imaging Theory and Technology, Beijing 100048, China; Beijing Key Laboratory for Terahertz Spectroscopy and Imaging, Beijing 100048, China; Key Laboratory of Terahertz Optoelectronics, Ministry of Education, Beijing 100048, China
| | - Bo Su
- Department of Physics, Capital Normal University, Beijing 100048, China; Beijing Advanced Innovation Centre for Imaging Theory and Technology, Beijing 100048, China; Beijing Key Laboratory for Terahertz Spectroscopy and Imaging, Beijing 100048, China; Key Laboratory of Terahertz Optoelectronics, Ministry of Education, Beijing 100048, China.
| | - Cunlin Zhang
- Department of Physics, Capital Normal University, Beijing 100048, China; Beijing Advanced Innovation Centre for Imaging Theory and Technology, Beijing 100048, China; Beijing Key Laboratory for Terahertz Spectroscopy and Imaging, Beijing 100048, China; Key Laboratory of Terahertz Optoelectronics, Ministry of Education, Beijing 100048, China
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Fang Z, Xu H, Xu Q, Meng L, Lu N, Li R, Müller-Buschbaum P, Zhong Q. High Efficiency of Formaldehyde Removal and Anti-bacterial Capability Realized by a Multi-Scale Micro-Nano Channel Structure in Hybrid Hydrogel Coating Cross-Linked on Microfiber-Based Polyurethane. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37429826 DOI: 10.1021/acsami.3c07210] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/12/2023]
Abstract
Inspired by the transpiration in the tree stem having a vertical and porous channel structure, high efficiency of formaldehyde removal is realized by the multi-scale micro-nano channel structure in a hybrid P(AAm/DA)-Ag/MgO hydrogel coating cross-linked on microfiber-based polyurethane. The present multi-scale channel structure is formed by a joint effect of directional freezing and redox polymerization as well as nanoparticles-induced porosity. Due to the large number of vertically aligned channels of micrometer size and an embedded porous structure of nanometer size, the specific surface area is significantly increased. Therefore, formaldehyde from solution can be rapidly adsorbed by the amine group in the hydrogels and efficiently degraded by the Ag/MgO nanoparticles. By only immersing in formaldehyde solution (0.2 mg mL-1) for 12 h, 83.8% formaldehyde is removed by the hybrid hydrogels with a multi-scale channel structure, which is 60.8% faster than that observed in hydrogels without any channel structure. After cross-linking the hybrid hydrogels with a multi-scale channel structure to microfiber-based polyurethane and exposing to the formaldehyde vapor atmosphere, 79.2% formaldehyde is removed in 12 h, which is again 11.2% higher than that observed in hydrogels without any channel structure. Unlike the traditional approaches to remove formaldehyde by the light catalyst, no external conditions are required in our present hybrid hydrogel coating, which is very suitable for indoor use. In addition, due to the formation of free radicals by the Ag/MgO nanoparticles, the cross-linked hybrid hydrogel coating on polyurethane synthetic leather also shows good anti-bacterial capability. 99.99% of Staphylococcus aureus can be killed on the surface. Based on the good ability to remove formaldehyde and to kill bacteria, the obtained microfiber-based polyurethane cross-linked with a hybrid hydrogel coating containing a multi-scale channel structure can be used in a broad field of applications, such as furniture and car interior parts, to simultaneously solve the indoor air pollution and hygiene problems.
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Affiliation(s)
- Zheng Fang
- Key Laboratory of Intelligent Textile and Flexible Interconnection of Zhejiang Province, Key Laboratory of Advanced Textile Materials & Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, 928 Second Avenue, 310018 Hangzhou, China
| | - Huawei Xu
- Hexin Kuraray Micro Fiber Leather (Jiaxing) Co. Ltd., 777 Pingnan Road, 314003 Jiaxing, China
| | - Qiang Xu
- Hexin Kuraray Micro Fiber Leather (Jiaxing) Co. Ltd., 777 Pingnan Road, 314003 Jiaxing, China
| | - LiuBang Meng
- Hexin Kuraray Micro Fiber Leather (Jiaxing) Co. Ltd., 777 Pingnan Road, 314003 Jiaxing, China
| | - Nan Lu
- National Engineering Lab for Textile Fiber Materials and Processing Technology, School of Materials Science & Engineering, Zhejiang Sci-Tech University, 310018 Hangzhou, China
| | - Renhong Li
- National Engineering Lab for Textile Fiber Materials and Processing Technology, School of Materials Science & Engineering, Zhejiang Sci-Tech University, 310018 Hangzhou, China
| | - Peter Müller-Buschbaum
- TUM School of Natural Sciences, Department of Physics, Chair for Functional Materials, Technical University of Munich, James-Franck-Street 1, 85748 Garching, Germany
- Heinz Maier-Leibnitz Zentrum (MLZ), Technical University of Munich, Lichtenbergstr. 1, 85748 Garching, Germany
| | - Qi Zhong
- Key Laboratory of Intelligent Textile and Flexible Interconnection of Zhejiang Province, Key Laboratory of Advanced Textile Materials & Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, 928 Second Avenue, 310018 Hangzhou, China
- TUM School of Natural Sciences, Department of Physics, Chair for Functional Materials, Technical University of Munich, James-Franck-Street 1, 85748 Garching, Germany
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Bi TJ, Xu LK, Wang F, Li XY. Solvent effects for vertical absorption and emission processes in solution using a self-consistent state specific method based on constrained equilibrium thermodynamics. Phys Chem Chem Phys 2018; 20:13178-13190. [PMID: 29717314 DOI: 10.1039/c8cp00930a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A self-consistent state specific (SS) method in the framework of TDDFT is presented to account for solvent effects on absorption and emission processes for molecules in solution. In these processes, the initial state is an equilibrium state, while the polarization of the solvent is in nonequilibrium with the electron density of the solute in the final state. Nonequilibrium solvation free energy is calculated based on a novel nonequilibrium solvation model with constrained equilibrium manipulation. The bulk solvent effects are considered using the polarizable continuum method (PCM), where the solvent-solute interaction is described with a reaction field. Molecular orbitals and orbital energies in the presence of the reaction field corresponding to the excited state are employed and the response of the solvent is not included in the TDDFT calculations. A self-consistent procedure is designed to obtain the excited state reaction field. The equations based on this new nonequilibrium solvation model in the framework of the self-consistent SS-PCM/TDDFT method for calculation of vertical absorption and emission energies are presented and implemented in the Q-Chem package. Vertical absorption and emission energies for several small molecules in solution using the newly developed code are calculated and compared with available experimental data and the results of other theoretical studies. Solvent shifts of absorption and emission energies are reasonably reproduced with this approach. The new model is a promising approach to study nonequilibrium absorption and emission processes in solution.
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Affiliation(s)
- Ting-Jun Bi
- College of Chemical Engineering, Sichuan University, Chengdu 610065, China.
| | - Long-Kun Xu
- College of Chemical Engineering, Sichuan University, Chengdu 610065, China.
| | - Fan Wang
- Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China.
| | - Xiang-Yuan Li
- College of Chemical Engineering, Sichuan University, Chengdu 610065, China.
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