aliphatic dicarboxylic acids
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Crystals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1151
Author(s):  
Vhukhudo Nethanani ◽  
Eustina Batisai

The aim of the study was to investigate the relationship between the melting point and the supramolecular structure of three multi-component crystals of aliphatic dicarboxylic acids with 2,2′-bipyridine and to investigate the conformations of 2,2′-bipyridine in published multi-component crystals. The crystals were prepared using the solvent evaporation method and were characterized using single-crystal X-ray diffraction (SCXRD), powder X-ray diffraction (PXRD), and differential scanning calorimetry (DSC). The crystal structures were further analyzed using CrystalExplorer, and the results were correlated with the melting points. The results of the conformation analysis of the reported multi-component crystals of 2,2′-bipyridine are also presented.


Author(s):  
Ksenia V. Drozd ◽  
Alex N. Manin ◽  
Alexander P. Voronin ◽  
Denis Boycov ◽  
Churakov Andrei ◽  
...  

Experimental and theoretical screening of multi-component crystal forms of miconazole (MCL), an antifungal drug, with ten aliphatic dicarboxylic acids was performed. Seven multi-component molecular crystals were isolated and identified by...


CrystEngComm ◽  
2021 ◽  
Author(s):  
Indira S Divya ◽  
Amrutha Surendran ◽  
Sunil SeethaLekshmi ◽  
Sunil Varughese

The anti-malarial drug quinine (QUN) has poor aqueous solubility and belongs to Biopharmaceutical Classification System (BCS) Class-II. We report 12 novel molecular salts of QUN with α,ω-aliphatic dicarboxylic acids, and...


Pharmaceutics ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 982
Author(s):  
Gustavo Carreño ◽  
Adolfo Marican ◽  
Sekar Vijayakumar ◽  
Oscar Valdés ◽  
Gustavo Cabrera-Barjas ◽  
...  

A series of hydrogels with a specific release profile of linezolid was successfully synthesized. The hydrogels were synthesized by cross-linking polyvinyl alcohol (PVA) and aliphatic dicarboxylic acids, which include succinic acid (SA), glutaric acid (GA), and adipic acid (AA). The three crosslinked hydrogels were prepared by esterification and characterized by equilibrium swelling ratio, infrared spectroscopy, thermogravimetric analysis, mechanical properties, and scanning electron microscopy. The release kinetics studies of the linezolid from prepared hydrogels were investigated by cumulative drug release and quantified by chromatographic techniques. Mathematical models were carried out to understand the behavior of the linezolid release. These data revealed that the sustained release of linezolid depends on the aliphatic dicarboxylic acid chain length, their polarity, as well as the hydrogel crosslinking degree and mechanical properties. The in vitro antibacterial assay of hydrogel formulations was assessed in an Enterococcus faecium bacterial strain, showing a significant activity over time. The antibacterial results were consistent with cumulative release assays. Thus, these results demonstrated that the aliphatic dicarboxylic acids used as crosslinkers in the PVA hydrogels were a determining factor in the antibiotic release profile.


2020 ◽  
Vol 8 (3) ◽  
pp. 182-189 ◽  
Author(s):  
Rajiv Kumar ◽  
Simranpreet Kaur ◽  
Navneet Singh ◽  
Honey Sharma ◽  
Shuchi Sharma

2019 ◽  
Vol 58 (25) ◽  
pp. 10855-10863 ◽  
Author(s):  
Kristiina Kaldas ◽  
Gert Preegel ◽  
Kati Muldma ◽  
Margus Lopp

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