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Fang L, Xiao Y, Zhang C, Gao Z, Wu S, Gong J, Rohani S. Intermolecular interactions and solubility behavior of multicomponent crystal forms of 2,4-D: design, structure analysis, and solid-state characterization. CrystEngComm 2021. [DOI: 10.1039/d1ce01080h] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Five new multicomponent solid forms of 2,4-D were successfully synthesized. The equilibrium solubility measurement confirmed the improvements in water solubility of new multicomponent crystals.
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Affiliation(s)
- Lan Fang
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, The Co-Innovation Center of Chemistry and Chemical Engineering of Tianjin, Tianjin University, Tianjin, 300072, P. R. China
| | - Yuntian Xiao
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, The Co-Innovation Center of Chemistry and Chemical Engineering of Tianjin, Tianjin University, Tianjin, 300072, P. R. China
| | - Chengtian Zhang
- China Nuclear Mining Science and Technology Corporation, Tongzhou, Beijing, 10000, P. R. China
| | - Zhenguo Gao
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, The Co-Innovation Center of Chemistry and Chemical Engineering of Tianjin, Tianjin University, Tianjin, 300072, P. R. China
| | - Songgu Wu
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, The Co-Innovation Center of Chemistry and Chemical Engineering of Tianjin, Tianjin University, Tianjin, 300072, P. R. China
| | - Junbo Gong
- School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, The Co-Innovation Center of Chemistry and Chemical Engineering of Tianjin, Tianjin University, Tianjin, 300072, P. R. China
- Chemistry and Chemical Engineering Guangdong Laboratory, Shantou 515031, P. R. China
| | - Sohrab Rohani
- Department of Chemical and Biochemical Engineering, The University of Western Ontario, London, Ontario N6A 5B9, Canada
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2
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Odounga Odounga JE, Báthori NB. Systematic comparison of racemic and enantiopure multicomponent crystals of phenylsuccinic acid—the role of chirality. CrystEngComm 2020. [DOI: 10.1039/d0ce00072h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Comparison of binary cocrystals of chiral and racemic carboxylic acids showed that the introduction of chiral building blocks may lead to the formation of subclasses of multicomponent crystals with unique Z′′/Zr values combined with complex protonation stages of the molecules.
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Affiliation(s)
| | - Nikoletta B. Báthori
- Department of Chemistry
- Cape Peninsula University of Technology
- Cape Town
- South Africa
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3
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Sedghiniya S, Soleimannejad J, Janczak J. The salt–cocrystal spectrum in salicylic acid–adenine: the influence of crystal structure on proton-transfer balance. ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY 2019; 75:412-421. [DOI: 10.1107/s2053229619003127] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2019] [Accepted: 03/02/2019] [Indexed: 11/10/2022]
Abstract
At one extreme of the proton-transfer spectrum in cocrystals, proton transfer is absent, whilst at the opposite extreme, in salts, the proton-transfer process is complete. However, for acid–base pairs with a small ΔpK
a (pK
a of base − pK
a of acid), prediction of the extent of proton transfer is not possible as there is a continuum between the salt and cocrystal ends. In this context, we attempt to illustrate that in these systems, in addition to ΔpK
a, the crystalline environment could change the extent of proton transfer. To this end, two compounds of salicylic acid (SaH) and adenine (Ad) have been prepared. Despite the same small ΔpK
a value (≈1.2), different ionization states are found. Both crystals, namely adeninium salicylate monohydrate, C5H6N5
+·C7H5O3
−·H2O, I, and adeninium salicylate–adenine–salicylic acid–water (1/2/1/2), C5H6N5
+·C7H5O3
−·2C5H5N5·C7H6O3·2H2O, II, have been characterized by single-crystal X-ray diffraction, IR spectroscopy and elemental analysis (C, H and N) techniques. In addition, the intermolecular hydrogen-bonding interactions of compounds I and II have been investigated and quantified in detail on the basis of Hirshfeld surface analysis and fingerprint plots. Throughout the study, we use crystal engineering, which is based on modifications of the intermolecular interactions, thus offering a more comprehensive screening of the salt–cocrystal continuum in comparison with pure pK
a analysis.
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