期刊
ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE CRYSTAL ENGINEERING AND MATERIALS
卷 71, 期 -, 页码 437-446出版社
INT UNION CRYSTALLOGRAPHY
DOI: 10.1107/S2052520615011191
关键词
cocrystallization; salt co-crystals; active pharmaceutical ingredients (APIs); lomefloxacin; solubility
资金
- National Natural Science Foundation of China [21201026]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology [BM2012110]
- Qing Lan Project
- Natural Science Fund for Colleges and Universities in the Jiangsu Province [12KJB150002]
The cocrystallization of lomefloxacin (Lf) with barbituric acid (HBA) and/or isophthalic acid (H(2)ip) leads to novel binary and ternary salts via hydrogenbonding recognition. X-ray single-crystal diffraction analyses show that zwitterionic lomefloxacin can adjust itself to fulfill a different supramolecular array in either binary salts or ternary salt co-crystals, formulated as [HLf]center dot[Hip]center dot H2O (1), [HLf]center dot[BA]center dot[HBA]center dot H2O (2) and [HLf]center dot[BA]center dot[H(2)ip]center dot CH3OH center dot H2O (3). These pharmaceutical agents present uniform charge-assisted hydrogen-bonding networks between HLf cations and acidic coformers with the lattice capturing water molecules. Structural comparison of (2) and (3) indicated that a delicate balance of geometries and hydrogenbonding partners is required for stacking to favor the formation of ternary salt co-crystals. Cocrystallization was able to overcome the water insolubility of lomefloxacin. Both the salt co-crystals display enhanced solubility and better pharmaceutical applicability.
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