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Updated: Jun 26, 2026
10:10
Transport Properties of Ibuprofen Encapsulated in Cyclodextrin Nanosponge Hydrogels: A Proton HR-MAS NMR Spectroscopy Study
Published on: August 15, 2016
[Study on inclusion complexes of beta-cyclodextrin with zopiclone]
Yuan-yuan Chen1, Jia-jia Liu, Ke-wen Tang
1College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China. cyy622811@126.com
Guang Pu Xue Yu Guang Pu Fen Xi = Guang Pu
|January 7, 2009
Summary
Zopiclone's solubility significantly improves when complexed with beta-cyclodextrin, forming a stable inclusion complex. This process is spontaneous, exothermic, and pH-dependent, enhancing drug delivery potential.
Area of Science:
- Pharmaceutical Chemistry
- Physical Chemistry
Context:
- Zopiclone, a nonbenzodiazepine hypnotic, exhibits poor aqueous solubility, limiting its therapeutic applications.
- Beta-cyclodextrin (β-CD) is a cyclic oligosaccharide known for its ability to form inclusion complexes with poorly soluble drugs.
Purpose:
- To investigate the formation of zopiclone-beta-cyclodextrin (Zp-β-CD) inclusion complexes.
- To determine the influence of pH and temperature on complexation.
- To characterize the solid-state inclusion complex.
Summary:
- Phase solubility studies demonstrated that Zp-β-CD complex formation is concentration-dependent and enhanced by increased pH.
- Thermodynamic analysis indicated a spontaneous, exothermic complexation process (ΔG, ΔH, ΔS < 0).
- Solid-state characterization using IR and DTA confirmed the formation of a stable Zp-β-CD inclusion complex via solid grinding.
Impact:
- Beta-cyclodextrin effectively enhances zopiclone solubility, suggesting its potential as a valuable solubilizing agent for improving zopiclone formulations.
- The findings provide a foundation for developing more bioavailable zopiclone drug products.
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