FT-IR and X-ray spectroscopic investigations of Na-diclofenac-cyclodextrins interactions.
The association of DCF-Na (the salt of the 2-[(2,6-dichlorophenyl)amino]-phenyl-acetic acid) with beta-CD (cyclodextrin) in some therapeutic formulas can contribute to the optimisation of the physico-chemical and pharmaceutical properties of the parent drug. The understanding of the interaction between DCF with beta-CD represents the objective of this study. FT-IR spectroscopy is one of the methods which clarify the nature of these interactions in complexes of such type. Therefore the changes in FT-IR spectra of binary dispersed systems DCF/beta-CD in physical mixture and coprecipitate from methanol (molar ratios: 1/1, 1/2, 2/3, 3/4, 7/4) were analysed. The analysis of the broadening of the X-ray powder diffraction line has been applied to investigate the average effective crystallite size, the mean square of the microstrain caused by distortions within beta-CD crystallite and the fault probability in the binary dispersed DCF/beta-CD coprecipitate system.
Bratu
I
I
Institute of Isotopic and Molecular Technology, Cluj-Napoca, Romania.
Astilean
S
S
Ionesc
C
C
Indrea
E
E
Huvenne
J P
JP
Legrand
P
P
D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000008:administration & dosage / Q000737:chemistry*; D003505:Cyclodextrins / Q000008:administration & dosage / Q000737:chemistry*; D004008:Diclofenac / Q000008:administration & dosage / Q000737:chemistry*; D004337:Drug Carriers; D004347:Drug Interactions; D006801:Humans; D046911:Macromolecular Substances; D017550:Spectroscopy, Fourier Transform Infrared; D014961:X-Ray Diffraction
D000894:Anti-Inflammatory Agents, Non-Steroidal; D003505:Cyclodextrins; D004337:Drug Carriers; D046911:Macromolecular Substances; D004008:Diclofenac