Structural Investigation of Water/Lecithin/Cyclohexane Microemulsions by FT-IR Spectroscopy

Characterization of progesterone loaded biodegradable blend polymeric nanoparticles

“…Lecithin presented a strong band at 2855 cm -1 , a band located at 2930 cm -1 with a shoulder at 2956 cm -1 and a small band at 3010 cm -1 due to the CH stretching (CAVALLARO et al, 1995). These bands could be found in figure 1 (highlighted area).…”

Preparation of curcumin-loaded nanoparticles and determination of the antioxidant potential of curcumin after encapsulation

“…Other curcumin characteristic bands can also be seen such as the aromatic C-C band (1602 cm Curcumin-loaded Eudragit S100/PLLA nanoparticles(3%wt cur) 160 22.5* 24* *Considering PLLA:Eudragit S100 mass proportion in the nanoparticles (1:1w/w). S100 absorption bands (carboxyl ester at 1728 cm -1 ) can also be found [10,29,30] (all absorption bands are indicated in Figure 3). Curcumin phenolic band was attenuated in the nanoparticles when comparing to pure curcumin suggesting that it was located inside the nanoparticles.…”

Comparative Study on the Structure of Water in Reverse Micelles Stabilized with Sodium Bis(2-ethylhexyl) Sulfosuccinate or Sodium Bis(2-ethylhexyl) Phosphate in n-Heptane

“…Following the initial assignment by Jain et al (3), several reports assigned the subpeak of ∼3310 cm −1 to the O-H stretching vibration of bulklike water in AOT-formed reverse micelles (15,22,24,25). However, it has been well demonstrated that the O-H stretching vibration of bulk water centers around 3420 cm −1 (15,22,23). Our IR results for AOT-and NaDEHP-formed reverse micelles also showed that the O-H stretching frequencies of solubilized water in the respective systems approached the frequency of bulk water (3417 cm −1 ) with increasing water content (1).…”

“…Since the deconvolution technique has been proven to be successful in studying the structure of solubilized water in reverse micelles (3,15,(22)(23)(24)(25), the FT-IR spectra obtained for the given systems were subjected to curve-fitting to investigate the water structure with the use of the Galactic PeakSolve program.…”