جستجوی مقالات مرتبط با کلیدواژه « استامینوفن » در نشریات گروه « شیمی »

In the present research work, multi-walled carbon nanotubes-metal nanoparticles (M-MWCNT; M = Cu, Mn) nanohybrids were prepared by chemical reduction method and the resulting nanohybrids were used for modification of carbon paste electrode (CPE) including 1-butyl 3-methyl-imidazolium hexafluorophosphate as an ionic liquid (IL). For this purpose, functionalized MWCNT and metallic precursors were chemically reduced by hydrazine monohydrate. Morphology and size of the particles were investigated by FE-SEM. FE-SEM studies showed the formation of Cu and Mn nanoparticles with average sizes of approximately 65 and 90 nm onto MWCNT surface, respectively. Elemental mapping of the prepared nanohybrids demonstrated relatively uniform dispersion of Cu and Mn nanoparticles onto the MWCNT surface. By XRD, the crystalline structure of copper and manganase nanoparticles in nanohybrides was identified. The capability of the CPEs including IL and resulting nanohybrides for electrocatalytic oxidation of acetaminophen was studied in 0.1 M phosphate buffer solution (pH=7.0). The obtained results showed the good electrocatalytic activity of modified electrodes towards acetaminophen oxidation. Also, M-MWCNT/IL/CPE nanohybrid in addition of high surface area, due to the synergistic effect, showed higher electrocatalytic activity towards acetaminophen oxidation that those other electrodes used in this research. Detection limits for Cu-MWCNT/IL/CPE were obtained 6.7 and 0.35 μM by cyclic voltammetry (CV) and differential pulse voltammetry (DPV) methods. Also, for Mn-MWCNT/IL/CPE, detection limits were calculated 4.6 and 0.2 μM by CV and DPVmethods, respectively.

In this study, two metal-organic frameworks of UMCM-150 entitled Fe1Cu2(BHTC)2 and Cu3(BHTC)2 were used to delivery and release of  acetaminophen  as a non-steroidal drug. These frameworks were synthesized using solvothermal method. The crystallinity of the synthesized metal-organic frameworks was confirmed by SEM and XRD analyses. The stability of particles was determined by DLS analysis and their thermal stability was evaluated by TGA analysis. Also, the surface area, volume and size of pores were also measured by BET analysis that indicated a particularly suitable surface area and porosity of the pores. After loading acetaminophen in carriers with 25.29% efficiency for Fe1Cu2(BHTC)2, and 10.82% for Cu3(BHTC)2, the release of drug was evaluated in saline phosphate buffer solution at pH = 7.4. The release efficiencies of Fe1Cu2(BHTC)2 and Cu3(BHTC)2, were obtained 41.45 and 57.5%, respectively. Also, various kinetic models (zero, first order, Higuchi and Korsmeyer-Peppas) were used to interpret the release data that the Korsmeyer-Peppas model (R2=) reasonably described the release results. Based on the obtained results, both synthesized metal organic frameworks are promising option for the delivery and slow release of acetaminophen.