Antibacterial and Cytotoxic Activities of Copper-Functionalized Silsesquioxane 3-n-Propylpyridinium Chloride

Abstract

Silsesquioxane 3-n-propylpyridinium chloride (SiPy + Cl -) is a water-soluble polymer that can be used as a promising material with remarkable biological effects. SiPy + Clcan form thin films on substrate surfaces and shows suitable adhesiveness. Besides, it has high affinity for metal ions. Considering this effect as exchanger polymer and the well-known antimicrobial and cytotoxic features of copper, the aim of this study was to perform the copper functionalization of silsesquioxane 3-n-propylpyridinium chloride Cu-SiPy + Cl − . The HIGHLIGHTS• Silsesquioxane 3-n-propylpyridinium chloride (SiPy + Cl -) was synthesized.• Copper functionalization of SiPy + Clwas performed to obtain Cu-SiPy + Cl -.• Antimicrobial and cytotoxic effects of SiPy + Cland Cu-SiPy + Clwere demonstrated.• Cu-SiPy + Clshows a promising use in oral care products.

Botanical Authentication of “Espinheira-Santa” [Monteverdia ilicifolia (Mart. ex Reissek) Biral] Samples by FTIR Spectroscopy Coupled with PCA and Photoacoustic Spectroscopy

“…The 13 powdered samples were analyzed by FTIR spectroscopy [21] as tablets using 4 mg of each sample and 200 mg of KBr (spectroscopic grade, Sigma Aldrich, St. Louis, MO, USA, 2%, w/w) in the Shimadzu spectrometer (model IR Prestige-21, Kyoto, Japan) at 64 scans/min, resolution of 4 cm-1, analysis mode of absorbance, in the range of 4000 to 400 cm-1 [22,23]. Ten measurements were performed on each sample with a time interval of seven days.…”

Green synthesis of Ag-Poly (styrene sulfonate) nanoparticles and their application in cotton fabric

“…This choice is grounded in SiPyCl favorable charge density and its proven ability to interact effectively with the polyanion, promoting precise control over the layering process (PEDROSO et al, 2022). The combination of Ag-PSS as the polyanion and SiPyCl as the polycation offers a synergistic approach to achieving uniform and consecutive deposition on the cotton fiber surface, which is instrumental in enhancing the fibers functionalities.…”