Co(III) based surfactant complexes and their Dye, BSA and free radical activities

Study reports the preparation of metal/surfactant complexes or Metal Organic Ionic Framework (MOIF) based on ionic interaction of [Co(NH3)6]3+ and Dioctyl sulfosuccinate (AOT)/Sodium dodecyl sulfate (SDS). MOIF is result of strong ionic interaction between cationic and anionic moieties without disturbing their own structures. MOIF of [Co(NH3)6]3+ and SDS was found in solid powdery form while [Co(NH3)6]3+ + AOT produced sticky material. UV/Vis, FTIR, Raman and XRD measurements were used to characterize the MOIFs. The ionic interaction between cationic complex [Co(NH3)6]3+ and anionic sulphur of AOT/SDS was confirmed by comparing spectra with their parental moieties. MOIF containing hydrophilic and hydrophobic groups showed their dye interaction activity studied with methyl orange (MO) and methylene blue (MB) depicting impact of linear and iso-alkyl chain ánd hydrophilic amine groups. MOIF showed their protein binding nature, studied with bovine serum albumin (BSA), analyzed with spectrophotometric titrations revealing that hydrophobicity affects the interaction. In Dye and protein interactions, MOIF of [Co(NH3)6]3+ + AOT showed strong activities than MOIF of [Co(NH3)6]3+ + SDS due to more hydrophobicity associated with MOIF of [Co(NH3)6]3+ + AOT. MOIFs have also shown good scavenging effect tested in vitro against free radical, 2,2-diphenyl-1-picrylhydrazyl (DPPH), and the same, strong interaction for MOIF of [Co(NH3)6]3+ + AOT noticed

Photocatalytic degradation of rose Bengal by semiconducting zinc sulphide used as a photocatalyst

Various semiconductors have been used as photocatalysts for removal of different dyes from their aqueous solutions. Zinc sulphide semiconductor is used in the present investigation as a photocatalyst for the removal of rose Bengal dye. Effect of different parameters, which affect the rate of reaction; like pH, concentration of dye, amount of semiconductor and light intensity have been studied. A mechanism has also been proposed in which hydroxyl radicals are shown as an active oxidizing species

Metallic and non-metallic anionic interaction activities estimated with sound velocity and refractive index

Density (ρ ± 10−3 kg m−3), sound velocity (VS ± 10−2 ms−1) as acoustic property and refractive index (μri ± 10−4) for 0.01–0.1 m K2Cr2O7, K2HPO4, KMnO4, KH2PO4, KCl, and KOH aqueous salts with compressibility attained with ion–solvent interaction (ISI) are reported at 0.01 interval and 293.15 K. Ionic internal pressure generated with ISI is expressed as adiabatic compressibility (β, pa−1) with relative change (Δβ/β0) and apparent molal compressibility (ϕk, m2N−1) with specific ionic activities for metallic and non-metallic anions. Linear regression generated VS0, μri0, ϕk0, and β0 as limiting data for analysis of speed of light and sound. The VS0 as KH2PO4 > K2HPO4 > KOH > K2Cr2O7 > KCl > KMnO4 denoted a minimum VS0 metallic anions. With concentrations, the sound velocity and refractive index are noted as ISI functions where the sound and light waves were in opposite trends. The Mn0 and Cr0 transitional metals with anions of the K2Cr2O7 and KMnO4 have affected the compressibility as K2Cr2O7 > KMnO4 due to 2Cr+6. The VS0, μri0, ϕk0, and β0 analyzed their ionic strengths in comparison to HPO4-, H2PO4-, Cl−, and OH− as non-metallic anions considering the interactions as sensors. A molionic model of ion–water interaction was proposed to generalize ion-molecular interactions in industrial mixtures