Photoreactivity and Thermogravimetry of Copper(II) Complexes of N-Salicylideneaniline and Its Derivatives

Abstract

Cu II -complexes of N-salicylideneaniline and its derivatives were not light sensitive in most solvents such as acetonitrile. A photo-decomposition occurred upon irradiation in halocarbon solvents such as CHCl 3 . It has been suggested that such photoreactivity is attributed to the reactivity of charge-transfer to solvent (CTTS) excited state attained upon irradiation. A mechanism has been proposed to account for the results obtained. The complexes have been thermally analysed in nitrogen and static air using thermogravimetry (TG) and derivative thermogravimetry (DTG). The thermal degradation of the complexes proceeds in two or three stages. The kinetic parameters obtained from the Coats-Redfern and Horowitz-Metzger equations show the kinetic compensation effect.

Identifying the Anti-MERS-CoV and Anti-HcoV-229E Potential Drugs from the Ginkgo biloba Leaves Extract and Its Eco-Friendly Synthesis of Silver Nanoparticles

“…This can be attributed to the bioactive molecules such as phenolics, flavonoids, terpenoids, and ginkgolides that are present in the GB extract that is involved in the bioreduction process. In Figure 7 , FT-IR of GB leaf extract shows the presence of –CH stretching vibrations of –CH 3 or –CH functional groups at 2958 cm −1 [ 58 ], O–H stretching at 3390 cm −1 , C–O stretching and carboxyl C=O at 1378 cm −1 and 1720 cm −1 , respectively, alkylphenols (1078 cm −1 ), and aromatic C=C (1632 cm −1 ) [ 5 , 59 , 60 , 61 , 62 , 63 ]. The peaks at 1632 and 1638 cm −1 were for O–H, C–O, and C=O as functional groups of GB extract.…”

Biosynthesis approach of zinc oxide nanoparticles for aqueous phosphorous removal: physicochemical properties and antibacterial activities

“…The distinctive peak for hexagonal wurtzite ZnO is at 374 nm, and this is quite similar to how ZnO NPs are made by Parthenium leaf extract [ 44 ]. Because shallow levels have developed, the absorption peak has a red shift of roughly 9 nm relative to that of bulk ZnO (365 nm) [ 45 , 46 ]. Additionally, no additional peaks in the spectrum were seen outside the typical peak, proving the great purity of ZnO NPs made from onion extract.…”

Biosynthesis approach of zinc oxide nanoparticles for aqueous phosphorous removal: physicochemical properties and antibacterial activities

“…[37]. Because shallow levels have developed, the absorption peak has a red shift of roughly 9 nm relative to that of bulk ZnO (365 nm) [38,39]. Additionally, no additional peaks in the spectrum were seen outside the typical peak, proving the great purity of ZnO NPs made from onion extract.…”