The synthesis and characterization of iron nanoparticles with lemon peel and its use in magnetic solid phase extraction for trace levels of lead (II).

In this study, a new magnetic solid phase extraction method (MSPE) was developed for the enrichment and separation of trace amount Pb(II) on the magnetic nanoparticles synthesized using lemon peel (FeO-LP). The determination of Pb(II) in the samples was performed with inductively coupled plasma mass spectrometry. The FeO-LP was characterized by scanning electron microscopy, X-ray powder diffractometry, Brunauer-Emmett-Teller surface area analysis, and vibration sample magnetometry.

A theoretical evaluation on free radical scavenging activity of 3-styrylchromone derivatives: the DFT study.

Chromone (4H-chromen-4-one, 4H-1-benzopyran-4-one) and related compounds are important pharmacophores and privileged structures in medicinal chemistry because of their important biological activities such as anti-tumor, anti-HIV, and antioxidant. In the study, the density functional theory (DFT) calculations were performed for radical scavenging activity evaluation of a series of 3-styrylchromone derivatives. The reaction enthalpies related to the steps in the radical scavenging action mechanisms and several physicochemical descriptors such as global hardness, softness, and electronegativity were computed in gas phase and in water.