Ultrasonic assisted fabrication of first MoO3/copper complex bio-nanocomposite based on Sesbania sesban plant for green oxidation of alcohols

MoO₃ nanoparticles were obtained using Sesbania sesban. Novel Schiff base ligand and its nanocomplex of copper were synthesized under ultrasonic irradiation. First MoO₃/Copper Schiff base complex nanocomposite (NMCS) based on this natural plant was prepared and characterized by TEM, SEM, AFM, FT-IR, TGA, EDAX and elemental analysis. Then atom-efficient and selective oxidation of alcohols using hydrogen peroxide catalyzed by NMCS bio-nanocomposite under ultrasonic irradiation was reported. Structurally diverse set of alcohols was transformed into desired aldehyde and ketone products with high conversion and excellent selectivity under solvent free conditions. Products were isolated easily from green media, and the catalyst could be reused six times without any appreciable decrease in catalytic activity and selectivity.

Morphology control of colloidal silver bio-nanoparticles leaves shape using Sesbania sesban

Sesbania sesban extract solution (SSL) was used as a reducing and stabilizing agent for the synthesis of colloidal silver nanoparticles (AgNPs). The effect of time on the formation of nanoparticles was investigated using ultraviolet–visible spectroscopy. The AgNPs were synthesized after 25 min and characterized by high-resolution transmission electron microscopy, scanning electron microscopy (SEM) and X-ray diffraction (XRD). The average sizes of nanoparticles were estimated to be between 10 and 30 nm. The XRD of AgNPs, after 4 months, showed the stability of nanoparticles in air. The effects of silver nitrate concentrations and SSL concentrations on the morphology and size of synthesized AgNPs were observed by SEM.

A comparison of optical, electrochemical and self-assembling properties of two structural isomers based on 1,6- and 1,8-pyrenedione chromophores

Near-IR absorbing, self-assembling pyrene donor–acceptor chromophore with low reduction potentials.

Copper(i)-based oxidation of polycyclic aromatic hydrocarbons and product elucidation using vacuum ultraviolet spectroscopy and theoretical spectral calculations

Fluorinated 1,3,5-triazapentadienyl complexes of copper catalyze the oxidation PAHs to quinones using H₂O₂as an oxidant under mild conditions.

Photo-induced C–H bond activation of N,N′-dialkylethylenediamine upon aza-Michael addition to 1,8-pyrenedione: facile synthesis of fluorescent pyrene derivatives

We discovered a reaction between 1,8-pyrenedione and N,N′-dialkylethylenediamine to form highly fluorescent products, via aza-Michael addition followed by double C–H activation facilitated by visible light.