Chitosan-sunflower meal biochar hydrogel incorporated with green synthesized NiO nanoparticles for enhanced catalytic reduction of anthropogenic water pollutants.

Anthropogenic activities have been one of the crucial driving factors for water pollution globally, thereby warranting a sustainable strategy for its redressal. In this study, we have developed a hydrogel-biochar nanocomposite for catalytic reduction of water pollutants. To begin with, green synthesis of nickel oxide nanoparticles (NiO NPs) was accomplished from waste kinnow peel extract via the environmentally benign microwave method.

A spectrophotometric study of impact of solvent, substituent and cross-conjugation in some 4-aminoantipyrine based Schiff bases.

The influences of substituent and solvent polarity on the electronic transition of seven different 4-aminoantipyrine based Schiff bases have been investigated in 14 solvents of different polarity. Reichardt'sE(30) scale has been used to propose a quantitative approach towards the relative stability of the electronic ground and excited state species. The Schiff bases can sense the polarity changes of the solvents and accordingly there appear three categories of solvents: non-polar, dipolar aprotic and polar protic.

Chromo-luminescent selective detection of fluoride ions by a copper(ii) bis(terpyridine) complex solution via a displacement approach.

Herein, for the first time, we have reported a copper(ii) bis(terpyridine) complex solution for instant 'naked eye' chromo-luminescent selective detection of fluoride ions in an acetonitrile medium at micromolar concentration. The copper complex [Cu(ii) (L)2] (NO3)2 [where L = 4'-(4-N,N'-dimethylaminophenyl)-2,2':6',2''-terpyridine] was characterized by mass spectroscopy and the terpyridine ligand by 1H NMR spectroscopy. The complex solution selectively discriminates F- ions from other anions such as AcO-, Br-, Cl-, CN-, H2PO4-, HSO4-, and I- in acetonitrile media via exceptional optical changes.

Selective detection of pyrophosphate anion by a simple Cd(II) based terpyridine complex.

A simple ratiometric terpyridine-Cd(ll) complex was synthesized by the treatment of CdCl with terpyridine ligand 4'-(4-N,N'-dimethylaminophenyl)-2,2':6',2″-terpyridine. The synthesized complex was found to act as a selective fluorescent chemosensor for pyrophosphate PO (PPi) over other anions like F, Cl, Br, CO, SO, AcO, NO, and HPO. Furthermore, the receptor probe was also successfully employed in HeLa cell for PPi detection, which indicates this can be used as a chemosensor for cells.