Friedel–Crafts synthesis of triarylmethanes over 3-methyl-1-sulfonic acid imidazolium tetrachloroaluminate under green conditions:In this work, Friedel–Crafts (FC) alkylation of various arenes with aromatic aldehydes catalyzed by 3-methyl-1-sulfonic acid imidazoliumtetrachloroaluminate {[Msim]AlCl4}, as a green catalyst, to prepare triarylmethanes (TAMs) has been carried out. Some aromatic alde...

Total lipid contents of green (Chlorella pyrenoidosa, C), red (Porphyra tenera, N; Palmaria palmata, D), and brown (Laminaria japonica, K; Eisenia bicyclis, A; Undaria pinnatifida, W, WI; Hizikia fusiformis, H) commercial edible algal and cyanobacterial (Spirulina platensis, S) products, and autotrophically cultivated samples of the green microalga Chlorella kessleri (CK) and the cyanobacterium...

Triplet–triplet annihilation photon upconversion (TTA-UC) of an organic molecular dye pair, 2,3,7,8,12,13,17,18-octaethyl-21H,23H-porphyrin platinum(II) (PtOEP) and 1,3,6,8-tetraphenylpyrene (TPPy), has been studied in a wide range green solvents (alcohols, esters, carbonates, ketones, aromatics, ethers, dipolar aprotic). UC is important for the study energy-transfer reactions where solvent pla...

Polyethylene glycol (PEG) is an industrial commodity produced for applications foremost in the medial and personal care business. This review focuses on much less explored application of using PEG as a chemical solvent. highlights some successful synthesis strategies to illustrate advantages environmentally friendly reaction medium. These include its ability (a) dissolve wide range chemicals in...

BACKGROUND Mechano heterocyclic chemistry (MCH) is a recent quickly growing technique in the synthesis of heterocycles and draws the attention of heterocyclic chemists towards the uses of grindstone technique in a solvent free green efficient synthesis of many heterocyclic systems. On the other hand, multicomponent approach has opened the door for the rapid and efficient one-step procedures to ...

Solvents are widely recognized to be of great environmental concern. The reduction of their use is one of the most important aims of green chemistry. In addition to this, the appropriate selection of solvent for a process can greatly improve the sustainability of a chemical production process. There has also been extensive research into the application of so-called green solvents, such as ionic...

In the present work, we have planned a new magnetically recoverable nanocatalyst. The obtained nanocatalyst designated as Fe3O4@SiO2@DOPisatin-Ni (II) was characterized by FTIR, XRD, SEM, EDAX, VSM, AAS and TGA techniques. It was found that Fe3O4@SiO2@DOPisatin-Ni (II) successfully catalyses the synthesis of 2,3-dihydroquinazolin-4(1H)-ones, polyhydroquinoline and 5-substituted 1H-tetrazoles in...

A simple, green synthesis of N-alkyl-3-acetyl-2-methylpyrrole derivatives using ZnO nanoparticles from the three component reaction of aliphatic amines, acetylacetone (as a 1,3-dicarbonyl compound) and α-haloketones under solvent-free condition is described.

The fluorophore in green fluorescent protein (GFP) is localized in a highly constrained environment, protected from the bulk solvent by the barrel-shaped protein matrix. We have used the wavelength-selective fluorescence approach (red edge excitation shift, REES) to monitor solvent (environment) dynamics around the fluorophore in enhanced green fluorescent protein (EGFP) under various condition...

a highly efficient procedure for the synthesis of 1,8-dioxo-octahydroxanthenes under mild, green and solvent-free condition by using hosa as a dual role catalyst is described. this is the first report of catalytic activity of hosa.