A Report on Analysis of Formulated Pesticides for Quality Assessment

Pd supported on locust bean gum as reusable green catalyst for Heck and Sonogashira coupling reactions and 4‐nitroaniline reduction under ultrasound irradiation

“…The IR spectrum (Figure 2) of pure LBG shows the appearance of a broad band around 3336 cm −1 due to the stretching of the hydroxyl group. [ 17 ] The vibrational bands emerging at 2866–2949 cm −1 correspond to C‐H bonds. Likewise, a peak at 1729 cm −1 seems to come from the stretching vibrations of the carbonyl group.…”

“…Different supports have been proposed in the coupling reaction such as synthetic silica‐based supports, [ 9 ] metal oxides, [ 10 ] carbon nanotubes, [ 11 ] and ionic liquids. [ 12 ] However, different synthesis teams have examined the possibility of replacing these with more environmentally friendly natural supports such as cellulose, PLA, gum arabic, [ 13–15 ] hyperbranched polytriazoles, [ 16 ] guar gum, [ 17 ] pectin, [ 18 ] gelatin, [ 19 ] and pectin/gelatin. [ 20 ]…”

“…Likewise, these supports can act as palladium reducer that never requires the use of ligand. [ 15–20 ] Gelatin‐supported Pd nanoparticles, for example, have been reported by Ghaderi's team [ 11 ] in Sonogashira coupling reaction using various iodides, bromides, aryl chlorides, and heteroaryl halides with phenylacetylene without copper and without ligand. The reactions were carried out at 100°C in molten tetrabutylammonium bromide (TBAB) or polyethylene.…”

“…Furthermore, it has been used as a stabilizing agent for palladium nanoparticles synthesis. The catalytic efficiency of these particles was examined by Anjum et al [ 17 ] in the hydrogenation reaction of 4‐nitrophenol. The obtained results proved that particles constitute a remarkably effective catalyst for the reduction of 4‐nitrophenol.…”

Guar gum assisted synthesis of high‐quality silver nanoplates and their polyimide matrix nanocomposites for electromagnetic interference shielding applications

“…The polymer due to its non‐toxicity, biodegradability, film‐foaming capability, mild reducing power, and good surface properties has got special attention in the synthesis of nanoparticles and their composites 25,26 . Oxygen moieties in its structure are reported to reduce and stabilize metal nanoparticles in aqueous media 26–31 . Vanamudan et al 32 showed that the polymer reduced and stabilized silver precursor salt into spherical silver nanoparticles.…”