A nickel hydroxide platform prepared on hydroxyl-enriched screen-printed carbon electrode for oxidative electrocatalysis

We report here the preparation of activation-free Ni electrode (i.e., eventually to the formation of NiOOH) through the enrichment of hydroxyl functional group via base-catalyzed hydrolysis reaction on “preanodized” screen...

Conformational changes in hydroxyl functional group upon hydration: the case study of Endo Fenchol

The hydration of endo-fenchol has been studied in the gas phase using a combination of Fourier transform microwave spectrometer coupled to a supersonic jet expansion and theoretical calculations in the...

Synthesis of Gold Nanoparticles Capped-Benzoic Acid Derivative Compounds (o-, m-, and p-Hydroxybenzoic Acid)

The effect of a hydroxyl functional group of the benzoic acid derivative compound, i.e. o-hydroxybenzoic acid, m-hydroxybenzoic acid, and p-hydroxybenzoic acid on the synthesis of AuNPs has been studied. It was revealed that the pH, heating time, the concentration of capping agent and the concentration of Au3+ affected the formation of AuNPs. We discovered that o-hydroxybenzoic acid possessed the highest stability, yet it needed the highest concentration of Au3+ and faster reaction time than p-hydroxybenzoic acid and slower than m-hydroxybenzoic acid. The stability was verified by means of UV-Vis spectrophotometer, XRD, TEM, Particle Size Analyzer (PSA), and Zeta Potential with an aging time of more than 5 months. We concluded that o-hydroxybenzoic acid acquired the most effective redox reaction instead of m-hydroxybenzoic acid and p-hydroxybenzoic acid, resulted in the smaller sized and unaggregated AuNPs. We also confirmed that the hydroxyl group of o-hydroxybenzoic acid, m-hydroxybenzoic acid and p-hydroxybenzoic acid is the functional group responsible for the reduction of Au3+ to Au0.

A novel copper catalyst containing a hydroxyl functional group: a facile strategy to prepare block copolymers of vinyl monomer and ε-caprolactone via tandem reverse ATRP and ROP

A facile hydroxyl-functionalized catalyst was first accessed to prepare block copolymers of vinyl and cyclic ester monomers via tandem reverse ATRP/ROP.

Functionalization of Starch for Macro-Initiator of Atomic Transfer Radical Polymerization (ATRP)

Using of petro-polymers such as polymethylmethacrylate, polypropylene and polyethylene in the world has been undergoing a critical problem due to significantly decreasing of petroleoum stock as monomer sources. Therefore reducing of the petro-polymer usage should be performed by using natural resources such as modified starches.This study reported addition of an acyl bromide compound to substitute hydroxyl groups on the starch obtains a macro initiator for graft-copolymerizing polymethylmethacrylate (PMMA) onto the functionalized starch as starch-g-PMMA through atomic transfer radical polymerization (ATRP) method. The starch activation through the substitution of the hydroxyl functional group creates ability of the starch to transfer a radical atom onto a petro-monomer such an alkylmethacrylate which furthermore polymerize into starch-g-PMMA at mild condition. This paper reported study of the starch activation describing about screening catalysts and acyl bromide compounds, optimizing process variables such as amount ratio of a selected acyl bromide compound to starch and temperature. The functionalized starchs were analysed by 13-CNMR, FTIR, titration and their morphology was observed by FE-SEM.

A Study on Synthesis and Testing of Polyols Using Soybean Oil and Castor Oil

The feasibility of methods of trans-esterification reactions for the preparation of polyols from unsaturated soybean oil and castor oil have shown in this study. The polyol products formed from soybean oil has primary alcohol functional group. For castor oil polyol, hydroxyl group of any chain of triglyceride is replaced by chlorine. Thus the polyol formed has two hydroxyl (-OH) groups. Polyol is identified from hydroxyl functional group using Fourier Transform Infrared Spectroscopy (FTIR), and characterized by acid value. It is seen that the synthesized polyols are useful in the treatment of processes, using polyols for the production of polyurethanes, and also manipulated to synthesize polyurethane with required properties.