We report the discovery of the hydrotropic properties of a recyclable aromatic acid, p-toluenesulfonic acid (p-TsOH), for potentially low-cost and efficient fractionation of wood through rapid and near-complete dissolution of lignin. Approximately 90% of poplar wood (NE222) lignin can be dissolved at 80°C in 20 min. Equivalent delignification using known hydrotropes, such as aromatic salts, can...

Abstract A series of aryl sulfonic acids were tested as catalysts for acid hydrolysis occurring at the surface poly(ethylene) terephthalate (PET) particles. Specifically, p‐toluenesulfonic monohydrate (PTSA), 2‐naphthalenesulfonic (2‐NSA), and 1,5‐naphthalenedisulfonic tetrahydrate (1,5‐NDSA) chosen to provide active groups varying hydrophobic functionality. The effect catalyst concentration re...

The (trans)esterification reaction of bacterial biopolymers with a selected bioactive compound with a hydroxyl group was applied as a convenient method for obtaining conjugates of such compound. Tyrosol, a naturally occurring phenolic compound, was selected as a model of a bioactive compound with a hydroxyl group. Selected biodegradable polyester and polyamide, poly(3-hydroxybutyrate-co-4-hydro...

Quaternary ammonium geminal Brønsted acid ionic liquids (GBAILs) based on zwitterionic 1,2-bis[N-methyl-N-(3-sulfopropyl)-alkylammonium]ethane (where the carbon number of the alkyl chain is 4, 8, 10, 12, 14, 16, or 18) and p-toluenesulfonic acid monohydrate were synthesized. The catalytic ionic liquids were applied in three-component Mannich reactions with an aldehyde, ketone, and amine at 25 °...

A dicobaloxime in which monomeric Co(III) units are linked by an octamethylene bis(glyoxime) catalyzes the reduction of protons from p-toluenesulfonic acid as evidenced by electrocatalytic waves at -0.4 V vs. the saturated calomel electrode (SCE) in acetonitrile solutions. Rates of hydrogen evolution were determined from catalytic current peak heights (k(app) = 1100 ± 70 M(-1) s(-1)). Electroch...

The ability to control the micelle size of poly(lactic acid) and poly(ethylene glycol) (PLA–PEG) block copolymers is important for controlling their circulation in blood cell recognition, drug release and therapeutic effects. We successfully controlled the micelle size by changing the block number of copolymers (multiblock index). PLA–PEG multiblock copolymers with multiblock indexes ranging fr...

As a way to valorise glycerol, the main by-product of biodiesel, this study is focused on production esters p-methoxycinnamic acid and glycerol. These can replace hazardous octylmethoxycinnamate in cosmetic industry, which thought act as an endocrine disruptor interfere with thyroid function. Several sulfonated mesoporous catalysts, without endcapping, were easily synthetized using several alco...

Herein we present a mild, simple and environmentally friendly diazotization protocol of aromatic heteroaromatic anilines into stable diazonium salts that surpass previously reported procedures. The reaction proceeds with tert -butyl nitrite in the presence an equimolar amount or small excesses p -toluenesulfonic acid ethyl acetate, at room temperature. o -Phenylenediamines yield benzotriazolium...