The ionic liquids N-methylpyridinium-2-carboxaldehyde Tf(2)N(-) and N-methylpyridinium-3-carboxaldehyde Tf(2)N(-) form readily-reversible covalent bonds with protic nucleophiles, creating all-liquid constitutionally dynamic materials.

Bio-based levulinic acid (LA), furfural (FF), and hydroxymethylfurfural (HMF) represent key chemical intermediates when biorefining biomass resources, i.e., either cellulose, glucose, hexoses, etc. (HMF/LA), or hemicellulose, xylose, pentose (FF). Despite their importance, online in situ detection by process analytical technologies (PATs), solubility, its temperature dependence are seldom avail...

Bionanocomposites have garnered wide interest from the packaging industry as a biocompatible alternative to non-biodegradable petroleum-based synthetic materials. This study presents simple and eco-friendly produce cellulose nanoparticles using protic ionic liquid, effects of their incorporation in cassava starch chitosan films are evaluated. Bionanocomposite prepared solvent casting method cha...

Abstract Hofmeister effects, and more generally specific ion are observed broadly in biological systems. However, there many cases where the series might not be followed complex systems, such as channels which can highly to a particular ion. An understanding of how ions from interact with proteinogenic amino acids will assist elucidation why some binding interactions may favoured over others. U...

We have systematically investigated combinations of anions and cations in a number of protic ionic liquids based on alkylamines and used ab initio methods to gain insight into the parameters determining their liquid range and their conductivity. A simple, almost linear, relation of the experimentally determined melting temperature with the calculated volume of the anion forming the ionic liquid...

The tautomeric conversion of pyridazin-3(2H)-one 1 into pyridazin-3-ol 2 has been theoretically studied using density functional theory (DFT) methods at the B3LYP/6-311++G** level. Two mechanisms have been considered for this process: (i) one in which the hydrogen is directly transferred through TS12; and (ii) another one in which a double hydrogen transfer takes place via TS1122 upon formation...

Objects of study: The cyclohexa-2,4-dienones 1, II and 111. Special methods of examination Low temperature spectroscopy and Mauser diagrams. Main results of investigation: Cyclo/seco isomeri7ation of a it*,nexcited reactant to a transient dienylketene, able to recyclize and/or to add a protic nucleophile, furnishes derivatives of a substituted hexadienoic acid in high yield. Alternatively, a cy...

The known procedures for the conversion of alkenylstannanes into the corresponding fluoroalkenes suffer from largely variable yields and a limited compatibility with functional groups; most notably, protodestannation becomes a serious issue whenever protic sites are present in the substrate. Outlined in this paper is a convenient alternative with a much improved application profile, which is la...

The influence of a highly oxygenated, polar protic reaction medium, that is, levulinic acid in 2-ethylhexanoic acid, on the dealumination of two zeolite-supported ruthenium catalysts, namely Ru/H-β and Ru/H-ZSM-5, has been investigated by 27 Al triple-quantum magic-angle spinning nuclear magnetic resonance spectroscopy (3QMAS NMR). Upon use of these catalysts in the hydrogenation of levulinic a...