The identification of the thermochemolysis products (in the presence of tetramethylammonium hydroxide, TMAH) of carbohydrates is presented. Analysis was carried out using on-line flash pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) and off-line flash (vacuum) pyrolysis followed by GC/...

Publisher SummaryThis chapter discusses the synthesis of pure tetramethylammonium peroxynitrite. The synthesis is based on a biomimetic strategy in which tetramethylammonium superoxide is reacted directly with nitric oxide. The use of ammonia as the solvent and tetramethylammonium superoxide as ...

Thermally assisted hydrolysis and methylation (THM) with tetramethylammonium hydroxide (TMAH) was performed on spruce milled wood lignin (MWL) in order to investigate THM parameters. The objective was the maximization of information on lignin structure. The main emphasis was laid on the formatio...

This paper addresses the identification of (E)-5-formyl-2,3,3′,4′-tetramethoxystilbene (11), a major tetramethylammonium hydroxide (TMAH) thermochemolysis product of guaiacyl dehydrogenation polymer (DHP). It was carried out by comparing the mass spectral data and chromatographic behavior with...

Trace metals have negative effects on the oxidative stability of edible oils and they are important because of possibility for oils characterisation. A single-step procedure for trace elemental analysis of edible oils is presented. To this aim, a solubilisation with tetramethylammonium hydroxide...

A new solid electrolyte, tetramethylammonium hydroxide pentahydrate, was applied to a nickel oxyhydroxide-metal hydride (NiOOH/MH) battery and a manganese dioxide-metal hydride (MnO2/MH) battery, which were prepared by impregnating the melt of the solid electrolyte into the battery components. T...

A clathrate hydrate, tetramethylammonium hydroxide pentahydrate was found to be a fast “proton” or “hydroxide ion” conductor, about 5×10−3Scm−1, for the room temperature phase (phase III). The high temperature phase (phase I) has body-centered cubic symmetry and high conductivity comparable...

Preconcentration and separation with solvent extraction of Cu(II) from aqueous solution using N,N′-bis(2-hydroxy-5-bromo-benzyl)1,2 diaminopropane (H2L) as the new extractant has been studied. Separation of Cu(II) from other metal ions such as Cd(II), Ni(II), Zn(II), Pb(II), Cr(III), Co(II) and...

A series of vanadium(V) complexes with unsymmetrical tridentate Schiff base ligands, obtained by the single condensation of R(−)-1,2-diaminopropane with salicylaldehyde and its derivatives, 2-hydroxy-1-naphthaldehyde, 2-hydroxyacetophenone, 1-hydroxy-2-acetonaphthone and 2-hydroxybenzophenone, w...

A novel schiff base H2L derived from simple condensation of 2-hydroxy-6-isopropyl-3-methyl benzaldehyde and 1,2-diaminopropane in 2:1 M ratio and its [MnL], [CoL] and [NiL]2 complexes have been prepared and characterized by spectroscopic technique, elemental analysis, SEM-EDX analysis, and cycli...

Violet crystals of {[Cu(pn)2]2[Pt(CN)4]}[Pt(CN)4]·2H2O (1, pn=1,2-diaminopropane) and blue crystals of [Cu(pn)Pt(CN)4]n·nH2O (2) were prepared under hydrothermal conditions and characterized using elemental analysis, IR and UV–vis spectroscopy and by X-ray crystal structure analysis. Differen...

The molecular structure and hydrogen bonding in liquid 1,2-diaminopropane (12DAP) and 1,3-diaminopropane (13DAP) have been studied as a function of temperature and water content by using near-infrared (NIR) spectroscopy and density functional theory (DFT) calculations. Detailed analysis of the e...

The present work describes a selective, rapid and economical spectrophotometric method for the determination of molybdenum using N,N′-bis(2-hydroxy-5-bromo-benzyl)1,2 diaminopropane. Molybdenum(VI) reacts with N,N′-bis(2-hydroxy-5-bromo-benzyl)1,2 diaminopropane to form a stable 1:1 yellow com...

The vapour pressures of {ethanediamine (EDA) + water}, {1,2-diaminopropane (1,2-DAP) + water}, {1,3-diaminopropane (1,3-DAP) + water} or {1,4-diaminobutane (1,4-DAB) + water} binary mixtures, and of pure EDA, 1,2-DAP, 1,3-DAP, 1,4-DAB, and water components were measured by means of two static de...

Three soft drug analogs and a metabolite of methatropine based on phenylsuccinic structural moiety were synthesized and tested for activity. In an in vivo assay, the soft drugs were found to be two orders of magnitude less potent than methatropine while the carboxylate metabolite was found to be...

Phenylsuccinic acid (PSA) and α-cyclohexyl-mandelic acid (α-CHMA) are dicarboxylic acid and monatomic acid, respectively, and there is effect of solution pH on multistage extraction efficiency for separation of PSA and α-CHMA enantiomers. Enantioselective liquid–liquid extraction (ELLE) of P...

A novel method of aqueous two-phase system (ATPS)-based biphasic recognition chiral extraction has been developed to separate phenylsuccinic acid (PSA) enantiomers. The phase behaviors of ethanol/ammonium sulfate ATPS including phase diagrams, phase volume ratios and phase compositions were stud...

The surface geometry of (RS)-phenylsuccinic acid molecule was studied by analysis of the SERS spectra of aromatic dicarboxylic acid adsorbed on silver colloid surfaces. For a reliable analysis of the SERS spectrum, we also performed density functional theoretical calculations. The SERS spectral ...

A novel aqueous two-phase system (ATPS) composed of β-cyclodextrin (β-CD) derivative and acetone was developed for enantioselective extraction of racemic phenylsuccinic acid (PSA). Binodal curves, tie-lines, and critical points for the investigated ATPS were determined and the experimental tie...

High speed counter-current chromatography (HSCCC) was successfully applied to resolution of phenylsuccinic acid (PSA) with hydroxypropyl-β-cyclodextrin (HP-β-CD) as chiral selector (CS). The two-phase solvent system composed of n-hexane–methyl tert-butyl ether–0.1 mol L−1 phosphate buffer so...