Three series of zeolite catalysts Co all-silica and Al-containing zeolites beta were prepared for use in the selective oxidative dehydrogenation propane to propylene. Two by a two-step postsynthesis method at pH = 2.5 3.0–9.0, respectively, which allows incorporation cobalt into SiBEA form isolated framework pseudo-tetrahedral Co(II) species. The ions vacant T-atom sites their reaction with sil...

Synthesis and structure elucidation of several series new hydrazones containing 1,2,4-triazine-5-one core their antioxidant activity are presented. The target compounds have been synthesized via interaction either 4-amino-6-( tert -butyl)-3-hydrazinyl-1,2,4-triazin-5(4 H )-one or 6-( -butyl)-3-hydrazinyl-1,2,4-triazin-5(2 with a wide range carbonyl group in moderate to high yields. Molecular st...

Nanosized ZSM-5 (<100 nm) zeolites with high acidity (Si/Al < 15) can bring distinct advantages as catalysts for obtaining aromatics in C1 chemistry. Synthesis of such nanosized a cheap and scalable manner remains challenge. Herein, (20–50 = 11) was hydrothermally synthesized yield using p-phenylenedimethylene-bis(tripropylammonium) dichloride (Pr3N-benzyl-NPr3) the sole organic structure-direc...

IMPORTANCE OF THE FIELD Conventional metabolism studies in early stages of drug development include in vitro tests, often based on hepatic cells and cell extracts, as well as in vivo tests on the basis of animal models. Complementary to these existing techniques, the electrochemical study of oxidative metabolism reactions is gaining increasing attention. Electrochemistry (EC) allows the fast de...

In the present work, first data on catalytic activity of d-metal complexes petroleum porphyrins obtained via two-stage re-metallization (acid demetallization with subsequent metalation) high-purity vanadyl are presented. During acid porphyrins, highest yield (49%) and spectral purity free petroporphyrin bases were achieved concentrated sulfuric a diluted solution in chloroform. series divalent ...

This study compared oxidative delignification of birch kraft pulp fibers to from acid hydrotropic fractionation (AHF) using p-toluenesulfonic (p-TsOH). Under oxygen at 20% consistency, AHF pulps with lower hemicellulose content showed higher than similar lignin despite its residual (cellulosic enzymatic lignin, CEL) being less reactive fewer ?-O-4 ether aryl linkages based on 2D13C-1H nuclear m...

The azotetrazole moiety represents a great platform for energetic materials, it offers planar and nitrogen-rich backbone, combined with high heat of formation, which easily can be functionalized tuned. Herein, we start from sodium 5-aminotetrazolate obtain two isomers by substitution reaction 2-chloroethanol. Azidoethyl nitratoethyl substituted azo- tetrazoles were finally synthesized oxidative...

In synthetic method development, the most rewarding path is seldom a straight line. While our initial entry into pentafluorosulfanyl (SF5) chemistry did not go according to plan (due inaccessibility of reagents such as SF5Cl at time), “detour” led us establish mild and inexpensive oxidative fluorination conditions that made aryl-SF5 compound synthesis more accessible. The involved use potassium...