Energy-saving and cost-efficient reaction routes to prepare highly active catalysts for CO2 hydrogenation or solid oxide fuel cells (SOFCs) are enormously important. In this paper, we report a detailed study of dichromate salt [Fe(urea)6]3+, member the [M(urea)6]3+ complex family (M = Fe, Al, Mn, Cr, V, Ti) with oxidizing anions, which is promising precursor Cr-rich mixed chromium iron catalyst prepared at low temperature in phase. The single-crystal X-ray structure, various (infrared,...

Copper manganese oxide spinels and related (multiphase) materials with the formula CuxMn3−xO4 are active catalysts in a wide variety of industrially important processes due to their great diversity phase relations, metal ion valence/site distribution, chemical properties. In this review, we summarize preparation methods effects on composition, properties, catalytic properties various Cu/Mn ratios. The main summarized reactions oxidation carbon monoxide, nitrogen oxide, hydrogen sulfide...

We synthesized and structurally characterized the previously unknown [Co(NH3)5Cl](MnO4)2 complex as precursor of CoMn2O4. The was also deuterated, its FT-IR, far-IR, low-temperature Raman UV-VIS spectra were measured well. structure solved by single-crystal X-ray diffraction 3D-hydrogen bonds evaluated. N-H…O-Mn hydrogen act redox centers to initiate a solid-phase quasi-intramolecular reaction even at 120 °C involving Co(III) centers. product is an amorphous material, which transforms into...

Two monoclinic polymorphs of [Ag(NH3)2]MnO4 containing a unique coordination mode permanganate ions were prepared, and the high-temperature polymorph was used as precursor to synthesize pure AgMnO2. The hydrogen bonds between atoms ammonia detected by IR spectroscopy single-crystal X-ray diffraction. Under thermal decomposition, these induced solid-phase quasi-intramolecular redox reaction [Ag(NH3)2]+ cation MnO4– anion even before losing ligand or oxygen atom. decomposed into finely...

Easy recognition and numerical description of isostructurality; how different the similar structures can be; supramolecular aspects isostructurality.

The reaction of ammoniacal AgNO3 solution (or aq. [Ag(NH3)2]NO3) with NaClO4 resulted in [Ag(NH3)2]ClO4 (compound 1). Detailed spectroscopic (correlation analysis, IR, Raman, and UV) analyses were performed on [Ag(NH3)2]ClO4. temperature enthalpy phase change for compound 1 determined to be 225.7 K 103.04 kJ/mol, respectively. We found the thermal decomposition involves a solid-phase quasi-intramolecular redox between perchlorate anion ammonia ligand, resulting lower valence chlorine oxyacid...

Abstract We have developed a simple method to prepare nano-(ZrC 0.93 , ZrO 2- polymorphs)@carbon composites with graphite/amorphous carbon content and adjustable Zr/C ratio based on using multistep tube furnace plasma-assisted heat treatment of zirconium-loaded sulfonated styrene–divinylbenzene (STY-DVB) copolymers. Pre-pyrolysis STY-DVB ion exchangers 2 8 mass % DVB at temperatures between 1000 1400 °C for h produced nano-ZrO @C intermediates particle sizes ~ 30–60 nm no ZrC formation....

Research on new reaction routes and precursors to prepare catalysts for CO

[Carbonatotetraamminecobalt(III)] permanganate monohydrate was synthesized first in the metathesis reaction of [Co(NH3)4CO3]NO3 and NaMnO4 aqueous solution. Its thermal dehydration at 100 °C resulted phase-pure [Co(NH3)4CO3]MnO4 (compound 1). Compounds 1 2 (i.e., hydrated form) were studied with IR, far-IR, low-temperature Raman spectroscopies, their vibrational modes assigned. The lattice parameters determined by powder X-ray diffraction (PXRD) single crystal (SXRD) methods for triclinic...

[κ2-O,O′-Carbonatotetraamminecobalt(III)] iodide, or [Co(NH3)4CO3]I, named in this paper as compound 1, was prepared and characterized comprehensively with spectroscopic (IR, Raman UV) single-crystal X-ray diffraction methods. Compound 1 orthorhombic, isomorphous the analogous bromide. The four ammonia ligands carbonate anion were coordinated to central cobalt cation a distorted octahedral geometry. ion formed four-membered symmetric planar chelate ring. complex cations bound each other by...

Nine new (1-9) and two known (10, 11) jatrophane diterpenoids were isolated from the methanol extract of Euphorbia dulcis. The structure elucidation compounds was performed by means extensive spectroscopic analysis, including HRESIMS, 1D (1H, JMOD), 2D (HSQC, HMBC, 1H-1H-COSY, NOESY) NMR experiments. absolute configuration compound 1 determined single-crystal X-ray diffraction. electrophysiological effects 1-11 five (12-16) previously taurinensis investigated on stable transfected...

We synthesized and characterized (IR, Raman, UV, SXRD) hexaamminecobalt(III) dichloride permanganate, [Co(NH3)6]Cl2(MnO4) (compound 1) as the precursor of Co–Mn–spinel composites with atomic ratios Co:Mn = 1:1 1:3. The 3D−hydrogen bond network includes N–HO–Mn N–HCl interactions responsible for solid-phase redox reactions between permanganate anions ammonia ligands. temperature-limited thermal decomposition compound 1 under temperature boiling toluene (110 ∘C) resulted in formation...

We have developed an easy route to prepare (nano-ZrO2,nano-ZrCx)@C composites with varying ZrO2/ZrCx content. The process consists of preparing a zirconium-loaded, iminodiacetate-functionalized styrene-divinylbenzene (STY-DVB) copolymer, and its subsequent carbonization in tube furnace and/or thermal plasma reactor. Depending on the zirconium salt used (zirconyl chloride, zirconyl nitrate or (IV) sulfate) Zr loading, Zr-loaded resins resulted ZrO2@C pre-pyrolizates C molar ratios 5.8, 6.8...

Design of a chiral resolution process with thermodynamic control.

The resolution of racemic ibuprofen was studied by partial diastereomer salt formation. performed via two methods: with (+)-(R)-phenylethylamine as chiral agent and a mixture benzylamine. diastereomers unreacted enantiomers were separated supercritical fluid extraction carbon dioxide at 15 MPa 33 degrees C. influence the achiral benzylamine on efficiency varying concentrations structurally related amines in their mixtures, keeping sum molar ratio to constant 0.55 +/- 0.02. presence...

We prepared and characterized a high-t tetragonal polymorph of diamminesilver(I) sulfate (a = 8.6004(4) Å, c 6.2123(6) Å) (compound 1-HT). The phase transformation the low-temperature 1-LT) into high-temperature 1-HT) partly coincides with initial stage thermal decomposition 1-LT. Selecting appropriate conditions, we separated two processes determined standard heat formation LT (ΔH298 −1208.92 kJ/mol) enthalpy polymorphic (ΔHLT→HT 13.18 kJ/mol). XRD results showed that lattice constants...

Dysfunction of the androgen receptor (AR) signalling axis plays a pivotal role in development and progression prostate cancer (PCa). Steroidal non-steroidal AR antagonists can significantly improve survival PCa patients by blocking action endogenous ligand through binding to hormone preventing its activation. Herein, we report two synthetic strategies, each utilizing advantages microwave irradiation, modify A-ring natural 5α-dihydrotestosterone (DHT) with pyridine scaffolds. Treatment DHT...

Three octahedral iron(III) nitrate complexes with dimethylated urea ligand isomers, [hexakis(N,N’-dimethylurea-O)iron(III)] (compound 1), trans-[diaquatetrakis(N,N-dimethylurea-O)iron(III)] 2) and [hexakis(N,N-dimethylurea-O)iron(III)] trihydrate 3) were prepared characterized single crystal X-ray diffraction, IR, Raman UV-VIS methods. In compounds 1 3, six dimethylurea ligands coordinate to the central FeIII ion via oxygen in geometry are arranged a propeller-like manner, dividing complex...

A unique compound (compound 1) with structural features including an unprecedented tridentate-bridging coordination mode of permanganate ions and eight-coordinated (rhombohedral) κ1-chlorido tridentate permanganato ligand in a potassium complex containing polymer (CoIII(NH3)6]n[(K(κ1-Cl)2(μ2,2′,2″-(κ3-O,O′,O″-MnO4)2)n∞) isolated regular octahedral hexamminecobalt(III) cation was synthesized yield >90%. The structure found to be stabilized by mono bifurcated N-H∙∙∙Cl N-H∙∙∙O (bridging...

Infrared and Raman spectra of two solvatomorphs a new dimethylammonium polytungstate decakis(dimethylammonium) dihydrogendodecatungstate, (Me 2 NH )(H W 12 O 42 ) · n H ( = 10 or 11), were evaluated discussed. The assignment bands corresponding to the cationic anionic components as well water crystallization is presented. Deuteration has been used in interpretation spectra. cation molecules form network regular multifurcated hydrogen bonds, thus fraction N–H atoms are so strongly bound...

Flow batteries can play an important role as energy storage media in future electricity grids. Organic compounds, based on abundant elements, are appealing alternatives redox couples for flow batteries. The straightforward scalability, the independence of material sources, and potentially attractive price motivate researchers to investigate this technological area. Four different benzyl-morpholino hydroquinone derivatives were synthesized potential active species. Compounds bearing central...

Novel poly(dithiophosphate)s (PDTPs) were successfully synthesized under mild conditions without any additive in the presence of THF or toluene diluents at 60 °C by a direct, catalyst-free reaction between abundant phosphorus pentasulfide (P4S10) and glycols such as ethylene glycol (EG), 1,6-hexanediol (HD) poly(ethylene glycol) (PEG). GPC, FTIR, 1H 31P NMR analyses proved formation macromolecules with dithiophosphate coupling groups having P=S P-SH pendant functionalities. Surprisingly,...