Intercalates of vanadyl phosphate with formates and acetates of C1–C8 alcohols and dimethylesters of dicarboxylic acids C2–C6 were prepared by a displacement reaction of 2-propanol-intercalated VOPO4. The diffractograms of the intercalates show a series of sharp (0 0 l) reflections, (2 0 0) re...

Two new lithium vanadyl oxalatophosphites have been synthesized by hydrothermal treatment. The respective formula are Li2(VOHPO3)2C2O4 6H2O (1) and Li2(VOHPO3)2C2O4 4H2O (2). The structures of the compounds have been determined by single crystal X-ray diffraction. Compound 1 crystallizes in tric...

Two new gallium phosphate/phosphite-oxalates hybrid solids, {[H2dmpip][Ga2(HPO4)2(PO4)(C2O4)0.5]·H2O} (1) and [H2apm][Ga2(H2PO3)2(HPO3)2(C2O4)] (2), where dmpip = 2,6-dimethyl-piperazine and apm = N-(3-aminopropyl)morpholine, have been synthesized and structurally characterized. Both of compoun...

Electron paramagnetic resonance (EPR) studies are reported on vanadyl (VO2+) ions in potassium oxalate monohydrate (POM) single crystals at room temperature. The results indicate that the paramagnetic impurity takes up an interstitial site in the lattice. The angular variation of EPR spectra in ...

Electron paramagnetic resonance (EPR) and optical absorption studies of vanadyl ions in lithium hydrogen oxalate monohydrate single crystal and powder are reported at room temperature. Single crystal rotations in each of the three mutually orthogonal crystalline planes, ab∗, b∗c∗ and ac∗ indicat...

An ammonium vanadyl oxalatophosphite has been synthesized by hydrothermal treatment. The formula is (NH4)2(VOHPO3)2C2O4 2·9H2O (1). The crystal structure of the compound has been determined by single crystal X-ray diffraction and solid state Nuclear Magnetic Resonance spectroscopy (NMR). Compou...

Two new metal sulfate-oxalates, namely, (H4bapp)0.5·VO(SO4)(C2O4) (SCU-11) and H2depa⋅Mn2(SO4)(C2O4)2(H2O)⋅H2O (SCU-13), were prepared under solvent-free conditions, where bapp = 1,4-bis(3-aminopropyl)piperazine and depa = 3-(diethylamino)propylamine. SCU-11 has a chainlike structure containing...

The thermal decomposition of ammonium vanadyl oxalate supported on La2O3, MgO, SiO2, Al2O3, ZrO2, TiO2, SAPO-5, and ZSM-5 oxides in a dynamic atmosphere of dry air was compared by thermal gravimetric analysis (TG) and differential thermal analysis (DTA). The calcined catalysts were characterized...

The mechanisms of corrosion inhibition of hot-dip galvanized steel by vanadyl oxalate were studied using galvanic corrosion approach and XPS. The partial separation of electrode reactions was achieved using a split cell design. Injection of vanadyl oxalate solution to the cathode side of split c...

The synthesis and characterization of the first series of aryloxy full-substituted fluorenylidene open chain and bridged cyclotriphosphazene derivatives (13–18) are reported in this study. The synthetic route utilized includes the reaction of penta-substituted cyclotriphosphazenes (5, 7, 9) wit...

In the present work, the reaction of 2,2,4,4-tetra(anilino)-6,6-dichlorocyclotriphosphazene (4) and 2,2,4,4-tetra(2-naphthylamino)-6,6-dichlorocyclotriphosphazene (5) with 4,4′-(9-fluorenylidene)diphenol, FDP, (6) and 4,4′-(9-fluorenylidene)dianiline FDA (7) were studied in THF and new aniline...

The first series of 4,4′-(9-fluorenylidene)diphenol (FDP) (5) and 4,4′-(9-fluorenylidene)dianiline (FDA) (6) bridged and open chained cyclotetraphosphazene derivatives (15–23) have been synthesized. Their florescence and chemosensor properties are reported. Nucleophilic substitution reactions...

The hybrid DFT methods with 12 different basis sets were used for the computation of FOOF. Comparison with CCSD/6-311 + G* method was made. The availability and shortcoming of DFT methods for FOOF were pointed out. On that basis, the binary compounds of fluorine and oxygen (OnFm, n = 1–3, m = 1...

The equilibrium among dioxygen monofluoride, dioxygen difluoride, and oxygen has been studied in the temperature range 286 to 195 K. Forward and reverse reaction rate constants were determined. An activation energy of 13 kcal/mole was found for both reactions. The equilibrium constant in the mid...

The gas phase equilibrium between dioxygen difluorie, dioxygen monofluoride and oxygen has been studied in a very long pathlength FTIR cell at 286 K. The infrared vibrational intensity of dioxygen monofluoride was determined by analysis of the equilibrium data.

An efficient approach for the synthesis of biologically interesting N-aryl-2-iminocoumarins by a copper-catalyzed one-pot procedure has been developed by the reaction of 2-hydroxybenzaldehydes, malononitrile and arylboronic acids using triethylamine as a base in a bio-mass-derived green solvent ...

A simple method for synthesizing several 2-alkoxy-3-arylsulfinylmethylquinolines using an aza-Wittig type reaction of 3-(2-azidophenyl)-2-(arylsulfinylmethyl)propenoates, which were readily obtained from the Morita–Baylis–Hillman acetates of 2-azidobenzaldehydes, has been developed.

Eremophila bignoniiflora is a shrub distributed throughout inland northern and eastern Australia, and it has been used in several medicinal applications by some Australian Aboriginal people. In our continued search for anti-diabetic constituents from natural resources, the crude ethyl acetate ex...

Two new series of pyrazolo[3,4-d]pyrimidine bearing thiazolidinone moiety were designed and synthesized. The newly synthesized compounds were evaluated for their in vitro (COX-1 and COX-2) inhibitory assay. Compounds that showed promising COX-2 selectivity were further subjected to in vivo anti-...

A series of new pyrazolo[3,4-d]pyrimidine possessing 4-(1H-benzimidazol-2-yl)-phenylamine moiety at C4 position and primary as well as secondary amines at C6 position has been designed and synthesized. Their antitumor activities were evaluated against a panel of 60 human cancer cell lines at Nat...