In this study, synthesis of bimetallic (Co, Mn, and Ni) complexes of salicylic acid (L1) and 1,2 dihydroxybenzene (L2) based on titanium(IV) were investigated, then the samples were decomposed by thermal method to obtain MxTiyOz nanoparticles (M = Ni, Co, and Mn).The samples in complexes mode we...

A series of titanium-aluminum binary oxides are prepared through co-precipitation of metal salts with polyvinylpyrrolidone (PVP) in alkaline solution, along with dehydration. Most of synthetic oxides are composed of micro- or nano-sized blocks, while one of them shows an interesting two-dimensio...

Three series of 4-hydroxy-N′-[benzylidene/1-phenylethylidene]-2-H/methyl/benzyl-1,2-benzothiazine-3-carbohydrazide 1,1-dioxides (9–11)a-l were synthesized and unraveled to be highly potent dual inhibitors of monoamine oxidases (MAO-A and MAO-B). All the examined compounds demonstrated IC50 val...

From the reaction of 1,2-bis-(4-methylphenyl)ethane-1,2-dione with formamide, symmetrically substituted 4,5-bis-(4-methylphenyl)-1H-imidazole (1) was synthesised and further reacted with p-benzyl substituted halides to give the symmetrically substituted N-heterocyclic carbene (NHC) precursors 1a...

When benzylic and allylic alcohols were treated with enol acetate in the presence of a catalytic amount of a rhenium complex, ReBr(CO)5, the carbon-carbon bond formation of the alcohols and enol acetate smoothly proceeded to give the corresponding ketones and aldehyde in moderate to good yields....

Polarization energy calculations have been performed for the low-temperature polymorph of the α-sexithiophene crystal by means of the Fourier transform method in the submolecule approximation. The sensitivity of the results to the changes of the dielectric tensor anisotropy has been tested, sin...

We report on the α-sexithiophene sub-monolayer growth with supersonic molecular beam deposition by investigating how the kinetic energy of the impinging molecules influences the growth on substrates with different surface wettabilities and temperatures. The results show that the energy of the i...

The interface properties of α-sexithiophene (α-6T) and polycrystalline, atomically clean and contaminated palladium have been studied by combined core level X-ray photoemission spectroscopy and valence band ultraviolet photoemission spectroscopy. Our data indicate for the atomically clean pall...

Absorption and emission spectra, differential pulse voltammetry (DPV), and X-ray crystal structure of perfluoro-α-sexithiophene (PF-6T) are described. Emission maxima of PF-6T were observed at 594 nm in solid state and at 471 nm in CHCl3. The DPV of PF-6T showed two reduction peaks at −1.86 and...

We have investigated the valence electronic states of α-sexithiophene (α-6T) on three passivated Si(0 0 1) surfaces, oxidized Si(0 0 1), water-adsorbed Si(0 0 1) and ethylene-adsorbed Si(0 0 1), using ultraviolet photoelectron spectroscopy (UPS). At a thickness of α-6T layer below 0.5 nm, cle...

In this study, we used photo electron emission microscopy (PEEM) to investigate the growth of α-sexithiophene (α-6T) on Ag(111) surfaces. The experiments were carried out with linearly polarized ultraviolet-light (Hg lamp with hν=4.9 eV) in order to probe the alignment of the molecules on the...

Management of α-sexithiophene (6T) molecular orientation is a key issue to improve the performance of organic photovoltaic (OPV) devices based on 6T thin films, which act as p-type semiconductor layers; however, it is difficult to produce 6T layers with the molecules lying on smooth surfaces, i...

Oriented films of poly(9,9-dioctylfluorene) (PFO) are produced by the friction transfer technique and exposed to saturated toluene vapor for formation of the metastable β-phase PFO. To obtain white polarized emission, the orange-emitting α-sexithiophene (6T) is deposited on top of these blue-e...

Organic molecular beam grown α-sexithiophene (α-6T) forms nanostructured thin films on buckminsterfullerene (C60) thin film layers. At substrate temperatures of 300 K during growth a rough continuous film is observed, which develops to larger elongated islands and dendritic- as well as needle-...

The surface potential difference between the first and second layer of α-sexithiophene (6T) films on silane passivated SiO2 is observed using Kelvin Probe Force Microscopy. The relative surface potential between the first two layers changes sign depending on whether the films are grown at 70 °...

Methyl 2-(4-hydroxybutyl)-4-oxo-4H-1-benzopyran-3-carboxylate 6 is transformed into the spiroacetals 13 and 14 (ratio 5:1) via treatment with iodomethane/potassium carbonate, the process involving sequential intramolecular conjugate addition and enolate alkylation. The 2,3-epoxide 7 derived from...

4H-1-Benzopyran-4--thio)ie (1) reacted smoothly with nitrilimines (3a-e) to afford regioselectiue cycloadducts (4a-X) in good yields. In contrast, benzonitrile oxide (6) and aldonitrones (7a-d) reacted preferentially at the thione function. The unstable cycloadduct (B) or (9) ruptured to give as...

2,3-Dihydro-5-hydroxy-2-methyl-4H-1-benzopyran-4-one, was isolated from 3 week old rice cultures of Phialophora gregata, a soybean pathogen, grown at 25°C. This material in repeated bioassays prevented callus formation on soybean hypocotyl sections at 100 and 200 mg/ml callus culture medium. Th...

The Claisen rearrangements of 7-(1,1-dimethyl-3-prop-2-ynyloxy) derivatives of 7-hydroxy-8-methyl-3-phenyl-[4H]-1- benzopyran-4-one1 (1), 2,8-dimethyl-7-hydroxy-3-phenyl-[4H]-1-benzopyran-4-one1 (5), 8-(prop-2-enyl)-7- hydroxy-3-phenyl-[4H]-1-benzopyran-4-one2 (8), 8-(1-phenyl-2-propenyl)-7-hydr...

SummaryA series of 2-[2-alkyl-1H-benzimidazol-5(6)-yl]-4H-1-benzopyran-4-one analogues 7a-7e was synthesized by the reaction with 3′,4′-diaminoflavone and aliphatic carboxylic acids. 3′,4′-Diaminoflavone 6 was prepared via the reduction of 2-(4-amino-3-nitrophenyl)-4H-1-benzopyran-4-one 5a. ...