Synthesis and optical, thermal, electrochemical, photoelectrical properties of new phenothiazine-based hydrazones with reactive vinyl groups are reported. The synthesized compounds were characterized by 1H NMR, IR, UV/VIS, fluorescence, mass spectrometries, and cyclic voltammetry. The oxidation ...

A series of five novel sky-blue to green emitting push-pull fluorophores based on phenothiazine donor and 1,3,4-oxadiazole acceptor were synthesized and characterized. Their doped thin films (5 wt% in PMMA) showed high quantum efficiencies (ФPL) from 0.63 to 0.77. These fluorophores also underw...

A series of racemic 10-alkyl-3-formyl-10H-phenothiazine-5-oxides (±)-2a–h were subjected to biotransformation with baker's yeast resulting in optically active aldehydes (+)-2a–h and alcohols (−)-3a–h in moderate enantiomeric excess. The racemic 10-alkyl-3-hydroxymethyl-10H-phenothiazine...

The photo-physical and electroluminescent properties of five PPV-type conjugated polymers containing phenothiazine and phenothiazine-5-oxide moieties were studied by UV–vis, PL and EL methods. The polymers showed PL maxima in the range 546-553 nm in solution and is 574–589 nm in solid. Red shi...

Improvement in the stability of the 9-chloroacridine stock solution has been made in the colorimetric method for primary aromatic amines based on the reaction between the acridine and an amine. The improved procedure has been applied to some local anesthetics and local anesthetic mixtures. It ha...

Sulfonamides and local anesthetics containing a primary aromatic amino group react with 9-chloroacridine to yield aminoacridine hydrochlorides. The formation of these derivatives results in quenching of fluorescence of the 9-chloroacridine reagent solution. Monitoring the fluorescence at activat...

A colorimetric procedure based on the reaction between 9-chloroacridine and primary aromatic amines has been applied to some sulfonamides and sulfonamide mixtures. It has been found to be comparable in sensitivity to other sulfonamide determinations, particularly the popular diazotization-coupli...

A colorimetric method based on the interaction between isoniazid and 9-chloroacridine was developed. Analytical solutions are shaken for 30 min at 50°, and the absorbance is measured at 500 nm. The procedure is sensitive for isoniazid in the 10−5M range. The method was applied to the analysis o...

Methyl-2-fluoro-3-(N-benzoylamino)-3-phenylpropanoate 2 and 3, fluorine analogs of the C-13 side chain of taxol, were synthesized by electrophilic fluorination of the dianion of methyl (R)-(−)-(N-benzoyl)-3-amino-3-phenylpropanoale (4).

A wide spectrum of commercially available lipases and microbial whole cells catalysts were tested for biotransformations of 2-hydroxy-2-(ethoxyphenylphosphinyl)acetic acid 1 and its butyryl ester. The best results were achieved for biocatalytic hydrolysis of ester: 2-butyryloxy-2-(ethoxyphenylph...

A series of novel substituted uracil-1′(N)-acetic acid esters (6–20) of camptothecins (CPTs) were synthesized by the acylation method. These new compounds were evaluated for in vitro antitumor activity against tumor cell lines, A549, Bel7402, BGC-823, HCT-8 and A2780. In vitro results showed t...

Solutions containing naproxen, its methyl ester and Cu2+, or naphthalene acetic acid, its methyl ester and Cu2+ was analyzed by using electrospray ionization mass spectrometry. As a result of interaction between Cu2+ and aromatic system (Cu2+–π interaction), the respective molecular ions were ...

In this research, the removal of acetic acid from aqueous solutions using bulk ionic liquid membrane (BILM) containing tributyl phosphate (TBP) was investigated. The effects of various parameters in BILM like the stirring, the initial acetic acid concentration in feed phase, the extractant (TBP)...

Yeast Sir2 is an NAD-dependent histone deacetylase related to oxidative stress and aging. In a previous study, we showed that Sir2 is regulated by S-glutathionylation of key cysteine residues located at the catalytic domain. Mutation of these residues results in strains with increased resistance...

The tautomeric and conformational properties of a new tetrazole derivative are studied in a combined approach that includes the analysis of the experimental vibrational data together with theoretical calculation methods, especially in terms of natural bond orbital (NBO) population analysis. More...

A palladium-catalyzed Heck diarylation of terminal olefins under ligand-free conditions in acetic acid is described. This procedure allows double arylation of terminal olefins affording trisubstituted olefins in good to excellent yields. The methodology is applicable to the coupling of both elec...

Bacteria were isolated from necrotic apple and pear tree tissue and from dead wood in Germany and Austria as well as from pear tree exudate in China. They were selected for growth at 37 °C, screened for levan production and then characterized as Gram-negative, facultatively anaerobic rods. Nucl...

The aim of this study was to select starter cultures by showing correlation between the volatiles and the starter cultures used during fermentation with the goal of producing a standard and desirable tarhana. This traditional fermented cereal product is produced with fermentation of a dough prep...

This review focuses on the introduction and early development, in solution, of phase-transfer catalyzed (PTC) reactions to afford racemic or enantioenriched natural and unnatural amino acids. To form monosubstituted amino acids alkylation reactions are performed on the benzophenone Schiff base o...

The synthesis, spectral characterization and luminescent properties of palladium(II) complexes with 3-(2-pyridyl)-1H-1,2,4-triazole-5-acetic acid ethyl ester (HL) have been described. The compounds Pd(L)2 and Pd4(L)4Cl4·2DMF were prepared by refluxing Pd(HL)Cl2 in DMF. The pathways of their for...