Copper vanadates are considered as one of the most promising photoanode materials for photoelectrochemical (PEC) water splitting owing to their narrow bandgap, stoichiometry-dependent optical and electrical properties, and high stability. However, for technological applications, it is imperative...

(±)-Marmin (1a) and its cis isomer (1b) have been synthesized from 7-neranyloxycoumarin (10a) and 7-neryloxycoumarin (10b), respectively, by way of the corresponding terminal epoxides 2a and 2a. The geometrically and positionally specific route confirms the structure and, in particular, the iro...

ObjectiveTo investigate the relaxation mechanims of marmin on epithelium of guinea pig isolated trachea smooth muscle (TSM).

Asymmetric biohydrolysis of trisubstituted terpenoid oxiranes (rac-1a–rac-3a) was accomplished by employing the epoxide hydrolase activity Rhodococcus and Streptomyces spp. Depending on the biocatalyst, the biohydrolysis proceeded in an enantio-convergent fashion and gave the corresponding vic-...

Herein it is provided an efficient, environmentally friendly and one-pot procedure for the synthesis of a library of new and diversely substituted 1,3-thiazolidin-4-ones in short reaction times and good yields through a solvent-, catalyst- and desiccant-free three-component process. Reactions pr...

A new class of nitrosocarbonyl precursors, O-substituted hydroxamic acids with pyrazolone leaving groups (OHPY), is described. These compounds generate nitrosocarbonyl intermediates, which upon hydrolysis release nitroxyl (azanone, HNO) under physiologically relevant conditions. Pyrazolones have...

A convenient method for the synthesis of antipyrine, pyrazolopyrimidine and pyrazolopyridine thioglycosides was developed. This study reports a novel and efficient method for the synthesis of thioglycosides of a novel class of 4-aminoantipyrines 6a,b; 13a,b and their corresponding pyrazolopyrimi...

A novel series Y-shaped π-expanded imidazole based chromophores was designed and synthesized. The series contains thirteen 2-aryl-4,5-bis[2-(aryl)vinyl)]-1H-imidazoles (6a–6m), which were characterized by spectroscopic analysis. The structures of compounds 6d and 6j were also confirmed by X-ra...

A new para-linked diether-diamine, 9,9-bis{4-[2-(4,5-diphenylimidazol-2-yl)-4-aminophenoxy] phenyl}fluorene (III), bearing fluorene–bisphenol and two ortho-linked diaryl-substituted imidazole rings were synthesized by the catalytic reduction of the nitro groups of compound (II), 9,9-bis{4-[2-(4...

The IR spectra of KAu(CN)2 and NaAu(CN)2 in 1-methyl-2-pyrrolidinone solution, the Raman spectra of KAu(CN)2 and NaAu(CN)2 in aqueous solution and the IR and Raman spectra of polycrystalline KAu(CN)2, NaAu(CN)2, NH4Au(CN)2, LiAu(CN)2, TlAu(CN)2 and AgAu(CN)2, are reported. A complete vibrational...

Several potential extractants were considered as the active compound in supported liquid membranes (SLMs) for the selective extraction of dicyanoaurate(I) from alkaline proces solutions. SLM systems containing primary, secondary, tertiary, and quaternary amines, in which the extraction and back-...

The salts – yellow [Cr(NH3)6][Ag(CN)2]3 · 2H2O, red [Co(NH3)6][Ag(CN)2]3 · 2H2O, red [Co(NH3)6][Au(CN)2]3 · 2H2O, pale yellow [Ru(NH3)6][Ag(CN)2]3 · 2H2O, yellow K[Cr(NH3)6]2[Au(CN)2]7 · 4H2O, and colorless [(μ2-NH2)2Pt2(NH3)10][Au(CN)2]6 · 5.5{OS(CH3)2} · 0.5H2O – have been prepared b...

Three 1-D transition metal–nitronyl nitroxide radical complexes with dicyanoaurate(I) bridges, [M(NIT3py)2][Au(CN)2]2 [NIT3py = 2-(3′-pyridyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide, M = Mn, Co, Zn (1–3)], were synthesized and structurally characterized. Three compounds are all isostru...

Electroless gold deposition onto Ni-P substrates from a bath containing dicyanoaurate ions and sodium hypophosphite as a reducing agent has been studied and the mechanism of this process has been proposed. A number of simultaneous reactions occur in the bath studied. One of them is the gold ceme...

Both the adsorption of Au-containing species on a polycrystalline gold electrode in alkaline 10−4 M dicyanoaurate solution and the heterogeneous isotope exchange of Au atoms in this system were studied by the use of ‘electrode lowering’ radiotracer techniques and 195Au-labelled dicyanoaurate. ...

The adsorption of dicyanoaurate (I) onto the surface of activated carbon is the basis of modern techniques for gold extraction. The process is very efficient and has been the major factor in improving the productivity of the gold mining industry over the last 20 years. This paper describes a stu...

The effect of thallium(I) ions on the adsorption of CN-containing species on a gold electrode from alkaline cyanide and dicyanoaurate solutions was studied by a radioactive labelling method. In cyanide solutions, adsorption of CN-containing species decreases linearly with the coverage of thalliu...

Adsorption of cyanide-containing species from 5 × 10−6–5 × 10−3 M KAu(CN)2 solutions in alkaline supporting electrolyte (0.1 M K3PO4) on gold electrodeposits was investigated over a wide potential range (from −1.5 to 1.5 V/SHE) using the radioactive labeling (14C) method. The results obtained...

The synthesis of a series of lanthanide dicyanoaurates containing the ancillary ligand 2,2′:6′,2″-terpyridine (terpy) have been carried out by reaction of Ln3+ nitrate salts with terpy and potassium dicyanoaurate. The resultant compounds, [Ln(C15H11N3)(H2O)(NO3)2Au(CN)2] (Ln = Eu, Tb, Dy, Ho,...

1-(3,4-Dimethoxyphenyl)-3,5-dodecenedione (I6), a gingerdione derivative, was synthesized in our laboratory, has been demonstrated to be an effective anti-tumor agent in human leukemia cells. Gingerdione is one of the components from ginger. In the present study, we found that I6 could inhibit c...