This study treats about four new pyridine amide derivatives obtained by a simple and inexpensive method of synthesis which consisted in amide coupling of pyridine-2-carboxylic acid and pyridine-4-carboxylic acid chlorides and aromatic amines: methyl 2-amino-3-methylbenzoate (Ea), methyl 3-amino-...

Seven 3-hydroxy-4-pyridinecarboxylic acid derivatives (HPs), aza-analogues of salicylic acid and structurally close to other potent inflammatory pyridine compounds such as aminopyridinylmethanols and aminopyridinamines, were synthesized, and their anti-inflammatory activity was evaluated. The sy...

The graphitised carbon solid phase extraction (SPE) sorbent Envi-Carb has been used to fabricate glass fibre filter- Envi-Carb “sandwich” disks for use as a passive sampler for acid herbicides. Passive sampler uptake of a suite of herbicides, including the phenoxyacetic acid herbicides 4-chlor...

Four new possible chelating agents for iron and aluminium, 1,2-dimethyl-3-hydroxy-4-pyridinecarboxylic acid (DT712), 3-hydroxy-1,2,6-trimethyl-4-pyridinecarboxylic acid, 2,6-dimethyl-3-hydroxy-4-pyridinecarboxylic acid, and 2-ethyl-3-hydroxy-1-methyl-4-pyridinecarboxylic acid, were synthesized, ...

An effective, sensitive and simple method as a direct electroiodimetric determination of reducing biological substances using a modified multiwall carbon nanotube/ionic liquid paste electrode has been introduced. Tetra-n-octylammonium triiodide (TOAI3) was used as a new modifier which was simply...

The oxydiacetate complexes of copper(II) with 2,2′-bipyridine (bipy) and 1,10-phenanthroline (phen) have been investigated towards their kinetic and thermodynamic stability. The kinetics of the substitution reactions of the oxydiacetate complex of Cu2+ with bipy and phen have been studied in tw...

Ammonium thiosulfate solution is an ideal lixiviant to extract gold (Au) from electronic wastes (E-wastes) because it is non-toxic, less corrosive, and more selective than conventional cyanide or halide solutions. It was reported recently, however, that Au leaching efficiency in ammonium thiosul...

Soluble ions released by elemental copper nanoparticles (Cu0 NP) are toxic to key microorganisms of wastewater treatment processes. However, their toxicity to anaerobic ammonium oxidation (anammox) has not yet been studied. Chelating agents occurring in wastewater may decrease copper ions (Cu2+)...

Recent researches indicated that a copper complex-binding proteome that potently interacted with copper complexes and then influenced cellular metabolism might exist in organism. In order to explore the copper complex-binding proteome, a copper chelating ion-immobilized affinity chromatography (...

Metal complexes involving a chelation between copper(II) and the tripeptides, sarcosyl-l-leucyl-phenylalanine (Sar-Leu-Phe) and glycyl-l-leucyl-phenylalanine (Gly-Leu-Phe), have been identified as potential therapeutic drugs for rheumatoid arthritis. However, in solution the speciation and exact...

The present work describes the results of treatment of two pentacoordinated copper(II) complexes with 1,10-Phenanthroline (PHEN). During the course of the reaction, in situ generated PHEN-Cu complex has mediated the ligand transformations. In spite of the structural similarities of the precursor...

Recovery of valuable metals from electronic waste has been highlighted by the EU directives. The difficulties for recycling are induced by the high complexity of such waste. In this research, copper could be selectively recovered using an ammonia-based process, from industrially processed inform...

Cyanide is widely used in the mining industry to extract gold from ores. Some of the minerals processed for precious metals extraction contain copper species which may react with cyanide to form cuprocyanide complexes. The presence of these copper species affects adversely the process and causes...

The copper coordination chemistry of two multidentate carboxamido ligands derived from HL1 (offering two quinolyl and one carboxamide donor) and H4L2 (with two pyridine(dicarboxamido) units linked by naphthalene spacers) was explored. The former was chosen because upon deprotonation it would pro...

Diketopyrrolopyrrole (DPP), as a brilliant functional organic pigments, is an excellent candidate to be used for leveler in copper electrodeposition. Herein, the DPP derivatives with different aryl substitutions are conveniently designed, synthesized and used as levelers in copper electrodeposit...

The reaction of 2,3,7,8,12,13,17,18-octaethylporphyrin (H2OEP) with copper(II) triflate and copper(II) perchlorate in acetonitrile was studied using spectrophotometry. The reaction product is the so-called sitting-atop complex where two pyrrolenine nitrogen atoms of the porphyrin coordinate to t...

In this study, the preparation of a new iron(III) hexacoordinated metalloporphyrin namely the bis(4-ethylaniline){meso-tetra(para-chlorophenyl)porphyrinato}iron(III) triflate hemi-4-ethylaniline monohydrate with the formula [FeIII(TClPP)(PhEtNH2)2]SO3CF3•1/2PhEtNH2•H2O (I) was reported. This is ...

In this study, the SBA-16 was synthesized and modified by 3-aminopropyltriethoxysilane. Then, the copper (II) meso-tetrakis(4-chlorophenyl)porphyrin (CuTClPP) was immobilized into SBA-16 ([email protected]) by using ship in a bottle method. The synthesized mesoporous materials and heterogeneous ...

The fluorescence spectra and response characteristics of two porphyrin compounds meso-tetrakis(2-hydroxynaphthyl) porphyrin and meso-tetra (2-thiophene) porphyrin (MTHNP) to Hg2 + were investigated. MTHNP showed preferable fluorescence response to Hg2 +. Thereby, an efficient and selective fluor...

BackgroundThe aim of this study was to evaluate the effects of Korean Red Ginseng marc with aluminum sulfate as litter amendments on ammonia, soluble reactive phosphorus, and pathogen populations in poultry litters.