Extraction of sodium and potassium picrates with 15-(2,5-dioxahexyl)-15-methyl-16-crown-5 (lariat 16C5) into various organic solvents. Elucidation of fundamental equilibria which determine the extraction ability for Na+ and K+ and the selectivity

J of Applied Polymer Sci

et al. 2011

A series of new bis triazole Schiff base derivatives (4) were prepared in good yields by treatment of 4-amino-3,5-diphenyl-4H-1,2,4-triazole (3) with bisaldehydes (1). Schiff bases (4) were reduced with NaBH 4 to afford the corresponding bisaminotriazoles (5). All the new compounds were characterized by IR, 1 H NMR and 13 C NMR spectral data. Their overall extraction (log K ex ) constants for 1 : 1 (M : L) complexes and CHCl 3 /H 2 O systems were determined at 25 6 0.1 C to investigate the relationship between structure and selectivity toward various metal cations. The extraction equilibrium constants were estimated using CHCl 3 /H 2 O membrane transfer with inductively coupled plasma-atomic emission spectroscopy spectroscopy. The stability sequence of the triazole derivatives in CHCl 3 for the metal cations was exhibited a characteristic preference order of extractabil-]. The compounds were tested for anti-microbial activity applying agar diffusion technique for 11 bacteria.

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis, extraction, and anti‐bacterial studies of some new bis‐1,2,4‐triazole derivatives part I

Gümrükçüoğlu

J of Applied Polymer Sci

et al. 2011

“…Determination of ion-pair formation constants of organic ligands-metal ion complexes in water can be examined by different methods through the extraction of metals to various organic solvents with organic ligands. The solvent extraction of metal cations containing ligands is generally preferred for its easy determination by spectrophotometric methods [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, extraction and antibacterial studies of some new bis-1,2,4-triazole derivatives part II

Gümrükçüoğlu

J Incl Phenom Macrocycl Chem

et al. 2011

The treatment of 4-amino-3,5-diphenyl-4H-1,2,4-triazole 3 with various bis-aldehydes resulted in the formation of bis-4-arylidenamino-3,5-diphenyl-4H-1,2,4triazoles (4a-d) derivatives. NaBH 4 reduction of 4-arylidenamino derivatives of 1,2,4-triazoles afforded 4-arylamino-3,5-diphenyl-4H-1,2,4-triazoles (5a-d). The synthesized all new triazole derivatives of the Schiff base and corresponding bis amino compounds 4a,d-5a,d were characterized by IR, 1 H-NMR, 13 C-NMR spectral data. In order to investigate the relative effects of the differences between the structures of the synthesized triazole derivatives on their extractionabilities and-selectivities for different metal cations, constants of oveall extraction (logK ex ) of 1:1 (M:L) complexes, the extractions (logK ex ) for CHCl 3 /H 2 O systems have been determined with ICP-AES spectroscopy at 25 ± 0.1°C. Remarkable complexation properties are found towards some transition metal cations. The stability sequences of the triazole derivatives in CHCl 3 for the metal cations generally found in order: (II). The synthesized all compounds were tested for antimicrobial activity against 11 bacteria.

“…Especially, investigation of effect of steric structure around electron donor atoms in the reagent on the separation ability is very important for the development of novel reagents having high separation performance. The determination of complexation constants of organic ligandsmetal ion complexes in water can be examined with different methods by following the extraction of metals to the varied organic solvents with organic ligands [24][25][26][27][28][29]. The solvent extraction of metal cations which contains macrocyclic ligands is preferred to use for its easy determination by spectrophotometric methods [23,30,31].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, complexation, and biological activity studies of 4‐aminomethyl‐7,8‐dihydroxy coumarines and their crown ether derivatives

Gumus

Karadeniz

Journal of Heterocyclic Chem

et al. 2010

The article focuses synthesis of novel 4‐aminomethyl‐7,8‐dihydroxy coumarins and their crown ether derivatives. The purified novel coumarins and their crown ether derivatives were identified by 1H NMR, 13C NMR, mass spectrometry and elemental analysis. The 1:1 binding constants of Ca2+, Mg2+, Fe2+, Zn2+, Ni2+, Cd2+, Co2+, and Mn2+ ions at 25°C ± 0.1 with the 4‐aminomethyl‐7,8‐dihydroxy coumarins and their crown ether derivatives estimated using extraction procedure with Inductively Coupled Plasma‐Atomic Emission Spectroscopy in dichloromethane/water membrane systems. Synthesized compounds were investigated for complexation and biological activity properties. Best results in biological activity studies were observed for antioxidant activity. J. Heterocyclic Chem., (2010).