EXTRACTION OF Am(lll) AND Eu(lll) NITRATES BY 2-6-DI-(5,6-DIPROPYL-1,2,4-TRIAZIN-3-YL)PYRIDINES 1

Kolařík, Z.; Müllich, Udo; Gaßner, Franz

doi:10.1080/07366299908934641

Cited by 300 publications

(220 citation statements)

References 2 publications

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“…1 is a multicoordinate soft-ligand containing seven nitrogen atoms. The results showed that it had an excellent extraction ability and selectivity for trivalent MAs(III) over all of the REs(III) [5][6][7]. Similar to dialkyl-BTP, some derivatives of bipyridines also exhibited the same extraction properties for MAs(III) and REs(III) [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Extraction of Some Typical Heavy Metals with a Multidentate Soft-Ligand 2,6-Bis(5,6-dipropyl-1,2,4-triazine-3-yl)pyridine

Sun¹,

Cui²,

Sun³

et al. 2014

Advances in Intelligent Systems Research

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Abstract-2, 6-bis (5,6-dipropyl-1,2,4-triazine-3-yl) pyridine (BDPTP) was synthesized with 2, 6 -dimethyl pyridine and ethyl butyrate as raw materials. And characterized by IR, 1HNMR and element analysis etc. The extraction performance of this kind of complexes for four kinds of cations, Cu(II), Cd(II), Pb(II), Ni(II) is studied in hydrochloric acid system. The results show that the extraction rate of cadmium chloride with BDPTP in dichloromethane can reach to 97.25%. It is meaningful to cadmium chloride wastewater treatment.

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Section: Introductionmentioning

confidence: 99%

Extraction of Some Typical Heavy Metals with a Multidentate Soft-Ligand 2,6-Bis(5,6-dipropyl-1,2,4-triazine-3-yl)pyridine

Sun¹,

Cui²,

Sun³

et al. 2014

Advances in Intelligent Systems Research

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“…7,8) Pyridine-based ligands have been shown to enhance the liquid-liquid extraction of uranium and the minor actinides from lanthanide actinide mixtures. [9][10][11] They probably have affinity to U(VI) compared to those coordinating with oxygen atoms, 9) although the stability constant of pyridine with U(VI) is not known. We investigated the association and dissociation of U(VI) on 4-mercaptopyridine SAM (4-PyS-SAM) to elucidate interactions of 4-PyS-SAM with U(VI).…”

Section: Introductionmentioning

confidence: 99%

Sorption of U(VI) on the 4-Mercaptopyridine Self-Assembled Monolayer

Nankawa

Ozaki

Francis

et al. 2008

J. Nucl. Sci. Technol.

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The sorption of U(VI) on the 4-mercaptopyridine self-assembled monolayer (4-PyS-SAM) on Au(111) was studied by cyclic voltammetry. Cyclic voltammograms (CVs) of the 4-PyS-SAM working electrode were obtained by contact with 1 mM UO 2 (NO 3 ) 2 solution, 1 mM UO 2 (NO 3 ) 2 and 50 mM acetic acid solution, or 1 mM UO 2 (NO 3 ) 2 and 50 mM oxalic acid solution for 6 h at pH 4. The reduction current of U(VI) to U(V) was detected in the CV. The CV of the U(VI) associated 4-PyS-SAM after transport to U(VI)-free 0.1 M NaClO 4 solution showed that the reduction current was detected in the cases of UO 2 (NO 3 ) 2 and U(VI)-acetate, but not in the case of U(VI)-oxalate solution, indicating that U(VI) was adsorbed on the 4-PyS-SAM from the UO 2 (NO 3 ) 2 and U(VI)-acetate solutions, but not from U(VI)-oxalate solution. These results suggest that stability of U(VI)-4-PyS-SAM is not so high that U(VI)-4-PyS-SAM cannot be formed in the presence of 50 mM oxalate.

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“…In addition, they are of interest due to their biological activity [4][5][6], their use as selective extractants of metal cations [7][8][9][10] (such as the actinoids), and as ligands for cations of transition metals [11].…”

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confidence: 99%

Phenylglyoxal dihydrazones as unexpected products in the synthesis of 1,2,4-triazines by interaction of α-bromoacetophenones and arylhydrazides

Kopchuk

Коvalev

Zyryanov

et al. 2013

Chem Heterocycl Comp

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On interacting α-bromoacetophenones with aromatic carboxylic acid hydrazides, the formation of two reaction products was observed in certain cases, the expected 1,2,4-triazine and the phenylglyoxal dihydrazone as an unexpected product. The effect of substituents in the initial substrates and of the conditions of carrying out the synthesis on the direction of the reaction have been studied. Keywords: aromatic acid hydrazides, α-bromoacetophenone, phenylglyoxal dihydrazone, 1,2,4-triazine, condensation.1,2,4-Triazines are of interest as convenient substrates in cycloaddition reactions [1][2][3]. In addition, they are of interest due to their biological activity [4][5][6], their use as selective extractants of metal cations [7][8][9][10] (such as the actinoids), and as ligands for cations of transition metals [11].One of the traditional methods of obtaining 3,6-disubstituted 1,2,4-triazines is the interaction of α-bromoacetophenones with two equivalents of carboxylic acid hydrazides [12]. We discovered that in a series of cases of this reaction, in addition to the expected 1,2,4-triazines one further product, the phenylglyoxal dihydrazone, was formed.In particular, on refluxing α-bromo-3-nitroacetophenone 1a with hydrazides 2a,b in a EtOH-AcOH, 3:1 mixture under an atmosphere of argon in the presence of sodium acetate, the formation of 1,2,4-triazines 3a,b in 41-45% yield and of 3-nitrophenylglyoxal dihydrazones 4a,b in 14-16% yield was established. An effective method of separating compounds 3a,b and 4a,b used by us was based on their different solubilities. After carrying out the synthetic procedure, the formation was observed first of precipitates of the less soluble cyclic 1,2,4-triazines 3a,b, and only after extended delay the formation of precipitates of the more soluble hydrazones 4a,b did occur. On carrying out the reaction in air, the fraction of dihydrazones 4a,b in the reaction products grew significantly (to 40-45%), and the yields of 1,2,4-triazines 3a,b were reduced to 10-15%.

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EXTRACTION OF Am(lll) AND Eu(lll) NITRATES BY 2-6-DI-(5,6-DIPROPYL-1,2,4-TRIAZIN-3-YL)PYRIDINES 1

Cited by 300 publications

References 2 publications

Extraction of Some Typical Heavy Metals with a Multidentate Soft-Ligand 2,6-Bis(5,6-dipropyl-1,2,4-triazine-3-yl)pyridine

Extraction of Some Typical Heavy Metals with a Multidentate Soft-Ligand 2,6-Bis(5,6-dipropyl-1,2,4-triazine-3-yl)pyridine

Sorption of U(VI) on the 4-Mercaptopyridine Self-Assembled Monolayer

Phenylglyoxal dihydrazones as unexpected products in the synthesis of 1,2,4-triazines by interaction of α-bromoacetophenones and arylhydrazides

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