7462-62-6Relevant academic research and scientific papers
Gamma-radiolytic stability of new methylated TODGA derivatives for minor actinide recycling
Galn, Hitos,Zarzana, Christopher A.,Wilden, Andreas,Nez, Ana,Schmidt, Holger,Egberink, Richard J. M.,Leoncini, Andrea,Cobos, Joaqun,Verboom, Willem,Modolo, Giuseppe,Groenewold, Gary S.,Mincher, Bruce J.
, p. 18049 - 18056 (2015/10/28)
The stability against gamma radiation of MeTODGA (methyl tetraoctyldiglycolamide) and Me2TODGA (dimethyl tetraoctyldiglycolamide), derivatives from the well-known extractant TODGA (N,N,N′,N′-tetraoctyldiglycolamide), were studied and compared. Solutions of MeTODGA and Me2TODGA in alkane diluents were subjected to 60Co γ-irradiation in the presence and absence of nitric acid and analyzed using LC-MS to determine their rates of radiolytic concentration decrease, as well as to identify radiolysis products. The results of product identification from three different laboratories are compared and found to be in good agreement. The diglycolamide (DGA) concentrations decreased exponentially with increasing absorbed dose. The MeTODGA degradation rate constants (dose constants) were uninfluenced by the presence of nitric acid, but the acid increased the rate of degradation for Me2TODGA. The degradation products formed by irradiation are also initially produced in greater amounts in acid-contacted solution, but products may also be degraded by continued radiolysis. The identified radiolysis products suggest that the weakest bonds are those in the diglycolamide center of these molecules.
Catalytic properties of supramolecular systems based on polyoxyethylated calixarenes and amines
Mirgorodskaya,Yatskevich,Kudryashova,Solov'Eva,Antipin,Zakharova,Konovalov
scheme or table, p. 529 - 535 (2011/10/31)
The rate of carboxylic ester cleavage by amphiphilic low-molecular-weight and polymeric amines in the presence of polyoxyethylated calix[4]arenes with different degrees of oxyethylation is determined by the formation of mixed aggregates, by the shift of pK a of the amine, and the character of the distribution of the reactants in functional micelles. All of the systems show a high substrate specificity. In the case of octyl- and decylamines, the reaction of p-nitrophenyl acetate is catalyzed and the reaction of more hydrophobic p-nitrophenyl laurate is inhibited. An opposite situation is observed in the systems based on branched polyethyleneimine: the reaction of p-nitrophenyl acetate is inhibited and the process involving p-nitrophenyl laurate is accelerated.
Aqueous solutions of geminal alkylammonium surfactants as a medium for reactions of long-chain amines
Mirgorodskaya,Kudryavtseva
experimental part, p. 42 - 48 (2009/05/30)
The formation of surfactant-hydrophobic amine mixed aggregates reduces the pK a of long-chain amines by 1-1.5 units compared with those in molecular solutions and is an important factor responsible for the high catalytic effect of the system in
