Modified synthesis scheme for N,N´-dimethyl-N,N´-dioctyl-2,(2´-hexyloxyethyl) malonamide (DMDOHEMA) and its comparison with proposed solvents for actinide partitioning

Novel diamide ligands with a central carbonyl group and their comparative evaluation with the diglycolamide ligand: synthesis, extraction, DFT and chromatographic studies

The extraction behaviour of U(VI), Th(IV) and Nd(III) was investigated as a function of nitric acid concentration for diamide based extractants, namely, N,N,N′,N′-tetraoctyl-3-carbonylpentanediamide (TOCPDA) and 4-carbonyl-heptanedioic acid bis-dioctylamide (CHADA). In addition, the distribution ratio was also measured for Pu(IV) and Sr(II) with 1.1 M CHADA in n-dodecane. These extractants were synthesized by adopting simple acid, amine coupling reaction with DCC (dicyclohexylcarbodiimide) and DMAP (N,N′-dimethylaminopyridine) as the coupling agent. The newly synthesized extractants were characterized by FT-IR, NMR, Mass, CHNS and HPLC. The extraction results indicated that CHADA shown has better extraction behavior for U(VI) compared to TOCPDA. In addition, CHADA coated HPLC column was examined for the retention behaviour of U(VI), Th(IV), and Nd(III). Computation studies based on density functional theory (DFT) were carried out to understand the complexing behaviour of U(VI), Pu(IV) and Sr(II) with CHADMA and TMCPDA.

The electropolymerization of N,N′-(propane-1,3-diyl)bis(2-aminobenzamide), characterization, and capacitor study

In this study, aniline-based monomer, N, N′-(propane-1,3-diyl)bis(2-aminobenzamide), (PAB), was synthesized and characterized by proton nuclear magnetic resonance (1H-NMR), carbon-13 nuclear magnetic resonance (13C-NMR), and Fourier transform infrared spectroscopy. The electropolymerization of the monomer was performed on glassy carbon electrode by cyclic voltammetry (CV). The effects of solvent, dopant, scan number, and scan rate on the electropolymerization and properties of the poly(PAB) films were investigated. The modified electrode was also characterized by Fourier transform infrared-attenuated total reflection spectroscopy and scanning electron microscopy–energy-dispersive X-ray analysis. The capacitive properties of the poly(PAB) films were firstly tested by electrochemical impedance spectroscopy. The highest specific capacitances ( Csp) of poly(PAB) films were obtained as Csp = 6.22 mF cm−2 in 0.1 M lithium perchlorate/acetonitrile (ACN) for [PAB]0 = 20 mmol dm−3 and Csp = 16.9 mF cm−2 in 1 mol dm−3 sulfuric acid for [PAB]0 = 5 mmol dm−3 at the scan rate of 5 mV s−1 from CV measurements. This study is novel because it was the first study on capacitance performances of poly(PAB) films in the literature.

Ligands for f-element extraction used in the nuclear fuel cycle

This review describes the latest advances regarding the development, modification and application of suitable ligands for the liquid–liquid extraction of actinides and lanthanides from nuclear waste.

Evaluation of malonic acid diamide analogues as radical scavenging agents

The radical scavenging ability of malonamides has been explored by use of the pulse radiolysis technique.