1186-10-3Relevant articles and documents
Tetra-Substituted p-Tert-Butylcalix[4]Arene with Phosphoryl and Salicylamide Functional Groups: Synthesis, Complexation and Selective Extraction of f-Element Cations
Glasneck, Florian,Kersting, Berthold,Roode-Gutzmer, Quirina I.,Stumpf, Thorsten
supporting information, (2022/02/02)
A new series of lanthanide (1–5) and uranyl (6) complexes with a tetra-substituted bifunctional calixarene ligand H2L is described. The coordination environment for the Ln3+ and UO22+ ions is provided by phosphoryl and salicylamide functional groups appended to the lower rim of the p-tert-butylcalix[4]arene scaffold. Ligand interactions with lanthanide cations (light: La3+, Pr3+; intermediate: Eu3+ and Gd3+; and heavy: Yb3+), as well as the uranyl cation (UO22+) is examined in the solution and solid state, respectively with spectrophotometric titration and single crystal X-ray diffractometry. The ligand is fully deprotonated in the complexation of trivalent lanthanide ions forming di-cationic complexes 2 : 2 M : L, [Ln2(L)2(H2O)]2+ (1–5), in solution, whereas uranyl formed a 1 : 1 M : L complex [UO2(L)(MeOH)]∞ (6) that demonstrated very limited solubility in 12 organic solvents. Solvent extraction behaviour is examined for cation selectivity and extraction efficiency. H2L was found to be an effective extracting agent for UO22+ over La3+ and Yb3+ cations. The separation factors at pH 6.0 are: βUO (Formula presented.) /La (Formula presented.) =121.0 and βUO (Formula presented.) /Yb (Formula presented.) =70.0.
IONIC LIQUID
-
Page/Page column 40; 41, (2019/05/15)
Ionic liquids are described which have a very broad electrochemical stability window and which are therefore of high utility for a wide range of electrochemical energy storage device applications.
Chemoselective Activation of Diethyl Phosphonates: Modular Synthesis of Biologically Relevant Phosphonylated Scaffolds
Adler, Pauline,Pons, Amandine,Li, Jing,Heider, J?rg,Brutiu, Bogdan R.,Maulide, Nuno
supporting information, p. 13330 - 13334 (2018/09/25)
Phosphonates have garnered considerable attention for years owing to both their singular biological properties and their synthetic potential. State-of-the-art methods for the preparation of mixed phosphonates, phosphonamidates, phosphonothioates, and phos