Extractable oxo complexes of vanadium(V) with di(2-ethylhexyl) hydrogen phosphate

Self-assembly in surfactant-based liquid mixtures: Bis(2-ethylhexyl)phosphoric acid/bis(2-ethylhexyl)amine systems

“…In particular, as highlighted in Fig. 2: (i) the disappearance in the 1500-2800 cm À1 spectral region of the three characteristic broad bands of medium intensity occurring at about 1691, 2320 and 2650 cm À1 , observed in the spectrum of pure HDEHP and due to strongly hydrogen bonded POH group [16,17], (ii) the simultaneous appearance of new broad bands occurring at about 2416, 2566 and 2704 cm À1 , attributable to stretching vibrations due to NH þ 2 group of protonated secondary amines and at about 1621 cm À1 due to its deformation vibrations, which is absent in pure BEEA [18], suggest a significant proton transfer from the HDEHP POH group to the BEEA NH group. Additional clues concerning the interaction between the HDEHP POH group and the BEEA NH one can be achieved by the analysis of the band at 1230 cm À1 shown in Fig.…”

Nano-demixing as a novel strategy for magnetic field responsive systems: the case of dibutyl phosphate/bis(2-ethylhexyl)amine systems

“…(i) The three characteristic broad bands of medium intensity occurring at about 1691, 2320 and 2650 cm À1 observed in the spectrum of pure DBP and due to strongly hydrogen bonded POH group 8,9 are not present in the spectrum of the mixture.…”

Self-assembly in surfactant-based mixtures driven by acid–base reactions: bis(2-ethylhexyl) phosphoric acid–n-octylamine systems

“…7 On the other hand, in the spectrum of pure HDEHP, there are the three characteristic broad bands of medium intensity occurring at about 1691 cm 21 , 2320 cm 21 (with a shoulder at 2189 cm 21 ) and 2650 cm 21 , due to the strongly hydrogen bonded POH group, and the HDEHP combination bands at 1230 cm 21 (n as (PO 4 ) + d(POH)) and at 1033 cm 21 (n s (PO 4 ) + d(POC)). [8][9][10] Considering the spectra of all the mixtures, it must be noted that they cannot be rationalized in terms of the additive contributes of the two components, meaning that some interaction occurs. In particular, as emphasized in Fig.…”