Extraction Selectivities of Crown Ethers for Alkali Metal Cations:  Differences between Single-Species and Competitive Solvent Extractions

Talanova, Galina G.; Elkarim, Nazar S. A.; Hanes, Robert E.; Hwang, Hong‐Sik; Rogers, Robin D.; Bartsch, Richard A.

doi:10.1021/ac981068o

Cited by 24 publications

(24 citation statements)

References 9 publications

(9 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the case of DB18C6, 20 Therefore, we consider that species G has two bidentate H 2 O molecules. The spectral feature of species G is similar to that of species E, although the two band pairs of species G are more separated from each other compared with those of species E. 3,4 The IR-UV DR spectrum of the band H is displayed in Fig. 4(a).…”

Section: Resultsmentioning

confidence: 96%

“…Among them, the weak band at 3228 cm -1 is ascribable to the overtone of the bending vibration of H 2 O. 28 Accordingly, species H can be assigned to a B18C6-(H 2 O) 3 cluster. The four bands in the 3500-3650 cm -1 region are assignable to two pairs of the bidentate OH vibrations as shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…5(b)-(e). We carried out the geometry optimization and vibrational analysis for B18C6-(H 2 O) [2][3][4] . We utilized the initial geometries obtained by attaching H 2 O molecules to the conformers I, VI, and X according to the features described in Fig.…”

Section: Structures Of B18c6-(h 2 O) N >1mentioning

confidence: 99%

“…In these two clusters, the second H 2 O molecules [referred to as w2 in Fig. 11 From these results, it is sufficient to consider the conformation of the crown part in B18C6-(H 2 O) [2][3][4] as the conformer VI.…”

Section: Structures Of B18c6-(h 2 O) N >1mentioning

confidence: 99%

“…Therefore, species E and G can be assigned to the isomers VI-2W-1 and VI-2W-2, respectively. The optimized structures of B18C6-(H 2 O) 3,4 are shown in Fig. 11(d) and (e).…”

Section: Structures Of B18c6-(h 2 O) N >1mentioning

confidence: 99%

See 4 more Smart Citations

Water-mediated conformer optimization in benzo-18-crown-6-ether/water system

Kusaka

Inokuchi

Ebata

2009

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

The conformation of benzo-18-crown-6-ether (B18C6) and its encapsulation of water molecules in a supersonic beam are investigated by laser induced fluorescence (LIF), UV-UV hole-burning, IR-UV double resonance (IR-UV DR), and resonance-enhanced multiphoton ionization (REMPI) spectroscopy with the aid of density functional theory (DFT) calculations at the B3LYP/6-31+G* level. At least four B18C6 conformers and nine B18C6-(H2O)n (n = 1-4) clusters are identified in the supersonic beam. IR-UV DR spectra in the CH stretching region suggest that the four B18C6 conformers have different conformations from each other. In contrast, most of the nine B18C6-(H2O)n clusters have a very similar B18C6 conformation. IR-UV DR spectra in the OH stretching region provide quite clear pictures of the hydration networks formed on B18C6. In all four B18C6-(H2O)1 isomers, the water molecule is H-bonded to the two O atoms adjacent to the benzene ring in "bidentate" and "bifurcated" manners. One of the four B18C6-(H2O)1 isomers exhibits a large population, and further hydration networks are preferentially grown on this specific isomer.

show abstract

Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

Section: Structures Of B18c6-(h 2 O) N >1mentioning

confidence: 99%

Section: Structures Of B18c6-(h 2 O) N >1mentioning

confidence: 99%

“…Therefore, species E and G can be assigned to the isomers VI-2W-1 and VI-2W-2, respectively. The optimized structures of B18C6-(H 2 O) 3,4 are shown in Fig. 11(d) and (e).…”

Section: Structures Of B18c6-(h 2 O) N >1mentioning

confidence: 99%

See 3 more Smart Citations