Effect of structural modifications of diaza-18-crown-6 on the extractability and selectivity of univalent metal picrates

Citation
B. Ziyadanogullari et al., Effect of structural modifications of diaza-18-crown-6 on the extractability and selectivity of univalent metal picrates, TALANTA, 53(5), 2001, pp. 1083-1087
Citations number
29
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences
Journal title
TALANTA
ISSN journal
00399140 → ACNP
Volume
53
Issue
5
Year of publication
2001
Pages
1083 - 1087
Database
ISI
SICI code
0039-9140(20010126)53:5<1083:EOSMOD>2.0.ZU;2-3
Abstract
The solvent extraction of univalent metal cations with N,N'-dibenzyl-1,4,10 ,13-tetraoxa-7,16 diaza-2,3,11,12-dibenzocycloocta deca-2,11-diene (L-1), N ,N'-didodecyl-1,4,10,13-tetraoxa-7,16-diaza-2,3-benzocylooctadeca-2-ene (L- 2) and N,N'-dibenzyl-1,4,10,13-tetraoxa-7,16-diaza-2,3,11,12-dibenzocyclo o ctadeca-2,11-diene (L-3) with picrate anion into dichloromethane has been s tudied at 25 degreesC by UV-visible spectroscopy. The extractability and se lectivity of univalent metal picrates (Li+, Na+, Ag+, PhCH2NH3+, NH4+) was evaluated as a function of [ligand]/[metal cation]. L-2 showed the highest extractability and selectivity for Lit over the larger studied cations, and also exhibited the highest [Li+]/[NH4+] selectivity as L/M = 1. (C) 2001 E lsevier Science B.V. All rights reserved.