CHROMOGENIC DIAZA-CROWN ETHER DICARBOXYLIC-ACIDS FOR DETERMINATION OFCALCIUM-IONS

Authors
BARTSCH RA CHAPOTEAU E CZECH BP KRZYKAWSKI J KUMAR A ROBISON TW
Citation
Ra. Bartsch et al., CHROMOGENIC DIAZA-CROWN ETHER DICARBOXYLIC-ACIDS FOR DETERMINATION OFCALCIUM-IONS, Journal of organic chemistry, 59(3), 1994, pp. 616-621
Citations number
15
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Journal of organic chemistry → ACNP
ISSN journal
00223263
Volume
59
Issue
3
Year of publication
1994
Pages
616 - 621
Database
ISI
SICI code
0022-3263(1994)59:3<616:CDEDFD>2.0.ZU;2-Z
Abstract
The synthesis of two novel calcium chromoionophores 2 and 3, which are based on a benzodiazacrown ether with an inward-facing methoxyl group and bear two acetic acid groups and a 2,4,6-trinitroanilino chromopho re, is described. Calcium and magnesium responses at pH optima are det ermined. Compound 2 exhibits a 31-nm bathochromic shift of the absorpt ion maximum, an increase in the absorptivity upon complexation with Ca 2+, and good selecitivity for Ca2+ over Mg2+ at pH 10.3. The response of chromoionophore 2 is linear from 0 to 8 X 10(-3) M Ca2+.