ISSN:
0170-2041
Keywords:
Chromoionophores
;
Rubidium compounds
;
Azacoronands
;
Pyrazolin-5(4H)-one, 4,4-dichloro-
;
Chemistry
;
Organic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Rubidium-Selective Chromoionophores with N-(Arylazoalkenoyl)azacoronand StructureThe N-(arylazoalkenoyl)azacoronands 2a-2c have been synthesized by ring-opening reaction of the dichloropyrazolin-5(4H)-one 1 with the corresponding azacrowns. The structure of 2a was determined by X-ray analysis. In the presence of Rb+ salts the neutral solutions of 2a and 2b in acetonitrile or acetonitrile/water mixtures show a change of colour from yellow to red. Spectroscopic results of 1H-, 2H-, 13C- and 87Rb-NMR investigations indicate a complexation of the Rb ion between the crown and the phenolic OH group of 2b.
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/jlac.199419940905
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