Rubidium‐selektive Chromoionophore mit  N ‐(Arylazoalkenoyl)azacoronand‐Struktur | Zendy

Kirschke Klaus | Zendy; Baumann Hendrik | Zendy; Costisella Burkhard | Zendy; Ramm Matthias | Zendy

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Rubidium‐selektive Chromoionophore mit N ‐(Arylazoalkenoyl)azacoronand‐Struktur

Author(s) -

Kirschke Klaus,

Baumann Hendrik,

Costisella Burkhard,

Ramm Matthias

Publication year - 1994

Publication title -

liebigs annalen der chemie

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.825

H-Index - 155

eISSN - 1099-0690

pISSN - 0170-2041

DOI - 10.1002/jlac.199419940905

Subject(s) - chemistry , rubidium , acetonitrile , medicinal chemistry , ring (chemistry) , potassium , organic chemistry

Rubidium‐Selective Chromoionophores with N ‐(Arylazoalkenoyl)azacoronand Structure The N ‐(arylazoalkenoyl)azacoronands 2a–2c have been synthesized by ring‐opening reaction of the dichloropyrazolin‐5(4 H )‐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 1 H‐, 2 H‐, 13 C‐ and 87 Rb‐NMR investigations indicate a complexation of the Rb ion between the crown and the phenolic OH group of 2b .

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