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Titolo:
Interactions of metal ions with monoaza crown ethers A15C5 and A18C6 carrying dansyl fluorophore as pendant in acetonitrile solution
Autore:
Warmke, H; Wiczk, W; Ossowski, T;
Indirizzi:
Univ Gdansk, Fac Chem, PL-80952 Gdansk, Poland Univ Gdansk Gdansk PolandPL-80952 sk, Fac Chem, PL-80952 Gdansk, Poland
Titolo Testata:
TALANTA
fascicolo: 3, volume: 52, anno: 2000,
pagine: 449 - 456
SICI:
0039-9140(20000630)52:3<449:IOMIWM>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
FLUORESCENCE PROBES; CYCLODEXTRINS; INCLUSION; SENSORS;
Keywords:
fluorescence probes; dansyl; azacrown ether;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
21
Recensione:
Indirizzi per estratti:
Indirizzo: Ossowski, T Univ Gdansk, Fac Chem, Sobieskiego 18, PL-80952 Gdansk, PolandUniv Gdansk Sobieskiego 18 Gdansk Poland PL-80952 nsk, Poland
Citazione:
H. Warmke et al., "Interactions of metal ions with monoaza crown ethers A15C5 and A18C6 carrying dansyl fluorophore as pendant in acetonitrile solution", TALANTA, 52(3), 2000, pp. 449-456

Abstract

The influence of metal cations Li+, Na+, K+, Cs+, Mg2+, Ca2+, Sr2+, Ba2+, Co2+, Ni2+, Cu2+, Zn2+, Ph2+ and Al3+ on the spectroscopic properties of the dansyl(1-dimethylaminonaphthalene-5-sulfonyl) group covalently linked to monoaza crown ethers 1-aza-15-crown-5 (1,4,7,10,-tetraoxa-13-azacyclopentadeca (A15C5) and 1-aza-crown-6 (1,4,7,10, 13-pentaoxa-16-azacyclooctadecane)(A18C6) was investigated by means of absorption and emission spectrophotometry. Interaction of the alkali metal ions with both fluoroionophores is weak, while alkaline earth metal ions interact strongly causing 50 and 85% quenching of dansyl fluorescence of N-(5-dimethylamine-1-naphthalenesulfonylo)-1,4,7, 10,-tetraoxa-13-azacyclopentadecane (A15CS-Dns) and N-(5-dimethylamine-1-naphthalenesulfonylo)-1,4,7, 10,13-pentaoxa-16-azacyclooctadecane (A18C6-Dns), respectively. The Cu2+, Pb2+ and Al3+ cations interact very strongly with dansyl chromophore, causing a major change in absorption spectrumof the chromophore and forming non-fluorescent complexes. The Co2+, Ni2+, Zn2+, Mg2+ cations interact moderately with both fluoroionophores causing quenching of dansyl fluorescence by several percent only. (C) 2000 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/12/20 alle ore 16:46:36