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Synthesis of Functionalized Calix[4]arene Ligands Incorporating Bipyridine N,N′-Dioxide Chromophores and Luminescence of Their Lanthanide Complexes (1998)

Prodi, Luca ; Pivari, Silvia ; Bolletta, Fabrizio ; [weitere]

Weinheim : Wiley-Blackwell

Berichte der deutschen chemischen Gesellschaft 1998 (1998), S. 1959-1965

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Details

ISSN: 1434-1948

Schlagwort(e): Luminescence ; Lanthanides ; Calixarenes ; 2,2′-Bipyridine N,N′-dioxide ; Podands ; Cryptands ; Chemistry ; General Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: Members of a new family of lanthanide complexes of the cone-shaped podand 1 and the barrel-shaped cryptand 2, based on calix[4]arenes incorporating bipyridine N,N′-dioxide chromophores, have been synthesized and characterized. The complexes were found to be stable in water and coordinating solvents. High molar absorption coefficients {ε = 28000 and 36000 M-1cm-1 for [Eu(1)]3+ and [Eu(2)]3+, respectively} and high metal luminescence quantum yields {Φ = 0.19 and 0.11 for [Eu(1)]3+ and [Eu(2)]3+, respectively} were obtained. The effect of OH oscillators, attached at the lower rim of the calixarenes, on the non-radiative deactivation to the ground state has been demonstrated.

Zusätzliches Material: 1 Ill.

Materialart: Digitale Medien

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