Luminescence Probes: The Eu3⊕‐ and Tb3⊕‐Cryptates of Polypyridine Macrobicyclic Ligands

Béatrice Alpha; Vincenzo Balzani; Jean‐Marie Lehn; Siglinda Perathoner; Nanda Sabbatini

doi:10.1002/anie.198712661

Luminescence Probes: The Eu^3⊕‐ and Tb^3⊕‐Cryptates of Polypyridine Macrobicyclic Ligands

Béatrice Alpha, Vincenzo Balzani, Jean‐Marie Lehn, Siglinda Perathoner, Nanda Sabbatini

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

172 Citations (Scopus)

Abstract

A 10⁴‐ to 10⁵‐times more intense absorption than the corresponding aqua complexes is exhibited by the cryptates 1 and 2; in the latter the ligand absorbs, in the former the metal ion. From the luminescence‐lifetimes in H₂O and D₂O it can be deduced that in Eu aq3⊕ nine or ten H₂O molecules coordinate the Eu^3⊕ ion, whereas in 1 only two or three H₂O molecules coordinate. Even in 10^‐5 molar aqueous solutions, 1 and 2 can absorb 1% of the incident UV photons and emit them again as visible light. (Figure Presented.) Copyright © 1987 by VCH Verlagsgesellschaft mbH, Germany

Original language	English
Pages (from-to)	1266-1267
Journal	Angewandte Chemie (International Edition)
Volume	26
Issue number	12
DOIs	https://doi.org/10.1002/anie.198712661
Publication status	Published - Dec 1987
Externally published	Yes

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title = "Luminescence Probes: The Eu3⊕‐ and Tb3⊕‐Cryptates of Polypyridine Macrobicyclic Ligands",

abstract = "A 104‐ to 105‐times more intense absorption than the corresponding aqua complexes is exhibited by the cryptates 1 and 2; in the latter the ligand absorbs, in the former the metal ion. From the luminescence‐lifetimes in H2O and D2O it can be deduced that in Eu aq3⊕ nine or ten H2O molecules coordinate the Eu3⊕ ion, whereas in 1 only two or three H2O molecules coordinate. Even in 10‐5 molar aqueous solutions, 1 and 2 can absorb 1% of the incident UV photons and emit them again as visible light. (Figure Presented.) Copyright {\textcopyright} 1987 by VCH Verlagsgesellschaft mbH, Germany",

author = "B{\'e}atrice Alpha and Vincenzo Balzani and Jean‐Marie Lehn and Siglinda Perathoner and Nanda Sabbatini",

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T2 - The Eu3⊕‐ and Tb3⊕‐Cryptates of Polypyridine Macrobicyclic Ligands

AU - Alpha, Béatrice

AU - Balzani, Vincenzo

AU - Lehn, Jean‐Marie

AU - Perathoner, Siglinda

AU - Sabbatini, Nanda

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

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N2 - A 104‐ to 105‐times more intense absorption than the corresponding aqua complexes is exhibited by the cryptates 1 and 2; in the latter the ligand absorbs, in the former the metal ion. From the luminescence‐lifetimes in H2O and D2O it can be deduced that in Eu aq3⊕ nine or ten H2O molecules coordinate the Eu3⊕ ion, whereas in 1 only two or three H2O molecules coordinate. Even in 10‐5 molar aqueous solutions, 1 and 2 can absorb 1% of the incident UV photons and emit them again as visible light. (Figure Presented.) Copyright © 1987 by VCH Verlagsgesellschaft mbH, Germany

AB - A 104‐ to 105‐times more intense absorption than the corresponding aqua complexes is exhibited by the cryptates 1 and 2; in the latter the ligand absorbs, in the former the metal ion. From the luminescence‐lifetimes in H2O and D2O it can be deduced that in Eu aq3⊕ nine or ten H2O molecules coordinate the Eu3⊕ ion, whereas in 1 only two or three H2O molecules coordinate. Even in 10‐5 molar aqueous solutions, 1 and 2 can absorb 1% of the incident UV photons and emit them again as visible light. (Figure Presented.) Copyright © 1987 by VCH Verlagsgesellschaft mbH, Germany

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DO - 10.1002/anie.198712661

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