Photo-induced reversible emission switching in pyridine/europium(III) chloride/organic fluorophore system

Authors
Vaganova, E Yitzchaik, S Shapiro, L Sigalov, M Khodorkovsky, V
Citation
E. Vaganova et al., Photo-induced reversible emission switching in pyridine/europium(III) chloride/organic fluorophore system, ADVAN MATER, 12(22), 2000, pp. 1669
Citations number
23
Categorie Soggetti
Multidisciplinary,"Material Science & Engineering
Journal title
ADVANCED MATERIALS
ISSN journal
09359648 → ACNP
Volume
12
Issue
22
Year of publication
2000
Database
ISI
SICI code
0935-9648(20001116)12:22<1669:PRESIP>2.0.ZU;2-1
Abstract
A blue-red reversible optical switch has been created by combining Eu-III, pyridine, and a fluorescent organic chromophore. The initial solution exhib its the expected blue emission of the chromophore until UV irradiation lead s to red emission (see Figure), a process that is ascribed to protonation o f the pyridine and formation of a charge-transfer complex with the chromoph ore in the excited state, allowing the red Eu-III photoluminescence to be e mitted.