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Photo‐Induced Reversible Emission Switching in Pyridine/Europium( III ) Chloride/Organic Fluorophore System
Author(s) -
Vaganova E.,
Yitzchaik S.,
Shapiro L.,
Sigalov M.,
Khodorkovsky V.
Publication year - 2000
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/1521-4095(200011)12:22<1669::aid-adma1669>3.0.co;2-d
Subject(s) - europium , fluorophore , materials science , pyridine , photochemistry , chloride , photoluminescence , inorganic chemistry , fluorescence , optoelectronics , luminescence , organic chemistry , optics , metallurgy , chemistry , physics
A blue–red reversible optical switch has been created by combining Eu III , pyridine, and a fluorescent organic chromophore. The initial solution exhibits the expected blue emission of the chromophore until UV irradiation leads to red emission (see Figure), a process that is ascribed to protonation of the pyridine and formation of a charge‐transfer complex with the chromophore in the excited state, allowing the red Eu III photoluminescence to be emitted.