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A Viologen‐Eu(III)‐Modified TiO 2 Electrode for Electroswitchable Luminescence and Coloration
Author(s) -
Kanazawa Kenji,
Nakamura Kazuki,
Kobayashi Norihisa
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201801547
Subject(s) - viologen , luminescence , titanium dioxide , photoluminescence , europium , electrode , photochemistry , materials science , derivative (finance) , electrochemistry , chemistry , electron transfer , inorganic chemistry , optoelectronics , economics , financial economics , metallurgy
Abstract A europium(III) [Eu(III)] complex and a viologen derivative were covalently immobilized on a porous titanium(IV) dioxide (TiO 2 ) electrode by the interaction of carboxyl and phosphate groups with the surface, demonstrating electrochemically induced photoluminescence and coloration switching. The modulation of emission and coloration using the functional Eu(III)‐viologen modified TiO 2 electrode was achieved by an electrochemical reaction between TiO 2 and the viologen derivative. Luminescence control was induced via electron and energy transfer from the Eu(III) complex to TiO 2 and the linked viologen derivative. The dual functional electrode showed a high on‐off emission contrast (81:1), short response time (off: 2.5 s at −0.8 V, on: 5 s at 0 V), and high stability (over 150 cycles) for both emission and coloration control.