Multicolor Electrochemiluminescence of Binary Microcrystals of Iridium and Ruthenium Complexes

We here report the multicolor electrochemiluminescence (ECL) of binary microcrystals prepared from a blue‐emissive iridium complex 1 and an orange‐emissive ruthenium complex 2. These materials display a plate‐like morphology with high crystallinity, as demonstrated by microscopic and powder X‐ray di...

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Bibliographic Details
Published in:Chemistry, an Asian journal an Asian journal, 2024-12, Vol.19 (23), p.e202400987-n/a
Main Authors: Ding, Chun‐Yun, Zhong, Yu‐Wu
Format: Article
Language:English
Subjects:
Amines
assembly
Electrochemiluminescence
Electrons
Emission
Energy transfer
iridium complexes
Iridium compounds
Light diffraction
Microcrystals
organic crystals
ruthenium complexes
Ruthenium compounds
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Summary:We here report the multicolor electrochemiluminescence (ECL) of binary microcrystals prepared from a blue‐emissive iridium complex 1 and an orange‐emissive ruthenium complex 2. These materials display a plate‐like morphology with high crystallinity, as demonstrated by microscopic and powder X‐ray diffraction analyses. Under light excitation, these microcrystals exhibit gradient emission color changes as a result of the efficient energy transfer between two complexes. When modified on glass carbon electrodes, these microcrystals exhibit tunable ECLs with varied emission colors including sky‐blue, white, orange, and red, depending on the doping ratio of complex 2 and the applied potential. Furthermore, organic amines with different molecular sizes are used as the co‐reactant to examine their influences on the ECL efficiency of the porous microcrystals of 1. The analysis on the luminance and RGB values of ECL suggests the existence of energy transfer in the generation of multicolor ECLs in these binary crystals. Energy‐transfer binary microcrystals are prepared from a blue‐emissive iridium complex and an orange‐emissive ruthenium complex. When modified on glass carbon electrodes, they exhibit tunable electrochemiluminescences with varied emission colors, depending on the doping ratio of the ruthenium complex and the applied potential. This work suggests that binary organic microcrystals provide a simple platform to achieve multicolor electrochemiluminescences.
ISSN:1861-4728
1861-471X
1861-471X
DOI:10.1002/asia.202400987