TY - JOUR
T1 - Bifunctional Nanoscale Assemblies
T2 - Multistate Electrochromics Coupled with Charge Trapping and Release
AU - Hamo, Yonatan
AU - Lahav, Michal
AU - van der Boom, Milko E.
PY - 2020/2/10
Y1 - 2020/2/10
N2 - We demonstrate controlled charge trapping and release, accompanied by multiple color changes in a metallo-organic bilayer. The dual functionality of the metallo-organic materials provides fundamental insight into the metal-mediated electron transport pathways. The electrochemical processes are visualized by distinct, four color-to-color transitions: red, transparent, orange, and brown. The bilayer is composed of two elements: 1) a nanoscale gate consisting of a layer of well-defined polypyridyl ruthenium complexes bound to a flexible transparent electrode, and 2) a charge storage layer consisting of isostructural iron complexes attached to the surface of the gate. This gate mediates or blocks electron transport in response to an applied voltage. The charge storage and release depend on the oxidation state of the layer of ruthenium complexes (=gate). Combining electrochemistry with optical data revealed mechanistic information: the brown coloration of the bilayer directly relates to the formation of intermediate ruthenium species, providing evidence for catalytic positive charge release mediated through the gate.
AB - We demonstrate controlled charge trapping and release, accompanied by multiple color changes in a metallo-organic bilayer. The dual functionality of the metallo-organic materials provides fundamental insight into the metal-mediated electron transport pathways. The electrochemical processes are visualized by distinct, four color-to-color transitions: red, transparent, orange, and brown. The bilayer is composed of two elements: 1) a nanoscale gate consisting of a layer of well-defined polypyridyl ruthenium complexes bound to a flexible transparent electrode, and 2) a charge storage layer consisting of isostructural iron complexes attached to the surface of the gate. This gate mediates or blocks electron transport in response to an applied voltage. The charge storage and release depend on the oxidation state of the layer of ruthenium complexes (=gate). Combining electrochemistry with optical data revealed mechanistic information: the brown coloration of the bilayer directly relates to the formation of intermediate ruthenium species, providing evidence for catalytic positive charge release mediated through the gate.
KW - charge storage
KW - electrochemistry
KW - electrochromism
KW - metallo-organics
KW - thin films
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U2 - 10.1002/anie.201912333
DO - 10.1002/anie.201912333
M3 - Article
C2 - 31696626
AN - SCOPUS:85078045947
VL - 59
SP - 2612
EP - 2617
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
SN - 1433-7851
IS - 7
ER -