10.1021/jp5060588.s001
Kenji Kanazawa
Kenji
Kanazawa
Kazuki Nakamura
Kazuki
Nakamura
Norihisa Kobayashi
Norihisa
Kobayashi
High-Contrast Electroswitching of Emission and Coloration
Based on Single-Molecular Fluoran Derivatives
American Chemical Society
2014
lactone
emission
fluoran molecule
electroswitching
coloration
fluorescence
2014-08-07 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/High_Contrast_Electroswitching_of_Emission_and_Coloration_Based_on_Single_Molecular_Fluoran_Derivatives/2267449
Multifunctional electroswitching
of both emission and coloration
was demonstrated by using fluoran derivatives in an electrolytic solution.
Further, in order to investigate changes in the photophysical properties
induced by electrical stimuli, we measured cyclic voltammogram, absorption
spetra, emission spectra, and molecular orbital calculation. The mechanism
for this electroswitching was attributed to the reversible electrochemically
induced closing and opening of the lactone ring in the fluoran molecule.
All neutral fluoran molecules were colorless and did not exhibit any
fluorescence, while the oxidized (lactone ring-opened form) molecule
was yellow and displayed a green fluorescence as a consequence of
the extended, planar, conjugated system. Furthermore, this fluoran
molecule achieved reversible electroswitchable emission and coloration
with high on/off contrast.