title: High-contrast red-green-blue tricolor fluorescence switching in bicomponent molecular film.
abstract: Highly efficient red-green-blue (RGB) tricolor luminescence switching was demonstrated in a bicomponent solid film consisting of (2Z,2'Z)-2,2'-(1,4-phenylene)bis(3-(4-butoxyphenyl)acrylonitrile) (DBDCS) and (2Z,2'Z)-3,3'-(2,5-bis(6-(9H-carbazol-9-yl)hexyloxy)-1,4-phenylene)bis(2-(3,5-bis(trifluoromethyl)phenyl)acrylonitrile) (m-BHCDCS). Reversible RGB luminescence switching with a high ratiometric color contrast (λ(em)=594, 527, 458 nm for red, green, and blue, respectively) was realized by different external stimuli such as heat, solvent vapor exposure, and mechanical force. It was shown that Förster resonance energy transfer in the bicomponent mixture could be efficiently switched on and off through supramolecular control.
authors: Center for Supramolecular Optoelectronic Materials, Department of Materials Science and Engineering, Seoul National University, ENG 445 Seoul 151-744 (Korea).
authors: Hyeong-Ju
authors: HJ
authors: Kim
authors: Dong Ryeol
authors: DR
authors: Whang
authors: Johannes
authors: J
authors: Gierschner
authors: Chong Han
authors: CH
authors: Lee
authors: Soo Young
authors: SY
authors: Park
keywords: Förster resonance energy transfer; fluorescence switching; mechanochromic luminescence; self-assembly; supramolecular chemistry