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A highly efficient solution and solid state ESIPT fluorophore and its OLEDs application

Abstract : We present herein the synthesis and the photophysics of 2,2’-bipyridine-3,3’-diol-5,5’-dicarboxylic acid ethyl ester (BP(OH)$_2$DCEt$_2$), an excited state intramolecular proton tranfer (ESIPT)-based fluorophore featuring two identical intramolecular hydrogen bonds. BP(OH)$_2$DCEt$_2$ emits efficiently not only in solution, including protic solvents ($\lambda _{em}$ = 521 nm, $\Phi$$_f$ = 40 to 75%), but also in crystalline state ($\lambda _{em}$ = 530 nm, $\Phi$$_f$ = 51%). In addition, its saponified form (Na2BP(OH)2DC) is highly fluorescent in water ($\lambda _{em}$ = 490 nm, $\Phi$$_f$ = 51%). Finally, the good electroluminescence performance of BP(OH)$_2$DCEt$_2$ is also demonstrated in an OLED device.
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https://hal-cea.archives-ouvertes.fr/cea-03112970
Contributor : Serge Palacin <>
Submitted on : Monday, January 18, 2021 - 7:16:14 AM
Last modification on : Friday, March 5, 2021 - 3:12:18 PM

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Pei Yu, Virgile Trannoy, Anne Léaustic, Sophie Gadan, Régis Guillot, et al.. A highly efficient solution and solid state ESIPT fluorophore and its OLEDs application. New Journal of Chemistry, Royal Society of Chemistry, In press, 45, pp.3014-3021. ⟨10.1039/D0NJ05600F⟩. ⟨cea-03112970⟩

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