Journal ArticleDOI
Fine Tuning the Energetics of Excited-State Intramolecular Proton Transfer (ESIPT): White Light Generation in A Single ESIPT System
Kuo-Chun Tang,Ming-Jen Chang,Tsung-Yi Lin,Hsiao-An Pan,Tzu-Chien Fang,Kew-Yu Chen,Wen-Yi Hung,Yu-Hsiang Hsu,Pi-Tai Chou +8 more
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TLDR
The results provide the proof of concept that the white light generation can be achieved in a single ESIPT system.Abstract:
Using 7-hydroxy-1-indanone as a prototype (I), which exhibits excited-state intramolecular proton transfer (ESIPT), chemical modification has been performed at C(2)-C(3) positions by fusing benzene (molecule II) and naphthalene rings, (molecule III) I undergoes an ultrafast rate of ESIPT, resulting in a unique tautomer emission (λ(max) ∼530 nm), whereas excited-state equilibrium is established for both II and III, as supported by the dual emission and the associated relaxation dynamics The forward ESIPT (normal to proton-transfer tautomer species) rates for II and III are deduced to be (30 ps)(-1) and (22 ps)(-1), respectively, while the backward ESIPT rates are (11 ps)(-1) and (48 ps)(-1) The ESIPT equilibrium constants are thus calculated to be 037 and 22 for II and III, respectively, giving a corresponding free energy change of 059 and -047 kcal/mol between normal and tautomer species For III, normal and tautomer emissions in solid are maximized at 435 and 580 nm, respectively, achieving a white light generation with Commission Internationale de l'Eclairage (CIE) (030, 027) An organic light-emitting diode based on III is also successfully fabricated with maximum brightness of 665 cd m(-2) at 20 V (885 mA cm(-2)) and the CIE coordinates of (026, 035) The results provide the proof of concept that the white light generation can be achieved in a single ESIPT systemread more
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Journal ArticleDOI
Locked ortho- and para-Core Chromophores of Green Fluorescent Protein; Dramatic Emission Enhancement via Structural Constraint
Yen-Hao Hsu,Yi-An Chen,Huan-Wei Tseng,Zhiyun Zhang,Jiun-Yi Shen,Wei-Ti Chuang,Tzu-Chieh Lin,Chun-Shu Lee,Wen-Yi Hung,Bor-Cherng Hong,Shih-Hung Liu,Pi-Tai Chou +11 more
TL;DR: Compared with their unlocked counterparts, a substantial increase in the emission yield is also observed for p-LHBDI and H2BDI in anionic forms in water, and accordingly the structure versus luminescence relationship is fully discussed based on their chemistry and spectroscopy aspect.
Journal ArticleDOI
A Strap Strategy for Construction of an Excited‐State Intramolecular Proton Transfer (ESIPT) System with Dual Fluorescence
Naoya Suzuki,Aiko Fukazawa,Kazuhiko Nagura,Shohei Saito,Hirotaka Kitoh-Nishioka,Daisuke Yokogawa,Stephan Irle,Shigehiro Yamaguchi +7 more
TL;DR: An amine-embedded flexible alkyl strap has been incorporated into an emissive boryl-substituted dithienylpyrrole skeleton as a new entity of excited-state intramolecular proton transfer (ESIPT) chromophores that shows a dual emission.
Journal ArticleDOI
Insight into the mechanism and outcoupling enhancement of excimer-Associated white light generation
Ying-Hsiao Chen,Kuo-Chun Tang,Yi-Ting Chen,Jiun-Yi Shen,Yu-Sin Wu,Shih-Hung Liu,Chun-Shu Lee,Chang-Hsuan Chen,Tzu-Yu Lai,Shih-Huang Tung,Ru-Jong Jeng,Wen-Yi Hung,Min Jiao,Chung-Chih Wu,Pi-Tai Chou +14 more
TL;DR: Fundamental insight into excimer formation of Cz9PhAn is provided, achieving a single-component, high-performance WOLED.
Journal ArticleDOI
Strategic emission color tuning of highly fluorescent imidazole-based excited-state intramolecular proton transfer molecules
TL;DR: A general strategy for a wide-range spectral tuning of imidazole-based ESIPT materials based on three different strategies--introduction of a nodal plane model, extension of effective conjugation length, and modification of heterocyclic rings is developed.
Journal ArticleDOI
2-(2-hydroxyphenyl)-benzothiazole (HBT)-rhodamine dyad: acid-switchable absorption and fluorescence of excited-state intramolecular proton transfer (ESIPT).
Poulomi Majumdar,Jianzhang Zhao +1 more
TL;DR: The absorption and emission of the ESIPT Chromophore were switched by a acid/base-activatable rhodamine chromophore to add additional modulability to the ES IPT chromophores.
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