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
Substitution Effect on 2-(Oxazolinyl)-phenols and 1,2,5-Chalcogenadiazole-Annulated Derivatives: Emission-Color-Tunable, Minimalistic Excited-State Intramolecular Proton Transfer (ESIPT)-Based Luminophores.
TL;DR: In this paper, minimalistic 2-(oxazolinyl)-phenols substituted with different electron-donating and -withdrawing groups as well as 1,2,5-chalcogenadiazole-annulated derivatives thereof were synthesized and investigated in regard to their emission behavior in solution and solid state.
Journal ArticleDOI
White-light-emitting triphasic fibers as a phosphor for light-emitting diodes
TL;DR: In this article, a white-light-emitting PMMA-CBS-127/PVP-coumarin 6/PAN-rhodamine B (PSCR) fibrous membrane was designed and demonstrated.
Journal ArticleDOI
Effect of intramolecular and intermolecular hydrogen bonding on the ESIPT process in DEAHB molecule
TL;DR: In this article, the influence of intramolecular and intermolecular hydrogen bonding on the excited-state proton transfer (ESIPT) for the 4-N,N'-(diethylamino)-2-hydroxybenzaldehyde (DEAHB) was investigated.
Journal ArticleDOI
Fine-tuned dual fluorescence behavior of N-substituted aniline-imidazopyridine based switches: Mechanistic understanding, substituent and solvent effects.
Hossein Roohi,Parvaneh Alizadeh +1 more
TL;DR: In order to understand the fine-tuned photo-physical behaviors of the N(X)-H⋯N systems, the excited state intramolecular proton transfer (ESIPT) switching in the N-substituted X1-5-NHIPA molecules was investigated in detail in gas phase and three solvent media.
Journal ArticleDOI
Producing a dual-fluorescent molecule by tuning the energetics of excited-state intramolecular proton transfer.
TL;DR: A fluorescence lifetime analysis revealed the ESIPT reaction rate of 10 to be much slower than those of other derivatives and that the normal and tautomer forms were in equilibrium in the excited state.
References
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