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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Protonation-induced dual fluorescence of a blue fluorescent material with twisted A–π–D–π–A configuration
Jingjing Yang,Liu Xing,Zemei Liu,Long Wang,Jing Sun,Zhen Guo,Huixia Xu,Hua Wang,Bo Zhao,Guohua Xie +9 more
TL;DR: In this paper, a blue fluorescent material with twisted Aπ-D-π-A configuration, namely CzPA-F-PD, was introduced, which exhibits remarkable dual fluorescence properties triggered by trifluoroacetic acid (TFA), resulting in blue and red emission peaks under both photoluminecence and electroluminescence processes.
Journal ArticleDOI
A theoretical investigation on excited-state single or double proton transfer process for aloesaponarin I
TL;DR: In this paper, the excited-state proton transfer (ESPT) dynamical behavior of aloesaponarin I (ASI) was studied using density functional theory (DFT) and time-dependent DFT (TDDFT).
Journal ArticleDOI
The effects of electron-withdrawing and electron-donating groups on the photophysical properties and ESIPT of salicylideneaniline
Lifeng Jia,Yufang Liu +1 more
TL;DR: The photophysical properties and excited state intramolecular proton transfer (ESIPT) of salicylideneaniline (1a) and its derivatives (1b-1e) with different substituents have been investigated using the DFT and TD-DFT methods.
Journal ArticleDOI
Bright white-light emission and multicolor outputs in time domain from a core-shell structured microcrystal
Dandan Ju,Feng Song,Yingdong Han,Jun Zhang,Feifei Song,Aihua Zhou,Wei Huang,Wei Huang,Victor N. Zadkov +8 more
TL;DR: In this article, a white-light color emission of lanthanide-doped core-shell structured particles at micro-scale level was presented under 980'n excitation, which showed great potential in attaining white light emitting diodes within the field emission display on specific device applications.
Journal ArticleDOI
Synthesis of fluorescent conjugated polymer nanoparticles and their immobilization on a substrate for white light emission
TL;DR: In this paper, conjugated polymer dots (CPdots) were used to fabricate white-light-emitting materials under single-wavelength excitation of a blue light emitting diode (LED) lamp.
References
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