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
Citations
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Journal ArticleDOI
Ionic Liquid Induced p-Nitrophenol Prototropism
Journal ArticleDOI
Heteroatom Substitution Controlled Luminescent Property and Excited State Intramolecular Proton Transfer (ESIPT) Process of Novel Benzothiazole-Based Fluorophore: A TD-DFT Investigation
Guo Rong Sun,Hua Fang +1 more
Journal ArticleDOI
Theoretical approach to modeling the early nonadiabatic events of ESIPT originating from three-state conical intersection in quinophthalone
TL;DR: In this article , the authors explore the excited-state intramolecular proton transfer process of quinophthalone theoretically and demonstrate the necessity of refined kinetic models for assigning the time constants of ultrafast transient spectroscopy measurements.
Secondary Through-Space Interactions Promoted White-Light Emission of Clusteroluminogens with Isolated Phenyl Rings
Tianyu Zhang,Parvej Alam,Siwei Zhang,Hanchen Shen,Lianrui Hu,Herman H. Y. Sung,Ian D. Williams,Jianwei Sun,Jacky Wing Yip Lam,Haoke Zhang,Ben Zhong Tang +10 more
TL;DR: In this article , three CLgens with non-conjugated donor-acceptor structures and different halide substituents with secondary through-space interactions are designed and synthesized.
Book ChapterDOI
Luminescent Crystal–Control of Excited-State Intramolecular Proton Transfer (ESIPT) Luminescence Through Polymorphism
TL;DR: In this paper, the relationship between crystal structure and luminescence color was rationally explained by TD-DFT calculations using dimer models, which is remarkable, that this dimer model is reasonably supported by the femtosecond time-resolved transient absorption spectroscopy.
References
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