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Excitation-Wavelength-Dependent Emission and Delayed Fluorescence in a Proton-Transfer System Full article

Journal Chemistry - A European Journal
ISSN: 0947-6539 , E-ISSN: 1521-3765
Output data Year: 2018, Volume: 24, Number: 49, Pages: 12790-12795 Pages count : 6 DOI: 10.1002/chem.201802876
Tags delayed fluorescence; fluorescence; kinetics; photochemistry; proton transfer
Authors Berezin Alexey S. 1 , Vinogradova Katerina A. 1,2 , Krivopalov Viktor P. 3 , Nikolaenkova Elena B. 3 , Plyusnin Victor F. 2,4 , Kupryakov Arkady S. 2,4 , Pervukhina Natalia V. 1,2 , Naumov Dmitrii Y. 1,2 , Bushuev Mark B. 1,2
Affiliations
1 (Данные Web of science) Russian Acad Sci, Nikolaev Inst Inorgan Chem, Siberian Branch, 3 Akad Lavrentiev Ave, Novosibirsk 630090, Russia
2 (Данные Web of science) Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia
3 (Данные Web of science) Russian Acad Sci, NN Vorozhtsov Novosibirsk Inst Organ Chem, Siberian Branch, 9 Akad Lavrentiev Ave, Novosibirsk, Russia
4 (Данные Web of science) Russian Acad Sci, Inst Chem Kinet & Combust, Siberian Branch, 3 Inst Skaya Str, Novosibirsk 630090, Russia

Abstract: Manipulating the relaxation pathways of excited states and understanding mechanisms of photochemical reactions present important challenges in chemistry. Here we report a unique zinc(II) complex exhibiting unprecedented interplay between the excitation-wavelength-dependent emission, thermally activated delayed fluorescence (TADF) and excited state intramolecular proton transfer (ESIPT). The ESIPT process in the complex is favoured by a short intramolecular OH center dot center dot center dot N hydrogen bond. Synergy between the excitation-wavelength-dependent emission and ESIPT arises due to heavy zinc atom favouring intersystem crossing (isc). Reverse intersystem crossing (risc) and TADF are favoured by a narrow singlet-triplet gap, Delta E-ST approximate to 10 kJ mol(-1). These results provide the first insight into how a proton-transfer system can be modified to show a synergy between the excitation-wavelength-dependent emission, ESIPT and TADF. This strategy offers new perspectives for designing ESIPT and TADF emitters exhibiting tunable excitation-wavelength-dependent luminescence.
Cite: Berezin A.S. , Vinogradova K.A. , Krivopalov V.P. , Nikolaenkova E.B. , Plyusnin V.F. , Kupryakov A.S. , Pervukhina N.V. , Naumov D.Y. , Bushuev M.B.
Excitation-Wavelength-Dependent Emission and Delayed Fluorescence in a Proton-Transfer System
Chemistry - A European Journal. 2018. V.24. N49. P.12790-12795. DOI: 10.1002/chem.201802876 WOS Scopus РИНЦ
Dates:
Published online: Aug 8, 2018
Published print: Sep 3, 2018
Identifiers:
Web of science WOS:000443382500008
Scopus 2-s2.0-85052392092
Elibrary 35737813
OpenAlex W2810477821
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