Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Excitation-Wavelength-Dependent Emission and Delayed Fluorescence in a Proton-Transfer System. / Berezin, Alexey S.; Vinogradova, Katerina A.; Krivopalov, Viktor P. и др.
в: Chemistry - A European Journal, Том 24, № 49, 03.09.2018, стр. 12790-12795.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Excitation-Wavelength-Dependent Emission and Delayed Fluorescence in a Proton-Transfer System
AU - Berezin, Alexey S.
AU - Vinogradova, Katerina A.
AU - Krivopalov, Viktor P.
AU - Nikolaenkova, Elena B.
AU - Plyusnin, Victor F.
AU - Kupryakov, Arkady S.
AU - Pervukhina, Natalia V.
AU - Naumov, Dmitrii Y.
AU - Bushuev, Mark B.
N1 - © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
PY - 2018/9/3
Y1 - 2018/9/3
N2 - 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⋅⋅⋅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, ΔEST≈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.
AB - 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⋅⋅⋅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, ΔEST≈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.
KW - delayed fluorescence
KW - fluorescence
KW - kinetics
KW - photochemistry
KW - proton transfer
KW - TADF EMITTERS
KW - LUMINESCENCE
KW - TRANSFER ESIPT
KW - BEHAVIOR
KW - METAL-ORGANIC FRAMEWORK
KW - EFFICIENCY
KW - PROBE
UR - http://www.scopus.com/inward/record.url?scp=85052392092&partnerID=8YFLogxK
U2 - 10.1002/chem.201802876
DO - 10.1002/chem.201802876
M3 - Article
C2 - 29939444
AN - SCOPUS:85052392092
VL - 24
SP - 12790
EP - 12795
JO - Chemistry - A European Journal
JF - Chemistry - A European Journal
SN - 0947-6539
IS - 49
ER -
ID: 16232777