Liquid benzothiadiazole-based organic luminophores emitting light from the blue to red spectral region: synthesis, properties, and application in liquid scintillators

Dyadishchev, I.V.; Balakirev, D.O.; Kalinichenko, N.K.; Svidchenko, E.A.; Surin, N.M.; Peregudova, S.M.; Vasilev, V.G.; Shashkanova, O.Y.; Bakirov, A.V.; Ponomarenko, S.A.; Luponosov, Y.N.

Авторы: Dyadishchev Ivan V., Balakirev Dmitry O., Kalinichenko N.K., Svidchenko Evgenia A., Surin Nikolay M., Peregudova Svetlana M., Vasilev Victor G., Shashkanova Olga Yu, Bakirov Artem V., Ponomarenko Sergey A., Luponosov Yuriy N.
Журнал: Dyes and Pigments
Том: 224
Год издания: 2024
Издательство: Elsevier BV
Местоположение издательства: Netherlands
Номер статьи: 112003
DOI: 10.1016/j.dyepig.2024.112003
Аннотация: AbstractLiquid organic luminophores (LOLs) have been actively investigated as a new generation of functional materials in various fields of organic optoelectronics and photonics. However, many issues, including the structure–properties relationships and the development of LOLs emitting light in the red spectral range, remain poorly investigated. Here we report on the synthesis and investigation of a series of novel conjugated luminescent molecules consisting of a central 2,1,3-benzothiadiazole electron-withdrawing unit and lateral thiophene or phenylene electron-donating fragments with terminal trialkylsilyl units as solubilizing groups (SGs). Thermal and thermo-oxidative stability, phase behavior, structural properties, rheology, and optical and electrochemical properties of the obtained luminophores were studied and compared to their counterparts without SGs or with ineffective SGs for liquefaction. The target compounds are luminescent liquids with low glass transition temperatures (up to −65 °C) and viscosities (up to 1.7 Pa s) or liquid crystal materials emitting light in almost the entire visible spectral range with high photoluminescence quantum yield (PLQY) both in solutions (up to 97 %) and films (up to 87 %). For the first time, the application of LOLs as a new generation of organic liquid scintillators was demonstrated, achieving a light yield up to 1.7 times higher than that of a standard liquid scintillator.AcknowledgmentsThe work was supported by the Russian Science Foundation (grant number 19-73-30028) and carried out at ISPM RAS. NMR and absorption and luminescent spectra were obtained using the equipment of the Collaborative Access Center ‘Center for Polymer Research’ of the Enikolopov Institute of Synthetic Polymeric Materials of the Russian Academy of Sciences with financial support from the Ministry of Science and Higher Education of the Russian Federation (topic FFSM-2021-0005). SWAXS data were obtained using the equipment of the Kurchatov Complex for Synchrotron and Neutron Investigations. Authors acknowledge M.S. Skorotetcky and L.L. Levkov for the synthesis of some model compounds and P.V. Dmitryakov for carrying out DSC and TGA experiments. The authors also acknowledge O. A. Maloshitskaya for recording MALDI-TOF spectra.
Добавил в систему: Дядищев Иван Васильевич

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Liquid benzothiadiazole-based organic luminophores emitting light from the blue to red spectral region: synthesis, properties, and application in liquid scintillatorsстатья

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