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Organic Photonics and Photovoltaics

Editor-in-Chief: Facchetti, Antonio

Ed. by Ponomarenko, Sergei

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2299-3177
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Influence of chemical structure of branched and dendritic organosilicon luminophores on their optical and thermal properties

Oleg V. Borshchev
  • Corresponding author
  • Enikolopov Institute of Synthetic Polymeric Materials of the Russian Academy of Sciences, Profsoyuznaya 70, Moscow 117393, Russian Federation
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/ Elena A. Kleymyuk
  • Enikolopov Institute of Synthetic Polymeric Materials of the Russian Academy of Sciences, Profsoyuznaya 70, Moscow 117393, Russian Federation
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/ Nikolay M. Surin
  • Enikolopov Institute of Synthetic Polymeric Materials of the Russian Academy of Sciences, Profsoyuznaya 70, Moscow 117393, Russian Federation
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/ Evgeniya A. Svidchenko
  • Enikolopov Institute of Synthetic Polymeric Materials of the Russian Academy of Sciences, Profsoyuznaya 70, Moscow 117393, Russian Federation
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/ Yuriy V. Fedorov
  • Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Vavilova st. 28, Moscow 119991, Russian Federation
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/ Petr V. Dmitryakov
  • National Research Center “Kurchatov Institute”, Akademika Kurchatova pl.1, Moscow 123182, Russian Federation
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/ Sergei N. Chvalun
  • National Research Center “Kurchatov Institute”, Akademika Kurchatova pl.1, Moscow 123182, Russian Federation
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/ Sergei A. Ponomarenko
  • Enikolopov Institute of Synthetic Polymeric Materials of the Russian Academy of Sciences, Profsoyuznaya 70, Moscow 117393, Russia and Moscow State University, Chemistry Department, Leninskie gory, 1-3, Moscow, 119992, Russian Federation
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Published Online: 2017-04-27 | DOI: https://doi.org/10.1515/oph-2017-0001

Abstract

Synthesis and investigation of optical and thermal properties of a homologous series of highly luminescent nanostructured organosilicon luminophores (NOLs) containing different donor to acceptor ratio (D:A) are reported. Each of the NOL consists of a 1,4-bis(5-phenylthienyl-2-yl)benzene (PTPTP) acceptor unit and four, six or twelve 2,2′-bithienyl donor fragments connected to each other through two or six silicon atoms. These complex molecules show a “molecular antenna” effect with high efficiency of intramolecular energy transfer about 97-98% combined with excellent photoluminescence (PL) quantum yield of 84-91% and fast PL decay time of 0.90-0.95 ns. A significant increase of the molar extinction coefficient from 94 000 to 257 000 M−1cm−1 with increasing the D:A ratio from 4:1 to 12:1 was observed. It was found that increasing the branching extent in the NOLs prohibits their crystallization. Thermal gravimetric analysis (TGA) showed that all the NOLs reported, regardless of their branching extent, are thermally stable up to 455 °C under nitrogen. These characteristics make them promising materials for various organic photonics applications.

Keywords: luminescent dendrimer; Suzuki reaction; thiophene-phenylene co-oligomer; bithiophene; thermostable luminophores; nanostructured organosilicon luminophore; molecular antennae effect; intramolecular energy transfer; Förster resonance energy transfer; FRET

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About the article

Received: 2016-12-08

Accepted: 2017-03-17

Published Online: 2017-04-27

Published in Print: 2017-04-01


Citation Information: Organic Photonics and Photovoltaics, ISSN (Online) 2299-3177, DOI: https://doi.org/10.1515/oph-2017-0001.

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© 2017. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License. BY-NC-ND 4.0

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