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Creators/Authors contains: "Sharapov, Valerii"

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  1. ; ; ; ; ; ; (, Journal of the American Chemical Society)
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  2. ; ; ; ; ; ; ; (, Chemical Science)
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    A critical issue in developing high-performance organic light-emitting transistors (OLETs) is to balance the trade-off between charge transport and light emission in a semiconducting material. Although traditional materials for organic light-emitting diodes (OLEDs) or organic field-effect transistors (OFETs) have shown modest performance in OLET devices, design strategies towards high-performance OLET materials and the crucial structure–performance relationship remain unclear. Our research effort in developing cross-conjugated weak acceptor-weak donor copolymers for luminescent properties lead us to an unintentional discovery that these copolymers form coiled foldamers with intramolecular H-aggregation, leading to their exceptional OLET properties. An impressive external quantum efficiency (EQE) of 6.9% in solution-processed multi-layer OLET devices was achieved. 
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  3. ; ; ; (, ACS Omega)
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  4. ; ; ; ; ; ; (, Chemistry of Materials)
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  5. ; ; ; ; ; ; (, ACS Applied Materials & Interfaces)
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  6. ; ; ; ; ; ; (, Macromolecules)
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  7. ; ; ; ; ; (, Journal of Materials Chemistry C)
    A photoinduced cationic polycondensation towards the synthesis of a thieno[3,4- b ]thiophene (TT) based homopolymer PTT-L was described. The reaction mechanism was investigated by employing a series of control experiments. It was found that the polymerization initiated with a light-induced radical formation, followed by a cationic propagation, all in solid state, at room temperature, and without any catalyst or solvent. In addition, a reference polymer ( PTT-Ni ) was synthesized via Kumada catalyst transfer polycondensation (KCTP) to assist in structural characterization of polymer PTT-L . It was shown that both polymers exhibit analogous optical, thermal, electrochemical and electrical properties. This polymerization process can be utilized as a mean to form patterned PTT-L films. 
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  8. ; ; ; ; ; ; ; (, ACS Applied Materials & Interfaces)