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Multipodal arrangement of push-pull chromophores: a fundamental parameter affecting their electronic and optical properties
Authors: Klikar Milan | Kityk Iwan V. | Kulwas D. | Mikysek Tomáš | Pytela Oldřich | Bureš Filip
Year: 2017
Type of publication: článek v odborném periodiku
Name of source: New Journal of Chemistry
Publisher name: Royal Society of Chemistry
Place: Cambridge
Page from-to: 1459-1472
Titles:
Language Name Abstract Keywords
cze Multipodální uspořádání push-pull chromoforů: základní parametr ovlivňující jejich elektronické a optické vlastnosti Byla připravena série modelových push-pull molekul s lineárním, kvadrupolárním a tripodálním uspořádáním využívající amino donor, dva akceptory a rozšířený pi-konjugovaný systém. Byly využity dva koncové elektronakceptory, tedy N,N'-dibutylbarbiturová kyselina a dikyanvinyl. Vlastnosti 24 chromoforů byly zjišťovány pomocí diferenční skenovací kalorimetrie, elektrochemie, jednofotonové absorpční spektroskopie, fotoindukované piezooptiky a byly doplněny DFT kalkulacemi. intramolekulární přenos náboje; donor; akceptor; fotofyzikální vlastnosti; organické chromofory
eng Multipodal arrangement of push-pull chromophores: a fundamental parameter affecting their electronic and optical properties A series of model push-pull molecules with linear, quadrupolar, and tripodal arrangements, a varyingly substituted amino donor, two acceptors, and a partially extended pi-system has been prepared. Two peripheral electron acceptors, namely N, N'-dibutylbarbituric acid and dicyanovinyl, were employed. The fundamental properties of 24 push-pull chromophores were investigated by differential scanning calorimetry, electrochemistry, one-photon absorption spectroscopy, photoinduced piezooptics, and were supported by DFT calculations. Thorough structure-property relationships were elucidated, while a significant influence of the structural arrangement/branching on the electronic and optical properties has been revealed. The fundamental optoelectronic properties of push-pull molecules are affected by their arrangement (linear/quadrupolar/tripodal), the peripheral acceptor attached, extension and planarization of the p-system, and also by the type of auxiliary N-substituent. intramolecular charge-transfer; enhanced 2-photon absorption; pi-linkers; photophysical properties; organic chromophores; dye molecules; solar-cells; acceptor; donor; derivatives

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