Univerzita Pardubice Fakulta chemicko- technologická

Univerzita Pardubice

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Publikace detail

An insight to star-shaped push-pull chromophores based on triphenylamine.

Autoři: Klikar Milan | Pytela Oldřich | Bureš Filip

Rok: 2018

Druh publikace: ostatní - přednáška nebo poster

Strana od-do: nestránkováno

Tituly:

Jazyk	Název	Abstrakt	Klíčová slova
eng	An insight to star-shaped push-pull chromophores based on triphenylamine.	Push-pull molecules continue to attract considerable attention due to their unique and peculiar optical properties. In contrast to inorganic optical materials, optoelectronic properties of organic push-pull molecules can extensively be tuned by variation of the particular chromophore D, A, and parts, which makes them very attractive for materials chemistry. Historically most frequent application of D--A systems involves nonlinear optics (NLO) including two-photon absorption 2PA as well. A general feature of the most successfully utilized organic 2PA active molecules is their star-shaped, prevailingly D-(-A)3 arrangement. The vast majority of centrifugal star-shaped systems have been built on a central amino donor, mostly triphenylamine (TPA). Owing to their huge popularity, several efforts have been made so far to understand structure-property relationships, but a large amount of knowledge remained still undisclosed. Hence, in 2015, we have reported on TPA chromophores with systematically modified peripheral acceptors and -system.[1] Subsequently, we have focused on elucidation of chromophore arrangement and have demonstrated the impact of linear, quadrupolar, and tripodal shapes on chromophore fundamental (N)LO properties.[2] In the present study, star-shaped molecules with gradually varied number of peripheral acceptors were designed (Fig. 1), synthesized and subsequently investigated by differential scanning calorimetry, electrochemistry and linear absorption and emission spectra. Two-photon absorption properties were studied by two-photon absorption fluorescence. Experimental data were completed by the results of quantum chemical calculations and thorough structure-property relationships were elucidated. [3]	triphenylamine; push-pull chromophores;push-pull chromophores