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Publikace detail

Tripodal Chromophores Possessing Various Fluorine-Based Peripheral Acceptors

Autoři: Klikar Milan | Prokopová Eva | Fakis Mihalis

Rok: 2025

Druh publikace: ostatní - přednáška nebo poster

Strana od-do: nestránkováno

Tituly:

Jazyk	Název	Abstrakt	Klíčová slova
eng	Tripodal Chromophores Possessing Various Fluorine-Based Peripheral Acceptors	Over the past few decades, numerous push-pull systems have been developed and thoroughly investigated. An extensive portfolio of different donors (D), linkers (pi), and acceptors (A) have been utilized and assembled into different push-pull architectures. Among the various octupolar molecules, tripodal chromophores featuring a D-(pi-A)3 arrangement, employing a triphenylamine (TPA) as a privileged donor, hold a prominent position. Furthermore, these star-shaped structures with extended conjugation considerably improve their two-photon absorption (2PA) activity. Fluorination of linkers or conventional A groups offers another possibility to modulate the optical and electrical properties of push–pull chromophores due to the powerful -I and steric effect of fluorine atom(s). Fluorination also affects crystal packing of conjugated organic materials and enhanced their solubility and subsequent processability. Based on our previous experience with 2PA absorbers, we herein present a new series of TPA-based chromophores with wide portfolio of various fluoro-functionalized phenyl acceptors at the periphery. Namely, fluorine atoms, CF3 or SF5 groups, etc., have been utilized to enhance the 2PA response of these D-(pi-A)3 star-shaped chromophores in particular. 2,5-Divinylthiophene has been embedded as a pi-linker ensuring highly effective conjugation. This systematic study thoroughly examines the effect of fluorination on the optical and electronical properties of the designed tripodal chromophores, both experimentally and theoretically.	Chromophores; triphenylamine; two-photon absorption; fluorination