Publikace detail

2,4-Distyryl and 2,4,6-Tristyrylpyrimidines: Synthesis and Optical Properties.

Autoři: Fecková Michaela | Achelle Sylvain | Robin-le Guen Francoise | le Poul Pascal | Bureš Filip

Rok: 2018

Druh publikace: ostatní - přednáška nebo poster

Strana od-do: nestránkováno

Tituly:

Jazyk	Název	Abstrakt	Klíčová slova
eng	2,4-Distyryl and 2,4,6-Tristyrylpyrimidines: Synthesis and Optical Properties.	A synthetic pathway leading to the equally or differently substituted 2,4-di and 2,4,6-tristyrylpyrimidines was described. By combination of Suzuki-Miyaura cross coupling reaction and Knoevenagel condensation twenty new tristyrylpyrimidines and three new distyrylpyrimidines were prepared. Pyrimidine (1,3-diazine) as a six-membered heterocycle with two nitrogen atoms exhibits a strong electron-withdrawing character and therefore connection with electron-donating groups via -conjugated bridge leads to intramolecular charge transfer and as it is also well-known to strong emission.1 Because of an interesting combination of properties such as emission, capability of protonation or complexation etc. pyrimidine has many applications ranging from fluorescent sensors for pH, metal cations, nitroaromatic or proteins to organic-electronics (OLEDs). Mixtures of neutral and protonated forms of pyrimidine fluorophores have been also used for the emission of white light.2 Optical properties of final compounds were studied by UV-Vis absorption and emission spectroscopy as well as their electronic properties by DFT and TD-DFT calculations. The influence of electron-donating and electron-withdrawing groups on each arm and comparison of results with 4,6-distyrylpyrimidines analogues, previously prepared in our research group, are shown.	Pyrimidines; cross/coupling reaction; optical properties

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