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Dicyanopyrazine and Dicyanobenzene Derived X-shaped Push-Pull Chromophores

Authors: Bureš Filip | Dokládalová Lenka

Year: 2015

Type of publication: ostatní - přednáška nebo poster

Page from-to: nestránkováno

Titles:

Language	Name	Abstract	Keywords
eng	Dicyanopyrazine and Dicyanobenzene Derived X-shaped Push-Pull Chromophores	Organic molecules based on the sp2/sp hybridized carbon/hetero atom scaffold end-capped with electron donors and acceptors represent an intensively investigated area of organic chemistry. In these molecules, intramolecular charge-transfer (ICT) from the donor to the acceptor via a pi-system takes place and the D-pi-A system become dipolar/polarized and gain peculiar properties. Nowadays, D-pi-A systems are frequently applied as active substances in devices with nonlinear optical properties (NLO) and dye-sensitized solar cells (DSSCs). As a continuation of our effort in the field of NLO molecules, we report herein a series of novel X-shaped push-pull chromophores based on benzene-1,2-dicarbonitrile and pyrazine-2,3-dicarbonitrile. Structure-property relationships in both isolobal chromophores were investigated by X-ray analysis, electrochemistry, absorption and emission spectra, SHG experiment and quantum-chemical calculations and were further critically compared.	push-pull molecules, chromophores, intramolecular charge-transfer, nonlinear optical properties, benzene-1,2-dicarbonitrile, pyrazine-2,3-dicarbonitrile