UV-vis absorption spectra of 1,4-dialkoxy-2,5-bis[2-(thien-2-yl)ethenyl]benzenes

0343218 - ÚVGZ 2011 RIV GB eng J - Článek v odborném periodiku
Fuks-Janczarek, I. - Reshak, Ali H - Kuznik, W. - Kityk, I. V. - Gabanski, R. - Lapkowski, M. - Motyka, R. - Suwinski, J.
UV-vis absorption spectra of 1,4-dialkoxy-2,5-bis[2-(thien-2-yl)ethenyl]benzenes.
Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy. Roč. 72, č. 2 (2009), s. 394-398. ISSN 1386-1425. E-ISSN 1873-3557
Výzkumný záměr: CEZ:AV0Z60870520
Klíčová slova: absorption spectra * quantum-chemical simulations
Kód oboru RIV: BO - Biofyzika
Impakt faktor: 1.566, rok: 2009

Complex theoretical and experimental studies and quantum-chemical calculations were applied to study the UV-vis spectroscopic features of the novel compounds: three stereoisomers of 1,4-diethoxy-2,5bis[2-(5-methylthien-2-yl)ethenyl]benzene (A-C) and EE isomer of 1,4-diisopropoxy-2,5-bis[2-(thien-2-yl)ethenyl]benzene (D). These structures are the derivatives of 2,5-bis[2-(thien-2-yl)ethenyl]benzene, and belong to a group of thienyl-PPV family that are able to polymerize due to the presence of pi-conjugated bonding system. It was established that such compounds during electropolymerization are strongly dependent on their stereochemistry and on the eventual presence of substituents in alpha-positions. of the tiophene ring. We have obtained a good agreement between the theoretically simulated optical within a framework of TDDFT approach and experimentally measured data. Influence of PMMA polymer matrices on the UV-vis spectra is explored.
Trvalý link: http://hdl.handle.net/11104/0185743