Journal
JOURNAL OF MOLECULAR STRUCTURE
Volume 1133, Issue -, Pages 384-391Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.molstruc.2016.12.021
Keywords
Quinoxaline; Electron-transfer; Anchor group; Knoevenagel reaction
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Funding
- Universidad del Valle
- COLCIENCIAS
- Science, Technology and Innovation Fund-General Royalties System (FCTeI-SGR) [BPIN 2013000100007]
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico [CNPq 402281/2013-6]
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo [FAPESP 2013/24725-4]
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In this work, we present the synthesis of novel donor-acceptor compounds based on 3-methylquinoxaline-2(1H)one which follow an easy synthetic route, involving Knoevenagel reaction with electron-donor groups such as N,N-dimethylaminobenzene, ferrocene, triphenylamine (TPA) and ((E)-4,4'-(ethene-1,2-diyl) bis (N,N-diphenylaniline). Additionally, the optical properties were measured by means of the absorption and emission spectroscopy suggesting a push-pull behavior which was further confirmed by electrochemical experiments. Finally, the quinoxaline-2(1H)one fragment not only bestow wide absorption, but also can chelate to titanium ions on the TiO2 surface, allowing a strong electron coupling between the excited-state energy level of the dyes and the conduction band of TiO2. (C) 2016 Elsevier B.V. All rights reserved.
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