Journal
JOURNAL OF ORGANIC CHEMISTRY
Volume 74, Issue 1, Pages 375-382Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jo802190q
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- University of Copenhagen
- Danish Research Agency [2111-04-0018]
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Novel di- and tetraethynylethene (DEE and TEE) compounds functionalized with tetrathiafulvalene (TTF) donor groups and p-nitrophenyl acceptor groups were synthesized by palladium-catalyzed cross-coupling reactions under various conditions. The molecules are strong chromophores and were investigated for their optical properties. Placement of two TTFs and two p-nitrophenyls about a central TEE core provides a molecule with a high third-order optical nonlinearity. The molecules experience reversible oxidations of the TTF units, and the optical properties of the oxidized species were elucidated by spectroelectrochemistry. The degree of quinoid character of the p-nitrophenyl in the molecules was determined by X-ray crystallography.
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