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Your search keyword '"Wöhrle, Tobias"' showing total 2 results
Start Over Author "Wöhrle, Tobias" Publisher american chemical society
2 results on '"Wöhrle, Tobias"'

1. Discotic Liquid Crystals.

Author

Wöhrle, Tobias, Wurzbach, Iris, Kirres, Jochen, Kostidou, Antonia, Kapernaum, Nadia, Litterscheidt, Juri, Haenle, Johannes Christian, Staffeld, Peter, Baro, Angelika, Giesselmann, Frank, and Laschat, Sabine

Subjects
*DISCOTIC liquid crystals, *ORGANIC chemistry, *ANALYTICAL chemistry, *CHEMISTRY periodicals, *PUBLISHING
Published
2016
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2. Pushing Steric Bias in the Scholl Reaction to Access Liquid Crystalline Crown Ethers.

Author

Wöhrle, Tobias, Kirres, Jochen, Kaller, Martin, Mansueto, Markus, Tussetschläger, Stefan, and Laschat, Sabine

Subjects
*CROWN ethers, *ETHERS, *IONOPHORES, *TERPHENYL, *POLYCHLORINATED terphenyls
Abstract

Sterically congested o-terphenyl crown ethers with alkoxy substituents at the 2,3,4-position or 3,4,5-position were synthesized from the corresponding tetrabromodibenzo[15]crown-5 and the corresponding boronic acids or borolanes via Suzuki cross-coupling and subsequently cyclized to the corresponding triphenylenes utilizing the Scholl reaction. Both series of compounds were investigated by differential scanning calorimetry, polarizing optical microscopy, and X-ray diffraction (SAXS, WAXS) regarding their mesomorphic properties. While all but one of the 3,4,5-substituted derivatives displayed liquid crystalline behavior (Colh and Colr), only the 2,3,4-substititued triphenylene with the shortest alkoxy chains was liquid crystalline (Colr). [ABSTRACT FROM AUTHOR]

Published
2014
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