Journal
LIQUID CRYSTALS
Volume 38, Issue 8, Pages 1027-1033Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/02678292.2011.593198
Keywords
synthesis; nematics; heterogeneous catalysis; mesoporous silicon nitride
Funding
- EPSRC
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We report a ligand-free Pd/Si3N4 catalysed Suzuki-Miyaura aryl-aryl cross-coupling reaction using mixtures of water-miscible solvents, such as dimethoxyethane, ethanol and isopropanol with water and several bases, such as sodium carbonate and potassium phosphate. The reaction time and catalyst concentration were optimised and the heterogeneous nature of the reaction was investigated. The optimised reaction conditions were used to synthesise a standard liquid crystal using environmentally friendly solvents and a Pd/Si3N4 catalyst. This reaction is scalable to produce larger quantities.
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