Molecular Crystals and Liquid Crystals, Vol.378, 123-128, 2002
Synthesis of the first anthraquinone copper complex displaying a columnar phase induced by noncovalent pi-pi interactions
The first synthesis of a novel ligand, 1-hydroxy-2,3,5,6,7-pentahexyloxy-9,10-anthraquinone, is reported. Analogous to the well-known beta-diketone system, 1-hydroxy-2,3,5,6,7-pentaalkoxy-9,10-anthraquinones also form metal complexes. The first copper complex of discotic liquid crystalline 1-hydroxy-2,3,5,6,7-pentahexyloxy-9,10-anthraquinone has been prepared. The metal complex shows a columnar mesophase upon doping with trinitroflourenone, an electron acceptor molecule. The mesomorphic behavior was studied by polarizing microscopy and differential scanning calorimetry.