摘要:
Five series of 3-(C10H21O-Ph-X-Ph-Y-) substituted pentane-2,4-diones and their dicarbonylrhodium(l) complexes, namely, series 1: X = -CH=CHCOO- and Y = -COO-, series 2: X -CH=CHCOO- and Y = -CH=CHCOO-, series 3: X = -COO- and Y = -CH=CHCOO-, series 4: X = -CH2O- and Y -COO-, series 5: X = -N=N- and Y = -COO-, have been synthesized, their mesogenic properties have been investigated using a Nikon polarizing microscope and DSC. It is found the beta-diketones 1a-3a, 5a and the complexes 1b-3b exhibit liquid crystal behaviors. The effect of the bridging groups of X and Y on the mesogenic properties of the ligands and the complexes has been explored. (C) 2003 Elsevier Science B.V. All rights reserved.