Synthesis and liquid crystal properties of dinuclear cyclopalladated 5-alkyl-2-(4'-alkoxyphenyl)pyrimidine and 3-(4'-alkoxyphenyl)-6-alkoxypyridazine complexes
Title:
Synthesis and liquid crystal properties of dinuclear cyclopalladated 5-alkyl-2-(4'-alkoxyphenyl)pyrimidine and 3-(4'-alkoxyphenyl)-6-alkoxypyridazine complexes
Author:
Guang, Wenjie Han, Jie Wan, Wen Zhao, Keqing Zhang, Liangfu
Appeared in:
Liquid crystals
Paging:
Volume 30 (2003) nr. 11 pages 1259-1264
Year:
2003-11
Contents:
The dinuclear cyclopalladated complexes [Pd(L1 or L2)(ยต-X)]2 (HL1=5-alkyl-2-(4'-alkoxyphenyl)pyrimidine, HL2=3-(4'-alkoxyphenyl)-6-alkoxypyridazine, X=Cl-, CH2ClCOO-, CH2BrCOO-, CH3CHBrCOO-, CH2BrCH2COO-, CH3COO-) have been synthesized and characterized; their mesogenic properities were determined by DSC and polarizing microscopy. The effect of the bulk and the polarity of the bridging ligands on their mesogenic properties is discussed. The effect of the length of the alkyl chains on the mesogenic properties of these organometallic complexes has also been investigated.