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Palladium complexes of side‐chain liquid crystal polymers with T‐shaped two‐dimensional mesogenic units
Author(s) -
Zhang S. Y.,
Deng G.,
Li Z. F.,
Cao S. K.,
Zhou Q. F.
Publication year - 2002
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.98
Subject(s) - mesogen , palladium , materials science , liquid crystal , polymer , differential scanning calorimetry , substituent , ligand (biochemistry) , condensation polymer , melting point , crystallography , texture (cosmology) , alkoxy group , side chain , polymer chemistry , alkyl , organic chemistry , composite material , chemistry , liquid crystalline , catalysis , biochemistry , physics , optoelectronics , receptor , image (mathematics) , artificial intelligence , computer science , thermodynamics
Abstract A series of liquid crystal polymers (LCPs) with T‐shaped two‐dimensional mesogenic units were synthesized via solution polycondensation. The LCPs were used as ligand polymers to coordinate with palladium dichloride, by which a series of polymeric palladium complexes were prepared. The liquid crystalline behaviors of the compounds were characterized using differential scanning calorimetry, polarized microscopy and X‐ray diffraction. The entire palladium complexes went to liquid crystal phase when heated to their melting temperature (T m ), and a threaded texture was observed. The melting point of all the complexes changes regularly with the increase of the end alkoxy group length and the flexible spacer unit in the ligand polymer. It is worth noting that some of the complexes without end substituent groups in the ligand polymer were also found to show liquid crystal behaviors, which would be a subject for further investigation. Copyright © 2001 John Wiley & Sons, Ltd.