Recent results on some columnar paramagnetic metallomesogens

摘要

The liquid crystalline and selected physical properties of some vanadyl and manganese(III)-porphyrin-TCNE complexes are discussed. These materials form linear chains from a magnetic point of view and columnar discotic LC phases. Some of the manganese complexes exhibit a bulk magnetic phase below ∼20 K. The discussed materials are studied by means of DSC, X-ray powder diffraction, dielectric spectroscopy, reversal current characterization and magnetic susceptibility measurements. A broader view on some physical properties of columnar paramagnetic metallomesogens is given. Keywords Liquid crystals - magnetism - vanadyl complexes - manganese porpyhrin complexes PACS Nos 61.30.-v - 75.20.-g - 77.22.-d - 61.10.-i