[5-(p-alkoxy)phenyl-10, 15, 20-tri-phenyl] porphyrin and their rare earth complex liquid crystalline

Autor:	Wen-yang Zhang, Yong Fan, Miao Yu, Wen-ping Jian, Guo-fa Liu
Rok vydání:	2007
Předmět:	Lanthanide Absorption spectroscopy Surface photovoltage Organic Chemistry Analytical chemistry Infrared spectroscopy Porphyrin chemistry.chemical_compound Crystallography chemistry Liquid crystal Alkoxy group Physical and Theoretical Chemistry Spectroscopy
Zdroj:	Journal of Physical Organic Chemistry. 20:229-235
ISSN:	1099-1395 0894-3230
Popis:	Three series of porphyrin liquid crystalline compounds, [5-(p-alkoxy)phenyl-10, 15, 20-tri-phenyl] porphyrin and their rare earth complexes (Tb (III), Dy (III), Er (III), Yb (III)), with a hexagonal columnar discotic columnar(Colh) phase have been synthesized. These compounds were characterized by elemental analysis, molar conductances, UV-visible spectra, infrared spectra, luminescence spectra, and cyclic voltammetry. These compounds exhibit more than one mesophases, which transition points of temperature change from −33.6 to 16.0 °C, and transition points of temperature for isotropic liquid also increase from 4.9 to 38.2 °C, with increasing chain length. Their surface photovoltage (SPV) response have also been investigated by the means of surface photovoltage spectroscopy (SPS) and field-induced surface photovoltage spectroscopy (EFISPS). It was found that their SPV bands are analogous with the UV-visible absorption spectra and derived from the same transition. Copyright © 2007 John Wiley & Sons, Ltd.
Databáze:	OpenAIRE
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