X-ray investigations on the cyclopalladated mesogen bis-{5-(1-nonyl)-2{[4′1-nonyloxy)phenyl-2′-ato]}pyrimidine-N′,C2′]-μ-iodo}dipalladium(II)
作者:
Mauro Ghedini,
Daniela Pucci,
Roberto Bartolino,
Oriano Francescangeli,
期刊:
Liquid Crystals
(Taylor Available online 1993)
卷期:
Volume 13,
issue 2
页码: 255-263
ISSN:0267-8292
年代: 1993
DOI:10.1080/02678299308026299
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The cyclopalladated complex [Pd(L3)(μ-I)]2([Pd(L3)(μ -I)]2= bis-{5-(1-nonyl)-2{[4′(1-nonyloxy)phenyl-2′-ato]}pyrimidine-N′,C2′]-μ-iodo}dipaladium (II); C→105·1°C (C1)→128·1°C (SA)→202·5°C (I)) has been investigated by X-ray diffraction and the electron density profile along the director, in the smectic phase, determined. [Pd(L3(μ -I)]2is a mesogenic species with a lateral-lateral fused molecular shape whose main features are: (i) the solid C1phase when observed with a polarizing microscope gives a polygonal texture like a smectic A phase, and (ii) to describe properly the electron density profile along the director a model which takes into account a high electron density area (i.e. the four aromatic rings and the Pd2I2fragment) extending perpendicular to the director is required.
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