Transition metals complexed in ordered mesophases. XV. Synthesis, characterization and mesomorphic properties of new potentially ferroelectric liquid crystals: Acetylacetonatep,p′-dialkoxyazobenzene mononuclear palladium(II) complexes
作者:
Mauro Ghedini,
Daniela Pucci,
Edoardo Cesarotti,
Oriano Francescangeli,
Roberto Bartolino,
期刊:
Liquid Crystals
(Taylor Available online 1994)
卷期:
Volume 16,
issue 3
页码: 373-380
ISSN:0267-8292
年代: 1994
DOI:10.1080/02678299408029162
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The sysnthesis and characterization of two series of chiral mononuclear palladium(II) azocompounds, (LN(n))Pd(acac)], prepared by bridge splitting reactions or the dinuclear parents {Pd[LN(n)]μ-Cl)}2with thallium acetylacetonate are reported. All the complexes, bearing a stereogenic centre in the alkoxy lateral chain (R*O=R-(−)-2-octyl;S-(−)-β-citronellyl), are mesomorphic. Their thermotropic behaviour has been investigated by differential scanning calorimetry, optical microscopy and X-ray diffraction. Worthy of note, the clearing temperatures of all the compounds are below 70°C. The relationship between ligands, μ-Cl dimers and mononuclear acetylacetonate complexes is discussed.
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