Biaxial nematic phase of crank-like bis(β-diketonato)copper(II) complexes established by X-ray diffraction and Z-value calculations. (3rd May 2017)

• Record Type: Journal Article
• Authors: Kanai, Yoriko; Akimoto, Hajime; Ohta, Kazuchika
• Is Part Of: Molecular crystals and liquid crystals. Volume 648(2017)
• Page Start: 130
• Page End: 147
• Publication Date: 2017-05-03
• Subjects: Biaxial nematic phase -- Bis(β-diketonato)copper(II) complexes -- Metallomesogen -- Short title: Biaxial LC of 8-diketonato Cu complexes -- X-ray diffraction -- Z-value calculations; Molecular crystals -- Periodicals; Liquid crystals -- Periodicals; Liquid crystals; Molecular crystals; Periodicals; 548
• DOI: 10.1080/15421406.2017.1301922
• Languages: English
• ISSNs: 1542-1406

Abstract

ABSTRACT: We have synthesized a series of six novel bis(β-diketonate)copper (II) complexes, 1a, 1b, 2a, 2b, 3a, and 3b, substituted by two bulky substituents in the short molecular axis direction to investigate their mesomorphism. The m, p, m'-trimethoxylphenyl-substituted derivatives, 2a and 2b, and the m, p-dimethoxylphenyl-substituted derivatives, 3a and 3b, did not show mesomorphism, whereas each of the p-methoxyphenyl-substituted derivatives 1a and 1b only showed a nematic phase, which was revealed from polarizing microscopic observations. We established from X-ray diffraction and Z-value calculations that each of the crank-like derivatives 1a and 1b forms a rectangular parallelepiped dimer and shows a biaxial nematic phase.