Enhancement of the helical twisting power of a ruthenium complex by the introduction of an achiral bulky unit. (13th April 2017)

• Record Type: Journal Article
• Authors: Yoshida, Jun; Kuwahara, Kyohei; Tamura, Shuhei; Yuge, Hidetaka; Watanabe, Go
• Is Part Of: Molecular crystals and liquid crystals. Volume 647(2017)
• Page Start: 179
• Page End: 185
• Publication Date: 2017-04-13
• Subjects: Chiral dopant -- Cholesteric -- metal complex Δ -- Λ chirality -- molecular picket-fence; Molecular crystals -- Periodicals; Liquid crystals -- Periodicals; Liquid crystals; Molecular crystals; Periodicals; 548
• DOI: 10.1080/15421406.2017.1289586
• Languages: English
• ISSNs: 1542-1406

Abstract

ABSTRACT: Helical twisting powers of a series of ruthenium complexes with screw-like Δ, Λ chirality were investigated in N -(4-Methoxybenzylidene)-4-butylaniline (MBBA). Λ-[Ru(acac)2 (trop)] (acac = acetylacetonate, trop = tropolonate) shows a fairly low HTP of 18 µm −1, while we found that the HTP increased almost double by connecting with an achiral bulky unit [Ru(Cp)(dppe)] (Cp = cyclopentadienyl, dppe = 1, 2-bis(diphenyl)phosphinoethane) that was found to behave as a molecular "picket fence" to force the orientation of surrounding MBBA molecules.