Mononuclear Cu(II) complexes of novel salicylidene Schiff bases: synthesis and mesogenic properties

Cretu, Carmen; Cseh, Liliana; Tang, Bai J.; Sasca, Viorel; Badea, Valentin; Szerb, Elisabeta I.; Mehl, Georg; Shova, Sergiu; Costisor, Otilia

Abstract

Two new Schiff base ligands 1 and 2 (where 1 = 4-(2-hydroxybenzilidenamino)-phenyl-4-(decyloxy)-2-(pent-4-enyloxy)benzoate, 2 = 4-(4-(decyloxy)-2-hydroxybenziliden amino)-phenyl-4-(decyloxy)-2-(pent-4-enyloxy)benzoate) and their copper (Cu)(II) complexes have been synthesised and characterised. The derivatives were fully characterised structurally, and their mesomorphic behaviour was investigated by polarised optical microscopyand differential scanning calorimetry. The structure of Cu(II) complex having 1 as ligand (3) was determined by X-ray diffraction. The Schiff base ligands exhibit enantiotropic nematic phases, the Cu(II) complex 4 shows monotropic nematic phase behaviour, while compound 3 does not show mesomorphism.

Citation

Cretu, C., Cseh, L., Tang, B. J., Sasca, V., Badea, V., Szerb, E. I., Mehl, G., Shova, S., & Costisor, O. (2015). Mononuclear Cu(II) complexes of novel salicylidene Schiff bases: synthesis and mesogenic properties. Liquid crystals, 42(8), 1139-1147. https://doi.org/10.1080/02678292.2015.1028491

• Journal Article Type: Article
• Acceptance Date: Mar 9, 2015
• Online Publication Date: Jun 25, 2015
• Publication Date: Aug 3, 2015
• Deposit Date: Sep 2, 2015
• Publicly Available Date: Nov 23, 2017
• Journal: Liquid crystals
• Print ISSN: 0267-8292
• Publisher: Taylor and Francis
• Peer Reviewed: Peer Reviewed
• Volume: 42
• Issue: 8
• Pages: 1139-1147
• DOI: https://doi.org/10.1080/02678292.2015.1028491
• Keywords: Schiff base, Liquid crystals, Metallomesogens, X-ray diffraction, Nematic phase
• Public URL: https://hull-repository.worktribe.com/output/378630
• Publisher URL: http://www.tandfonline.com/doi/full/10.1080/02678292.2015.1028491
• Additional Information: This is an Accepted Manuscript of an article published by Taylor & Francis in Liquid crystals on 25 June 2015, available online: http://wwww.tandfonline.com/10.1080/02678292.2015.1028491.
• Contract Date: Nov 23, 2017