Crystal smectic E revisited for(E)-N-(biphenyl-4-ylmethylene)-4-butylaniline – mesomorphism, crystal structure and FTIR study. Issue 3 (19th February 2019)

• Record Type: Journal Article
• Authors: Cozan, Vasile; Avadanei, Mihaela; Shova, Sergiu; Zaltariov, Mirela-Fernanda
• Is Part Of: Liquid crystals. Volume 46:Issue 3(2019)
• Page Start: 492
• Page End: 501
• Publication Date: 2019-02-19
• Subjects: Crystal E -- azomethine -- thermotropic liquid crystal -- optical properties; Liquid crystals -- Periodicals; 548.905
• DOI: 10.1080/02678292.2018.1512665
• Languages: English
• ISSNs: 0267-8292

Abstract

ABSTRACT: This paper recalls the attention to an interesting compound having aromatic azomethine structure, namely: (E)-N-(biphenyl-4-ylmethylene)-4-butylaniline (PB4A). The molecular structure of PB4A was determined by X-ray single-crystal diffraction analysis. Besides the enantiotropic smectic B and nematic phases, this compound exhibits a monotropic crystal E phase. By polarising optical microscopy and differential scanning calorimetry, we confirmed the existence of these phases. FTIR measurements in attenuated total reflection configuration have been performed to investigate the evolution of significant absorption bands during phase transitions. Graphical Abstract: