Synthesis of liquid crystals based on hydrogen-bonding of 4-(Octyloxy)benzoic acid with 4-alkylbenzoic acids. (2nd May 2016)

• Record Type: Journal Article
• Authors: Miranda, M. D.; Chávez, F. Vaca; Maria, T.M.R.; Eusébio, M. E. S.; Sebastião, P.J.; Martín-Ramos, P.; Figueirinhas, J. L.; Silva, M. Ramos
• Is Part Of: Molecular crystals and liquid crystals. Volume 630(2016)
• Page Start: 87
• Page End: 101
• Publication Date: 2016-05-02
• Subjects: 4-Alkylbenzoic acids -- hydrogen bonding -- liquid crystals -- mechanochemistry -- 4-(octyloxy)benzoic acid; Molecular crystals -- Periodicals; Liquid crystals -- Periodicals; Liquid crystals; Molecular crystals; Periodicals; 548
• DOI: 10.1080/15421406.2016.1146881
• Languages: English
• ISSNs: 1542-1406

Abstract

ABSTRACT: A molecular recognition process has been used to form new mesogenic molecular structures, where intermolecular hydrogen bonding occurs between 4-(octyloxy)benzoic acid (8BAO) and four 4-alkylbenzoic acids (nBAs, n = 2, 5, 6, 7). The synthesis of these complexes has been attained by resorting to mechanochemistry. The resulting materials have been characterized by polarizing optical thermal microscopy, differential scanning calorimetry, vibrational spectroscopy, X-ray powder diffraction, and 1 H NMR relaxometry. All the elements of the series show the formation of a mesophase. For one of the complexes, its electro-optical properties have also been assessed, resulting comparable to those of other widely used liquid crystals.