Investigations on thermotropic hydrogen bond liquid crystals. Issue 1 (13th April 2023)

• Record Type: Journal Article
• Authors: Usha, K. S.; Rohini, P.; Vivekanandan, J.; Pongali Sathya Prabu, N.; Madhu Mohan, M. L. N.
• Is Part Of: Molecular crystals and liquid crystals. Volume 755:Issue 1(2023)
• Page Start: 1
• Page End: 13
• Publication Date: 2023-04-13
• Subjects: Hydrogen bond -- liquid crystal -- α-ketoglutaric acid -- DSC -- FTIR; Molecular crystals -- Periodicals; Liquid crystals -- Periodicals; Liquid crystals; Molecular crystals; Periodicals; 548
• DOI: 10.1080/15421406.2022.2102749
• Languages: English
• ISSNs: 1542-1406

Abstract

Abstract: Novel hydrogen bond liquid crystal homologous series derived from alkyloxy benzoic acids and α-ketoglutaric acid are isolated and experimented. This homologous series referred as KGA + nBAO comprises of eight mesogens in which the alkyloxy benzoic acid varied from pentyloxy to dodecyloxy. Fourier Transform Infrared Spectroscopy analysis confirmed the formation of hydrogen bond. Optical polarizing microscopy reveals that this homologous series exhibits three phases namely nematic, smectic C and smectic G. The transition temperatures obtained by Differential Scanning Calorimetry and optical microscopy and corresponding enthalpy values are tabulated for all the homologues of the series and various thermal parameters are derived.