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In this paper, the self-assembling nature of nano-doped liquid crystals is characterized using different techniques. Liquid crystals, namely 4, n-alkoxybenzoic acid (nOBA, where n = 7,8), doped with magnetic nanoparticles (Fe3O4 of size 20nm) are considered for the present study. The structural and morphological properties of nano-doped liquid crystals are determined by the techniques of X-ray diffraction and Scanning Electron Microscopy. Morphological properties like grains, grain boundaries, and crystal defects are elucidated using the scanning electron microscope technique. Structural properties such as crystal structure, grain size, inter-atomic spacing, lattice constant, and dislocation density are determined using X-ray diffraction studies. The characteristics measured from the X-ray diffraction studies are correlated using the statistical analysis of Scanning electron microscope images. This is an objective analysis of X-ray diffraction studies. In addition to these techniques, colorimetric studies of optical anisotropic liquid crystals are carried out by measuring the chromaticity coordinates and color purity. This study utilizes the polarizing optical microscope technique. Furthermore, the influence of nano dopants on the characteristics of liquid crystals with carbon chain length is also discussed. [ABSTRACT FROM AUTHOR]

This study utilizes spectral analysis techniques and various computational methods to examine the impact of hydrogen bonding on the optical characteristics of supramolecular liquid crystals within the UV-visible spectrum. This investigation involves the computational method of spectral denoising for quantitative analysis of UV-visible spectra, and then spectral analysis is carried out for the measurement of the optical properties of supramolecular liquid crystals. Other computational methods, like the texture absorbance method, are also employed for colorimetric studies of compounds. The investigation will focus on supramolecular systems:p,n-alkoxy benzoic acid: Do-decyl hydroxybenzoate (nOBA:12HB), where n = 7, 8, and 9. The supramolecular system is formed via hydrogen bond development between the OH acceptor of the non-liquid crystalline substance Do-decyl hydroxyl benzoate (12HB) and the COOH donor of the liquid crystal p-n alkoxy benzoic acid. Here, optical properties: such as absorption coefficient, optical energy band gap, Urbach energy, and refractive index of supramolecular liquid crystals are measured for the denoised spectral data. The influence of hydrogen bonding and alkoxy chain length on the optical properties of liquid crystals has been deliberated upon. Further, the attempt at computation studies on the spectral data will yield important insights for subsequent investigations into UV-visible spectral data measurements. [ABSTRACT FROM AUTHOR]

This study examines the molecular interactions and thermal characteristics of supramolecular hydrogen-bonded liquid crystals, utilizing FTIR and thermal analysis techniques. Our investigation focuses on the hydrogen-bonded liquid crystal system of p, n-alkoxy benzoic acid: nonyl-p-hydroxy benzoate (nOBA: 9HB), specifically with 'n' values of 6, 7, and 8. The intermolecular interactions between the COOH donor of liquid crystal p-n alkoxy benzoic acid and the OH acceptor of non-liquid crystalline compound nonyl-p-hydroxybenzoate (9HB) result the supramolecular system through hydrogen bonding. The existence and applicability of newly formed systems depend on the strength of the bond formed between the molecules and the stability of the complex system. Here, the molecular vibration method of FTIR and thermal analysis techniques are employed to characterize the supramolecular systems (nOBA: 9HB, where n = 6,7, and 8). Results obtained from this investigation explain how the presence of hydrogen bonds influences the molecular and thermal properties of liquid crystal complexes towards the improvement of device performance and their utility in biological applications. [ABSTRACT FROM AUTHOR]