چکیده :

Disc–shaped liquid crystals with interesting structural features are an important research field in the science and technology. Function of these strongly depends on their molecular structure and the media that surrounds them. This paper highlights spectral features of three symmetrical disc–shaped liquid crystals with similar structures and dissimilar substituent groups in various surrounding media to recognize their interactional and structural similarities and differences. Determining the type of molecular interactions in these liquid crystals and their effect is of great importance in accurate determination of host–guest interactions for diverse applications in polymer–dispersed liquid crystal displays, elastomers and optical industries, and so on. For this purpose, spectral variations were analyzed through KAT (Kamlet–Abboud–Taft) model and the dipole moments were measured through UV–visible spectroscopic technique, too. The dipole moment results reveal that the electron cloud resides in the central part of these liquid crystals. The experimental datawere validated via DFT (Density Functional Theory) calculations. Both experimental and theoretical data assist to better identify the spectroscopic features of these liquid crystals and give useful information about their performance in various media that can be valuable for designing applicable guest–host or mixture liquid crystal systems.

کلید واژگان :

Disk–shaped liquid crystal Molecular interaction Kamlet–Abboud–Taft parameter Density functional theory Dipole moment



ارزش ریالی : 300000 ریال
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