화학공학소재연구정보센터
Molecular Crystals and Liquid Crystals, Vol.593, No.1, 104-113, 2014
Conformational Behavior and Influence of Organic Solvents on a Strong Polar Group Nematogen at Room Temperature-A Computational Model
The conformational behavior and influence of organic solvents on a nematogen, 4'-n-alkyl-4-cyanobiphenyl, with strong polar group propyl (3CB) that is of commercial and application interest has been studied with respect to the translational and orientational motions. The atomic net charge and dipole moment components at each atomic center have been evaluated using the complete neglect differential overlap (CNDO/2) method. Themodified Rayleigh-Schrodinger Perturbation theory with themulticentered-multipole expansion method has been employed to evaluate the long-range interactions, and a "6-exp." potential function has been assumed for the short-range interactions. The minimum energy configurations obtained during the different modes of interactions have been taken as input to calculate the configurational probability using the Maxwell-Boltzmann formula in nonpolar organic solvents, i.e., carbon tetrachloride (CCl4), and chloroform (CHCl3) at room temperature 300 K. It has been observed that the molecules show the interesting property in the organic solvents. The interaction energies of dimer complexes have been taken into consideration in order to investigate the most energetically stable configuration. An attempt has been made to develop an interesting computational model for nematogen at molecular level.