Trimers nematic-isotropic transition temperatures

Figure 7 shows the distributions of (f in the isotropic phase of the simulated systems at temperatures close to the nematic/isotropic transition points. The distributions are practically featureless in the case of systems To and Tb (minor differences for these two systems are explained in Ref. [46]), while all features observed in the curves for systems T5 and Tq are seen to follow closely in position and intensity those present in the corresponding curves of Figure 4. Therefore, the distributions of

The values of y were similarly obtained for dimer CBA- (n = 9,10) and trimer CBA-Tn (n = 9,10). These compounds exhibit the nematic LC phase over a limited temperature range, hampering an accurate estimation of y by the extrapolation from this phase. Accordingly the y values were estimated by method 1 only from higher-temperature phases i.e., y i values are estimated from the isotropic phase, and ycN values from the nematic phase [95]. The ytr values thus derived are all accommodated in Tables 2 and 3, respectively, for the NI and CN transitions. Thermal pressure coefficients of monomer liquid crystals such as 4-cyano-4 -alkylbiphenyls ( CB) and 4-cyano-4 -alkoxybiphenyls ( OCB) are available in the article by OrwoU et al. [112]. The y values applicable to the NI transition of these compounds are cited in Table 4 for comparison. As shown in these tables, use of the volume change A Vtr at the transition (column 4) leads to the estimate of the volume-dependent entropy ASy (column 5) according to Eq. 3. 

Figure 10 plots the distribution of the torsion angle ip defined by the directions of the three rigid groups in a trimer molecule for system T5 in the nematic liquid at two different temperatures (note that if> is not equaJ to the torsion angle

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