Abstract
In this work, we have analyzed the experimental pressure-temperature behavior at the isotropic-nematic phase transition of the liquid crystals PAP, 5CB, MBBA, and EBBA at 1 atm by using the HERSW Convex Peg model in conjunction with the IPCM model. We have calculated the molecular volume values for the hard and attractive cores from theoretical quantum calculations at the PM3, PM6, B3LYP/6-311++G(d,p)//PM6, and M06/6-311++G(d,p)//PM6 levels of theory. The results suggest that the best theoretical prediction of the experimental pressure-temperature behavior is obtained when the molecular volume is evaluated at the DFT level.
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Acknowledgments
EGS and LHMH gratefully acknowledge financial support from the Universidad Autónoma de Zacatecas and from the Universidad Autónoma del Estado de Hidalgo, respectively. LHMH wishes to thank the financial support from CONACYT (project INFR-2014-227999) and National Laboratory for the Characterization of Physicochemical Properties and Molecular Structure, (LACAPFEM) for providing supercomputing time. We are also grateful to the reviewers of the manuscript for valuable suggestions.
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García-Sánchez, E., Mendoza-Huizar, L.H., Ramírez-García, U. et al. Analysis of the Influence of the Molecular Volume to Predict Experimental Pressure-Temperature Behavior in the Isotropic-Nematic Phase Transition of PAP, 5CB, MBBA and EBBA. Braz J Phys 45, 258–263 (2015). https://doi.org/10.1007/s13538-014-0295-6
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DOI: https://doi.org/10.1007/s13538-014-0295-6