Orientation of parabenzoquinone molecule was studied in three different nematic solvents (Phase 4, ZLI 1132, ZLI 1695) and in magic mixture ZLI 1132/EBBA at different temperatures. Ultraviolet (UV)-visible spectroscopy indicated that charge transfer complexes were proved to exist even with the non aromatic solvent ZLI 1695. NMR results showed that the dispersion forces' role is minimal even in magic mixture where long range interactions between the parabenzoquinone quadrupolar moment and the solvent electric field gradient are almost canceled.
Y. Arfaoui, E. Haloui
parabenzoquinone, NMR, UV-visible, nematic, interaction