Abstract
Binary liquid crystals of guanosine (GUO) and guanosine-5′-monophosphate (GMP) have been found to have unique and interesting properties in their ability to solubilize and selectively purify nanoparticles. The thermoassociative properties of these GMP-GUO g-gel phases have not been thoroughly explored and the mechanism of action is not understood. In the present study, nuclear magnetic resonance spectroscopy is used to probe the anisotropic properties of binary liquid crystals by employing deuterium nuclei. Deuterons have a quadrupolar moment that is normally averaged out by rapid molecular reorientation. In liquid crystals, however, the motion of the molecules is constrained such that quadrupolar effects are displayed in spectral data. To prevent other effects such as bulk exchange of deuterons from impacting the signal, 2H5-labeled aniline is employed to study the supramolecular structure of the liquid crystalline gels. This isotopomer of aniline has deuterons that are strongly bound to a rigid aromatic ring, allowing for study of solvent directed interactions without concern for conformation or bulk exchange effects. This study determines the anisotropy and order parameter of the binary liquid crystals to elucidate the structural and functional properties of the system.∗This research is supported by the Photosynthetic Systems Program, Office of Basic Energy Sciences, United States Department of Energy (DE-FG02-07ER15903).
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