G-Quadruplex Guanosine Gels and Single Walled Carbon Nanotubes
AbstractSolubilization of single walled carbon nanotubes (SWNTs) in aqueous gel phases formed by reversible, G-quadruplex self-assembly of guanosine monophosphate (GMP) alone or with guanosine (Guo) is described. Unlike other media and methods for aqueous solubilization of SWNTs, the guanosine gels (“G-gels”) are found to readily disperse high (>mg/mL) concentrations of individual rather than bundled SWNTs. SWNT dispersions in GMP alone precipitate in several hours and re-form upon shaking; however, dispersions in the binary GMP/Guo gels are indefinitely stable. Increasing GMP or KCl concentration in the binary gels increased the relative abundance of large diameter and semi-conducting SWNTs. Different gel compositions also displayed different selectivities toward SWNTs of different chiralities. These results indicate a strong connection between the self-assembled G-gels and the dimensions and structures of the SWNTs that they solubilize.
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Yu, Y.; Pushparaj, V.L.; Nalamasu, O.; McGown, L.B. G-Quadruplex Guanosine Gels and Single Walled Carbon Nanotubes. Molecules 2013, 18, 15434-15447.
Yu Y, Pushparaj VL, Nalamasu O, McGown LB. G-Quadruplex Guanosine Gels and Single Walled Carbon Nanotubes. Molecules. 2013; 18(12):15434-15447.Chicago/Turabian Style
Yu, Yuehua; Pushparaj, Victor L.; Nalamasu, Omkaram; McGown, Linda B. 2013. "G-Quadruplex Guanosine Gels and Single Walled Carbon Nanotubes." Molecules 18, no. 12: 15434-15447.