Molecules 2013, 18(12), 15434-15447; doi:10.3390/molecules181215434
Article

G-Quadruplex Guanosine Gels and Single Walled Carbon Nanotubes

1 Department of Chemistry and Chemical Biology, Rensselaer Polytechnic Institute, Troy, NY 12180, USA 2 Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
* Author to whom correspondence should be addressed.
Received: 7 November 2013; in revised form: 25 November 2013 / Accepted: 3 December 2013 / Published: 11 December 2013
(This article belongs to the Special Issue G-Quadruplexes & i-Motif DNA)
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Abstract: Solubilization 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.
Keywords: G-quadruplex; guanosine gel; guanosine tetrad; guanosine monophosphate; single-walled carbon nanotubes

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MDPI and ACS Style

Yu, Y.; Pushparaj, V.L.; Nalamasu, O.; McGown, L.B. G-Quadruplex Guanosine Gels and Single Walled Carbon Nanotubes. Molecules 2013, 18, 15434-15447.

AMA Style

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.

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