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G-Quadruplex based hydrogels stabilized by a cationic polymer as an efficient adsorbent of picric acid

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Abstract

Hydrogels based on G-quadruplexes (G-hydrogels) were prepared using guanosine 5′-monophosphate disodium salt, GMP, with a hyperbranched poly(ethylenimine), PEI, containing abundant –NH2 groups. The cation–dipolar interaction between Na+ ions and GMP-quartets and the hydrogen bonding between the phosphate groups of GMP and the –NH2 groups of PEI gave rise to the hydrogels at an appropriate pH range of 1.7–4.3. X-ray diffraction (XRD) measurements and fluorescence enhancement of Thioflavin T (ThT) indicated the formation of the G-quadruplexes. The G-hydrogel showed high adsorption capacity for the contaminant, picric acid (PA), in water, ascribed to its plentiful –NH2 groups in the network structures.

Graphical abstract: G-Quadruplex based hydrogels stabilized by a cationic polymer as an efficient adsorbent of picric acid

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Publication details

The article was received on 17 Jun 2019, accepted on 16 Oct 2019 and first published on 22 Oct 2019


Article type: Paper
DOI: 10.1039/C9NJ03143J
New J. Chem., 2019, Advance Article

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    G-Quadruplex based hydrogels stabilized by a cationic polymer as an efficient adsorbent of picric acid

    J. Zhang, X. Li, X. Sun, Y. Liu, J. Hao, Y. Tan and A. Song, New J. Chem., 2019, Advance Article , DOI: 10.1039/C9NJ03143J

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