Fibrillar networks of glycyrrhizic acid for hybrid nanomaterials with catalytic features

Angewandte Chemie
Abhijit SahaRaffaele Mezzenga

Abstract

Self-assembly of the naturally occurring sweetening agent, glycyrrhizic acid (GA) in water is studied by small-angle X-ray scattering and microscopic techniques. Statistical analysis on atomic force microscopy images reveals the formation of ultralong GA fibrils with uniform thickness of 2.5 nm and right-handed twist with a pitch of 9 nm, independently of GA concentration. Transparent nematic GA hydrogels are exploited to create functional hybrid materials. Two-fold and three-fold hybrids are developed by introducing graphene oxide (GO) and in situ-synthesized gold nanoparticles (Au NPs) in the hydrogel matrix for catalysis applications. In the presence of GO, the catalytic efficiency of Au NPs in the reduction of p-nitrophenol to p-aminophenol is enhanced by 2.5 times. Gold microplate single crystals are further synthesized in the GA hydrogel, expanding the scope of these hybrids and demonstrating their versatility in materials design.

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Citations

Feb 15, 2017·Chemical Record : an Official Publication of the Chemical Society of Japan ... [et Al.]·Braja Gopal Bag, Rakhi Majumdar
Jan 12, 2017·Bioorganic & Medicinal Chemistry Letters·Yingyu ChenHaijun Chen
Mar 6, 2018·Chemistry, an Asian Journal·Heshu FangJun Hu
Jun 8, 2018·Chemistry : a European Journal·Yue MaJun Hu
Aug 4, 2016·Acta Crystallographica Section B, Structural Science, Crystal Engineering and Materials·Dominik LangerEwa Tykarska
Jan 25, 2019·Gels·Ty Christoff-TempestaJulia H Ortony
Mar 5, 2021·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Jianjun ChengXin Yang
Jul 26, 2021·Advanced Drug Delivery Reviews·Ying XieJiangbing Zhou

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