Abstract
This study describes the synthesis of Ag nanoparticles using DNA templates with polymorphic structures including the G-quadruplex, the I-motif, and the Duplex and their application for the catalytic reduction of 4-nitrophenol by NaBH4. Interactions between Ag+ and polymorphic DNA were studied through circular dichroism, polyacrylamide gels, and UV spectroscopy. Ag nanoparticles with narrow size distributions were prepared through the reduction of Ag+ by NaBH4 under different DNA templates and Ag+/base ratios. These DNA-templated Ag nanoparticles demonstrated excellent catalytic performance in the reduction reaction of 4-nitrophenol. The rate constants depended on the structure of DNA template, with the decreasing order: I-motif-Ag > G-quadruplex-Ag > Duplex-Ag. The results obtained here suggest a promising pathway to adjust physical–chemical properties of metal nanoparticles through the template of polymorphic DNA.
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This work was supported by NSFC (20776102, 20836005), the National Basic Research Program of China (2006CB202500), the state key laboratory of catalytic material and research engineering (RIPP, SINOPEC), and the NCET.
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Zheng, L., Zhang, R., Ni, Y. et al. Catalytic Performance of Ag Nanoparticles Templated by Polymorphic DNA. Catal Lett 139, 145–150 (2010). https://doi.org/10.1007/s10562-010-0419-8
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DOI: https://doi.org/10.1007/s10562-010-0419-8