Journal
CHEMISTRY-AN ASIAN JOURNAL
Volume 11, Issue 11, Pages 1677-1681Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/asia.201600285
Keywords
citrate reduction; DNA; fluorescence; gold nanoclusters; poly-adenine
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Funding
- National Natural Science Foundation of China [21475004, 21275011, 21535006]
- Peking University Education Foundation (PKUEF)
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The rationale for the preparation of DNA-templated gold nanoclusters (DNA-Au NCs) has not been well understood, thereby slowing down the advancement of the synthesis and applications of DNA-Au NCs. The interaction between metal ions and the DNA template seems to be the key factor for the successful preparation of DNA-templated metal nanoclusters. With the help of circular dichroism in this contribution, we put efforts into interrogating the necessity of pre-incubation of HAuCl4 with poly-adenine template in the formation of Au NCs by citrate reduction. Our results revealed that the pre-incubation of HAuCl4 with poly-adenine is not favorable for the formation of Au NCs, which is distinctly different from the formation process for silver nanoclusters. It is our hope that this study can provide guidance in the preparation of Au NCs with more DNA templates.
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