Citation: Tian-Tian Chen, Qiu-Yun Chen, Ming-Yang Liu. GAG-containing nucleotides as mediators of DNA-silver clusters and iron-DNA interplay[J]. Chinese Chemical Letters, ;2016, 27(03): 395-398. doi: 10.1016/j.cclet.2015.12.013
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New types of fluorescence DNA-based silver nanoclusters (DNAn-AgNCs, n=1, 2, 3c, 4c, 5c) were synthesized by C3T-rich nucleotides as templates. It is found that the assembly of DNAn-AgNCs with nucleotides containing GAG sequences produce silver clusters with an enhanced red emission. Results indicate that GAG is the good enhancer of DNAn-AgNCs constructed by C3T-rich nucleotides. The fluorescence titration reveals that enhanced red emission is sensitive to Fe(Ⅲ/Ⅱ) ions with the formation of non-emission nanoclusters. Thus, the GAG-containing nucleotide can be an enhancer for the emission of silver clusters with C3T-rich nucleotide and a mediator of the iron-cluster interplay.
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Keywords:
- DNA,
- Silver cluster,
- Fluorescence,
- Iron
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