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Highly selective chemosensor for repetitive detection of Fe3+ in pure water and bioimaging

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Abstract

Combining octavinyl-polyhedral oligomeric silsesquioxane (OV-POSS) with amine-containing polyacrylamide (OV-POSS co-poly(acrylamide)) gives a new fluorescent polymeric chemo-sensor with complete water solubility. It shows better selectivity for Fe3+ in water over a wide detection range (pH = 4–10). The incorporation of Fe3+ into OV-POSS co-poly(acrylamide) results in a significant fluorescence enhancement in water over other metal ions. The bound ratio of OV-POSS co-poly(acrylamide)–Fe3+ complex was determined to be 1 : 2 according to the Job's plot. The association constant (Ka) of Fe3+ binding with the chemosensor was 7.416 × 107, and the detection limit was 0.9 × 10−9 M. Moreover, it was found that the system possessed low cytotoxicity, good permeability, high stability, and compatibility. Hence, it can be successfully applied in bio-imaging with bright blue fluorescence. In addition, a visible color change to the naked eye from colorless to bright yellow could be directly observed when Fe3+ was added into the chemosensor OV-POSS co-poly(acrylamide) compared with other metal ions.

Graphical abstract: Highly selective chemosensor for repetitive detection of Fe3+ in pure water and bioimaging

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Publication details

The article was received on 12 Jan 2019, accepted on 04 Mar 2019 and first published on 28 Mar 2019


Article type: Paper
DOI: 10.1039/C9AN00070D
Citation: Analyst, 2019, Advance Article

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    Highly selective chemosensor for repetitive detection of Fe3+ in pure water and bioimaging

    N. Omer, F. Zhang, G. Zhao, S. Guang and H. Xu, Analyst, 2019, Advance Article , DOI: 10.1039/C9AN00070D

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