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Highly sensitive and selective mercury sensor based on mismatched base pairing with dioxT.

Ji Hoon Han1, Shingo Hirashima, Soyoung Park

  • 1Department of Chemistry, Graduate School of Science Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan. oleesy@kuchem.kyoto-u.ac.jp hs@kuchem.kyoto-u.ac.jp.

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Summary

A novel fluorescent nucleobase, dioxT, enables highly sensitive and selective mercury ion detection. This new sensor demonstrates significant potential for environmental monitoring and biological applications.

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Area of Science:

  • Biochemistry
  • Analytical Chemistry
  • Materials Science

Background:

  • Mercury ions pose significant environmental and health risks.
  • Development of sensitive and selective sensors for mercury detection is crucial.

Purpose of the Study:

  • To design and characterize a novel fluorescent sensor for mercury ions.
  • To investigate the metal-sensing capabilities of a new fluorescent nucleobase, dioxT.

Main Methods:

  • Utilized a new fluorescent nucleobase, dioxT.
  • Investigated metal-sensing ability using mismatched dioxT-T and dioxT-C base pairing.
  • Quantified sensor performance through quenching efficiency and binding mode analysis.

Main Results:

  • The dioxT-based sensor demonstrated high sensitivity for mercury ions.
  • Achieved a quenching efficiency of 80% in a 1:1 binding mode.
  • Exhibited high selectivity for mercury ions over other metal ions.

Conclusions:

  • The designed dioxT-based sensor is highly selective and sensitive for mercury detection.
  • Mismatched dioxT-T and dioxT-C base pairing facilitates effective mercury ion sensing.
  • This sensor shows promise for practical applications in mercury monitoring.