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A coumarin-based two-photon probe for hydrogen peroxide.

Kai-Ming Zhang1, Wei Dou1, Peng-Xuan Li1

  • 1Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province and State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China.

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|October 14, 2014
PubMed
Summary
This summary is machine-generated.

A novel fluorescence probe accurately detects hydrogen peroxide (H2O2) using a D-PET mechanism. This sensitive probe is effective for imaging intracellular H2O2 levels in biological research.

Keywords:
Cell imagingCoumarinHydrogen peroxideProbeTwo-photon

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Area of Science:

  • Analytical Chemistry
  • Biochemistry
  • Chemical Biology

Background:

  • Hydrogen peroxide (H2O2) is a crucial reactive oxygen species involved in various biological processes.
  • Accurate detection and imaging of H2O2 are vital for understanding its role in cellular functions and diseases.
  • Existing H2O2 detection methods often lack selectivity, sensitivity, or applicability in biological systems.

Purpose of the Study:

  • To develop a novel, highly selective, and sensitive fluorescence probe for detecting hydrogen peroxide.
  • To investigate the probe's mechanism and performance using spectroscopic and computational methods.
  • To demonstrate the probe's utility in imaging intracellular H2O2 levels in living cells.

Main Methods:

  • Synthesis of a new fluorescence probe incorporating a benzil moiety for H2O2 recognition and quenching.
  • Utilized a donor-excited photoinduced electron transfer (D-PET) mechanism for fluorescence signaling.
  • Employed density functional theory (DFT) calculations to understand the probe's photophysical properties.
  • Evaluated probe performance using one-photon and two-photon fluorescence microscopy.

Main Results:

  • The probe was synthesized via a 6-step procedure and confirmed to function via a D-PET mechanism.
  • DFT calculations validated the benzil moiety as an effective fluorescence quencher.
  • The probe exhibited high selectivity for H2O2 over other reactive oxygen species.
  • Achieved a low detection limit of 0.09 μM for H2O2 with high sensitivity.
  • Successfully visualized intracellular H2O2 levels in cells using both one-photon and two-photon microscopy.

Conclusions:

  • A novel D-PET based fluorescence probe for sensitive and selective H2O2 detection has been successfully developed.
  • The probe demonstrates excellent performance, including a low detection limit and high selectivity, making it suitable for biological applications.
  • The probe's successful application in cell imaging highlights its potential for advancing research in chemical biology and diagnostics.