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Labeling DNA Probes03:31

Labeling DNA Probes

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DNA probes are fragments of DNA labeled with a reporter tag to enable their detection or purification. The resulting labeled DNA probes can then hybridize to target nucleic acid sequences through complementary base-pairing, and may be used to recover or identify these regions.
Radioisotopes, fluorophores, or small molecule binding partners like biotin or digoxigenin, are the most widely used reporter tags for labeling DNA probes. These labels can be attached to the probe DNA molecule via...
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  9. Optical Properties Of Materials
  11. Strategic Acetylation Of Bodipy Dyes: Tuning Excited-state Geometry For The Design Of Fluorogenic Sensing Probes

Strategic Acetylation of BODIPY Dyes: Tuning Excited-State Geometry for the Design of Fluorogenic Sensing Probes

Yeri Kim1, Youngmi Kim1

  • 1Department of Chemistry and Research Institute of Basic Sciences, Kyung Hee University, 126 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Korea.

Organic Letters
|June 13, 2025

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View abstract on PubMed

Summary
This summary is machine-generated.

Strategic modifications to BODIPY dyes alter their light-emitting properties. Acetylation and alkylation control fluorescence, enabling new sensors for detecting nucleophiles and viscosity changes.

Area of Science:

  • Organic chemistry
  • Photophysics
  • Materials science

Background:

  • BODIPY dyes are versatile fluorescent molecules with tunable properties.
  • Understanding structure-property relationships is crucial for designing advanced functional materials.

Purpose of the Study:

  • To investigate how strategic acetylation and alkylation impact the photophysical characteristics of BODIPY dyes.
  • To explore the potential of modified BODIPY dyes as sensors for nucleophilic species and viscosity.

Main Methods:

  • Synthesis of modified BODIPY dyes (D8COMe, D2COMe, T8COMe) with specific acetylation and alkylation patterns.
  • Photophysical characterization including absorption, emission, and fluorescence quantum yield measurements.
  • Computational modeling to elucidate structure-property relationships.

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Main Results:

  • Meso-acetylation (D8COMe) induced a large Stokes shift via excited-state reorganization.
  • C2-acetylation (D2COMe) maintained typical BODIPY spectral features.
  • Methylation at C1/C7 positions (T8COMe) modulated fluorescence efficiency and introduced viscosity-dependent emission.
  • Computational analysis confirmed structural distortion as the key factor in fluorescence modulation.

Conclusions:

  • Strategic functionalization of BODIPY dyes offers a powerful approach to tune their photophysical properties.
  • Modified BODIPY dyes show promise as sensitive probes for detecting nucleophilic species and monitoring viscosity.