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Multiple phenyl ring appended Re-based complexes for strong visible light absorption and DNA binding.

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New rhenium(I) complexes with functionalized ligands show strong visible light absorption and bind to DNA. These findings highlight their potential for applications in photophysics and medicinal chemistry.

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Area of Science:

  • Organometallic Chemistry
  • Supramolecular Chemistry
  • Photophysics

Background:

  • Rhenium(I) complexes are versatile in catalysis and photophysics.
  • Acyclic complexes with N∩O bis-chelating ligands offer unique structural possibilities.
  • Functionalized ligands can influence intermolecular interactions and properties.

Purpose of the Study:

  • Synthesize and characterize novel facial-Rhenium(I) tricarbonyl complexes.
  • Investigate the structural features, particularly intermolecular interactions.
  • Evaluate the photophysical properties and DNA binding abilities.

Main Methods:

  • Synthesis and characterization of rhenium(I) complexes (1-3).
  • Single crystal X-ray diffraction for structural analysis.
  • UV-Vis absorption spectroscopy and circular dichroism for DNA binding studies.

Main Results:

  • Successfully synthesized and characterized three facial-Rhenium(I) complexes.
  • Observed significant intermolecular supramolecular interactions via external phenyl rings.
  • Exhibited strong absorption in the visible region (400-600 nm) with high molar absorptivity.
  • Demonstrated satisfactory DNA binding ability, likely through groove binding, evidenced by spectral changes.

Conclusions:

  • The synthesized rhenium(I) complexes possess unique structural motifs and interesting photophysical properties.
  • The external phenyl rings facilitate supramolecular assembly.
  • These complexes show promise for DNA interaction studies and potential applications in photochemistry.