Metal complexes as optical probes for DNA sensing and imaging

Area of Science:

• Coordination Chemistry
• Biophysical Chemistry
• Materials Science

Background:

• Transition and lanthanide metal complexes exhibit unique photophysical properties.
• Luminescent metal complexes are increasingly utilized in biological and biomedical applications.
• Nucleic acid detection and visualization are critical in molecular biology and diagnostics.

Purpose of the Study:

• To review recent literature on luminescent metal complexes as DNA optical probes.
• To highlight complexes that selectively bind to non-duplex DNA structures.
• To discuss applications in cellular imaging, biosensing, and phototherapy.

Main Methods:

• Literature survey of metal-based luminescent compounds for DNA detection.
• Analysis of complexes targeting specific DNA topologies (quadruplex, i-motif, mismatches).
• Review of applications in time-resolved and super-resolution microscopy.

Main Results:

• Various metal complexes (Re^I, Ru^II, Os^II, Ir^III, Pt^II, Eu^III, Tb^III) function as effective DNA optical probes.
• Selective binding to non-canonical DNA structures has been achieved.
• Successful implementation in advanced cellular imaging techniques is demonstrated.

Conclusions:

• Luminescent metal complexes are versatile tools for nucleic acid research.
• Selective targeting of DNA structures opens new avenues for diagnostics and therapeutics.
• Continued development promises enhanced capabilities in bioimaging and sensing.