A two-color fluorogenic carbene complex for tagging olefins via metathesis reaction

Area of Science:

• Organometallic Chemistry
• Materials Science
• Chemical Biology

Background:

• Development of novel fluorogenic probes is crucial for advanced imaging techniques.
• Ruthenium (II) complexes offer unique photophysical properties for chemical sensing and labeling.
• Boron dipyrromethene (BODIPY) dyes are known for their bright fluorescence and photostability.

Purpose of the Study:

• To synthesize and characterize a fluorogenic ruthenium (II) carbene complex.
• To investigate the complex's ability to introduce a BODIPY moiety into target double bonds via metathesis.
• To demonstrate the utility of this labeling strategy for interfacial science and biorthogonal ligation.

Main Methods:

• Synthesis of a ruthenium (II) carbene complex featuring a directly connected chromophore.
• Metathesis reaction to tag terminal double bonds on immobilized styrene.
• Characterization using 19F-NMR, optical spectroscopy, and single-molecule trajectories.

Main Results:

• Successful synthesis of the fluorogenic ruthenium (II) carbene complex.
• Demonstration of BODIPY moiety introduction into double bonds via metathesis.
• Formation of two distinguishable fluorescent products in a model reaction with styrene.
• Validation of the labeling scheme on immobilized surfaces.

Conclusions:

• The developed ruthenium (II) carbene complex enables efficient and selective fluorescent labeling of double bonds.
• This method provides a powerful tool for interfacial science and biorthogonal ligation.
• The dual-fluorescence outcome offers potential for multiplexed imaging applications.
• Further applications in super-resolution imaging are anticipated.