Near-infrared in vivo bioimaging using a molecular upconversion probe

Area of Science:

• Biomedical Imaging
• Molecular Probes
• Optical Spectroscopy

Background:

• Near-infrared (NIR) imaging offers advantages in biological applications due to deeper tissue penetration.
• Developing efficient molecular probes for NIR-to-NIR upconversion is crucial for improving imaging sensitivity and resolution.

Purpose of the Study:

• To demonstrate a novel molecular upconversion probe, NRh-1, for enhanced bioimaging applications.
• To evaluate the photophysical properties and in vivo behavior of the NRh-1 probe.

Main Methods:

• Synthesis and characterization of the NRh-1 molecular upconversion probe.
• Measurement of photostability and quantum yield.
• Assessment of rapid excretion capability and tissue penetration in biological models.

Main Results:

• The NRh-1 probe exhibited excellent photostability and a high quantum yield of up to 1.8%.
• The probe demonstrated rapid excretion capability from biological systems.
• NIR-to-NIR upconversion technique using NRh-1 resulted in improved signal-to-noise ratios and enhanced tissue penetration depth.

Conclusions:

• The NRh-1 molecular upconversion probe is a promising tool for advanced bioimaging.
• Its properties enable deeper and clearer imaging with reduced background noise.
• NRh-1 facilitates improved diagnostic and therapeutic monitoring in biological systems.