A novel Schiff base derivative: Synthesis, two-photon absorption properties and application for bioimaging

Area of Science:

• Organic Chemistry
• Photophysics
• Bioimaging

Background:

• Schiff base derivatives are versatile organic compounds.
• Developing targeted fluorescent probes for cellular imaging is crucial.
• Mitochondria are vital organelles for cellular function and disease research.

Purpose of the Study:

• To design and synthesize a novel donor-π-acceptor-π-donor (D-π-A-π-D') Schiff base derivative (L).
• To investigate the photophysical properties and cellular imaging capabilities of compound L.
• To evaluate compound L as a potential fluorescent probe for mitochondria in living cells.

Main Methods:

• Single-crystal X-ray diffraction for structural confirmation.
• Experimental and theoretical methods to study photophysical properties.
• Confocal microscopy for cellular imaging and targeting studies.

Main Results:

• Compound L exhibits a large Stokes shift and a moderate two-photon absorption (2PA) cross-section in the near-infrared (NIR) region.
• Compound L demonstrates cell permeability and specific targeting of the mitochondria compartment.
• The synthesized Schiff base derivative shows low cytotoxicity.

Conclusions:

• The novel D-π-A-π-D' Schiff base derivative (L) possesses favorable photophysical properties for bioimaging.
• Compound L is a promising, non-toxic fluorescent probe for visualizing mitochondria in living cells.
• This study highlights the potential of Schiff base derivatives in advanced cellular imaging applications.