Mechanochemical Approach to a Monocationic Asymmetric Monomethine Cyanine Dye for Nucleic Acid Analysis and...

Area of Science:

• Organic Chemistry
• Photophysics
• Biophysical Chemistry

Background:

• Cyanine dyes are widely used in biological imaging and sensing.
• Developing novel dyes with enhanced properties is crucial for advancing molecular diagnostics.
• Asymmetric monomethine cyanine dyes offer tunable photophysical properties.

Purpose of the Study:

• To synthesize a novel asymmetric monomethine cyanine dye, CHLoris (CHL).
• To investigate the aggregation behavior and photophysical properties of CHL.
• To evaluate CHL's performance as a potential RNA-sensitive fluorescent probe.

Main Methods:

• Mechanochemical synthesis via modified Knoevenagel-type condensation.
• UV/VIS absorption spectroscopy to study aggregation.
• Density Functional Theory (DFT) and Time-Dependent DFT (TDDFT) calculations.
• Photophysical studies in the presence of DNA and RNA.

Main Results:

• Successful synthesis of CHL using an environmentally friendly mechanochemical approach.
• CHL forms aggregates in aqueous media, as confirmed by UV/VIS spectroscopy and DFT/TDDFT calculations.
• CHL exhibits higher sensitivity towards RNA compared to the commercial dye Thiazole Orange (TO).

Conclusions:

• CHL is a promising novel cyanine dye synthesized via a sustainable method.
• The aggregation behavior of CHL in aqueous solution is significant.
• CHL demonstrates superior sensitivity for RNA detection, suggesting potential applications in molecular biology and diagnostics.