Supramolecular Conjugated Polymer Materials for in Situ Pathogen Detection

Area of Science:

• Supramolecular chemistry
• Materials science
• Biotechnology

Background:

• Cationic poly(fluorene-co-phenylene) derivatives (PFP-NMe3+) are amphiphilic and interact with pathogen membranes.
• Supramolecular complexation with cucurbit[7]uril (CB[7]) alters the interaction profile of PFP-NMe3+ with pathogens.
• Amantadine (AD) can reversibly disassemble the PFP-NMe3+/CB[7] complex.

Purpose of the Study:

• To develop a rapid and sensitive optical sensor for pathogen detection and discrimination.
• To explore the use of a PFP-NMe3+/CB[7] supramolecular complex for in situ pathogen analysis.
• To compare the sensor's performance with conventional pathogen detection methods.

Main Methods:

• Formation of a supramolecular complex between PFP-NMe3+ and CB[7].
• Utilizing the disassembly of the complex by AD as a trigger for optical signal change.
• Applying the optical signal changes for the detection and differentiation of various pathogens.

Main Results:

• The PFP-NMe3+/CB[7] complex enables simple, rapid, and in situ optical detection of multiple pathogens.
• The sensor successfully identified Gram-negative bacteria, Gram-positive bacteria, and fungi.
• The sensor could also discriminate between different strains of the same species and analyze mixed pathogen samples.
• Detection and stratification of diverse pathogen types were achieved in 2 hours, significantly faster than traditional methods.

Conclusions:

• The PFP-NMe3+/CB[7] supramolecular complex serves as a versatile optical sensor for broad-spectrum pathogen detection.
• This sensor offers a rapid, label-free, and cost-effective alternative to conventional pathogen identification techniques.
• The developed sensor demonstrates potential for clinical diagnostics and microbial surveillance.