Nucleobase-functionalized conjugated polymer for detection of copper(II)

Area of Science:

• Supramolecular chemistry
• Polymer science
• Bioconjugate materials

Background:

• Thiophene derivatives and polythiophenes are explored for complex functions via supramolecular organization.
• DNA's phosphate backbone is a target for synthetic modification in functional materials.

Purpose of the Study:

• Synthesize and characterize a conjugated polymer (PTT) mimicking DNA structure with thymidine bases and polythiophene backbones.
• Investigate PTT's fluorescence response to copper ions (Cu2+) in aqueous environments.
• Establish PTT as a sensitive and selective sensor for Cu2+ detection.

Main Methods:

• Synthesis of a novel conjugated polymer (PTT) incorporating thymidine side chains.
• Characterization of PTT's structural and photophysical properties.
• Fluorescence spectroscopy to monitor PTT's interaction with Cu2+ ions.

Main Results:

• PTT exhibits efficient fluorescence quenching upon binding with Cu2+ ions in water.
• The quenching mechanism involves electron transfer and Cu2+-mediated interpolymer aggregation.
• PTT demonstrates selective and sensitive detection of Cu2+ ions.

Conclusions:

• PTT serves as an effective fluorescent sensor for Cu2+ detection in aqueous media.
• The study highlights the potential of nucleobase-functionalized polymers for transition metal sensing.
• Findings offer new avenues for designing responsive materials based on DNA-inspired structures.