Rigidochromic Fluorophores Identify Single Monomer Mutation on Synthetic Macromolecular Chain
Huifen Zhu1,2,3,4, Huacan Wu1,2, Haizhou Pei1,2,4
1State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, People's Republic of China.
Angewandte Chemie (International Ed. in English)
|August 5, 2026
Summary
This study introduces a novel optical method for detecting single monomer mutations in polymers up to 1000 units. The technique uses a special fluorophore to visually distinguish complex polymer structures, aiding material science research.
Area of Science:
- Polymer Chemistry
- Materials Science
- Spectroscopy
Background:
- Detecting monomer mutations in polymers is crucial for functional materials, especially biomacromolecules.
- Current methods face challenges in accurately identifying single monomer variations within long polymer chains.
Purpose of the Study:
- To develop an optical strategy for sensitive detection of single monomer mutations in polymers.
- To enable visual discrimination between complex polymer architectures like copolymers and blends.
Main Methods:
- Utilized a rigidochromic fluorophore that forms charge-transfer complexes (CTCs) with polymer chains via polar-π interactions.
- Analyzed red-shifted emission changes in CTCs resulting from altered intra- and interchain interactions and through-space conjugation (TSC) due to monomer mutations.
- Achieved visual differentiation of random copolymers, block copolymers, and homopolymer blends.
Main Results:
- Demonstrated the ability to detect single monomer mutations in polymer chains up to 1000 repeating units.
- Successfully distinguished between poly(A-r-B), poly(A-b-B), and poly A + poly B with identical compositions and molecular weights.
- Observed distinct emission variations in CTCs correlating with monomer mutations and structural changes.
Conclusions:
- The developed optical strategy offers a powerful platform for identifying monomer mutations in polymers.
- This method facilitates high-throughput polymer screening and real-time monitoring of polymer structural evolution.
- Provides a unique capability for characterizing complex polymer structures inaccessible to conventional techniques.
