Solution-Phase Conformation and Dynamics of Conjugated Isoindigo-Based Donor-Acceptor Polymer Single Chains

Area of Science:

• Materials Science
• Polymer Chemistry
• Computational Chemistry

Background:

• Conjugated polymers are essential for organic optoelectronics due to their semiconducting properties.
• Understanding polymer conformation at the molecular level is crucial for optimizing thin-film morphology.

Purpose of the Study:

• To investigate the solution-phase behavior of conjugated isoindigo-based donor-acceptor polymer single chains.
• To elucidate how chain length and solvent environment affect polymer conformation.

Main Methods:

• Atomistic molecular dynamics simulations were employed.
• Analysis of normal modes and persistence length was used to characterize conformations.

Main Results:

• A transition from rod-like to coil-like conformations was observed with increasing chain length.
• Conformations shifted from coil-like in good solvents to globule-like in poor solvents.

Conclusions:

• Conformational transitions of conjugated polymers are dependent on both chain length and solvent environment.
• These findings provide insights for accurately parameterizing higher-level models for conjugated polymer systems.