Magnetic Ordering in a High‐Spin Donor–Acceptor Conjugated Polymer
Abstract
The development of open‐shell organic molecules that magnetically order at room temperature,which can be practically applied, remains a grand challenge in chemistry, physics, and materials science. Despite the exploration of vast chemical space, design paradigms for organic paramagnetic centers generally result in unpaired electron spins that are unstable or isotropic. Here, a high‐spin conjugated polymer is demonstrated, which is composed of alternating cyclopentadithiophene and benzo[1,2‐c;4,5‐c′]bis[1,2,5]thiadiazole heterocycles, in which macromolecular structure and topology coalesce to promote the spin center generation and intermolecular exchange coupling. Electron paramagnetic resonance (EPR) spectroscopy is consistent with spatially localized spins, while magnetic susceptibility measurements show clear anisotropic spin ordering and exchange interactions that persist at room temperature. The application of long‐range π‐correlations for spin center generation promotes remarkable stability. This work offers a fundamentally new approach to the implementation of this long‐sought‐after physical phenomenon within organic materials and the integration of manifold properties within emerging technologies.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Oct 10, 2022
- Source ID
- 10.1002/adma.202206161
Entities
People
- Chih‐ting Liu
- Daniel J Adams
- Jason D Azoulay
- Kevin S. Mayer
- Michael E. Steelman
- Michael K Bowman
- Molly Lockart
- Naresh Eedugurala
- Paramasivam Mahalingavelar
- Xiaodan Gu
- Yunfei Wang
Organizations
- Engineer Research and Development Center
- National Science Foundation
- Office of Basic Energy Sciences
- Office of Science
- United States Department of Energy
- University of Alabama
- University of Southern Mississippi