Organic Ferromagnetism: Trapping Spins in the Glassy State of an Organic Network Structure
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- Organic Ferromagnetism: Trapping Spins in the Glassy State of an Organic Network Structure
- Mahmood, Javeed; Park, Jungmin; Shin, Dongbin; Choi, Hyun-Jung; Seo, Jeong-Min; Yoo, Jung-Woo; Baek, Jong-Beom
- organic ferromagnetism; p-TCNQ; organic network structure; spin trapping; 90° rotation; plastic magnet; pi-conjugated network; self-polymerization; stable neutral free radicals
- Issue Date
- CELL PRESS
- CHEM, v., no., pp. -
- The unique organic π-conjugated network structure was synthesized in trifluoromethanesulfonic acid at 155°C by self-polymerization of the tetracyanoquinodimethane (TCNQ) monomer in an efficient way. Highly stable free radicals achieved through the self-polymerization of TCNQ, these radicals originate from the 90° rotation of cyclohexadiene rings into phenyl rings and 120° ferromagnetic order around the triazine rings. The presence of unpaired electrons (radicals) in p-TCNQ was established by solid-state electron spin resonance spectroscopy, and the long-range magnetic ordering through the network was characterized by a Quantum Design SQUID-VSM. Designing and manipulating the spins in polymer networks via organic methodologies will provide alternative approaches for versatile future applications of plastic magnets.
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