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Yoo, Jung-Woo
Functional Hybrid Materials and Devices Lab(FHMDL)
Research Interests
  • Transport properties, spintronics, organic/molucular magnet, electronic, and spintronics,

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Organic Ferromagnetism: Trapping Spins in the Glassy State of an Organic Network Structure

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Title
Organic Ferromagnetism: Trapping Spins in the Glassy State of an Organic Network Structure
Author
Mahmood, JaveedPark, JungminShin, DongbinChoi, Hyun-JungSeo, Jeong-MinYoo, Jung-WooBaek, Jong-Beom
Keywords
organic ferromagnetism; p-TCNQ; organic network structure; spin trapping; 90° rotation; plastic magnet; pi-conjugated network; self-polymerization; stable neutral free radicals
Issue Date
201808
Publisher
CELL PRESS
Citation
CHEM, v., no., pp. -
Abstract
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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ISSN
2451-9294
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