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Magnetic Bistability in Naphtho-1,3,2-dithiazolyl: Solid State Interconversion of a Thiazyl π-Radical and Its N–N σ-Bonded Dimer
- Source :
- Journal of the American Chemical Society. 140:3846-3849
- Publication Year :
- 2018
- Publisher :
- American Chemical Society (ACS), 2018.
-
Abstract
- Crystals of the heterocyclic radical naphtho-1,3,2-dithiazolyl NDTA display magnetic bistability with a well-defined hysteretic phase transition at Tc↓ = 128(2) K and Tc↑ = 188(2) K. The magnetic signature arises from a radical/dimer interconversion involving one of the two independent π-radicals in the P1 unit cell. Variable temperature X-ray crystallography has established that while all the radicals in HT-NDTA serve as paramagnetic (S = 1/2) centers, half of the radicals in LT-NDTA form closed-shell N–N σ-bonded dimers (S = 0) and half retain their S = 1/2 spin state. The wide window of bistability (60 K) may be attributed to the large structural changes that accompany the phase transition.
- Subjects :
- Phase transition
Spin states
Bistability
Chemistry
Radical
Dimer
Solid-state
02 engineering and technology
General Chemistry
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Biochemistry
Catalysis
0104 chemical sciences
3. Good health
Crystallography
Paramagnetism
chemistry.chemical_compound
Colloid and Surface Chemistry
Magnetic bistability
0210 nano-technology
Subjects
Details
- ISSN :
- 15205126 and 00027863
- Volume :
- 140
- Database :
- OpenAIRE
- Journal :
- Journal of the American Chemical Society
- Accession number :
- edsair.doi.dedup.....8a21f66e45a3013d4ab196a364b36f5e