Magnetic properties of 1,3,5,6-tetraphenyl- and related verdazyls

Dormann, E.; Dyakonow, W.; Gotschy, B.; Lang, A.P.; Naarmann, H.; Pilawa, B.; Walker, Nigel; Winter, H.

doi:10.1016/0379-6779(93)90114-c

Cited by 12 publications

(3 citation statements)

References 5 publications

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“…Verdazyls, whose general structure is shown in Figure , are known to be quite stable radicals, and the peculiar magnetic properties of some of their derivatives have revived the interest of experimentalist and physicists . The functionalization of the basic molecule with phenyl groups, for instance, leads to one-dimensional stacked solids that can be considered as typical examples of antiferromagnetic Heisenberg chains 1 General formuals of verdazyl radicals. …”

Section: Introductionmentioning

confidence: 99%

Structure and Magnetic Properties of Oxoverdazyl Radicals and Biradicals by an Integrated Computational Approach

et al. 1999

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The structure, conformational behavior and magnetic properties of 1, 5-dimethyl-3-phenyl-6-oxoverdazyl radical and 1,1′,5,5′-tetramethyl-6, 6′-dioxo-3, 3′-biverdazyl biradical and of some related model compounds have been investigated by an integrated computational tool including an hybrid HF/DFT electronic method coupled to the polarizable continuum model for the description of solvent effects. The computed structural parameters are in agreement with the crystal structure for the radical and with refined post-HF computations for a simpler model compound. For the di-radical system a non planar structure is predicted both in vacuo and in solution.The nearly planar conformation found in the solid state can be ascribed to packing effect, as for the wellknown biphenyl molecule. The computed exchange coupling constant of the and 1, 1′, 5, 5′tetramethyl-6, 6′-dioxo-3, 3′-biverdazyl di-radical is in remarkable agreement with the experimental value when averaging effects of the inter-ring torsional motion are included in the calculations.

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Section: Introductionmentioning

confidence: 99%

Structure and Magnetic Properties of Oxoverdazyl Radicals and Biradicals by an Integrated Computational Approach

et al. 1999

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“…Modifying the TPV molecule, as did others [13,14], in order to optimize its exchange interaction in the solid state [15,16,17]. However, the carbon and nitrogen p-like orbitals give rise preferentially to quasi-one-dimensional intermolecular overlap of the wave functions and exchange interaction.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and magnetic order in poly-3-(3-thienyl-5-phenylverdazyl)thiophene

Hmyene¹,

Hakam²,

Naarmann³

et al. 2004

Ann. Chim. Sci. Mat.

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We report the synthesis and electropolymerization of 3-(3'-thienyl-5'-phenylverdazyl)thiophene with hexafluorophosphate as the counter anion, that gives solid materials with a high concentration of radical spins. A portion of the magnetic moments show magnetic order with spontaneous magnetization at temperatures of 10 K and below. The samples are characterized by measurement of field-and temperature-dependent static magnetic susceptibility, electron spin resonance and low-temperature magnetization curves.

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“…1.3-dithienyl-5-phenylverdazyl (DTpV, see inset to figure 1) was synthesized along the lines described in [9]. The samples of poly-DTPvlpFs analysed in this letter were obtained by electropolymerization using hexafluorophosphate (PF6) as the counter anion.…”

mentioning

confidence: 99%

Magnetic order in poly(1, 3-dithienyl-5-phenylverdazyl)

Hmyene¹,

Naarmann²,

Winter³

et al. 1994

J. Phys.: Condens. Matter

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Elecaopolymerization of 1,3dithienyl-5-phenylverdazyl with hexatluorophosphate as thecounter d o n gives solid materials witha high concentralion ofradical spins. A poltion ofthe magnetic moments show magnetic order with spontaneous magnetization at temperatures of 10 K and below. The samples a n characterized by measurement of field-and temperature-depndent static magnetic susceptibility, elecvon spin resonan= and low-temperature magnetization curves (hysteresis loops).

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Magnetic properties of 1,3,5,6-tetraphenyl- and related verdazyls

Cited by 12 publications

References 5 publications

Structure and Magnetic Properties of Oxoverdazyl Radicals and Biradicals by an Integrated Computational Approach

Structure and Magnetic Properties of Oxoverdazyl Radicals and Biradicals by an Integrated Computational Approach

Synthesis, characterization and magnetic order in poly-3-(3-thienyl-5-phenylverdazyl)thiophene

Magnetic order in poly(1, 3-dithienyl-5-phenylverdazyl)

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Magnetic properties of 1,3,5,6-tetraphenyl- and related verdazyls

Cited by 12 publications

References 5 publications

Structure and Magnetic Properties of Oxoverdazyl Radicals and Biradicals by an Integrated Computational Approach

Structure and Magnetic Properties of Oxoverdazyl Radicals and Biradicals by an Integrated Computational Approach

Synthesis, characterization and magnetic order in poly-3-(3-thienyl-5-phenylverdazyl)thiophene

Magnetic order in poly(1, 3-dithienyl-5-phenylverdazyl)

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Synthesis, characterization and magnetic order in poly-3-(3-thienyl-5-phenylverdazyl)thiophene