Anomalous Behavior of Paramagnetic Susceptibility of TEMPAD Biradical

Nakajima, Akira; Nishiguchi, Hiroaki; Deguchi, Yasuo

doi:10.1143/jpsj.24.1175

Cited by 13 publications

(3 citation statements)

References 3 publications

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“…3k (2) avec N : nombre de spins par mole, g : facteur de Land4, fib : magn6ton de Bohr. Pour un radical nitroxyde, g 4tant pris 6gal h 2,0055, la valeur th6orique de C M est 0,377 erg K G -2 tool -1 (0,754 erg K G -2 mo1-1 pour un biradical)t.…”

Section: Ng2~b~s(s + 1)unclassified

“…(2). Aucune interaction d'6change entre spins n'a pu ~tre d6tect6e h la pr6cision de nos exp6riences.…”

Section: Composes a Trois Spinsunclassified

“…ETUDE DE L' HAMILTONIEN D' ECHANGE--CAS OU L' ECHANGE EST NEGATIFQue]ques radicaux ont dfij{t fait l'objet d'~tudes magndtiques[2][3][4][5], et les anomalies rencontr6es, de caract6re antiferromagnfitique, ont fit6 interprdt6es en consid6rant que les radicaux peuvent former des chaines magn6tiques lin6aires L'~cart du facteur de Land~, g, h la valeur 2 est faible, ceci implique un faible couplage spin-orbite et, comme cons6quence, une interaction d'6change isotrope entre spins, que l'on peut donc representer par un hamiltonien de Heisenberg.Des calculs ont fit6 effectuds par Duffy et Barr[6] h partir de l'hamiltonien Nous examinons les deux cas limites, puis le cas gdnfral de cet hamiltonien.…”

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Magnetisme dans certains composes organiques : les radicaux libres stables nitroxydes

Veyret

Blaise

1973

Molecular Physics

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Nous faisons une br~ve revue des principaux modules th6oriques propos6s pour interpr6ter les propri6t6s magn6tiques des syst~mes organiques pr6-sentant des moments magn6tiques localis6s et appliquons ces modules aux radicaux libres nitroxydes. Le signe et la grandeur de 1'6change ont 6t6 mesur6es sur une s6rie de ces compos6s.We give a brief review of the main theoretical models proposed to interpret the magnetic properties of organic systems with localized magnetic moments. We apply these models to nitroxyde free radicals. The sign and magnitude of the exchange interactions have been measured on a series of such compounds.

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Section: Ng2~b~s(s + 1)unclassified

“…(2). Aucune interaction d'6change entre spins n'a pu ~tre d6tect6e h la pr6cision de nos exp6riences.…”

Section: Composes a Trois Spinsunclassified

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Magnetisme dans certains composes organiques : les radicaux libres stables nitroxydes

Veyret

Blaise

1973

Molecular Physics

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Mechanism of copper(II) adsorption by polyvinyl polyacrylate

Nakajima

Sakai

Yamauchi

2006

J of Applied Polymer Sci

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The mechanism of copper adsorption by polyvinyl polyacrylate (PVPA) was examined using ESR and magnetic measurements. The copper adsorption by PVPA obeyed Langmuir adsorption isotherm with the maximum adsorption amounts of 4.17 mmol g À1 adsorbent, being larger than those of uranium adsorption. Though copper in the solution was completely adsorbed by the resin above pH 4, the ESR intensity was remained low level and only increased above pH 8. The ESR spectrum of Cu(II) ion in PVPA are axial type with tetragonally distorted octahedral symmetry, having parameters of(pH 9). The absorption peaks originated from Cu(II)-Cu(II) dimer was also observed (pH 5). The paramagnetic susceptibility of PVPA adsorbed Cu(II) ion at pH 5 explained by the dimer model with |J| ¼ 220 K. These results suggested that most of copper was adsorbed and formed dimer in PVPA, being similar to that in Cu(II)-acetate monohydrate.

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22.1.4.11.3 X = 2 atoms

Forrester¹

Organic Cation Radicals and Polyradicals. Index of Substances for Volumes II/1 and II/9

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Anomalous Behavior of Paramagnetic Susceptibility of TEMPAD Biradical

Cited by 13 publications

References 3 publications

Magnetisme dans certains composes organiques : les radicaux libres stables nitroxydes

Magnetisme dans certains composes organiques : les radicaux libres stables nitroxydes

Mechanism of copper(II) adsorption by polyvinyl polyacrylate

22.1.4.11.3 X = 2 atoms

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