SHORT-RANGE FERROMAGNETIC EXCHANGE IN 1,5,6-TRIPHENYL-3-(4-NITROPHENYL)-VERDAZYL

被引：5

作者：

ALLEMAND, PM

SRDANOV, G

WUDL, F

机构：

[1] Institute for Polymers, Organic Solids Department of Physics, Chemistry University of California, Santa Barbara

来源：

SYNTHETIC METALS | 1991年 / 43卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0379-6779(91)91278-I

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

1,5,6-Triphenyl-3-(4-nitrophenyl)-verdazyl has been synthesized and characterized by X-ray diffraction, magnetic susceptibility, ESR, and other spectroscopic methods, as well as elemental analysis. The product (chi-spin)T was found to increase below 100 K to reach a maximum (0.529 emu.K/mole) at 3.9 K. From 100 to 30 K the spin susceptibility follows the Curie-Weiss law with C = 0.382 and THETA = +1.6 K, indicating ferromagnetic interactions between S = 1/2 species. A strong deviation from the Curie-Weiss law was observed below 30 K where the susceptibility reaches a maximum chi-spin = 0.241 emu/mole at 2.15 K. Using the spin density rule proposed by McConnell, an attempt was made to correlate the unusual magnetic properties of this solid with its structure.

引用

页码：3245 / 3248

页数：4

共 13 条

[1]

ALLEMAND PM, UNPUB

[2] FERROMAGNETIC INTERMOLECULAR INTERACTION OF THE ORGANIC RADICAL, 2-(4-NITROPHENYL)-4,4,5,5-TETRAMETHYL-4,5-DIHYDRO-1H-IMIDAZOLYL-1-OXY 3-OXIDE [J].

AWAGA, K ;

MARUYAMA, Y .

CHEMICAL PHYSICS LETTERS, 1989, 158 (06) :556-558

[3] FERROMAGNETIC INTERMOLECULAR INTERACTIONS IN A SERIES OF ORGANIC MIXED-CRYSTALS OF GALVINOXYL RADICAL AND ITS PRECURSORY CLOSED SHELL COMPOUND [J].

AWAGA, K ;

SUGANO, T ;

KINOSHITA, M .

JOURNAL OF CHEMICAL PHYSICS, 1986, 85 (04) :2211-2218

[4] TWO-DIMENSIONAL NETWORK OF THE FERROMAGNETIC ORGANIC RADICAL, 2-(4-NITROPHENYL)-4,4,5,5-TETRAMETHYL-4,5-DIHYDRO-1H-IMIDAZOL-1-OXYL 3-N-OXIDE [J].

AWAGA, K ;

INABE, T ;

NAGASHIMA, U ;

MARUYAMA, Y .

JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 1989, (21) :1617-1618

[5] FERROMAGNETIC AND ANTIFERROMAGNETIC INTERMOLECULAR INTERACTIONS OF ORGANIC RADICALS, ALPHA-NITRONYL NITROXIDES .2. [J].

AWAGA, K ;

MARUYAMA, Y .

JOURNAL OF CHEMICAL PHYSICS, 1989, 91 (04) :2743-2747

[6] MAGNETIC PROPERTIES OF VERDAZYL FREE-RADICALS .3. ANOMALOUS MAGNETIC BEHAVIOR OF SYMMETRICAL TRIPHENYLVERDAZYL [J].

AZUMA, N ;

YAMAUCHI, J ;

MUKAI, K ;

OHYANISH.H ;

DEGUCHI, Y .

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 1973, 46 (09) :2728-2734

[7] HIGH-TEMPERATURE SERIES EXPANSIONS FOR SPIN-1-2 HEISENBERG MODEL BY METHOD OF IRREDUCIBLE REPRESENTATIONS OF SYMMETRIC GROUP [J].

BAKER, GA ;

RUSHBROOKE, GS ;

GILBERT, HE .

PHYSICAL REVIEW, 1964, 135 (5A) :1272-+

[8] LINEAR MAGNETIC CHAINS WITH ANISOTROPIC COUPLING [J].

BONNER, JC ;

FISHER, ME .

PHYSICAL REVIEW, 1964, 135 (3A) :A640-+

[9] LCAO-MO CALCULATIONS ON VERDAZYLS [J].

FISCHER, PHH .

TETRAHEDRON, 1967, 23 (04) :1939-&

[10]

KONIG E, 1966, NUMERICAL DATA FUNCT, V2

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