Control of Magnetic Interactions in Polyarylmethyl Triplet Diradicals Using Steric Hindrance

Andrzej Rajca; Suchada Utamapanya; Jiangtien Xu

doi:10.1021/ja00024a032

Control of Magnetic Interactions in Polyarylmethyl Triplet Diradicals Using Steric Hindrance

Andrzej Rajca, Suchada Utamapanya, Jiangtien Xu

Research output: Contribution to journal › Article › peer-review

74 Scopus citations

Abstract

Three polyarylmethyl triplet diradicals are prepared by oxidation of the corresponding carbodianions. Solid-state studies of the diradicals using SQUID show an onset of short-range ferromagnetic interactions at temperatures below 4 K for diradical 3^2•and antiferromagnetic interactions below 70 K for diradicals 2^2• and 4^2•. The diradicals and the corresponding carbodianions in solution are characterized using ESR, NMR, and UV-vis spectroscopy, and voltammetry.

Original language	English (US)
Pages (from-to)	9235-9241
Number of pages	7
Journal	Journal of the American Chemical Society
Volume	113
Issue number	24
DOIs	https://doi.org/10.1021/ja00024a032
State	Published - Nov 1 1991
Externally published	Yes

ASJC Scopus subject areas

Catalysis
Chemistry(all)
Biochemistry
Colloid and Surface Chemistry

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abstract = "Three polyarylmethyl triplet diradicals are prepared by oxidation of the corresponding carbodianions. Solid-state studies of the diradicals using SQUID show an onset of short-range ferromagnetic interactions at temperatures below 4 K for diradical 32•and antiferromagnetic interactions below 70 K for diradicals 22• and 42•. The diradicals and the corresponding carbodianions in solution are characterized using ESR, NMR, and UV-vis spectroscopy, and voltammetry.",

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AU - Xu, Jiangtien

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N2 - Three polyarylmethyl triplet diradicals are prepared by oxidation of the corresponding carbodianions. Solid-state studies of the diradicals using SQUID show an onset of short-range ferromagnetic interactions at temperatures below 4 K for diradical 32•and antiferromagnetic interactions below 70 K for diradicals 22• and 42•. The diradicals and the corresponding carbodianions in solution are characterized using ESR, NMR, and UV-vis spectroscopy, and voltammetry.

AB - Three polyarylmethyl triplet diradicals are prepared by oxidation of the corresponding carbodianions. Solid-state studies of the diradicals using SQUID show an onset of short-range ferromagnetic interactions at temperatures below 4 K for diradical 32•and antiferromagnetic interactions below 70 K for diradicals 22• and 42•. The diradicals and the corresponding carbodianions in solution are characterized using ESR, NMR, and UV-vis spectroscopy, and voltammetry.

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Control of Magnetic Interactions in Polyarylmethyl Triplet Diradicals Using Steric Hindrance

Abstract

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