The spin magnetism of α, α′-diphenyl-β- picrylhydrazyl (DPPH)

P. Grobet; L. Van Gerven; A. Van Den Bosch

doi:10.1063/1.435589

The spin magnetism of α, α′-diphenyl-β- picrylhydrazyl (DPPH)

P. Grobet, L. Van Gerven, A. Van Den Bosch

Research output › peer-review

Abstract

Magnetic susceptibility measurements are performed on DPPH-benzene complex and solvent-free DPPH in the temperature range 300-2.2 K and in a field range 6-20 kOe. The experimental values of the DPPH-benzene complex fit the Brillouin function for noninteracting paramagnetic centers (S = 1/2); at temperatures below 4 K; however, a systematic deviation is observed. The values in solvent-free DPPH obey the same law at temperatures above 150 K. Below this temperature a strong deviation occurs, and below 10 K the susceptibility even decreases with decreasing temperature. This deviation is attributed to electron spin pairing. In solvent-free DPPH less than 1 % of paramagnetic centra is left at 2.2 K.

Original language	English
Pages (from-to)	5225-5230
Number of pages	6
Journal	The Journal of Chemical Physics
Volume	68
Issue number	11
DOIs	https://doi.org/10.1063/1.435589
State	Published - 1978

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

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10.1063/1.435589

Cite this

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title = "The spin magnetism of α, α′-diphenyl-β- picrylhydrazyl (DPPH)",

abstract = "Magnetic susceptibility measurements are performed on DPPH-benzene complex and solvent-free DPPH in the temperature range 300-2.2 K and in a field range 6-20 kOe. The experimental values of the DPPH-benzene complex fit the Brillouin function for noninteracting paramagnetic centers (S = 1/2); at temperatures below 4 K; however, a systematic deviation is observed. The values in solvent-free DPPH obey the same law at temperatures above 150 K. Below this temperature a strong deviation occurs, and below 10 K the susceptibility even decreases with decreasing temperature. This deviation is attributed to electron spin pairing. In solvent-free DPPH less than 1 % of paramagnetic centra is left at 2.2 K.",

author = "P. Grobet and {Van Gerven}, L. and {Van Den Bosch}, A.",

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N2 - Magnetic susceptibility measurements are performed on DPPH-benzene complex and solvent-free DPPH in the temperature range 300-2.2 K and in a field range 6-20 kOe. The experimental values of the DPPH-benzene complex fit the Brillouin function for noninteracting paramagnetic centers (S = 1/2); at temperatures below 4 K; however, a systematic deviation is observed. The values in solvent-free DPPH obey the same law at temperatures above 150 K. Below this temperature a strong deviation occurs, and below 10 K the susceptibility even decreases with decreasing temperature. This deviation is attributed to electron spin pairing. In solvent-free DPPH less than 1 % of paramagnetic centra is left at 2.2 K.

AB - Magnetic susceptibility measurements are performed on DPPH-benzene complex and solvent-free DPPH in the temperature range 300-2.2 K and in a field range 6-20 kOe. The experimental values of the DPPH-benzene complex fit the Brillouin function for noninteracting paramagnetic centers (S = 1/2); at temperatures below 4 K; however, a systematic deviation is observed. The values in solvent-free DPPH obey the same law at temperatures above 150 K. Below this temperature a strong deviation occurs, and below 10 K the susceptibility even decreases with decreasing temperature. This deviation is attributed to electron spin pairing. In solvent-free DPPH less than 1 % of paramagnetic centra is left at 2.2 K.

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