Anomaly in the χ-TCurve of Galvinoxyl Radical

Low-temperature Electronic Paramagnetic Resonance Measurements of TEMPO and 4-Hydroxy-TEMPO Benzoate for Purity Analyses by the Effective Magnetic-moment Method

“…The effective magnetic moment method seems to give uncertainty of approximately 6 -8% for purity of the DPPH. Mukai, et al 26 reported that the galvinoxyl had shown the maximum of the magnetic susceptibility at 82.5 K. Most manufacturers of galvinoxyl do not officially announce purity values of their high-purity galvinoxyl chemicals, while for the other commercial radicals listed above, the purities by the GC method or the titration method have been given by their manufacturers. Although it might be somewhat difficult to determine the purity of galvinoxyl with good accuracy, purity quantified by the effective magnetic-moment method might be useful information for practitioners of EPR.…”

High‐Temperature Ferromagnetism of a Discotic Liquid Crystal Dilutely Intercalated with Iron(III) Phthalocyanine

“…[ 3 ] However, many attempts have also been made to prepare RT or hightemperature ferromagnetic materials based on pure organic as well as organometallic compositions. In the approach using pure organic materials, many research groups have studied the ferromagnetism of diverse organic compounds, including galvinoxyl, [ 7 ] high-spin polycarbenes, [ 8 ] tanol suberate, [ 9 ] and conjugate conducting oligomers [ 10 ] with appropriate doping, in the hope that magnetism could be achieved through ferromagnetic coupling between the organic radicals. However, they did not show any magnetic long-range order at RT, although it was claimed that some of them [ 11 ] were ferromagnetic at very low temperatures.…”

Magnetism of Carbon‐Based Materials

“…After the three mechanisms for the stabilization of ferromagnetic coupling in molecular solids have been predicted, several attempts have been made to synthesize magnetic polymers, and interesting magnetic properties have been observed for vinil polymers containing nitroxile radicals in the side chain of the mer unit [33], in galvanoxyl radical [34] and mixture of galvanoxyl and hydrogalvanoxyl; the latter substance is considered as an assembly of segments consisting of galvanoxyl radicals, ferromagnetically coupled to each other [35] The ferromagnetic interaction in galvanoxyl radical was shown to extend one-dimensionally . Several polymers have been prepared under this prescription, among them ferromagnetic poly-BIPO and poly-BIPENO, described above.…”