Commissariat a L'energie Atomique

Liliane Secourgeon

Paul Tordo

Nelly Kernevez

Mehdi Moussavi

Francois Le Moigne

Anne Mercier

Yves Berchadsky

A nitroxide radical of the formula (I) or (II): ##STR1## in which R.sub.1 and R.sub.2 are independently chosen from among the optionally deuterated alkyl, alkoxyl, dialkylaminyl and phenyl radicals, H, D or Cl; R.sub.3, R.sub.8 and R.sub.9 are independently chosen from among the optionally deuterated alkyl, alkoxyl and phenyl radicals; R.sub.4, R.sub.5, R.sub.6 and R.sub.7 are independently chosen from among the optionally deuterated alkyl, alkoxyl, dialkylaminyl and phenyl radicals, COOH, OH, OD, H, D, a halogen, COOR (in which R is an alkyl radical); R.sub.10 and R.sub.11 are independently chosen from among optionally deuterated alkyl, alkoxyl, dialkylaminyl and phenyl radicals, COOH, OH, OD, H, D, a halogen, COOR (in which R is an alkyl radical) or represent an oxygen atom linked with the cycle of the radical by a double bond is described.

Phosphorus-containing cyclic nitroxide free radicals

The invention concerns an octasubstituted lithium phthalocyanine responding to the formula: ##STR1## in which R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7 and R.sup.8, which are identical or different, represent an alkyl or alcoxy radical, possibly substituted by fluorine, and M represents Li or Li.sub.2. When M represents Li, this involves a lithium phthalocyanine octasubstituted like a radical which can be used in electronic paramagnetic resonance magnetometry. In this case, the substituents are preferably all identical and represent the methyl or methoxy radical.

Octasubstituted lithium phthalocyanines, their method of preparation and

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Saint Egreve, France

Liliane Secourgeon