Octasubstituted lithium phthalocyanines, their method of preparation and their use in EPR (electronic paramagnetic resonance) magnetometry
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United States of America Patent
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Feb 26, 1991
Grant Date -
N/A
app pub date -
Jul 14, 1989
filing date -
Jul 20, 1988
priority date (Note) -
Expired
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Abstract
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.
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