Octasubstituted lithium phthalocyanines, their method of preparation and their use in EPR (electronic paramagnetic resonance) magnetometry
US4996311A · kind A · utility
11Cited by
1References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 14, 1989 |
| Grant date | Feb 26, 1991 |
| Priority date | — |
| Expiry date | Jul 14, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/24
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.