Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1993-02-05
1994-11-22
Shah, Mukund J.
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
540140, C07D48722
Patent
active
053670701
ABSTRACT:
Ferromagnetic porphin compounds may be produced by heating a non-ferromagnetic porphin compound having a central transition metal atom in the non-ferromagnetic porphin molecule and at least some of the pyrrole rings of the non-ferromagnetic porphin molecule having benzene or phenyl groups substituted on or integral with said rings. The non-ferromagnetic porphin compound is heated in the substantial absence of oxygen to a temperature sufficient to pyrolyze at least a portion of the benzene or phenyl groups of the non-ferromagnetic porphin compound. A ferromagnetic porphin compound is formed, which is inherently magnetic and is capable of retaining magnetism when exposed to a magnetic field. The resulting ferromagnetic porphin compounds retain their ferromagnetic properties even up to about 473.degree. K. in air and to much higher temperatures in vacuum or an inert atmosphere.
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Kopeley Nikolai
Nath Amar
Tyagi Som D.
Drexel University
Shah Mukund J.
Sripada Pavanaram K.
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