Iron complexes for bleach activation and stereospecific oxidation
AssigneeRegents of the University of Minnesota
InventorsLawrence Que, Jr., Cheal Kim, Jinheung Kim, Yan Zang
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Abstract
A bleach and oxidation catalyst is provided comprising a catalytically active iron complex which can activate hydrogen peroxide or peroxy acids, for example.
Claims34
An Fe-complex, or precursor thereof, having the following formula:
- {L.sub.m Fe.sub.m X.sub.n }.sup.z Y.sub.q
- wherein:
- (a) Fe is iron in the II, III, IV, or V oxidation state;
- (b) X represents a coordinating species of the formula RCN, which is capable of coordinating to the Fe and being displaced by a peroxy compound or precursor thereof, wherein R is an organic group;
- (c) L represents a tetradentate nontetraazamacrocyclic ligand, which is an organic molecule containing heteroatoms, capable of coordinating to the Fe through all or some of its heteroatoms;
- (d) m is an integer ranging from 1 to 3;
- (e) n is an integer ranging from 2 to 7;
- (f) Y represents a counter ion, the type of which is dependent on the charge of the complex;
- (g) z denotes the charge of the complex and is an integer which is positive, zero, or negative;
- and
- (h) q=z/{charge Y}.
A method of stereospecifically oxidizing an organic substrate comprising combining the substrate with a peroxy compound, precursor thereof, or mixtures thereof, and with an oxidatively resistant Fe-complex catalyst, or precursor thereof, of the formula:
- {L.sub.m Fe.sub.m X.sub.n}.sup.z Y.sub.q
- wherein:
- (a) Fe is iron in the II, III, IV, or V oxidation state;
- (b) X represents a coordinating species of the formula RCN, which is capable of coordinating to the Fe and being displaced by a peroxy compound or precursor thereof, wherein R is an organic group;
- (c) L represents a tetradentate nontetraazamacrocyclic ligand, which is an organic molecule containing heteroatoms, capable of coordinating to the Fe through all or some of its heteroatoms;
- (d) m is an integer ranging from 1 to 3;
- (e) n is an integer ranging from 0 to 7;
- (f) Y represents a counter ion, the type of which is dependent on the charge of the complex;
- (g) z denotes the charge of the complex and is an integer which is positive, zero, or negative;
- and
- (h) q=z/{charge Y}.
A method of stereospecifically oxidizing an organic substrate comprising combining the substrate with a peroxy compound, precursor thereof, or mixtures thereof, and with an oxidatively resistant Fe-complex catalyst, or precursor thereof, of the formula:
- {L.sub.m Fe.sub.m X.sub.n}.sup.z Y.sub.q
- wherein:
- (a) Fe is iron in the II, III, IV, or V oxidation state;
- (b) X represents a coordinating species of the formula RCN which is capable of coordinating to the Fe and being displaced by a peroxy compound or precursor thereof, wherein R is an organic group;
- (c) L represents a tetradentate nonporphyrin ligand, which is an organic molecule containing heteroatoms, capable of coordinating to the Fe through all or some of its heteroatoms;
- (d) m is an integer ranging from 1 to 3;
- (e) n is an integer ranging from 0 to 7;
- (f) Y represents a counter ion, the type of which is dependent on the charge of the complex;
- (g) z denotes the charge of the complex and is an integer which is positive, zero, or negative;
- and
- (h) q=z/{charge Y}.
A method of stereospecifically oxidizing an organic substrate comprising combining the substrate with a peroxy compound, precursor thereof, or mixtures thereof, and with an oxidatively resistant Fe-complex catalyst, or precursor thereof, of the formula:
- {L.sub.m Fe.sub.m O(H.sub.2 O).sub.2}.sup.z Y.sub.q
- wherein:
- (a) Fe is iron in the II, III, IV, or V oxidation state;
- (b) L represents a tetradentate nontetraazamacrocyclic ligand, which is an organic molecule containing heteroatoms, capable of coordinating to the Fe through all or some of its heteroatoms;
- (c) m is an integer ranging from 1 to 3;
- (d) Y represents a counter ion, the type of which is dependent on the charge of the complex;
- (e) z denotes the charge of the complex and is an integer which is positive, zero, or negative;
- and
- (f) q=z/{charge Y}.
Dependencies are inferred from the claim text.