US4230828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer bound multidentate complexes
Assignee: University of Illinois Foundation
•
Filing: 1978-12-11
•
Granted: 1980-10-28
•
Expires: 1998-12-11
Abstract
Abstract Polymer bound multidentate complexes are prepared by reacting pendant benzyl chloride and benzyl iodide groups on a variety of polymer supports, including crosslinked polystyrene, with 3,3'-iminodiproprionitrile and reducing the nitrile groups by treatment with, for example, a boron hydride-tetrahydrofuran complex to form the amine. The amine is a precursor for other ligand systems; for example, the primary amine groups formed condense with an aldehyde or ketone to yield five coordinate Schiff base ligands. The polydentate amine ligand systems are useful for synthesis of chelating agents for sequestering metal ions from solution for purification or concentration purposes. Metal complexes of these ligands with manganese, iron, cobalt, nickel, copper, and zinc can be prepared which are useful as heterogeneous oxidation catalysts.
Inventors
- 👤 John H. Gaul, Jr.
- 👤 Russell S. Drago
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:36
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/30; C08F8/32; C08F2810/00; C08F2810/20
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
53 words
A polymer bound multidentate ligand system comprising an insoluble crosslinked polymer support and at least one pendant Schiff base ligand attached thereto, the ligand being represented by the formula ##STR6## where X is nitrogen or phosphorus, and R is derived from a carbonyl compound selected from the group consisting of aldehydes and ketones.
Claim 2
Dependent Claim
53 words
A polymer bound multidentate ligand system comprising an insoluble crosslinked polymer support and at least one pendant Schiff base ligand attached thereto, the ligand being represented by the formula ##STR6## where X is nitrogen or phosphorus, and R is derived from a carbonyl compound selected from the group consisting of aldehydes and ketones.
Claim 3
Dependent Claim
19 words
The polymer bound mutidentate system of claim 1 wherein X is nitrogen and the insoluble polymer is crosslinked polystyrene.
Claim 4
Dependent Claim
22 words
The polymer bound multidentate system of claim 1 wherein the aldehyde is selected from the group consisting of salicylaldehyde and 2-pyridine aldehyde.
Claim 5
Dependent Claim
21 words
The polymer bound multidentate system of claim 1 wherein the ketone is selected from the group consisting of acetylacetone and 2,3-butanedione.
Claim 6
Dependent Claim
76 words
A polymer bound multidentate metal complex comprising an insoluble crosslinked polymer support and, attached thereto, at least one pendant Schiff base ligand containing the metal complex, the complexed ligand being represented by the formula ##STR7## where X is nitrogen or phosphorus, R is derived from a carbonyl compound selected from the group consisting of aldehydes and ketones, and M is a metal selected from the group consisting of Co(II), Mn(II), Ni(II), Cu(II), Zn(II), Fe(II), and Fe(III).
Claim 7
Dependent Claim
76 words
A polymer bound multidentate metal complex comprising an insoluble crosslinked polymer support and, attached thereto, at least one pendant Schiff base ligand containing the metal complex, the complexed ligand being represented by the formula ##STR7## where X is nitrogen or phosphorus, R is derived from a carbonyl compound selected from the group consisting of aldehydes and ketones, and M is a metal selected from the group consisting of Co(II), Mn(II), Ni(II), Cu(II), Zn(II), Fe(II), and Fe(III).
Claim 8
Dependent Claim
17 words
The metal complex of claim 5 wherein X is nitrogen and the insoluble polymer is crosslinked polystyrene.
Claim 9
Dependent Claim
20 words
The metal complex of claim 5 wherein the aldehyde is selected from the group consisting of salicylaldehyde and 2-pyridine aldehye.
Claim 10
Dependent Claim
19 words
The metal complex of claim 5 wherein the ketone is selected from the group consisting of acetylacetone and 2,3-butanedione.
Claim 11
Dependent Claim
16 words
The metal complex of claim 6 wherein the aldehyde is salicylaldehyde and the metal is cobalt.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-10-28 | 1984-04-28 | 1984-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-28 | 1988-04-28 | 1988-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-28 | 1992-04-28 | 1992-10-28 | $7700.00 | Window Closed / Lapsed |