US3846333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rare earth complexes as nuclear magnetic resonance shift reagents
Assignee: Individual
•
Filing: 1972-07-18
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Granted: 1974-11-05
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Expires: 1992-07-18
Abstract
Abstract A lanthanide chelate of a fluorinated ligand is used as a nuclear magnetic resonance shift reagent for spectral simplification and clarification. Since the use of the shift reagents of this invention facilitates compound identification and increases the scope of the applicability of nuclear magnetic resonance spectroscopy, the present invention is particularly useful in detecting and analyzing compounds which are or may be pollutants.
Inventors
- 👤 R Sievers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:34
CPC Classifications
C; C07; C07C; C07C49/00; C07C49/92; G; G01; G01N; G01N24/00; G01N24/08; G01R; G01R33/00; G01R33/20; G01R33/28; G01R33/281; Y; Y10; Y10T; Y10T436/00; Y10T436/24
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
23 words
AN ADDUCT OF AN ORGANIC COMPOUND HAVING A DONOR GROUP AND A LANTHALANIDE CHELATE OF A FLUORINATED LIGAND HAVING THE FOLLOWING STRUCTURAL FORMULA:
Claim 2
Dependent Claim
23 words
AN ADDUCT OF AN ORGANIC COMPOUND HAVING A DONOR GROUP AND A LANTHALANIDE CHELATE OF A FLUORINATED LIGAND HAVING THE FOLLOWING STRUCTURAL FORMULA:
Claim 3
Dependent Claim
38 words
A composition consisting essentially of a solution of a paramagnetic trivalent rare earth chelate of a fluorinated ligand in a solvent therefor and a reference material having a single reference line, said chelate having the following structural formula:
Claim 4
Dependent Claim
38 words
A composition consisting essentially of a solution of a paramagnetic trivalent rare earth chelate of a fluorinated ligand in a solvent therefor and a reference material having a single reference line, said chelate having the following structural formula:
Claim 5
Dependent Claim
114 words
A composition consisting essentially of a solution of a paramagnetic trivalent rare earth chelate of a fluorinated ligand in a solvent therefor and a reference material having a single reference line, said fluorinated ligand being selected from the group consisting of 1,1,1,2,2,3,3-heptafluoro-7,7-dimethyl-4,6-octanedione; 1,1,1,2,2,3,3,7,7,7-decafluoro-4,6-heptanedione, and trifluoroacetyl-d-camphor, the solution containing (1) about 0.01 to 0.5 mol of the chelate per 1,000 milliliters of the solvent which is selected from the group consisting of carbon tetrachloride, chloroform, deuterated methylene chloride, benzene, deuterated benzene and cyclohexane and (2) about 0.1 to 1 weight percent, based on the weight of the solution, of the reference material which is selected from the group consisting of tetramethylsilane, chloroform, cyclohexane and benzene.
Claim 6
Dependent Claim
114 words
A composition consisting essentially of a solution of a paramagnetic trivalent rare earth chelate of a fluorinated ligand in a solvent therefor and a reference material having a single reference line, said fluorinated ligand being selected from the group consisting of 1,1,1,2,2,3,3-heptafluoro-7,7-dimethyl-4,6-octanedione; 1,1,1,2,2,3,3,7,7,7-decafluoro-4,6-heptanedione, and trifluoroacetyl-d-camphor, the solution containing (1) about 0.01 to 0.5 mol of the chelate per 1,000 milliliters of the solvent which is selected from the group consisting of carbon tetrachloride, chloroform, deuterated methylene chloride, benzene, deuterated benzene and cyclohexane and (2) about 0.1 to 1 weight percent, based on the weight of the solution, of the reference material which is selected from the group consisting of tetramethylsilane, chloroform, cyclohexane and benzene.
References Cited (Backward Citations)
US3558440A
Cited
US3789060A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |