Diazoluminomelanin and a method for preparing same
US Patent 5003050
Patent record · US 5003050
Expired
- Inventors
- Johnathan L. Kiel, Gerald J. O'Brien
- Assignee
- United States Department of the Air Force
- Filed
- Mar 7, 1990
- Granted
- Mar 26, 1991
- Expired
- Mar 7, 2010
Bibliographic data via Google Patents (public). Term estimated at 20 years from filing — verify against USPTO for legal use.
Claims
- We claim: 1. A luminescent compound having repeating units of the formula: ##STR3## 2. A method for preparing a luminescent compound having repeating units of the formula: ##STR4## which comprises the steps of (a) reacting 3-amino-L-tyrosine with an alkali metal nitrite to form a diazonium salt, (b) reacting said salt with 5-amino-2,3-dihydro-1,4-phthalazinedione and (c) recovering the resulting compound. 3. The method of claim 2 wherein said reacting step (a) is carried out in aqueous solution. 4. The method of claim 3 wherein said aqueous solution is acidic. 5. The method of claim 4 wherein said aqueous solution has a pH of about 5.0 to 6.0. 6. The method of claim 2 wherein said reacting step (a) is carried out for about 1 to 20 minutes. 7. The method of claim 6 wherein said reacting step (a) is carried out for about 5 to 10 minutes. 8. The method of claim 2 wherein said reacting step (a) is carried out at a temperature of about 0.degree. C. to room temperature. 9. The method of claim 2 wherein the amounts of said 3-amino-L-tyrosine and said alkali metal nitrite are approximately equimolar. 10. The method of claim 2 wherein said reacting step (b) is carried out for about 20 to 200 minutes. 11. The method of claim 2 wherein the molar ratio of 3-amino-L-tyrosine to 5-amino-2,3-dihydro-1,4-phthalazinedione is in the approximate range of 0.6:1 to 3:1. 12. The method of claim 11 wherein the amounts of said 3-amino-L-tyrosine and said 5-amino-2,3-dihydro-1,4-phthalazinedione are approximately equimolar.
Provenance
- Original
- https://dodtechmatch.com/dod/patent/patentview.aspx?id=5003050
Carried forward from the DoD TechMatch catalog and shown here as it stood when the record was captured, so it may be outdated — see the live collections for current solicitations, filings, and events, and the platform history for how it got here. Not affiliated with the U.S. Department of Defense. Contact details from the original listing have been withheld.