Synthesis, Structural Characterization and Physicochemical Properties of Polymers Formed by Diazotization of 3-Amino-L-tyrosine and Closely Related Compounds
Abstract
The structural characteristics of a diazotization polymer known as DALM (diazoluminomelanin) have been investigated by several methods including chromatographic and electrophoretic separations, nmr spectroscopy, mass spectroscopy and similar approaches. DALM is prepared by the action of sodium nitrite on aqueous solutions containing 3-amino-L-tyrosine (3-AT) and luminol, and a simpler but closely related polymer (poly-3-AT) is prepared by the action of nitrite ion on 3-AT alone. Both substances are complex since they consist of more than one type of polymeric product, and the polymer formation reaction involves not only the aromatic ring of 3-AT but also a partial sidechain scission. Existing evidence suggests that a polyphenylene linkage is the dominant catenation mode in both DALM and poly-3-AT. Diazotized luminol (i.e., luminol diazonium) has been shown to be an excellent sonochemiluminescent agent, and DALM'S luminescent properties, which include a thermochemiluminescent response to dissolved carbon dioxide, probably derive from diazotized luminol and its products.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 06, 1998
- Accession Number
- ADA349655
Entities
People
- John R. Wright