✦ LIBER ✦
Mass spectra of porphyrin alkyl esters and their copper complexes. Studies on products from humans and animals with porphyria
✍ Scribed by Jørgen Møller; Torben K. With
- Publisher
- John Wiley and Sons
- Year
- 1974
- Tongue
- English
- Weight
- 306 KB
- Volume
- 9
- Category
- Article
- ISSN
- 1076-5174
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✦ Synopsis
Abstract
Mass spectra of methyl and higher aliphatic esters of biologically important porphyrins—prepared from human and bovine excreta—were recorded. Variation in the number of esterified carboxyl groups (4 to 8) or in the size of the ester groups causes no change in the fragmentation modes; only the abundances of the fragment ions vary. The conversion of a porphyrin ester to its copper‐complex (chelate) has been achieved in a simple way. The mass spectra of the copper chelates are compared with those of the free porphyrin esters and minor differences are observed.