54090-83-4Relevant academic research and scientific papers
Molar absorption coefficients of porphyrin esters in chloroform determined by copper titration
With,Pedersen
, p. 425 - 429 (1977)
Chromatographically pure porphyrin esters free from metalloporphyrins were titrated with Cu2+ to determine the molar amount of porphyrin present. The end point of the titration was defined by a t.l.c. method detecting traces of metal free porphyrin ester in admixture to its copper complex. From spectrometic measurement at the Soret maximum and the molar amounts found by the titration, ε(M) was calculated for proto-, copro-, penta-, hexa- and hepta- carboxylic and uro porphyrin permethyl esters. The values for uroporphyrin showed perfect agreement with those of previous workers, whereas those for coproporphyrin were about 5% lower and those for protoporphyrin more than 20% lower. The implications of the findings are discussed. Determinations of ε(M) of some higher esters (ethyl to pentyl) and some partial methyl esters with one carboxyl group free are also presented.
Porphyrin compounds, their conjugates and assay methods based on the use of said conjugates
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, (2008/06/13)
The preparation of phosphorescent metalloporphyrin labelling reagents and their use for preparation of phosphorescent conjugates with biomolecules. The labelling reagents obtainable are water soluble monofunctional derivatives of Pt- and Pd-coproporphyrins, where the term “monofunctional” refers to the number of reactive groups in the porphyrin moiety.
