title: [Comparative study of the photopotential and EPR signal arising after photooxidation of metal substituted pheophytins].
abstract: Ethanolic solutions of Zn-, Cd-Phe a and b and Chl a and b with p-benzoquinone as electron acceptor have been studied at pH 4. In all systems positive photopotentials and singlet ESR lines of the pigment cation radicals are observed. A conclusion is made that the photopotential is only partly attributable to an electrode reaction of the cation radicals, to a greater extent arising due to unknown, non-radical particles.
mesh_terms: D002734:Chlorophyll; D004563:Electrochemistry; D004578:Electron Spin Resonance Spectroscopy; D010777:Photochemistry; D011809:Quinones
chemical_list: D011809:Quinones; D002734:Chlorophyll
vernacular_title: Sravnitel'noe izuchenie fotopotentsiala i signala EPR, voznikaiushchikh pri fotookislenii metallzameshchennykh feotitinov.