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Photo‐Induced Electron Transfer Between Photosystem 2 via Cross‐linked Redox Hydrogels
Author(s) -
Badura Adrian,
Guschin Dmitrii,
Esper Berndt,
Kothe Tim,
Neugebauer Sebastian,
Schuhmann Wolfgang,
Rögner Matthias
Publication year - 2008
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200804191
Subject(s) - redox , electron transfer , photochemistry , photosystem ii , osmium , chemistry , electrode , light intensity , electron acceptor , photosystem i , catalysis , polymer , self healing hydrogels , acceptor , electron transport chain , materials science , photosynthesis , inorganic chemistry , polymer chemistry , optics , ruthenium , organic chemistry , biochemistry , physics , condensed matter physics
Photosystem 2 (PS2) that catalyses light driven water splitting in photosynthesis was ‘wired’ to electrode surfaces via osmium‐containing redox polymers based on poly(vinyl)imidazol. The redox polymer hydrogel worked as both immobilization matrix and electron acceptor for the enzyme. Upon illumination, the enzymatic reaction could be switched on and a catalytic current was observed at the electrode. The catalytic current is directly dependent on the intensity of light used for the excitation of PS2. A typical current density of 45 μA cm −2 at a light intensity of 2.65 mW cm −2 could be demonstrated with a significantly improved operational stability.