title: 4-Keto-bacteriorhodopsin films as a promising photochromic and electrochromic biological material.
abstract: Photochromic and electrochromic spectral properties of 4-keto-bacteriorhodopsin (4-keto-BR) embedded in a polymer matrix were studied. The light-induced spectral changes were found to be similar to those for 4-keto-BR in suspension, but the duration of the photocycle is substantially longer (up to ten of h). Application of a constant electric field induces a bathochromic shift of the main absorption band, the amplitude of the field-induced spectral changes, showing a quadratic dependence on the field strength. Polymer films containing bacteriorhodopsin analogs show promise as new spectrally-selective photochromic and electrochromic materials.
mesh_terms: D001436:Bacteriorhodopsins / Q000031:analogs & derivatives* / Q000737:chemistry / Q000528:radiation effects; D001672:Biocompatible Materials / Q000737:chemistry* / Q000528:radiation effects*; D004563:Electrochemistry; D004582:Electronics, Medical; D008027:Light; D008422:Materials Testing; D055095:Optics and Photonics; D010777:Photochemistry; D011108:Polymers; D013053:Spectrophotometry
chemical_list: C096990:4-ketobacteriorhodopsin; D001672:Biocompatible Materials; D011108:Polymers; D001436:Bacteriorhodopsins