title: Pronounced photosensitivity of molecular [Ru(bpy)2(OSO)]+ solutions based on two photoinduced linkage isomers.
abstract: Photosensitive properties of [Ru(bpy)(2)(OSO)] PF(6) dissolved in propylene carbonate originating from photoinduced linkage isomerism have been studied by temperature and exposure dependent transmission and UV/Vis absorption spectroscopy. An exceeding photochromic photosensitivity of S = (63 +/- 10) x 10(3) cm l J(-1) mol(-1) is determined. It is attributed to a maximum population of 100% molecules in the photoinduced isomers, a unique absorption cross section per molecule and a very low light exposure of Q(0) = (0.25 +/- 0.03) Ws cm(-2) for isomerism. Relaxation studies of O-bonded to S-bonded isomers at different temperatures verify the existence of two distinct structures of linkage isomers determined by the activation energies of E(A,1) = (0.76 +/- 0.08) eV and E(A,2) = (1.00 +/- 0.14) eV.
authors.affiliation: Department of Physics, University of Osnabrück, 49069 Osnabrück, Germany. vdieckma@uos.de
authors.forename: Volker
authors.initials: V
authors.lastname: Dieckmann
authors.forename: Sebastian
authors.initials: S
authors.lastname: Eicke
authors.forename: Jeffrey J
authors.initials: JJ
authors.lastname: Rack
authors.forename: Theo
authors.initials: T
authors.lastname: Woike
authors.forename: Mirco
authors.initials: M
authors.lastname: Imlau