Ultrafast spectroscopy and structural characterization of a photochromic isomerizing ruthenium bis-sulfoxide complex

作者: Albert W. King , Jason P. Malizia , James T. Engle , Christopher J. Ziegler , Jeffrey J. Rack

DOI: 10.1039/C4DT01402B

关键词:

摘要: Irradiation of [Ru(bpy)2(bpSOp)](PF6)2 (where bpy is 2,2′-bipyridine and bpSOp 1,3-bis(phenylsulfinyl)propane) results in the formation two new isomers, namely S,O- O,O-bonded species. The crystal structure bis-thioether bis-sulfoxide complexes are reported. NMR spectroscopy complex solution consistent with molecular determined by diffraction methods. Further, reveals conformers solution, one that solid state a second conformer showing distortion aliphatic portion chelate ring. Time-resolved visible absorption isomerization time constants 91 ps dichloroethane (DCE) 229 propylene carbonate (PC). Aggregate quantum yields 0.57 0.42 have been DCE PC, respectively. kinetics thermal reversion from O,O- to S,O-bonded isomer strongly solvent dependent, occurring rates 2.41 × 10−3 4.39 10−5 s−1 DCE, 4.68 10−4 9.79 10−6 PC. kinetic components assigned isomers identified solution.

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