Journal
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
Volume -, Issue 25, Pages 3895-3904Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejic.200900548
Keywords
Photochromism; Ruthenium; Sulfoxide complexes; Photochemistry; Isomerization
Categories
Funding
- National Defense Science and Engineering Graduate (NDSEG)
- Ohio University
- Condensed Matter and Surface Science
- NanoBioTechnology Initiative
- National Science Foundation (NSF) [CHE-0809669, CHE-0947031]
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The spectroscopic properties of photochromic ruthenium sulfoxide complexes are reviewed. The mode of action is associated with an excited state S -> O isomerization triggered by light. These complexes feature large, positive Ru3+/2+ reduction potentials indicative of stabilization of the Ru d pi orbital set. In addition, these compounds feature large quantum yields of isomerization. In aggregate, the data argue against a promoting role for the LF states and suggest that isomerization occurs from the CT potential energy surface. Picosecond transient absorption experiments indicate a change in the isomerization mechanism between mondentate sulfoxide complexes and chelating sulfoxide complexes. These results as well as potential energy diagrams for certain complexes are discussed.
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