CHED 1196 |
| The photophysical properties of a variety of molybdenum halide clusters [Mo6X8Y6]2- (X= Cl, Br, I; Y= Cl-, Br-, I-, CH3SO3-, CF3CO2-, CF3SO3-) have been investigated. Excitation of the clusters at 350nm produces surprisingly rich phosphorescent behavior with emission energy maxima between 675 cm-1 and 825 cm-1, emission quantum yields from 5 to 80%, and emission lifetimes between 70 and 320 microseconds. The photophysical properties are insensitive to the inner halide ligands (X) with the exception of the trifluoroacetate-substituted clusters. The photochemical properties have been analyzed using the Energy Gap Law and the trifluoromethanesulfonate-substituted clusters appear to represent a new, highly emissive state for the Mo6X84+ family. |
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Undergraduate Research Poster Session: Inorganic Chemistry
2:00 PM-4:00 PM, Monday, April 7, 2008 Morial Convention Center -- Hall A, Poster
Division of Chemical Education |