Electron transfer of carbonylmetalate radical pairs: femtosecond visible spectroscopy of optically excited ion pairs

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Charge transfer excitation at 640 nm of the cobaltocenium tetracarbonylcobaltate ion pair, [Cp{sub 2}Co{sup +}{vert_bar}Co(CO){sub 4}{sup -}], was monitored in 1,2- dichloroethane solution by femtosecond transient visible absorption spectroscopy. The absorption prepares a neutral radical pair that can undergo spontaneous back electron transfer, and which shows a double peaked spectrum with features at 760 and 815 nm at 3 ps delay time. Transient decay times of 5.8{+-}0.5 ps were measured by monitoring the decay of Co(CO){sub 4} at 757 nm and 780 nm, and these are assigned to the back electron transfer step. The ET kinetics are consistent with the ... continued below

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8 p.

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Wen, X.; Spears, K.G.; Wiederrecht, G.P. & Wasielewski, M.R. February 1, 1997.

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Description

Charge transfer excitation at 640 nm of the cobaltocenium tetracarbonylcobaltate ion pair, [Cp{sub 2}Co{sup +}{vert_bar}Co(CO){sub 4}{sup -}], was monitored in 1,2- dichloroethane solution by femtosecond transient visible absorption spectroscopy. The absorption prepares a neutral radical pair that can undergo spontaneous back electron transfer, and which shows a double peaked spectrum with features at 760 and 815 nm at 3 ps delay time. Transient decay times of 5.8{+-}0.5 ps were measured by monitoring the decay of Co(CO){sub 4} at 757 nm and 780 nm, and these are assigned to the back electron transfer step. The ET kinetics are consistent with the previously reported rates of electron transfer that were measured for specific vibrational states by picosecond transient IR.

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8 p.

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OSTI as DE97002720

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  • Other Information: PBD: [1997]

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  • Other: DE97002720
  • Report No.: ANL/CHM/PP--84181
  • Grant Number: W-31109-ENG-38
  • DOI: 10.2172/488804 | External Link
  • Office of Scientific & Technical Information Report Number: 488804
  • Archival Resource Key: ark:/67531/metadc677810

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  • February 1, 1997

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  • July 25, 2015, 2:21 a.m.

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  • Dec. 14, 2015, 6:29 p.m.

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Wen, X.; Spears, K.G.; Wiederrecht, G.P. & Wasielewski, M.R. Electron transfer of carbonylmetalate radical pairs: femtosecond visible spectroscopy of optically excited ion pairs, report, February 1, 1997; Illinois. (digital.library.unt.edu/ark:/67531/metadc677810/: accessed April 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.