Transient Absorption from the 1Bu+ State of All-trans-β-carotene Newly Identified in the Near-infrared Region¶
- 1 January 2001
- journal article
- Published by Wiley in Photochemistry and Photobiology
- Vol. 73 (3) , 219-22
- https://doi.org/10.1562/0031-8655(2001)073<0219:taftus>2.0.co;2
Abstract
We have attempted subpicosecond time-resolved absorption spectroscopy of all-trans-beta-carotene in organic solvents in the 820-1060 nm region and found novel transient absorption features which lived in subpicosecond time scales. A first component that appeared immediately after excitation showed a lifetime of 190 +/- 10 fs in n-hexane in agreement with the 1Bu+ lifetime that had been determined by fluorescence upconversion spectroscopy (195 +/- 10 fs). (Kandori et al. [1994] J. Am. Chem. Soc. 116, 2671-2672.) Therefore, this component is assigned to a transient absorption from the 1Bu+ state.Keywords
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