Abstract
The carbonyl chromophore plays a central role in organic photochemistry and photophysics in particular due to the interplay between two types of excited states resulting from the promotion of an electron to the anti-bonding \(\pi ^*\) orbital from either the \(\pi \) or an \(n\) orbital [1]. Prominent examples of processes involving these states is the Norrish Type I \(\alpha \)-cleavage [2–5], the Norrish Type II intramolecular \(\gamma \)-hydrogen abstraction, and efficient intersystem crossing with a simultaneous change in the orbital angular momentum as established by El-Sayed’s selection rule.
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Notes
- 1.
For \(\Delta t\le 15\,\mathrm{{ps}}\). For \(\Delta t>15\,\mathrm{{ps}}\), the spacing is 5 ps.
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Kuhlman, T.S. (2013). The Cycloketones. In: The Non-Ergodic Nature of Internal Conversion. Springer Theses. Springer, Heidelberg. https://doi.org/10.1007/978-3-319-00386-3_7
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