heavy atom effect

https://doi.org/10.1351/goldbook.H02756
The enhancement of the rate of a spin-forbidden process by the presence of an atom of high @A00499@, which is either part of, or external to, the excited molecular entity. Mechanistically, it responds to a @S05870@ enhancement produced by a heavy atom.
Source:
PAC, 1996, 68, 2223. (Glossary of terms used in photochemistry (IUPAC Recommendations 1996)) on page 2245 [Terms] [Paper]
Citation: 'heavy atom effect' in IUPAC Compendium of Chemical Terminology, 3rd ed. International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. https://doi.org/10.1351/goldbook.H02756 RIS BibTex EndNote
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Last revised: February 24, 2014