Inverse deuterium isotope effect on radiationless electronic transitions

Aviv Amirav*, Mark Sonnenschein, Joshua Jortner

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Fluorescence quantum yields, Y, front photoselected vibrational states in the S1 manifold of anthracene and of perdeuterated anthracene in planar supersonic jets reveal a large inverse deuterium isotope effect on the non-radiative relaxation from the S1 origin (YH/YD = 5), while for high (≥1500 cm-1) excess energies above the S1 origin the inverse isotope effect is eroded (YH/YD ≈ 1). Novel information emerges on intermediating states involved in intersystem crossing.

Original languageEnglish
Pages (from-to)488-493
Number of pages6
JournalChemical Physics Letters
Issue number6
StatePublished - 30 Sep 1983


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