Fluorescence decays of thioindigo (TI) and selenoindigo (SI) in benzoic acid crystals are reported. The structures interconvert concomitantly with proton tunnelling in the host. Two benzoic acid dimers appear to be coupled to the guest transition. The double proton tunnelling rate constant is (1.67± 0.07) × 108s−1 for both the SI and TI guest.
No takes yet. Share an insight, caveat, or question.
Holtom et al. (1986) studied this question.