Insights Into the Mechanism of Energy Transfer with Poly (Heptazine Imide)s in a Deoximation Reaction

Following our previous studies on potassium poly(heptazine imide) (K-PHI), that is, catalyzed photooxidative [3+2] aldoxime-to-nitrile addition to form 1,2,4-oxadiazoles, we discovered that electron-rich oximes yield the parent aldehydes instead of target products. In this work, the mechanism of this singlet oxygen-mediated deoximation process was established using a series of control reactions and spectroscopic measurements such as steady-state and time-resolved fluorescence quenching experiments. Additionally, the singlet-triplet energy gap value was obtained for K-PHI in suspension, and the reaction scope was broadened to include ketoximes.

Automated summary

In this study, the mechanism of singlet oxygen-mediated deoximation process was established through a series of control reactions and spectroscopic measurements, expanding the reaction scope to include ketoximes.