Trapping X-ray Radiation Damage from Homolytic Se-C Bond Cleavage in BnSeSeBn Crystals (Bn=benzyl, CH₂ C₆ H₅ ).

ABSTRACT: Irradiation of dibenzyl diselenide BnSeSeBn with X-ray or UV-light cleaves the Se-C and the Se-Se bonds, inducing stable and metastable radical states. They are inevitably important to all natural and life sciences. Structural changes due to X-ray-induced Se-C bond-cleavage could be pin-pointed in various high-resolution X-ray diffraction experiments for the first time. Extended DFT methods were applied to characterize the solid-state structure and support the refinement of the observed residuals as contributions from the BnSeSe⋅ radical species. The X-ray or UV-irradiated crystalline samples of BnSeSeBn were characterized by solid-state EPR. This paper provides insight that in the course of X-ray structure analysis of selenium compounds not only organo-selenide radicals like RSe⋅ may occu

SUBMITTER: Schurmann CJ 

PROVIDER: S-EPMC9320817 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature