Abstract
The magnetic field effect on the intramolecular hydrogen abstraction of α-(xanthone-2-carbonyloxy)-ω-(xanthene-2-carbonyloxy) alkanes (XO- n-XH, n = 2–12 ), in bichromophoric compounds, was studied using laser flash photolysis. Excited triplet XO abstracts a hydrogen atom from the XH moiety, generating a biradical of xanthenyl and xanthone ketyl radicals. The magnitude of the magnetic field effect on the lifetime of the xanthenyl radical increases with increasing chain length n and reaches a constant value at n ≈ 6.
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