64108-92-5Relevant academic research and scientific papers
DOES INTERSYSTEM CROSSING IN TRIPLET BIRADICALS GENERATE SINGLETS WITH CONFORMATIONAL MEMORY?
Scaiano, J. C.
, p. 819 - 824 (1982)
The effect of temperature, concentration, external magnetic fields and paramagnetic quenchers on the lifetime of biradicals produced in the Norrish Type II reaction has been examined.Analysis of this data and that available from earlier reports leads to the conclusion that in addition to controlling the biradical lifetimes, intersystem crossing in triplet-derived biradicals plays a critical role in determining the behaviour and products which result from singlet biradical reactions.The effect is attributed to conformational memory in the singlet biradical which reflects its short lifetime.
UV-Laser Photochemistry: Trapping of the Norrish Type II Triplet Diradical 1-Hydroxy-4-methyl-1-phenyl-1,4-pentanediyl with Molecular Oxygen
Adam, Waldemar,Grabowski, Sven,Wilson, R. Marshall
, p. 561 - 564 (2007/10/02)
The triplet lifetime (3τ = 131+/-5 ns) of diradical 2, produced in the laser photolysis (334 nm) of 4-methyl-1-phenyl-1-pentanone (1) in methanol, was determined by dioxygen trapping.This lifetime agrees well with the value determined by laser flash photolysis (3τ = 97 ns), thereby establishing the reliability of the trapping technique.The trapping product was prepared by independent synthesis and characterized as 3-hydroxy-1,2-dioxolane 9, the ring tautomer of hydroperoxide 6. - Keywords: Norrish type II triplet diradical/ UV-Laser photochemistry
