Knowledge Bank

Different isomers of vinoxy radical were produced in a pulsed supersonic expansion by excimer laser photolysis at 193nm. The $B~$ to $X~$ electronic transitions were probed by laser induced fluorescence. The spectra are complicated. We find as many as 30 bands over a $2700cm-1$ interval. We have measured fluorescence lifetimes of many of these bands. The lifetimes decrease slowly toward higher energies to as 25 ns and then the bands abruptly end, Comparisons with {ab initio} work will be discussed.