Ion-induced sensitized phosphorescence excitation spectra of halobenzenes in supersonic jets

Intersystem Crossing in the 1nπ* and 1ππ* States

“…On the basis of our experimental observation of small-scale Zeeman splitting, we conclude that the main nonradiative transition is not ISC to the triplet state, but rather IC to the S 0 state. To prove this, it will be necessary to utilize techniques that allow us to directly detect triplet molecules, such as sensitized phosphorescence 56,57 and surface electron ejection by laser excited molecule (SEELEM). 58,59 ISC is generally suppressed by deuteration in aromatic hydrocarbons but is possibly enhanced by substitution with Cl, O, and S atoms.…”

REMPI-TOF mass spectra of o-, m-, and p-chlorofluorobenzene and their clusters: enhancement of the chlorine elimination reaction by cluster formation

“…4 Briefly, the samples seeded in 2-4 atm of He were heated to 20-70 "C. The supersonic jet was generated by expanding the sample vapor into a vacuum chamber at 2 X 10-6 Torr through a pulsed nozzle (General Valve series 9,0.2-mm orifice diameter). A frequencydoubled dye laser pumped by an excimer laser was used as the exciting light.…”

“…The supersonic molecular jet apparatus used in this study is the same as that described in a previous paper. 4 Briefly, the samples seeded in 2-4 atm of He were heated to 20-70 °C. The supersonic jet was generated by expanding the sample vapor into a vacuum chamber at 2 X -6 Torr through a pulsed nozzle (General Valve series 9,0.2-mm orifice diameter).…”