Early events in radiation chemistry and in photoionization

Conference · Thu Dec 31 04:00:00 EST 1992

OSTI ID:10104875

Trifunac, A D; Loffredo, D M; Liu, A -D

Real-time studies of aliphatic and aromatic hydrocarbons by pulse radiolysis and laser photoionization reveal the chemistry of the ionic species in the condensed phase. The occurrence of radical cation reactions with solvent molecules provides the core mechanism capable of explaining a wide range of observations in photoionization and radiation chemistry. The study of products and transients in photoionization of aromatic solutes in hydrocarbon and alcohol solvent illustrates several details of this ``high-energy`` chemistry. A reaction pathway involving ion-molecule reaction of excited ions is indicated for a series of polycyclic aromatic hydrocarbons photoionized using intense excimer laser (248 and 308 nm) pulses in hydrocarbon and alcohol solutions. We have found that condensed-phase ion-molecule reactions in radiolysis are ubiquitous and we speculate on their overall role in hydrocarbon radiolysis.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 10104875
• Report Number(s): ANL/CP--76176; CONF-920909--1; ON: DE93002991
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400500
400600
CATIONS
CHEMICAL REACTION KINETICS
CONDENSED AROMATICS
HYDROCARBONS
ION-MOLECULE COLLISIONS
IONS
PHOTOCHEMISTRY
PHOTOIONIZATION
POLYCYCLIC AROMATIC HYDROCARBONS
RADIATION CHEMISTRY
RADICALS
RADIOLYSIS
REACTION INTERMEDIATES