Sigma*-mediated electronic relaxation in 200 nm photoexcited ammonia and heteroaromatics

摘要

Time-resolved photoelectron spectra of ammonia display combination bands of the umbrella and stretching modes associated with the N-H coordinate of σ* relaxation. Time-resolved photodissociation studies determine timescales <200fs. Similar σ* photochemistry is found in heteroaromatics.