Molecular photochemistry. XL. Determination of the reactivity of first excited singlet states of organic compounds toward unimolecular primary photochemical processes from molecular fluorescence characteristics. Application to intramolecular .gamma.-hydrogen abstraction reactions of alkyl ketones

1971 ◽  
Vol 93 (15) ◽  
pp. 3569-3570 ◽  
Author(s):  
J. C. Dalton ◽  
N. J. Turro
Keyword(s):  
Organic Compounds ◽  
Hydrogen Abstraction ◽  
Excited Singlet ◽  
Photochemical Processes ◽  
Singlet States ◽  
Fluorescence Characteristics ◽  
Molecular Fluorescence ◽  
Excited Singlet States

Quasiparticle Excitations in Polyenes and Polyacetylene

1987 ◽  
Vol 109 ◽  
Author(s):  
Paul Tavan ◽  
Klaus Schulten
Keyword(s):  
Dispersion Relations ◽  
Excited Singlet ◽  
Quasi Particle ◽  
Double Excitation ◽  
Singlet States ◽  
Excited Singlet States ◽  
Electron Excitations ◽  
Quasiparticle Excitations

ABSTRACTWe apply the Pariser-Parr-Pople Hamiltonian to study many-electron excitations in polyenes and polyacetylene. The excited singlet states of polyenes, calculated by a multireference double excitation expansion, are classified as quasi-particle excitations, namely as triplet-triplet magnons and particle-hole excitons. From finite polyene spectra we derive approximate dispersion relations for these quasi-particles in the infinite polyene, i.e. polyacetylene.

Sign in / Sign up

Export Citation Format

Share Document