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Author(s):
Ernst, D.; Rupp, L.; Frank, R.; Kuhnle, W.; Lemmen, P.; Lenoir, D.; Schroeder, J.; Grimm, Ch; Steinel, T. 
Title:
Fluorescence excitation spectrum, lifetimes and photoisomerization of jet-cooled conformers of 1,1'-bi(benzocyclobutylidene) 
Abstract:
First measurements of fluorescence excitation spectra of the recently synthesized rigid stilbene analog 1,1'-bi(benzocyclobutylidene) in a supersonic jet expansion show that, in contrast to the parent compd., both the trans- and the cis-conformer fluoresce under these conditions. The excitation energy dependence of fluorescence lifetimes indicates the onset of an efficient non-radiative decay channel above energy thresholds of 1340 cm-1 and 990 cm-1 for the trans- and cis-form, resp., which is a...    »
 
Keywords:
Laser induced fluorescence (excitation fluorescence excitation spectrum, lifetimes and photoisomerization of jet-cooled 1,1'-bi(benzocyclobutylidene) conformers) Conformation Conformers Electronic transition Normal modes Physical process kinetics Potential barrier Vibrational frequency (fluorescence excitation spectrum, lifetimes and photoisomerization of jet-cooled 1,1'-bi(benzocyclobutylidene) conformers) Diastereomers (geometric fluorescence excitation spectrum, lifetimes and photoisomerizati...    »
 
Congress title:
CAN 137:185189 22-9 Physical Organic Chemistry Institut fur Physikalische Chemie der Universitat, Gottingen, Germany. Journal 0044-3336 72610-87-8P (trans-Benzocyclobutylidenebenzocyclobutane); 72610-88-9P (cis-Benzocyclobutylidenebenzocyclobutane) Role: CPS (Chemical process), PEP (Physical, engineering or chemical process), PRP (Properties), PUR (Purification or recovery), PYP (Physical process), PREP (Preparation), PROC (Process) (fluorescence excitation spectrum, lifetimes and photoisomeriz...    »
 
Journal title:
Z. Phys. Chem. (Muenchen, Ger.) 
Year:
2002 
Journal volume:
216 
Journal issue:
Pages contribution:
555-574