0000000000522773

AUTHOR

Martin Quick

showing 2 related works from this author

Time-resolved photoisomerization of 1,1′-di-tert-butylstilbene and 1,1′-dicyanostilbene

2016

Abstract Photoisomerization of 1,1′-di-tert-butylstilbene ( 3 ) and 1,1′-dicyanostilbene ( 4 ) is monitored with stationary and broadband transient absorption spectroscopy. The electron affinity of the substituents correlates with the shift of the absorption band. The weak extinction of 3 complicates data interpretation, but comparison with earlier measured 1,1′-dimethylstilbene ( 1 ) and 1,1′-diethylstilbene ( 2 ) helps to assign transient spectra and relaxation paths. For 3 a long-lived perpendicular state P is observed with lifetime τ P  = 134 ps in acetonitrile. For 4 τ P  = 2.1 ps in acetonitrile and 27 ps in n-hexane, the difference indicating a substantial dipole moment (∼3D) of the …

010304 chemical physicsPhotoisomerizationChemistryRelaxation (NMR)Analytical chemistryGeneral Physics and Astronomy010402 general chemistry01 natural sciences0104 chemical sciencesDipolechemistry.chemical_compoundAbsorption bandElectron affinity0103 physical sciencesUltrafast laser spectroscopyPhysical and Theoretical ChemistrySpectroscopyAcetonitrileChemical Physics Letters
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Time-Resolved Photochemistry of Stiffened Stilbenes

2019

Broadband transient absorption spectroscopy is used to study the photoisomerization of stiffened stilbenes in solution, specifically E/ Z mixtures of bis(benzocyclobutylidene) (t4, c4) and ( E)-1-(2,2-dimethyltetralinylidene)-2-2-dimethyltetraline (t6). Upon excitation to S

Materials science010304 chemical physicsPhotoisomerization0103 physical sciencesUltrafast laser spectroscopyMaterials ChemistryPhysical and Theoretical Chemistry010402 general chemistryPhotochemistrySpectroscopy01 natural sciences0104 chemical sciencesSurfaces Coatings and FilmsThe Journal of Physical Chemistry B
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