Triplet conformation in chromophore-fused cyclooctatetraene dyes
Sunandita Paul, Hidetsugu Kitakado, K. SUGA, Ryota Kotani, Nilanjan Dey, Ravindra Venkatramani, Eduard Matito, Shohei Saito, Jyotishman Dasgupta
Abstract
Cyclooctatetraene (COT) is predicted to have a planar aromatic triplet state. Using femtosecond-to-microsecond transient absorption spectroscopy, we show that acene chromophore-fused COT dyes also have a planar COT ring in their triplet states, although they are not aromatic.
Topics & Concepts
ChromophoreCyclooctatetraenePhotochemistryAceneMicrosecondFemtosecondMaterials scienceUltrafast laser spectroscopyPlanarTriplet stateRing (chemistry)SpectroscopyChemistryMoleculeOpticsOrganic chemistryLaserComputer graphics (images)PhysicsComputer scienceQuantum mechanicsSynthesis and Properties of Aromatic CompoundsLuminescence and Fluorescent MaterialsPhotochemistry and Electron Transfer Studies