Ultrafast excited-state dynamics of 4-hydroxychalcone: role of intramolecular charge transfer and photoacidity
Preetika Verma, Reshma Mathew, Nishant Dhiman, Prajoy Kumar Mitra, Yapamanu Adithya Lakshmanna
Abstract
-butylamine (TBA) exhibit dual band emission. The fs-TA measurements of 4-HC in the presence of MI/TBA exhibit distinct spectral and associated lifetimes as compared to 4-HC alone indicating a significant interaction of the hydroxyl proton with bases and influencing the reaction dynamics. The 4-HC:MI/TBA adduct undergoes excited-state intermolecular proton transfer within a time scale of ∼500 fs and subsequently relaxes back to the ground state through a long-lived triplet state. The experimental observations of excited-state reaction dynamics of 4-HC in the presence of MI/TBA bases have been well corroborated with the computational analysis.
Topics & Concepts
Intramolecular forceExcited stateUltrashort pulseChemistryPhotochemistryCharge (physics)DissipationAbsorption (acoustics)Radiative transferChemical physicsComputational chemistryMaterials scienceStereochemistryAtomic physicsPhysicsThermodynamicsLaserQuantum mechanicsOpticsComposite materialPhotochemistry and Electron Transfer StudiesRadical Photochemical ReactionsPhotochromic and Fluorescence Chemistry