Theoretical study on an intriguing excited-state proton transfer process induced by weakened intramolecular hydrogen bonds
Changjiao Shang, Yunjian Cao, Chaofan Sun, Huifang Zhao
Abstract
state, and the corresponding energy barrier is gradually enlarged with increasing solvent polarity. To further expound the weakened IHB-induced ESIPT mechanism, the scanned PESs connecting the transition state (TS) structures and the initial forms indicate that the ESIPT process is infeasible without the appropriate structural torsion. Our work not only unveils the extraordinary ESIPT process of L, but also complements the results obtained from previous experiments.
Topics & Concepts
Intramolecular forceChemistryPhotoexcitationHydrogen bondExcited stateGround stateProtonPotential energyChemical physicsPhotochemistryComputational chemistryAtomic physicsMoleculeStereochemistryPhysicsQuantum mechanicsOrganic chemistryPhotochemistry and Electron Transfer StudiesFree Radicals and AntioxidantsSpectroscopy and Quantum Chemical Studies