Symmetry-breaking charge separation in a nitrogen-bridged naphthalene monoimide dimer
Xinmiao Niu, Keita Tajima, Jie Kong, Min Tao, Norihito Fukui, Zhuoran Kuang, Hiroshi Shinokubo, Andong Xia
Abstract
is the dominant radical anion unit after CS, evidenced by the femtosecond transient absorption measurements and spectroelectrochemistry in polar solvents. Femtosecond transient absorption spectra and quantum chemical calculations reveal the conformational change after the formation of the symmetry-breaking charge separation (SBCS) state upon photoexcitation, while a near-orthogonal structure in the excited state of bis-ANI retards charge recombination. In addition, it is evidenced that the rate of SBCS can be tuned by changing the different polar solvents.
Topics & Concepts
ChemistryPhotochemistryPhotoexcitationUltrafast laser spectroscopyExcited stateDimerAbsorption spectroscopyRadical ionSpectroscopyIonOrganic chemistryAtomic physicsPhysicsQuantum mechanicsPhotochemistry and Electron Transfer StudiesOrganic Electronics and PhotovoltaicsPorphyrin and Phthalocyanine Chemistry