%0 Journal Article %1 Kang_2021 %A Kang, Seongsoo %A Kim, Taeyeon %A Hong, Yongseok %A Würthner, Frank %A Kim, Dongho %D 2021 %I American Chemical Society (ACS) %J J. Am. Chem. Soc. %K myown %N 26 %P 9825--9833 %R 10.1021/jacs.1c03276 %T Charge-Delocalized State and Coherent Vibrational Dynamics in Rigid PBI H-Aggregates %U https://doi.org/10.1021%2Fjacs.1c03276 %V 143 %X Herein, the ultrafast photoinduced dynamics and vibrational coherences for two perylenebisimide (PBI) H-aggregates showcase the formation of the excimer state and the delocalized radical anion state in the excited state, respectively. Using femtosecond transient absorption (fs-TA) and time-resolved impulsive stimulated Raman scattering (TR-ISRS) measurements, we unveiled excited-state dynamics of PBI H-aggregates in two aspects: (1) the intermolecular interactions between PBI units in H-aggregates induce the formation of new excited states, excimer and delocalized radical anion states, and (2) the intermolecular out-of-plane along the aggregate axis and the PBI core C═C stretch Raman modes can be a crucial indicator to understand the coherent exciton dynamics in H-aggregates. Notably, those excited-state Raman modes showed stationary peak positions during the excited-state dynamics. TR-ISRS analysis provides insights into the excited-state vibrational coherences concerning the formation of the excimer and charge-delocalized state in each aggregate system.

@article{Kang_2021, abstract = {Herein, the ultrafast photoinduced dynamics and vibrational coherences for two perylenebisimide (PBI) H-aggregates showcase the formation of the excimer state and the delocalized radical anion state in the excited state, respectively. Using femtosecond transient absorption (fs-TA) and time-resolved impulsive stimulated Raman scattering (TR-ISRS) measurements, we unveiled excited-state dynamics of PBI H-aggregates in two aspects: (1) the intermolecular interactions between PBI units in H-aggregates induce the formation of new excited states, excimer and delocalized radical anion states, and (2) the intermolecular out-of-plane along the aggregate axis and the PBI core C═C stretch Raman modes can be a crucial indicator to understand the coherent exciton dynamics in H-aggregates. Notably, those excited-state Raman modes showed stationary peak positions during the excited-state dynamics. TR-ISRS analysis provides insights into the excited-state vibrational coherences concerning the formation of the excimer and charge-delocalized state in each aggregate system.}, added-at = {2021-07-20T08:54:25.000+0200}, author = {Kang, Seongsoo and Kim, Taeyeon and Hong, Yongseok and Würthner, Frank and Kim, Dongho}, biburl = {https://www.bibsonomy.org/bibtex/26a29baf3ff3b3787370881536b60722b/wuerthner_group}, doi = {10.1021/jacs.1c03276}, interhash = {1e195c79d6f30beae576e890c944d5b3}, intrahash = {6a29baf3ff3b3787370881536b60722b}, journal = {J. Am. Chem. Soc.}, keywords = {myown}, month = jun, number = 26, pages = {9825--9833}, publisher = {American Chemical Society ({ACS})}, timestamp = {2023-05-23T13:10:39.000+0200}, title = {Charge-Delocalized State and Coherent Vibrational Dynamics in Rigid PBI H-Aggregates}, url = {https://doi.org/10.1021%2Fjacs.1c03276}, volume = 143, year = 2021 }