title: Solution-state photophysics of N-carbazolyl benzoate esters: dual emission and order of states in twisted push-pull chromophores.
abstract: The stepwise photoinduced charge transfer in a series of N-carbazolyl benzoate ester push-pull chromophores has been studied in solution. Dual emission from the locally excited (LE, the lowest-energy singlet excited state of1Lbnature localized on the carbazole donor) and the highly polarized, intramolecular charge-transfer states of (pre)-twisted type (TICT states) is observed in non-polar and polar solvents. Ultrafast transient spectroscopy reveals that the excitation into the1LbLE state is followed by rapid (∼ps) charge separation into an emissive TICT state. Excitation into the second singlet excited state localized on the carbazole (S2) with1Lanature results in sub-100 fs population of both1Lband TICT states.
authors.affiliation: Center for Photochemical Sciences, Department of Chemistry, Bowling Green State University, Bowling Green, Ohio, USA. jkloster@bgsu.edu.
authors.forename: Liubov M
authors.initials: LM
authors.lastname: Lifshits
authors.affiliation: Center for Photochemical Sciences, Department of Chemistry, Bowling Green State University, Bowling Green, Ohio, USA. jkloster@bgsu.edu.
authors.forename: Darya S
authors.initials: DS
authors.lastname: Budkina
authors.affiliation: Center for Photochemical Sciences, Department of Chemistry, Bowling Green State University, Bowling Green, Ohio, USA. jkloster@bgsu.edu.
authors.forename: Varun
authors.initials: V
authors.lastname: Singh
authors.affiliation: Center for Photochemical Sciences, Department of Chemistry, Bowling Green State University, Bowling Green, Ohio, USA. jkloster@bgsu.edu.
authors.forename: Sergey M
authors.initials: SM
authors.lastname: Matveev
authors.affiliation: Center for Photochemical Sciences, Department of Chemistry, Bowling Green State University, Bowling Green, Ohio, USA. jkloster@bgsu.edu.
authors.forename: Alexander N
authors.initials: AN
authors.lastname: Tarnovsky
authors.affiliation: Center for Photochemical Sciences, Department of Chemistry, Bowling Green State University, Bowling Green, Ohio, USA. jkloster@bgsu.edu.
authors.forename: Jeremy K
authors.identifier: http://orcid.org/0000-0003-4987-8060
authors.initials: JK
authors.lastname: Klosterman