title: Ultrafast spectroscopy of the uranium(IV) and thorium(IV) bis(ketimide) complexes (C5Me5)2An[-N=C(Ph)(CH2Ph)]2 (An = Th, U).
abstract: Ultrafast pump-probe spectroscopic studies have been performed on (C 5Me 5) 2U[- N=C(Ph)(CH 2Ph)] 2 and (C 5Me 5) 2Th[- N=C(Ph)(CH 2Ph)] 2 including, for the uranium complex, the first direct measurement of dynamics of electronic deactivation within a 5f-electron manifold. Evidence has been found for strong coupling between the electronic ground state and the f-electron manifold which dominates the dynamics of the excited states of the bis(ketimide) uranium complex. These also demonstrate strong singlet-f manifold coupling, which assists in the deactivation of the photoexcited state of the uranium complex, and provide information on intersystem crossing and internal conversion processes in both complexes.
authors.affiliation: MPA-CINT, MS K771, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA. dhilton@uab.edu
authors.forename: David J
authors.initials: DJ
authors.lastname: Hilton
authors.forename: Rohit P
authors.initials: RP
authors.lastname: Prasankumar
authors.forename: Eric J
authors.initials: EJ
authors.lastname: Schelter
authors.forename: Verner K
authors.initials: VK
authors.lastname: Thorsmølle
authors.forename: Stuart A
authors.initials: SA
authors.lastname: Trugman
authors.forename: Andrew P
authors.initials: AP
authors.lastname: Shreve
authors.forename: Jaqueline L
authors.initials: JL
authors.lastname: Kiplinger
authors.forename: David E
authors.initials: DE
authors.lastname: Morris
authors.forename: Antoinette J
authors.initials: AJ
authors.lastname: Taylor