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000640320 1001_ $$0P:(DE-H253)PIP1110154$$aSchaffner, Dorothee$$b0
000640320 245__ $$aTime-resolved X-ray spectroscopy of phenanthridine: elucidating the photodynamics of a nitrogen-containing polycyclic aromatic hydrocarbon
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000640320 520__ $$aThe photophysics and photochemistry of isolated phenanthridine have been investigated by time-resolved UV pump/X-ray probe spectroscopy at the SwissFEL free-electron laser combined with computations. Phenanthridine serves as the example for a polycyclic aromatic nitrogen-containing hydrocarbon (PANH), a class of molecules of considerable interest in material science and astrochemistry. It was excited at 268 nm into the bright 2ππ* state. The dynamics was subsequently probed by time-resolved X-ray photoelectron (TR-XPS) and X-ray absorption (TR-XAS) spectroscopy at the nitrogen 1s edge. Two time constants of τ1 ≈ 0.3 ps and τ2 ≈ 3 ps were determined. The excited-state dynamics was simulated using the trajectory surface hopping method and computed TR-XAS to support the band assignments. The study reveals a sequential decay to the electronic ground state via internal conversion. Spectra recorded over longer delay times indicate a dissociation on a time scale of several hundred picoseconds. 
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000640320 7001_ $$0P:(DE-HGF)0$$aDiemer, Kira$$b1
000640320 7001_ $$0P:(DE-HGF)0$$aMiao, Xincheng$$b2
000640320 7001_ $$0P:(DE-HGF)0$$aKaraev, Emil$$b3
000640320 7001_ $$0P:(DE-HGF)0$$aFlock, Marco$$b4
000640320 7001_ $$0P:(DE-H253)PIP1110097$$aTheil, Katharina$$b5
000640320 7001_ $$0P:(DE-H253)PIP1086307$$aSchouder, Constant$$b6
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000640320 7001_ $$0P:(DE-H253)PIP1091835$$aBarreau, Lou$$b8
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