The photodissociation dynamics of alkyl iodides along the C-I bond are captured by attosecond extreme-ultraviolet (XUV) transient absorption spectroscopy employing resonant ~20 fs UV pump pulses. The methodology of {previous|prior|earlier|preceding} experiments on CH3I [Chang, et al., J. Chem. Phys. 154, 234301 (2021)] is extended {to the|towards the|for the} investigation of a C-I bond-breaking reaction {in the|within the|inside the} dissociative A-band of C2H5I, i-C3H7I, and t-C4H9I. Probing iodine 4d core-to-valence transitions {in the|within the|inside the} XUV enables {one|1|a single|one particular} to map wave packet bifurcation at a conical intersection {in the|within the|inside the} A-band {as well|also|too|at the same time} as coherent vibrations {in the|within the|inside the} ground state {of the|from the|in the|on the|with the|of your} parent molecules. {Analysis|Evaluation} of spectroscopic bifurcation signatures yields conical intersection crossing {times|occasions|instances}, {found|discovered|identified|located} {to be|to become} 15 ± {4|four} fs for CH3I, 14 ± {5|five} fs for C2H5I, and 24 ± {4|four} fs for i-C3H7I and t-C4H9I. Observations of coherent vibrations, resulting from a projection of A-band structural dynamics onto the ground state by resonant impulsive stimulated Raman scattering (RISRS), indirectly reveal multimode C-I stretch and CCI bend vibrations {in the|within the|inside the} A-band of C2H5I, i-C3H7I, and t-C4H9I. 7-Bromo-4-chloroquinolin-3-amine site 887144-94-7 supplier PMID:23357584
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