This review discusses how ultrafast organic photochemical reactions are controlled by conical intersections, highlighting that decay to the ground-state at multiple points of the intersection space results in their multi-mode character.
o-DCSP exhibits AIE, showing no fluorescence in its monomeric form but bright orange emission when aggregated. In contrast, i-DCSP displays consistent blue-white fluorescence in both monomeric and aggregated states.
The photocyclization of 3H-azepines exhibits a striking substituent-dependent preference toward the formation of the 2-azabicyclo[3.2.0]hepta-2,6-diene isomer, in agreement with experimental findings, while 6-substituted analogues remain unobserved.
The photochemistry of cyclopentadiene is investigated using nonadiabatic dynamics simulations. Observables for ultrafast X-ray scattering experiments are predicted and mapped onto the structural dynamics.
Ultrafast dynamics of internal conversion from higher-lying electronic states to S1 are governed by the details of potential energy landscape and by the locations of the Franck–Condon point, energy minima, and minimum-energy conical intersections.