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13 Φεβ 2015 · Excited‐state properties of molecules play a pivotal role in understanding their photophysical and photochemical behaviors. With the fast development of computational methodologies, the low‐lying states of biorelated systems have been extensively investigated theoretically.
16 Μαρ 2023 · To consider what happens in the process of fluorescence, we need to think of the possible energy states for a ground and excited state system. Draw an energy level diagram for a typical organic compound with \(\pi\) and \(\pi\) * orbitals.
In quantum mechanics, an excited state of a system (such as an atom, molecule or nucleus) is any quantum state of the system that has a higher energy than the ground state (that is, more energy than the absolute minimum).
1 Ιαν 2014 · In a typical closed-shell ground-state molecule, the reaction usually begins on the potential energy surface of the excited state (S 1 or higher) at the Franck–Condon geometry (i.e., at the ground-state equilibrium geometry) and evolves either to the S 1 state minimum, from which it might emit, or to a crossing region with the ground state.
26 Ιουν 2022 · The excited state can be considered a new chemical species with characteristics and mainly its reactivity different from the ground state due to the great energy accumulated in the process of formation of the excited state.
1 Ιαν 2011 · The unimolecular excited-state processes described in Sects. 1.6.2 and 1.6.3 do not cause any chemical change in the light-absorbing molecule and can thus be classified as photophysical processes. Excited states can, however, achieve deactivation to ground-state species also by a variety of chemical processes. As energy-rich species, excited ...
25 Αυγ 2021 · Among many chemical processes induced with photon absorption, the excited-state intramolecular proton transfer (ESIPT) stands out with its ultrashort timescale and strong impact on the molecular electronic structure, which is often manifested with large emission Stokes shifts.
