Energy lifetime

All the information collected from spectroscopic data such as energies, lifetimes and populations of the St and T, states can be incorprorated in the construction of a Jablonski type state diagram for a molecule. Such a diagram can be of immense help in predicting the photochemical behaviour of a molecule. 

B.C. Garrett, D.W. Schwenke, R.T. Skodje, D. Thirumalai, T.C. Thompson, D.G. Truhlar, Adiabatic and Nonadiabatic Methods for Energies, Lifetimes, and Branching Ratios of Reactive Resonances in Bimolecular Collisions, ACS Symposium Series 263, American Chemical Society, Washington DC, 1984,375. 

Operating temperature Cell voltage Cell current Current efficiency Consumption of electrical energy Lifetime of the cells... 

The fact that we are now able to compute transition energies, lifetimes of excited states, etc... with an accuracy competitive with the uncertainty of the most precise experimental measurements is not only satisfying for the theoreticians ego but has also a very fundamental impact. For example, the last value for the fine structure constant recommended by the 2000 CODATA could not have been obtained without the measurement of the anomalous magnetic... 

The photoreactivity of an excited state depends largely on its energy, lifetime, and the nature of the orbitals involved. It is therefore important to provide classification of the most common types of excited state in metal-containing species. 

The general processes and deactivation mechanisms in Scheme 15.1 have been already described in Chap. 1. In this chapter, we will be mainly concerned with aspects associated with the experimental determinations of these parameters (energies, lifetimes, quantum yields and rate constants) and with particular emphasis on the determination of rate constants of reactions occurring in the excited states. These reactions include the formation of additional species (2,3 and 4-state systems) or particular competition between deactivation processes—see the vibronic effect—and their dependence on the experiment conditions (solvent, temperature etc.). 

Finally, on the basis of the elements laid down in the previous chapters. Chapter 6 will focus on electrical hybridization of these storage systems, with a view to enhancing the performances (in terms of energy, lifetime, cost, etc.) of the new system thus formed. 

Changes in the substituents on the ligand are particularly important because excitation into the MLCT band places the excited electron on the ligand. Substituent changes do not only lead to differences in excited state energies, lifetimes, and redox potentials, but to steric and hydrophobicity differences that can have major effects on the chemical reactivity of the excited states. 

K.R. Siefermann, Y. Liu, E. Lugovoy, O. Link, M. Faubel, U. Buck, B. Winter, B. AbeL Binding energies, lifetimes and implications of bulk and interface solvated electrons in water. Nat. Chem. 2, 274-279 (2010)... 

At a more detailed level, the simple vdW model for large amplitude motion can be assessed by comparison of resonance energies, lifetimes, and partial widths to the exact scattering calculations. The exact resonance properties... 

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