Lowest energy excited state

The 3 Pi/2, 3 P2/2 excited states involved in the sodium D lines are the lowest energy excited states of the atom. Consequently, in a discharge in the vapour at a pressure that is sufficiently high for collisional deactivation of excited states to occur readily, a majority of atoms find themselves in these states before emission of radiation has taken place. Therefore... 

A review16 with 89 references is given on the excited state properties of the low valent (0 and + 1) bi- and trinuclear complexes of Pd and Pt. Physical characterization of the nature of the lowest energy excited states along with their photoinduced chemical reactivities toward oxidative additions is discussed. 

Inspecting the character tables of Figure 13, we notice that the first (lowest-energy) excited state, corresponding to the electronic transition jr -> ji, is, for the s-trans isomer, Bu, for the s-cis, Hi and finally for the skewed form, B. This transition is therefore electrically allowed in all three cases, being in-plane polarized for the former two cases as shown in Scheme 9. 

Time-resolved femtosecond (fs) absorption spectroscopy has been applied to investigate the earliest events of the decay of [Ru(bpy)3] " and provides information relating to the dynamics associated with the evolution of the Franck-Condon state to the lowest-energy excited state of [Ru(bpy)3]. Within 300 fs of the initial excitation, the latter process is effectively complete. The conclusions of this work are of particular importance in terms of updating the views concerning the relaxation of [Ru(bpy)3]. ... 

Since for 3 there exist mixed contributions (m n Eq. (5)), a model which follows the evolution of P with the number of lowest-energy excited states cannot highlight the tme state contributions. Dirk and Kuzik [55] have proposed the missing-state analysis which determines the relative importance of states by considering the effect of their absence. This relative importance is defined as... 

The yellow flame colour is due to atomic emission from sodium where the spectrum is dominated by a broad emission centred on 590 nm (the resonance transition is that from the ground state to the lowest energy excited state in absorption and the reverse will apply in emission). 

The CR-EOMCCSD(T) sf method is currently under development, so that we cannot show too many examples of the actual applications yet. However, we have already tested the CR-EOMCCSD(T) approach using the electronic excitations in the CH+ ion as an example. The CR-EOMCCSD(T)j > results for the three lowest-energy excited states of the symmetry and two lowest-energy states of the H and symmetries, obtained at the equilibrium geometry Rc-h = Re = 2.13713 bohr and the same [5s3pld/3slp] basis set of Ref. [103] as used in the MMCC(2,3)/CI, MMCC(2,3)/PT, and CR-EOMCCSD(T) calculations discussed in Section 3.1, are shown in Table 2. As one can see, the CR-EOMCCSD(T) 5f approach is as effective in improving the EOMCCSD results as the CR-EOMCCSD(T) method analyzed in Section 3.1.2. This is particularly true for the 2 1 A, and 2 A states that are dominated by double exci-... 

The nature of the lowest energy excited state and the probability of excimer emission... 

Excimer Photodimer Lowest energy excited state... 

Almost all square planar complexes with simple ligands are diamagnetic and contain a metal ion with the -electronic configuration. Thus the ground state is lAig. The lowest energy excited states will be described separately for case 1 and case 2. 

Table 2.1 Isotopes of arsenic (Audi et al., 2003 Holden, 2007 Lindstrom, Blaauw and Fleming, 2003).15As is the only stable arsenic isotope. The possible decay modes include electron capture (EC), electron emission (P ), positron emission (P+), proton decay (p), internal transition (IT), and neutron emission (ne). Superscripts on some of the arsenic isotope mass numbers designate excited-state isomers. The first (lowest energy) excited state is designated with an m and a second excited state is designated with an n. ...

Figure 7 Energy level diagram of lowest energy excited states of europium and terbium ions. Only the emissive excited states within the 5Dj manifold are shown.

A variety of spectroscopic methods has been used to determine the nature of the MLCT excited state in the /ac-XRe(CO)3L system. Time-resolved resonance Raman measurements of /ac-XRe(CO)3(bpy) (X = Cl or Br) have provided clear support for the Re -a- n (bpy) assignment of the lowest energy excited state [44], Intense excited-state Raman lines have been observed that are associated with the radical anion of bpy, and the amount of charge transferred from Re to bpy in the lowest energy excited state has been estimated to be 0.84 [45], Fast time-resolved infrared spectroscopy has been used to obtain the vibrational spectrum of the electronically excited states of/ac-ClRe(CO)3(bpy) and the closely related/ac-XRe(CO)3 (4,4 -bpy)2 (X = Cl or Br) complexes. In each... 

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