Lowest excited electronic state

Brus L E 1984 Electron-electron and electron-hole Interactions In small semiconductor crystallites the size dependence of the lowest excited electronic state J. Chem. Phys. 80 4403-9... 

Crystallites "The Size Dependence of the Lowest Excited Electronic State" /. Chem. Phys., 80, 4403. 

Zgierski MZ, Patchkovskii S, Lim EC (2005) Ab initio study of a biradical radiationless decay channel of die lowest excited electronic state of cytosine and its derivatives. J Chem Phys 123 081101... 

Lippens PE, Lanno M (1990) Comparison between calculated and experimental values of the lowest excited electronic state of the small CdSe crystallites. Phys Rev B 41 6079-6081... 

V2) a(l)/i(2) — P( )a(2)) by the Pauli principle, is actually a1 Ag state, the lowest excited electronic state of the 02 molecule. The A =0 functions above are converted into each other by the permutation operator Pn, but the symmetric and antisymmetric combinations have definite symmetry under Pn ... 

The 3a and In molecular orbitals are composed primarily of carbon 2pa and 2pn atomic orbitals respectively, but the 3 a molecular orbital will have a small but significant admixture of the hydrogen l.v atomic orbital. The lowest excited electronic states arise from a 3a - In electronic excitation, and four different electronic states are possible ... 

Table 10.19. Spin-orbital single configuration representations for the ground and lowest excited electronic states of CH. Only the spatial and spin coordinates of the three highest-energy electrons are specified...

The electronic ground state of CS is the same as that of CO, that is, an state. The four lowest excited electronic states are all triplet states, but close by in energy there is an A 1 n state, lying 38 794 cm-1 above the ground state. This state can be populated by allowed electronic excitation from the ground state, and is therefore... 

S<7g)2(lsau)2(2scrg)2(2sau)2(2p7Tu)4(2pag)1 X2 +, and the two lowest excited electronic states are... 

Table 3. Irreducible representations of the lowest excited electronic states of [Pt(CN)4]2 resulting from excitations to the lowest excited molecular orbital. Electric dipole transitions are only allowed from the ground state Ajg to Ai (z) and E (x,y), respectively...

From all these experimental results it follows that the lowest excited electron states of the self-traps are mainly of triplet character and have the symmetries A u and E , respectively37,93 5, 151 30). (See also Fig. 13.) The transition between 1AJU and AJg is strongly forbidden. Due to vibronic coupling, however, relatively weak transitions from the 1AJU... 

In the same sense, in condensed media, it is often assumed that upper excited electronic states relax rapidly by internal conversion and vibrational equilibration to the lowest excited electronic state of the same multiplicity. Thus, referring to Figure 3, which extends the mechanism of Figure 1, if two excited states, A2 and A, have the same multiplicity, it is likely that the upper state, A, would undergo rapid internal conversion to A2 in solution. The sequence 03-32 could then be considered as the equivalent of step 02, provided that neither of steps 34 or 35 could compete, under these conditions, with step 32. A common diagnostic test (but not proof) of this situation is independence of the quantum yield on wavelength. 

The excited state geometry of the W(CO)jpyridine complex in its lowest excited electronic state is calculated by converting the dimensionless to... 

In general, the effect of the monatomic rare gas, usually used as a buffer, is much weaker the rate constant for the interaction of the subexcitation electron is of the order of 10 dm mol s . This implies a half life for the interaction of the subexcitation electron of the order of 13 microseconds in 1 Torr of a pure rare gas, or about 20 nanoseconds at one atmosphere. However, this process only reduces the energy of the subexcitation electron to a level just below that of the lowest excited electronic state of the probe gas. 

L, E, Brus, A simple-model for the ionization-potential, electron-affinity, and aqueous redox potentials of small semiconductor crystallites, J. Chem. Phys., 79 5566-5571, 1983 L, E, Brus, Electron electron and electron-hole interactions in small semiconductor crystal-htes - the size dependence of the lowest excited electronic state, J. Chem. Phys., 80 4403-4409,1984... 

Polymer photophysics is determined by a series of alternating odd (B ) and even (Ag) parity excited states that correspond to one-photon and two-photon allowed transitions, respectively [23]. Optical excitation into either of these states is followed by subpicosecond nonradiative relaxation to the lowest excited state [90]. This relaxation is due to either vibrational cooling within vibronic sidebands of the same electronic state, or phonon-assisted transitions between two different electronic states. In molecular spectroscopy [146], the latter process is termed internal conversion. Internal conversion is usually the fastest relaxation channel that provides efficient nonradiative transfer from a higher excited state into the lowest excited state of the same spin multiplicity. As a result, the vast majority of molecular systems follow Vavilov-Kasha s rule, stating that FT typically occurs from the lowest excited electronic state and its quantum yield is independent of the excitation wavelength [91]. 

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