Electronic energy level diagram

Figure 4 Schematic electron energy level diagram (a) of a core-level photoelectron ejection process (one electron process) (b) core-level photoelectron ejection process with shake-up (two- electron process) (c) schematic XPS spectrum from (a) plus (b) (d) Cu 2pa/2 XPS spectrum for Cu in CU2O and Cu in CuO. The latter shows strong shake-up features.

Figure 11-3. Electron energy level diagram of PPV and work functions of selected contael metals used in polymer LEDs.

Figure 2. Electronic energy level diagram and transitions for poly(ethylene terephthalate) (--------------------------------) estimated levels (9)...

Figure 3. Electronic energy level diagram and transitions for polyfethylene tereph-thalate-co-2,6-naphthalenedicarboxylate) yarn (9)...

Figure 4. Electronic energy level diagram for anthracene illustrating the photophysical transitions (including reaction with the initiator from both the singlet and triplet states) and the associated kinetic constants.

Ionic conductors are ionic compounds. Therefore it is appropriate to start with ions rather than atoms to construct the electronic energy level diagrams. Fig. 3.2 illustrates such a construction for the electronic and ionic insulator MgO. The energy levels and 0 correspond... 

Figure 7-4. Schematic electron energy level diagram in the system metal-oxide-oxygen gas. C = conduction band, V = valence band,...

Fig. 2.3. Electronic energy level diagram for the hydrogen atom.

How can this be accounted for by the orbital overlap picture Obviously, there must be more than four orbitals available in order for more than four covalent bonds to be formed. Inspection of the electronic energy level diagram, Fig. 2.7, shows that for phosphorus the next higher energy orbitals above the 3p levels are 4s orbitals or 3d orbitals. It can be demonstrated by calculation that d orbitals would over-... 

FIGURE 8. Electronic energy level diagram of Pt polyynes with group 14 and 16 main group elements based on absorption and PL data. Dashed lines represent the levels for P3. The S0 levels are arbitrarily shown to be of equal energy, and all energy values are... 

The complete electronic energy level diagram of a representative transition metal complex (D4h CuCI42 ) is given in Figure 1.16. 

FIGURE 1.16 The complete electronic energy level diagram of D4h CuCl42 depicting the various XAS pre-edge and edge transitions.17... 

Figure 4 Electronic energy level diagram for Pbn, n = 3 — 14. Degeneracies are indicated by a number attached to the level. A vertical bar indicates the HOMO-LUMO gap.

Fig. 5. (a) Bulk electronic concentration at the metal—oxide interface and electron-hole concentration at the oxide—oxygen interface associated with equilibrium interfacial reactions, (b) Electronic energy-level diagram illustrating the dielectric (or semiconducting) nature of the oxide, with the possibility of electron transport (e.g. by tunneling or thermal emission) from the metal to fill O levels at the oxide—oxygen interface to create a potential difference, VM, across the oxide. 

Figure 1. Electronic energy level diagram for gas phase actinide hexafluorides. The regions in which a given hexafluoride exhibits continuous absorption are shown shaded with diagonal lines. 5f electron states are shown as short horizontal lines. The thermodynamic dissociation limits and resultant gas phase products are shown to the right of the energy level diagram for each hexafluoride. UF (g), a 5f system, has no low-lying electronic levels and is thermodynamically more stable than NpF (g) or PuF Cg). For these reasons UF is unlikely to be a good model compound for transuranic hexafluoride photochemistry studies.

An electronic energy-level diagram determined from the laser-induced fluorescence spectrum of 9-hydroxyphenalenone [6] in a neon matrix is shown in Fig. 3. An emission line from the lowest vibrational level in the Si state is found to be split into a doublet. The energy difference between these two lines... 

Figure 24 Simplified 1-electron energy level diagram for (CO)5WC(OMe)Ph. (Reprinted with permission from Ref. 381. 1983 American Chemical Society)...

A one-electron energy level diagram appropriate for the compounds in this series is shown in Fig. 4 and illustrates both and ir[lbi(Tr) -... 

Fig. 16. One-electron energy level diagram for neutralization of a positive ion near a metal surface. The metal conduction band is shown on the left. The dashed and solid curves represent the potential energy for an electron when the ion is at infinite and close distances to the surface, respectively. The affinity level for the ion shifts upward and broadens as the ion approaches the surface.

A one-electron energy level diagram appropriate for the compounds in this series is shown in Fig. 4 and illustrates both o [a(o )]- and n [lhi(fl )]-bonding of the carbene to the metal (765). The MLCT transition is represented by the - b2 2bi one-electron transition whereas LF transitions can involve population of both the 2oi and 3ai orbitals. The position of the MLCT transitions in these complexes is a very sensitive function of the carbene substituents (163-166), implying that the position of the 2bi( n ) orbital can vary considerably. 

Lithium 1+ Ion Plus Free Electron Energy Level Diagram... 

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