Vacuum Ultraviolet Absorption Spectra of Cyclic Compounds. I. Cyclohexane, Cyclohexene, Cyclopentane, Cyclopentene and Benzene¹

Field-dependent molecular ionization and excitation energies: Implications for electrically insulating liquids

“…46 The lowest excitation energy of cyclohexane is 7.11 eV, in good accordance to the experimental value around 7.0 eV. 47 Figure 3 (left) shows that the excited states vanish at fields higher than 5 MV/cm except in the y-direction where excitation energies remain close to the IP and should possibly be interpreted as ionized states. Figure 4 shows the lowest unoccupied molecular orbital (LUMO) in zero-field and the corresponding ionized orbital in 10 MV/cm in the x-direction, which clearly demonstrates the general effect of increasing the field, that an unoccupied orbital changes from a bound to an ionized state.…”

Self-Evaluation Processes

“…Gas phase vacuum UV absorption data showed that most saturated hydrocarbons do not begin to absorb until 180 nm, while unsaturated compounds begin to absorb at 200nm. [43][44][45] Ketones were also found to have absorption peaks at 200 nm.…”

“…10 For low NA lenses, it is conventionally given by where λ is the wavelength of the interfering light, n is the index of refraction of the medium in which the interference takes place and θ is the angle of incidence of the beams. 43 In a projection system immersion was predicted to result in an improvement in resolution by a factor of 1/n, according to Equation 1.1, by permitting lenses with NAs greater than one to be fabricated. Alternatively, if resolution was kept constant, it would result in an improvement in DOF by a factor of approximately n by redefining the expression for DOF as…”

Trigochinins D–I: six new daphnane-type diterpenoids from Trigonostemon chinensis

“…8 The counterclockwise manner of two chromophores in space thus defined the absolute configuration of 4 as depicted. Similarly, the first negative Cotton effect at l 255 nm of 5 coming from the exciton split between two chromophores of the a,b-unsaturated ketone 14 and the p-hydroxybenzoate; 13 and the first negative Cotton effect at l 258 nm of 6 arousing from the exciton coupling between two chromophores of the a,b-unsaturated ketone 14 and the 4-hydroxy-3-methoxy-benzoate, 13 indicated that compounds 5 and 6 shared the same absolute configuration as 4 (Fig. 4).…”