Pressure effects on the absorption spectra of Na doped in solid Ar

Two-Photon Absorption Properties of <i>s</i>-Triazine Derivatives With Near Octupolar Symmetry

“…The dihedral angles between the triazine core and each branch are 149.6º, 128.1º, 150.8º, respectively. All these data prove poor planarity of A1, whereas two molecules B has better planar symmetry [11].…”

“…Therefore, the density of excited state does not increase by incorporating more uniform branches into the molecule. For example, the three branched compound B has almost the same abs max  as their two-branched analogs (the difference between their abs max  is no more than 2 nm) [11], which indicates that adding another uniform branch to forming an octupolar molecule does not increase the density of excitatation states, therefore does not lead to distinct decrease of the HOMO-LUMO gap. However, introducing a different branch into a two-branched molecule can increase greatly the density of excitated state, which result in remarkable spectral red-shifts from group B to group A. i Absorption peak position in nm (110 -5 mol L -1 ).…”

“…1. A1 crystallized to monoclinic system, P2(1)/c space group, a=9.6948 (11), b=27.379(4), c=9.8590(13) nm, α = 90°, β= 96.755 (8), γ = 90, V = 2598.8(6) nm 3 , Z = 4. R 1 = 0.1020, R 2 = 0.2916 for I > 2( I ).…”