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. 2022 May 4;61(19):7296–7307. doi: 10.1021/acs.inorgchem.1c03901

Table 3. Emission from the Lowest T1 State (Eem), Distortion Energy Edist (Defined as the Difference between the Energy of the Ground State at Its Optimum and at the Excited State Geometry), and Stabilization Energy Estab (Estab = Edist + Eem)a.

  structure
  Cu1sym1
Cu1nosym
Cu1sym2
  C2 C1 C1 C1b C2 C1
Eem 1.668 1.507 1.460 1.449 1.544 1.405
λem 743 823 849 855 803 882
Edist 0.281 0.371 0.365 0.387 0.333 0.404
Estab 1.949 1.878 1.824 1.837 1.877 1.810
ΔEST 0.222 0.197 0.211 0.184 0.266 0.232
SOC 0.1 19.0 33.6 15.0 0.0 25.8
  20.2 34.2 37.8 27.0 20.3 37.9
  20.2 34.2 37.8 27.0 20.3 37.9
a

Energies in eV, emission wavelength in nm (λem), S1-T1 energy splitting (ΔEST) in eV at T1 geometry and S1-T1 spin orbit coupling in cm–1 of the lowest triplet states T1 at T1 geometry for the three rotamers and group symmetry.

b

The two phen ligands of Cu1 being inequivalent, the emission properties from both have been computed.