Table 2. Overview of Selected Photophysical Parameters of the Pyrene-Decorated Ligand LPyr and the Isostructural Series [Cr], [Mn]PF6, and [Fe](PF6)2a.
| compound | λabs,1ILPyr (nm) | λem,1ILPyr (nm) | τ1ILPyr (ns) | ϕ1ILPyr (%) | λabs,CT (nm)b | λem,3MLCT (nm) | τ3MLCT | ϕ3MLCT (%) | λem,max at 77 K (nm)c | ref |
|---|---|---|---|---|---|---|---|---|---|---|
| LPyr | 345 | 410 | 4.2 | 86 | N/A | N/A | N/A | N/A | 385 | this work |
| [Cr] | 350 | N/A | N/A | N/A | 540 | 840 | 1.1 ns | 0.01 | 727 | (51), this work |
| [Mn]PF6 | 350 | 430 | 3.1 | 2.4 | 388 | N/A | 14 ps | dark state | 435; 610 | this work |
| [Fe](PF6)2 | 350 | 415 | 3.8 | 14 | 375 | N/A | N/A | dark state | 435 | this work |
a
Solution state data were recorded in THF at 20 °C using deaerated solvents for [Cr] and [Mn]+ and aerated solvents for LPyr and [Fe]2+.
b
Absorption band maxima refers to the lowest-lying charge transfer state, i.e., MLCT for [Cr], IL/MLCT for [Mn]+ and ILCT for [Fe]2+.
c
Data obtained in deaerated 2-methyl-THF.