Table 1. Summary of Optical and Electrochemical Properties of NBN-Doped Helicenes.
sample | λabs (nm)a | λmaxem (nm)a | υa – υf (cm–1)a | fwhm (nm)a | RMSD (Å)b | PLQY (%)a | t (ns)a | EHOMO (eV)c | Egapopt (eV)d | ΔEcal-H/L (eV)e |
---|---|---|---|---|---|---|---|---|---|---|
BN-[5]H | 447 | 461 | 679 | 25 | 0.064 | 45 | 6.5 | –5.41 | 2.74 | 3.50 |
BN-[6]H | 456 | 467 | 516 | 23 | 0.042 | 55 | 5.3 | –5.43 | 2.69 | 3.42 |
BN-[7]H | 460 | 494 | 1496 | 43 | 0.139 | 37 | 5.0 | –5.39 | 2.61 | 3.35 |
E[6]H | 483 | 507 | 980 | 35 | 0.106 | 49 | 6.0 | –5.38 | 2.51 | 3.22 |
E[4]H | 496 | 516 | 516 | 28 | 0.086 | 47 | 5.1 | –5.43 | 2.45 | 3.15 |
Measured in a toluene solution (∼1 × 10–5 M) and determined using the absolute quantum yield method.
Calculated at the (TD)B3LYP/6-31G(d) level.
Estimated by the onset of the oxidation peaks in dichloromethane and calculated according to EHOMO = −(4.8 + Eonsetox) eV.
Estimated by the intersection of absorption and emission band.
Calculated at the B3LYP-D3BJ/Def2-TZVP (solvent toluene, PCM model) level.