Optoelectronic properties of the three azaborine helicenes.
| λ abs/nm [ε/105 M−1 cm−1] | λ PL/nm | Φ PL b | E Red Vc | |
|---|---|---|---|---|
| 1-Mesa | 255 [0.345], 279 [0.152], 329 [0.063], 344 [0.059], 370[0.056], 387 [0.055] | 404, 422 | 0.30 | −2.788 |
| 6-Mesa | 257 [0.531], 299 [0.203], 312 [0.222], 326 [0.213], 370 [0.096], 397 [0.053] | 419, 436 | 0.21 | −2.783 |
| 7-Mesa | 283 [0.379], 295 [0.381], 325 [0.118], 345 [0.106], 361 [0.125], 374 [0.134] | 395, 411 | 0.42 | −2.923 |
a
Absorption and emission spectra are of 10−5 M DCM solutions.
b
Calculated using 9,10-diphenylanthracene as a standard.
c
Reduction potentials were calibrated with ferrocene as an internal standard and referenced vs. Fc+/Fc.