Table 2 Photophysical properties of selected compounds
From: Organocatalytic iminium-assisted asymmetric B(sp²)-to-B(sp³) transformation
3 | solvent | \({\lambda }_{{{{\rm{abs}}}}}^{\max }\)(nm)a | εabs (M−1 cm−1) | Ф (%)b | \({\lambda }_{{{{\rm{em}}}}}^{\max }\)(nm) | Stokes shiftc (cm−1) |
|---|---|---|---|---|---|---|
3a | CH2Cl2 | 434, 309 | 10600, 22600 | 2 | 540 | 4520 |
THF | 430, 308 | 9800, 19600 | 1 | 541 | 4770 | |
CH3CN | 425, 308 | 10800, 22000 | 1 | 538 | 4940 | |
Solid | 4 | 548 | ||||
3h | CH2Cl2 | 438, 304 | 24500, 4000 | 3 | 511 | 3260 |
THF | 435, 305 | 26500, 5300 | 2 | 517 | 3650 | |
CH3CN | 431, 304 | 26700,5000 | 2 | 509 | 3560 | |
Solid | 49 | 548 | ||||
3l | CH2Cl2 | 455 | 26700 | 4 | 517 | 2640 |
THF | 451 | 25100 | 2 | 519 | 2910 | |
CH3CN | 450 | 29100 | 2 | 513 | 2730 | |
Solid | 56 | 599 | ||||
3n | CH2Cl2 | 425 | 16000 | 1 | 563 | 5770 |
3o | CH2Cl2 | 425 | 18000 | <1 | 536 | 4870 |
4j | CH2Cl2 | 425 | 14400 | <1 | 672 | 8650 |
4q | CH2Cl2 | 447 | 16100 | 3 | 506 | 2610 |
