Emission data, optical band gap, Stoke's shift and quantum yield of 2–10 in the solution state.
| Dye | λ emi a nm, (Eoptg eV)b | Stoke's shiftc, cm−1 (% ϕF)d | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Toluene | THF | Chloroform | DCM | DMSO | Toluene | THF | Chloroform | DCM | DMSO | |
| 2 | 520 (2.41) | 530 (2.40) | 550 (2.33) | 552 (2.32) | 558 (2.31) | 2414 (12.73%) | 2906 (11.30%) | 2959 (6.36%) | 3435 (3.64%) | 3584 (0.14%) |
| 3 | 515 (2.46) | 526 (2.44) | 546 (2.38) | 547 (2.37) | 553 (2.37) | 2854 (9.09%) | 3177 (11.11%) | 3519 (4.72%) | 3793 (2.36%) | 4040 (0.19%) |
| 4 | 570 (2.30) | 585 (2.26) | NA (2.19) | NA (2.24) | NA (2.24) | 3961 (0.71%) | 4551 (0.11%) | NA | NA | NA |
| 5 | 503 (2.52) | 526 (2.52) | 529 (2.49) | 531 (2.49) | NA (2.49) | 2390 (16.36%) | 3496 (0.55%) | 3517 (0.14%) | 3792 (0.04%) | NA |
| 6 | NA (2.38) | 507 (2.38) | 537 (2.35) | NA (2.34) | NA (2.31) | NA | 2226 (0.06%) | 2654 (0.16%) | NA | NA |
| 7 | 486 (2.60) | 519 (2.55) | 530 (2.52) | 538 (2.52) | 555 (2.51) | 3064 (18.18%) | 4094 (13.33%) | 4387 (9.09%) | 5053 (5.45%) | 6253 (0.34%) |
| 8 | NA (2.14) | NA (2.13) | NA (2.10) | NA (2.10) | NA (2.07) | NA | NA | NA | NA | NA |
| 9 | NA (2.64) | NA (2.48) | NA (2.45) | NA (2.44) | NA (2.42) | NA | NA | NA | NA | NA |
| 10 | 508 (2.52) | 534 (2.52) | 540 (2.45) | 542 (2.45) | 543 (2.44) | 3955 (13.63%) | 4429 (6.85%) | 4845 (5.45%) | 4914 (4.91%) | 4678 (0.46%) |
a
Recorded in 10−5 M solution.
b
Optical band gap estimated using offset wavelength derived from the low energy absorption band 
.
c
Stoke's shift calculated according to the equation Δν = (1/λabs − 1/λem) × 107 (cm−1)
d
Percentage quantum yield (in parentheses) with reference to quinine sulfate (ϕF = 0.54 in 0.5 M H2SO4). NA: quenched emission, Bold: emission property (wavelength, Stoke's shift and quantum yield) of dyes having very low intensity.