Table 1. Absorbance and Emission Propertied of Precursor 7 and Triptycene Confined Dyes 9–12.
| compound | λabsa,c | λemb,ci | Φsolc,d | τc,e | λabsa,f | λemb,f,i | Φfilmd,f | τe,f,g |
|---|---|---|---|---|---|---|---|---|
| 7 | 479 | 603 (108) | 5 | 1.37 | 478 | 606 (66) | 13h | 3.45 |
| 9 | 449 | 503 (33) | 94 | 16.8 | 444 | 533 (83) | 22 | 5.62 |
| 10 | 522 | 532 (24) | 84 | 18.6 | 520 | 548 (102) | 0.5 | 0.58 |
| 11 | 451 | 505 (29) | 86 | 16.5 | 457 | 546 (92) | 1.4 | 1.00 |
| 12 | 522 | 538 (25) | 90 | 17.5 | 523 | 590 (93) | <0.1 | 1.20 |
a
Maximum absorption wavelength (nm)
b
Maximum emission wavelength (nm).
c
Values obtained in solution (CHCl3, ca. 1 × 10–5 M).
d
Fluorescence quantum yield (%).
e
In nanoseconds (ns).
f
From solid film (cast film from chloroform).
g
Average lifetimes (see the ESI).
h
From powders.
i
fwhm = full width at half-maximum.