Table 2. Luminescence Data for Films Made from Boron Polymers of Different Molecular Weights.
| fluorescence |
RTP |
||||
|---|---|---|---|---|---|
| polymer | Mna (kDa) | λemb (nm) | τpw0c (ns) | λemd (nm) | τpw0e (ms) |
| 9a | 5.4 | 526 | 12.85 | 558 | 69.76 |
| 9b | 7.7 | 496 | 8.84 | 555 | 102.7 |
| 9c | 16.1 | 461 | 2.57 | 552 | 130.9 |
| 10a | 6.8 | 491 | 3.69 | 568 | 10.50 |
| 10b | 8.8 | 483 | 1.71 | 565 | 11.61 |
| 10c | 11.7 | 467 | 1.02 | 566 | 14.36 |
| 10d | 26.2 | 460 | 0.76 | 565 | 14.64 |
| 11a | 5.2 | 533 | 13.39 | 550 | 20.26 |
| 11b | 7.5 | 512 | 9.10 | 540 | 61.94 |
| 11c | 9.5 | 505 | 7.74 | 545 | 91.14 |
| 12a | 5.6 | 518 | 5.00 | 538 | 25.95 |
| 12b | 12.9 | 500 | 3.47 | 538 | 40.76 |
| 12c | 16.6 | 495 | 3.25 | 539 | 45.81 |
a
Number-average molecular weights detected by DAD, LS/RI detectors in THF solvent.
b
Steady-state fluorescence spectra emission maxima under air. Excitation source: 369 nm xenon lamp.
c
Fluorescence lifetimes excited with a 369 nm light-emitting diode (LED) monitored at the emission maxima. All fluorescence lifetimes are fitted with multiexponential decay. Detailed lifetime data are provided in Table S7.
d
Delayed emission spectra maxima under N2. Excitation source: xenon flash lamp.
e
Pre-exponential weighted RTP lifetimes. Excitation source: xenon flash lamp; RTP lifetime fit to triple-exponential decay.