Table 2.
Photophysical Properties of the CuI Complexes in CH3CN.
| Complex | λabsa/nm (εb/M−1 cm−1) | λemc/nm | Φemd | τeme/μs |
|---|---|---|---|---|
| Cu(H) | 375 (~2,300f) | 575 | 0.021 | 0.96 |
| Cu(ph) | 384 (~6,000f) | 590 | 0.027 | 0.99 |
| Cu(Bph) | 388sh (~7,200f) | 596 | 0.028 | 1.2 |
| Cu(NCph) | 392 (~5,200f) | 624 | 0.0073 | 0.19, 0.74 |
| Cu(NO2ph) | 390 (~6,300f) | 620 | 0.0009 | 0.004, 0.89 |
| Cu(3fu) | 387 (~4,900f) | 593 | 0.026 | 0.0015, 0.0075, 0.054, 1.37 |
| Cu(3th) | 386 (~6,000f) | 596 | 0.041 | 1.26 |
| Cu(3Bzth) | 385sh (~6,100f) | 600 | 0.042 | 0.98 |
| Cu(2th) | 390sh (~6,600f) | 618 | 0.021 | 0.001, 0.006, 8.29 |
| Cu(2Bzth) | 400sh (~8,700f) | 631 | 0.0093 | 0.005, 1.2, 14.1 |
| Cu(2Bzfu) | 410sh (~11,600f) | 620sh, 650 | 0.0081 | 0.004, 32.2 |
a
λabs, 1MLCT absorption maxima;
b
ε, molar extinction coefficients;
c
λem, emission maxima;
d
Φem, emission quantum yield;
e
τem, emission lifetimes;
f
minimum values considering partial decomposition to the corresponding homoleptic-type CuI complexes (see the spectra in Figure S1);
c−esamples degassed using the freeze–pump–thaw method.