172
6 Thermo-Responsive Phosphorescence Control Mediated …
Fig. 6.9 Emission decay of
the crystalline 1 observed at
543 nm in various
temperatures
A n τ n ) at every temperature, as shown for 1 in Tables 6.1, 6.3, 6.4 and 6.5. Decay
fits in the case of 2 (Table 6.5) require as many as four exponential functions leading
to an average temperature-independent time constant of 56.6 ± 7.5 μs. In the case
of 1 we were able to use double exponential functions with varying pre-exponentials
Table 6.3 Emission lifetimes fitted from the emission decays of the crystal 1 monitored at 543 nm
Temp. (K)
τ av /∝s a,b
τ 1 /∝s a (A/–)
τ 2 /∝s a (A/–)
τ 3 /∝s a (A/–)
CHI
298
11.4
10.0 (0.95)
38.3 (0.05)
–
1.001
278
12.6
10.2 (0.91)
38.2 (0.09)
–
0.999
253
17.7
10.1 (0.73)
38.4 (0.27)
–
0.972
233
19.7
10.1 (0.67)
38.9 (0.33)
–
1.013
213
21.1
10.0 (0.61)
38.8 (0.39)
–
0.960
195
32.0
10.1 (0.49)
38.8 (0.41)
111.0 (0.10)
1.005
All emission decay was fitted by tail fitting
a λ ex = 370 nm, λ em = 543 nm
b τ av = τ n A n
Table 6.4 Emission lifetimes fitted from the emission decays of the crystal 1 monitored at 498 nm
Temp. (K)
τ av /∝s a,b
τ 1 /∝s a (A/–)
τ 2 /∝s a (A/–)
CHI
298
7.34
2.44 (0.30)
8.05 (0.70)
0.981
253
8.58
2.10 (0.13)
9.51 (0.87)
1.027
233
8.16
2.07 (0.35)
11.5 (0.65)
0.995
213
8.94
2.10 (0.39)
13.3 (0.61)
1.053
195
11.65
2.37 (0.30)
15.7 (0.70)
1.159
All emission decay was fitted by tail fitting
a λ ex = 370 nm, λ em = 498 nm
b τ av = τ n A n