94
3 Luminescent Mechanochromism of a Chiral Complex: Distinct …
Table 3.2 Photophysical properties of (rac)-1G, (S)-1G, (rac)-1Gground, and (S)-1Gground
Φ em /−
τ av /μs e,f (λ em /nm)
τ 1 /μs e (A/−)
τ 2 /μs e (A/−)
(rac)-1G
0.081 a
5.34 (546)
1.40 (0.90)
10.11 (0.10)
(S)-1G
0.023 b
5.34 (517)
1.60 (0.87)
9.60 (0.13)
(rac)-lG ground
0.2 l c
5.10 (664)
1.41 (0.87)
8.86 (0.14)
(S)-lG ground
0.13 d
5.36 (664)
1.38 (0.87)
9.37 (0.13)
a λ ex = 454 nm. b λ ex = 458 nm. c λ ex = 449 nm. d λ ex = 445 nm. e λ ex = 370 nm. f τ av =
A 1 τ 2
1 + A 2 τ 2
2 + · · ·
/(A 1 τ 1 + A 2 τ 2 + · · ·). Emission decay were fitted by tail fitting
Fig. 3.9 TGA profiles of (rac)-1G [black line in (a)], (rac)-1Gground [red line in (a)], (S)-1G
[black line in (b)], and (S)-1Gground [red line in (b)] at heating rates of 5 °C min −1
3.7.5 NMR Spectra and Elemental Analysis
See Fig. 3.10 and Table 3.3.
3 Luminescent Mechanochromism of a Chiral Complex: Distinct …
Table 3.2 Photophysical properties of (rac)-1G, (S)-1G, (rac)-1Gground, and (S)-1Gground
Φ em /−
τ av /μs e,f (λ em /nm)
τ 1 /μs e (A/−)
τ 2 /μs e (A/−)
(rac)-1G
0.081 a
5.34 (546)
1.40 (0.90)
10.11 (0.10)
(S)-1G
0.023 b
5.34 (517)
1.60 (0.87)
9.60 (0.13)
(rac)-lG ground
0.2 l c
5.10 (664)
1.41 (0.87)
8.86 (0.14)
(S)-lG ground
0.13 d
5.36 (664)
1.38 (0.87)
9.37 (0.13)
a λ ex = 454 nm. b λ ex = 458 nm. c λ ex = 449 nm. d λ ex = 445 nm. e λ ex = 370 nm. f τ av =
A 1 τ 2
1 + A 2 τ 2
2 + · · ·
/(A 1 τ 1 + A 2 τ 2 + · · ·). Emission decay were fitted by tail fitting
Fig. 3.9 TGA profiles of (rac)-1G [black line in (a)], (rac)-1Gground [red line in (a)], (S)-1G
[black line in (b)], and (S)-1Gground [red line in (b)] at heating rates of 5 °C min −1
3.7.5 NMR Spectra and Elemental Analysis
See Fig. 3.10 and Table 3.3.