C12H25
C12H25
C12H25
C12H25
320 nm
5.
3
nm
400 nm
Co-assembly
g
lum = 1.2 x 10 –3
g lum x10 3
6
3
0
–3
–6
0.6
0.4
0.2
0.0
350
400
450
500
550
600
650
Wavelength (nm)
DC (V)
g
lum = 3 x 10 –3
Energy transfer
HN
HN
HN
O
O
O
O O
O
N
8
BPEA
a
b
NH
*
*
NH
NH
Fig. 11.8
(a) Chemical structures of 8
and BPEA, and schematic illustration of energy transfer amplified CPL in co-assembly nanohelix. Under excitation at
400 nm, the composite nanohelix showed green CPL with g
lum
¼ 1.2
 10
À3
(top pattern), while energy transfer boosted CPL with a relatively large value
g
lum
¼ 3.0
 10
À3
under excitation at 320 nm (bottom pattern). (b) CPL dissymmetry factor g
lum versus wavelength,
λ ex
¼ 320 nm (blue line) and
λ ex
¼ 400 nm
(red line). Reproduced with permission [27]. Copyright 2017, Nature Publishing Group
11 Circularly Polarized Luminescence from Gelator Molecules: From Isolated. . .
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