1. Angew. Chem. Int. Ed. 2014, Early view
Dynamic Switching of the Circularly Polarized Luminescence of Disubstituted Polyacetylene by Selective Transmission through a Thermotropic Chiral Nematic Liquid Crystal
Benedict A. San Jose, Jialin Yan, and Kazuo Akagi*
Department of Polymer Chemistry, Kyoto University (Japan)

2. Circularly Polarized Luminescence
(tunable solid-state laser)
S. Furumi et al.,
Adv. Mater., 2010, 22, 886. →
(Polychromatic LC laser array toward display application)
S. M. Morris et al.,
Opt. Express,
2008, 16,

3. Purpose
Thermotropic N*-LC
“Selective Reflection”

4. Structures of Components
bM = 449 mm-1 for (R)-D1
bM = 408 mm-1 for (S)-D1
B. A. San Jose et al.,
JACS, 2012, 134,
M. Guo et al., JACS, 2007, 129, 8519.

5. (Thermotropic LC phase)
CPL-switchable Cell
N*-LC layer: PCH 302:PCH 304:(S)-D1
(= 100 : 100 : 2.2 molar ratio)
(Thermotropic LC phase)
25 ˚C: N*-LC phase
→　36 ˚C: isotropic phase

6. Miscibility Test for the Helical Sense

7. Disubstituted LC Polyacetylenes
B. A. San Jose et al., JACS, 2012, 134,

8. Disubstituted LC Polyacetylenes
(CHCl3)
(N*-LC film)

9. Disubstituted LC Polyacetylenes
(right-handed)
(left-handed)

10. PL and Selective Reflection Band

11. Dynamic Switching of CPL
gem = (25 ˚C)
gem = x 10-1 (40 ˚C)

12. Dynamic Switching of CPL
(R)-N*-LC/(S)-PA1
Opposite handedness
gem = (25 ˚C)
gem = x 10-1 (40 ˚C)

13. Conclusion
B. A. San Jose et al.,
Adv. Funct. Mater.,
2014, Early View