Steady-state and time-resolved fluorescence analysis for a cyanobiphenyl mesogen in polymer-dispersed liquid crystal films

Journal of Physical Chemistry B

Volumn 104, Issue 12, 2000, Pages 2642-2646

  Kato, Shinji ^a   Chen, Feng Qi ^a   Shimada, Tetsuya ^b   Yatsuhashi, Tomoyuki ^b,c   Inoue, Haruo ^b   Pac, Chyongjin ^a  

^a KAWAMURA INSTITUTE OF CHEMICAL RESEARCH   (Japan)

^b TOKYO METROPOLITAN UNIVERSITY   (Japan)

^c Osaka Prefecture University   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0000805635     PISSN: 15206106     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp993702n     Document Type: Article

References (30)

1. (a) Doane, J. W.; Vaz, N. A.; Wu, B.-G.; Zumer, S. Appl. Phys. Lett. 1986,48,269.
2. (b) Doane, J. W.; Golemme, A.; West, J. L.; Whitehead, J. B., Jr.; Wu, B.-G. Mol. Cryst. Liq. Cryst. 1988, 765, 511.
3. Coates, D. J. Mater. Chem. 1995, 5, 2063.
4. Bouteiller, L.; LeBamy, P. Liq. Cryst. 1996, 27, 157, and references therein.
5. (a) Vaz, N. A.; Smith, G. W.; Montgomery, G. P. Mol. Cryst. Liq. Cryst. 1987,146,1.
6. (b) Kirn, J. Y.; Cho, C. H.; Palffy-Muhoray, P.; Mustafa, M.; Kyu, T. Phys. Rev. Lett. 1993, 71, 2232.
7. Russell, G. M.; Paterson, B. J. A.; Imrie, C. T.; Heeks, S. K. Chem. Mater. 1995, 7,2185.
8. Rajaram, C. V.; Hudson, S. D.; Chien, L. C. Chem. Mater. 1995, 7, 2300.
9. Kato, S.; Lee, B.; Pac, C. Liq. Cryst. 1997, 22, 595.
10. (a) Lok, B. K.; Cheng, Y.-L.; Robertson, C. R. J. Colloid Interface Sci. 1983, 91, 87.
11. (b) Masuhara, H.; Tazuke, S.; Tamai, N.; Yamazaki, I. J. Phys. Chem. 1986, 90, 5830.
12. Itaya, A.; Yamada, T.; Tokuda, K.; Masuhara, H. Polym. J. 1990, 22, 697.
13. Rumbles, G.; Brown, A. J.; Phillips, D. J. Chem. Soc., Faraday Trans. 1991, 87, 825.
14. For recent reviews see: (a) Jérôme, B. Rep. Prog. Phys. 1991,54, 391.
15. (b) Abbott, N. L. Curr. Opin. Colloid Interface Sci. 1997, 2, 76.
16. David, C.; Baeyens-Volant, D. Mol. Cryst. Liq. Cryst. 1980, 59, 181.
17. Ikeda, T.; Kurihara, S.; Tazuke, S. J. Phys. Chem. 1990, 94, 6550.
18. No significant shifting of the maximum wavelength of the fluorescence spectra was observed as the excitation wavelength varied. These results apparently indicate that the spectral distributions of the fluorescence mostly depend on the relative contribution of the monomer and excimer emissions of 5CB. The participation of possible preformed aggregates which would absorb and emit should be negligible even in such condensed media in this work.
19. 3
20. 3 Presumably, possible optical effects on the fluorescence are spatially randomized and canceled to be negligible in spectral distributions of the fluorescence for the PDLC films.
21. It was confirmed that the photopolymerized films prepared from the diacrylate and Irgacure 184 in the absence of 5CB show little fluorescence upon excitation at 275-320 nm. It is therefore indicated that Irgacure 184 and its benzoyl fragments virtually exerted no effect on the observed fluorescence spectra of the PDLC films. This is in line with the well-known fact that aromatic ketones generally reveal no or only negligibly weak fluorescence from the excited-singlet n,π* state.
22. (a) Serbutoviez, C.; Kloosterboer, J. G.; Boots, H. M. J.; Touwslager, F. J. Macromolecules 1996, 29, 7690.
23. (b) Serbutoviez, C.; Kloosterboer, J. G.; Boots, H. M. J.; Paulissen, F. A. M. A.; Touwslager, F. J. Liq. Cryst. 1997, 22, 145.
24. Miyajima, M,; Anazawa, T. RadTech Asia 1997, Proceedings p 76 (S3-2).
25. Markovitsi, D.; Ide, J. P. J. Chim. Phys. 1986, 83, 97.
26. Klock, A. M.; Rettig, W.; Hofkens, J.; van Damme, M.; DeSchryver, F. C. J. Photochem. Photobiol. A: Chem. 1995, 85, 11.
27. (a) Subramanian, R.; Patterson, L. K.; Levanon, H. Chem. Phys. Lett. 1982, 93, 578.
28. (b) David, C.; Baeyens-Volant, D. Mol. Cryst. Liq. Cryst. 1984, 700, 45.
29. Tamai, N.; Yamazaki, I.; Masuhara, H.; Malaga, N. Chem. Phys. Lett. 1984, 104, 485.
30. Jaffrain, M.; Lacrampe, G.; Martin, G. J. Physique Lett. 1984, 45, L-1103.