Linearly polarized white fluorescence from shish-kebab type liquid crystalline poly(P-phenylenevinvlene)s with (P-phenylene)s as kebab |
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Authors: | Kun Zhao Jin-tao Wang Cheng-zi Wang Kai Li Shi-jun Zheng Kun Wang Takaomi Kobayashi |
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Institution: | (1) Department of Chemistry, H. B. Technological Institute, Kanpur, 208002, India; |
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Abstract: | Liquid crystalline (LC) polymers with a shish-kebab-type moiety on their cross-conjugated (p-phenylene)s-poly(pphenylenevinylene) s main chains were synthesized through Gilch polymerization in order to develop a kind of polymers available
for linearly polarized white-light-emitting from single chain. In this system, the 2,5-bis(4′-alkoxyphenyl)benzene as the
“kebabs” connects with poly(p-phenylenevinylene) (PPV) main chain backbone using its molecular gravity center and the PPV as the “shish” or “skewer” (the
“shish-kebab”). The polymers possess desirable properties such as excellent solubility and liquid crystalline properties.
To drop the “kebabs” of the 2,5-bis(4′-alkoxyphenyl)benzene into the orientation microgroove of aligned polyimide film, not
only the “shish” of polymer main chain can be aligned by the virtue of orientation of “kebabs” but also the uniform cross-conjugated
structure between the “kebabs” and “shish” can be broken. Then, the alignment of the polymer main chain showed yellow light
emission and was also accompanied by orientation of the LC side chains showing blue light emission, this gave rise to a notable
linearly polarized white fluorescence. |
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Keywords: | Liquid crystalline conjugated polymer Shish-kebab Single chain white-light-emitting Linearly polarized white fluorescence |
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