Chinese Journal of Quantum Electronics, Volume. 24, Issue 6, 748(2007)
Origin of the blue emissions of polyacetylenes bearing carbazole side groups
The optical properties and electronic structures of one mono-substituted polyacetylene and two di-substituted polyacetylenes have been investigated. Each of the substituted polyacetylenes bears a carbazole unit in the side chain. In spite of the differences in their molecular structures,the dilute solutions(~1 × 10-6 M)of these substituted polyacetylenes exhibit the same absorptions and the same deep-blue emissions(~360 nm). Interestingly,the absorption and emission spectra of these substituted polyacetylenes are similar to those of the small molecule carbazole. As the concentration of the substituted polyacetylenes increases to about 1 × 10-3 M,we have detected intense blue emissions at about 475 nm. Using Huckel tight binding programs,we have calculated the electronic structures of the carbazole-containing polyacetylenes. Our results indicate that the absorption,the deep-blue emission(~360 nm)and the intense blue emission(~475 nm)originate from the carbazole chromophores in the side chain.
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XUE Qing, HUANG Yuan-ming. Origin of the blue emissions of polyacetylenes bearing carbazole side groups[J]. Chinese Journal of Quantum Electronics, 2007, 24(6): 748
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Received: Mar. 22, 2007
Accepted: --
Published Online: Jun. 7, 2010
The Author Email: Qing XUE (xueqing232@126.com)
CSTR:32186.14.