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http://dx.doi.org/10.14478/ace.2011.22.4.348

Syntheses and Characterization of Polyurethane Polymers with Versatile Stilbene Chromophores  

Jin, Youngeup (Department of Industrial Chemistry, Pukyong National University)
Noh, Ji Young (Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University)
Park, Seong Soo (Department of Industrial Chemistry, Pukyong National University)
Ju, Changsik (Department of Chemical Engineering, Pukyong National University)
Suh, Hongsuk (Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University)
Publication Information
Applied Chemistry for Engineering / v.22, no.4, 2011 , pp. 348-352 More about this Journal
Abstract
In this research, we have synthesized new pendant-type polyurethane polymers by introducing various chromophores with stilbene derivatives in the side-chain of the polymer backbone. The Stilbene monomers, N,N-bis(2-hydroxyethyl) amino-4'-cyanostilbene, N,N-bis(2-hydroxyethyl)amino-4'-methoxy stilbene, N,N-bis(2-hydroxyethyl)amino-4'-acetylstilbene, and N,N-bis(2-hydroxyethyl) amino stilbene, were synthesized by Wittig reaction. Another stilbene monomer, N,N-bis(2-hydroxyethyl)amino-4'-nitrostilbene, was synthesized by Knoevenagel condensation. By the measurement of UV-Vis absorption and Photoluminescence (PL) spectrum, we found that introduction of the electron-withdrawing group as a substituent shifts both UV-Vis and PL spectra to longer wavelength, and the introduction of the electron-donating group results in blue-shift of the spectrum. In case of polymer with $NO_2$ group as a substituent, PL is quenched.
Keywords
electroluminescence; pendant; polyurethane; organic light emitting diodes;
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