Synthesis and Characterization of a Novel Symmetrical Sulfone-Substituted Polyphenylene Vinylene (SO2EH-PPV) for Applications in Light Emitting Devices

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• 作者：Emir Hubijar ; Alexios Papadimitratos ; Doyun Lee ; Anvar Zakhidov ; John P. Ferraris
• 刊名：The Journal of Physical Chemistry B
• 出版年：2013
• 出版时间：April 25, 2013
• 年：2013
• 卷：117
• 期：16
• 页码：4442-4448
• 全文大小：367K
• 年卷期：v.117,no.16(April 25, 2013)
• ISSN：1520-5207

文摘

A novel symmetrical alkylsulfonyl-substituted poly(phenylenevinylene) derivative, poly [2,5-bis-(2鈥?ethylhexylsulfonyl)-1,4-phenylene)vinylene] (SO₂EH-PPV), was synthesized via palladium-catalyzed Stille coupling, and its electronic and optical properties were investigated. The novel PPV derivative was characterized by NMR, UV鈥搗isible absorption, photoluminescence, gel permeation chromatography, infrared spectroscopy, and cyclic voltammetry (CV). The polymer with M_w of 27鈥?00 and a polydispersity index of 2.6 is readily soluble in common organic solvents, such as THF, chloroform, and toluene. The fluorescence quantum yield of the polymer, determined against rhodamine 6G in dilute aqueous solutions, was 0.95. The HOMO and LUMO levels of SO₂EH-PPV were calculated to be 鈭?.0 and 鈭?.61 eV, respectively. The results obtained by CV suggest that SO₂EH-PPV is a strong electron acceptor polymer. Single layer stable polymer light-emitting diode devices with the configuration of (ITO/PEDOT:PSS/SO₂EH-PPV polymer/Al) were fabricated exhibiting a green light emission.