Phenothiazine-S,S-dioxide- and fluorene-based light-emitting polymers: Introduction of e(-)-deficient S,S-dioxide into e(-)-rich phenothiazine
- Authors
- Lee, Jonghee; Lee, Jeong-Ik; Park, Moo-Jin; Jung, Young Kwan; Cho, Nam Sung; Cho, Hoon Je; Hwang, Do-Hoon; Lee, Sang-Kyu; Park, Jong-Hwa; Hong, Jiwon; Chu, Hye Yong; Shim, Hong-Ku
- Issue Date
- 1-Apr-2007
- Publisher
- JOHN WILEY & SONS INC
- Keywords
- electron affinity; fluorescence; light-emitting diodes (LED); luminescence; phenothiazine-S,S-dioxide
- Citation
- JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, v.45, no.7, pp 1236 - 1246
- Pages
- 11
- Journal Title
- JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
- Volume
- 45
- Number
- 7
- Start Page
- 1236
- End Page
- 1246
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/27213
- DOI
- 10.1002/pola.21890
- ISSN
- 0887-624X
1099-0518
- Abstract
- A novel series of poly(10-hexyl-phenothiazine-S,S-dioxide-3,7-diyl) and poly(9,9'-dioetyl-fluorene-2,7-diyl-alt-10-hexyl-3,7-phenothiazine-S,S-dioxide) (PFPTZSS) compounds were synthesized through Ni(0)-mediated Yamamoto polymerization and Pd(II)-catalyzed Suzuki polymerization. The synthesized polymers were characterized by H-1 NMR spectroscopy and elemental analysis and showed higher glass transition temperatures than that of pristine polyfluorene. In terms of photoluminescence (PL), the PFPTZ-SS compounds were highly fluorescent with bright blue emissions in the solid state. Light-emitting devices were fabricated with these polymers in an indium tin oxide/poly(3,4-ethylene dioxythiophene):poly(styrene sulfonate)/ polymer/Ca/Al configuration. The electroluminescence (EL) of the copolymers differed from the PL characteristics: the EL device exhibited a redshifted greenish-blue emission in contrast to the blue emission observed in the PL. Additionally, this unique phenothiazine-S,S-dioxide property, triggered by the introduction of an electron-deficient SO2 unit into the electron-rich phenothiazine, gave rise to improvements in the brightness, maximum luminescence intensity, and quantum efficiency of the EL devices fabricated with PFPTZ-SS. (c) 2007 Wiley Periodicals, Inc.
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