3,4-Ethylenedioxythiophene (EDOT)-based π-conjugated oligomers: Facile synthesis and excited-state properties |
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Authors: | Qiu Dai Yunjing Li Lei Zhai Wenfang Sun |
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Institution: | aNanoScience Technology Center and Department of Chemistry, University of Central Florida, 12424 Research Parkway Suite 400, Orlando, FL 32826, United States;bDepartment of Chemistry and Molecular Biology, North Dakota State University, 258 Dunbar Hall, Fargo, ND 58108-6050, United States |
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Abstract: | A facile synthetic method to produce soluble 3,4-ethylenedioxythiophene (EDOT) oligomers was developed by using iron (III) nitrate nonahydrate as the oxidizing reagent. Two EDOT oligomers, i.e. octomers and octodecamers were obtained as the major products. Their UV–vis absorption, fluorescence at room temperature and 77 K, and triplet transient difference absorption have been measured in CH2Cl2 solutions or glassy solutions. With increased conjugation length from EDOT octomers (A) to EDOT octodecamers (B), the UV–vis absorption, fluorescence and the triplet transient difference absorption band shift to longer wavelength. Both the oligomers also exhibit reasonably high efficiency to generate singlet oxygen. |
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Keywords: | 3 4-Ethylenedioxythiophene (EDOT) oligomer Photophysics Fluorescence Triplet excited-state absorption |
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