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Electrogenerated chemiluminescence of N,N-dimethylamino functionalized tetrakis(phenylethynyl)pyrenes
- Issue Date
- 22-7월-2013
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Tetrakis(phenylethynyl)pyrene; Substitution N,N-dimethylamino group; Radical stability; Intramolecular charge transfer (ICT)
- Citation
- TETRAHEDRON, v.69, no.29, pp.5908 - 5912
- Indexed
- SCIE
SCOPUS
- Journal Title
- TETRAHEDRON
- Volume
- 69
- Number
- 29
- Start Page
- 5908
- End Page
- 5912
- ISSN
- 0040-4020
- Abstract
- The synthesis of star-shaped molecules, comprising a pyrene core with tetrakis(phenylethynyl) arms substituted with N,N-dimethylamino and propyl groups (1-5), is reported. The electrochemical and photophysical properties of 1-5 depend on the number of N,N-dimethylamino groups on the tetrakis(phenylethynyl)pyrene framework. In electrogenerated chemiluminescence (ECL) studies, the spectra of 4 and 5 show red-shifts and band broadening; in contrast, 1 exhibits a typical high-intensity pyrene ECL emission. It was confirmed that the ECL spectra arise from the intramolecular charge transfer (ICT) induced by the annihilation of radical ions owing to the presence of a strong donor. (C) 2013 Elsevier Ltd. All rights reserved.
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