Manipulating Association of Electroactive Chromophores via the Use of Peptidic Templates

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• 作者：Onur Y. Kas ; Manoj B. Charati ; Kristi L. Kiick ; Mary E. Galvin
• 刊名：Chemistry of Materials
• 出版年：2006
• 出版时间：September 5, 2006
• 年：2006
• 卷：18
• 期：18
• 页码：4238 - 4245
• 全文大小：350K
• 年卷期：v.18,no.18(September 5, 2006)
• ISSN：1520-5002

文摘

The performance of organic or polymeric devices such as light-emitting diodes, thin-film transistors,and photovoltaic devices depends on the alignment and spacing between electroactive chains, but achievingsuch control on angstrom length scales has proven a significant challenge. It is well-known that Natureexecutes such accurate regulation at a molecular level in proteins and that polypeptidic scaffolds can beused to organize functional groups. We have therefore employed peptidic scaffolds to align multipleelectroactive molecules in desired orientations and spacing to manipulate the electronic behavior of sidechains. The controlled electronic behavior of the hybrid molecules with small changes in architecturewas indicated via photoluminescence, photoluminescence excitation, and ¹H NMR spectroscopy.Methylstilbene molecules form a ground-state complex and excimer when placed approximately 6 Åapart on the same side of a peptide chain, but act independently when placed on opposite sides of thechain or at longer distances. These results prove that peptidic scaffolds can be used to control interactionsand photophysics in electroactive organics, at distances relevant for electroactive devices.