Dendritic and Linear Macromolecular Architectures for Photovoltaics: A Photoinduced Charge Transfer Investigation

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• 作者：Arpornrat Nantalaksakul^† ; ; Astrid Mueller^&#8225 ; ; Akamol Klaikherd^† ; ; Christopher J. Bardeen*^&#8225 ; ; S. Thayumanavan*^† ;
• 刊名：Journal of the American Chemical Society
• 出版年：2009
• 出版时间：February 25, 2009
• 年：2009
• 卷：131
• 期：7
• 页码：2727-2738
• 全文大小：635K
• 年卷期：v.131,no.7(February 25, 2009)
• ISSN：1520-5126

文摘

Dendrimers have been previously shown to provide significant advantages in both excited-state energy transfer and charge transfer. However, this architecture causes one of the charges to be encapsulated and thus not available for charge separation over long distances. We conceived dendron−rod−coils as scaffolds that could have the architectural advantage of the dendrimers, while still providing a possible conduit for charge separation. In this study, we have designed and synthesized dendron−rod−coil-based donor−chromophore−acceptor triads and have compared these with dendron−rod and rod−coil diads. We have then evaluated the relative abilities of these molecules in photoinduced charge transfer. Our studies reveal that dendron−rod−coil could indeed be the ideal architecture for efficient photoinduced charge separation.