A White-Light-Emitting Molecule: Frustrated Energy Transfer between Constituent Emitting Centers

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• 作者：Sanghyuk Park ; Ji Eon Kwon ; Se Hun Kim ; Jangwon Seo ; Kyeongwoon Chung ; Sun-Young Park ; Du-Jeon Jang ; Begoa Milin Medina ; Johannes Gierschner ; Soo Young Park
• 刊名：Journal of the American Chemical Society
• 出版年：2009
• 出版时间：October 7, 2009
• 年：2009
• 卷：131
• 期：39
• 页码：14043-14049
• 全文大小：368K
• 年卷期：v.131,no.39(October 7, 2009)
• ISSN：1520-5126

文摘

White-light-emitting single molecules are promising materials for use in a new generation of displays and light sources because they offer the possibility of simple fabrication with perfect color reproducibility and stability. To realize white-light emission at the molecular scale, thereby eliminating the detrimental concentration- or environment-dependent energy transfer problem in conventional fluorescent or phosphorescent systems, energy transfer between a larger band-gap donor and a smaller band-gap acceptor must be fundamentally blocked. Here, we present the first example of a concentration-independent ultimate white-light-emitting molecule based on excited-state intramolecular proton transfer materials. Our molecule is composed of covalently linked blue- and orange-light-emitting moieties between which energy transfer is entirely frustrated, leading to the production of reproducible, stable white photo- and electroluminescence.