Versatile Room-Temperature-Phosphorescent Materials Prepared from N-Substituted Naphthalimides: Emission Enhancement and Chemical Conjugation
Versatile Room-Temperature-Phosphorescent Materials Prepared from N-Substituted Naphthalimides: Emission Enhancement and Chemical Conjugation
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由 N-取代萘酰亚胺制备的多功能室温磷光材料：发射增强和化学共轭
DOI：
10.1002/anie.201601252
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发表时间：
2016-08-16
影响因子：
16.6
通讯作者：
Zhang, Guoqing
中科院分区：
文献类型：
--
作者：
Chen, Xiaofeng;Xu, Cheng;Zhang, Guoqing
具有室温磷光（RTP）的纯有机材料由于其在传感、成像和显示方面的潜在应用，目前正受到广泛的研究。受某些有机金属系统的启发，其中配体定位磷光（(3)pi-pi*）是由配体到金属或金属到配体的电荷转移（CT）状态介导的，我们现在表明，来自同一有机分子的供体到受体的CT状态也可以介导pi定位的RTP。在n -取代萘酰亚胺（NNIs）模型体系中，当用电子给体对NNI进行化学修饰时，芳烃环在NNI定域的1 pi-pi*和(3)pi-pi*态之间较大的能隙可以被分子内CT态桥接。这些基于nni的RTP材料可以很容易地共轭到合成和天然大分子上，可以用于RTP显微镜。
Purely organic materials with room-temperature phosphorescence (RTP) are currently under intense investigation because of their potential applications in sensing, imaging, and displaying. Inspired by certain organometallic systems, where ligand-localized phosphorescence ((3)pi-pi*) is mediated by ligand-to-metal or metal-to-ligand charge transfer (CT) states, we now show that donor-to-acceptor CT states from the same organic molecule can also mediate pi-localized RTP. In the model system of N-substituted naphthalimides (NNIs), the relatively large energy gap between the NNI-localized 1 pi-pi* and (3)pi-pi* states of the aromatic ring can be bridged by intramolecular CT states when the NNI is chemically modified with an electron donor. These NNI-based RTP materials can be easily conjugated to both synthetic and natural macromolecules, which can be used for RTP microscopy.