Nonconventional luminophores with unprecedented efficiencies and color-tunable afterglows,Materials Horizons

当前位置： X-MOL 学术 › Mater. Horiz. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Nonconventional luminophores with unprecedented efficiencies and color-tunable afterglows
Materials Horizons ( IF 12.2 ) Pub Date : 2020-05-19 , DOI: 10.1039/d0mh00688b
Yunzhong Wang _{1,

2,

3,

4,

5} , Saixing Tang _{1,

2,

3,

4,

5} , Yating Wen _{6,

7,

8,

9,

10} , Shuyuan Zheng _{1,

2,

3,

4,

5} , Bing Yang _{6,

7,

8,

9,

10} , Wang Zhang Yuan _{1,

2,

3,

4,

5}

Affiliation

Nonconventional luminophores without significant conjugations generally possess excitation-dependent photoluminescence (PL) owing to the coexistence of diverse clustered chromophores, which strongly implies the possibility of achieving color-tunable PL and/or persistent room temperature phosphorescence (p-RTP) from their crystals assisted by effective intermolecular interactions. Compared with traditional luminogens, however, nonconventional luminophores generally suffer from poor PL efficiencies. Here, inspired by the highly stable double-helix structure and multiple hydrogen bonds in DNA, we report a series of planar or twisted nonconventional luminophores based on hydantoin (HA), demonstrating unprecedentedly high PL/p-RTP efficiencies and p-RTP lifetimes of up to 87.5%/21.8% and 1.74 s, respectively, accompanying color-tunable p-RTP from sky-blue to yellowish-green. These findings will advance the exploitation of efficient nonconventional luminophores and provide deeper mechanistic insights into the origin of color-tunable p-RTP.

中文翻译：

非常规的发光体，具有空前的效率和余辉可调的余辉

由于各种簇生色团的共存，没有显着共轭的非常规发光体通常具有依赖于激发的光致发光（PL），这强烈暗示有可能通过其辅助晶体获得颜色可调的PL和/或持久的室温磷光（p-RTP）。通过有效的分子间相互作用。但是，与传统的发光剂相比，非常规的发光体通常具有较差的PL效率。在这里，受DNA中高度稳定的双螺旋结构和多个氢键的启发，我们报道了一系列基于乙内酰脲（HA）的平面或扭曲的非常规发光体，证明了PL / p-RTP效率和p-RTP寿命前所未有地高。分别高达87.5％/ 21.8％和1.74 s，随附的颜色可调p-RTP，从天蓝色到黄绿色。这些发现将促进有效的非常规发光体的开发，并提供对颜色可调p-RTP起源的更深入的机械见解。

更新日期：2020-05-19

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11