Colorful Room-Temperature Phosphorescence Including White Afterglow from Mechanical Robust Transparent Wood for Time Delay Lighting,Small Structures

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Colorful Room-Temperature Phosphorescence Including White Afterglow from Mechanical Robust Transparent Wood for Time Delay Lighting
Small Structures ( IF 13.9 ) Pub Date : 2024-02-29 , DOI: 10.1002/sstr.202300567
Zequan Lü ₁ , Qian Gao ₁ , Meichao Shi ₁ , Zhenhua Su ₂ , Gegu Chen ₁ , Haisong Qi ₃ , Baozhong Lü ₁ , Feng Peng _{1,

4}

Affiliation

The preparation of mechanical robust organic room-temperature phosphorescence (RTP) materials especially with white afterglow is attractive but rarely reported. Herein, a method to produce mechanical robust colorful RTP transparent wood (PTW) by infiltrating delignified wood with poly (vinyl alcohol) solutions containing arylboronic acids with various π conjugations is reported. The doubly rigid environment provided by the B─O covalent bonds and hydrogen bonds can stabilize the triplet excitons, leading to a ultralong lifetime of up to 2.13 s and excellent RTP emission stability (without obviously quenching over a month) of the target PTW. Besides, as a promising structural material for optical applications, the PTW shows combined advantages of multicolored persistent luminescence (from blue to green and then to red), good optical transmittance (≈90%), and striking mechanical strength (≈154 MPa). More importantly, by introducing appropriate amount of fluorescent dye rhodamine 6 G to the PTW with blue afterglow, white afterglow with a lifetime of 1.85 s is successfully achieve through triplet-to-singlet Förster resonance energy transfer. The PTW can function as afterglow window, anticounterfeiting label, and time delay lighting. This success paves the way for the development of mechanical robust, ecofriendly, and practical RTP materials.

中文翻译：

彩色室温磷光，包括来自机械坚固透明木材的白色余辉，用于延时照明

机械鲁棒的有机室温磷光（RTP）材料的制备，特别是具有白色余辉的材料，很有吸引力，但很少报道。本文报道了一种通过用含有具有各种π共轭的芳基硼酸的聚乙烯醇溶液渗透脱木质素木材来生产机械坚固的彩色RTP透明木材（PTW）的方法。 B─O共价键和氢键提供的双重刚性环境可以稳定三线态激子，从而使目标PTW具有高达2.13 s的超长寿命和优异的RTP发射稳定性（一个月以上没有明显猝灭）。此外，作为一种有前途的光学应用结构材料，PTW显示出多色持久发光（从蓝色到绿色再到红色）、良好的光学透过率（约90％）和惊人的机械强度（约154兆帕）的综合优势。更重要的是，通过在具有蓝色余辉的PTW中引入适量的荧光染料罗丹明6G，通过三线态到单线态Förster共振能量转移，成功实现了寿命为1.85秒的白色余辉。 PTW可用作余辉窗、防伪标签和延时照明。这一成功为机械坚固、环保且实用的 RTP 材料的开发铺平了道路。

更新日期：2024-02-29

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