Hydrogen-bond organized 2D metal–organic microsheets:direct ultralong phosphorescence and color-tunable optical waveguides  

氢键网络构筑二维金属有机微片:直接超长磷光和颜色可调光波导

作　　者：Shuya Liu Yuhang Lin Dongpeng Yan 刘书雅;林钰航;闫东鹏(Beijing Key Laboratory of Energy Conversion and Storage Materials,College of Chemistry,Key Laboratory of Radiopharmaceuticals,Ministry of Education,Beijing Normal University,Beijing100875,China)

机构地区：[1]Beijing Key Laboratory of Energy Conversion and Storage Materials,College of Chemistry,Key Laboratory of Radiopharmaceuticals,Ministry of Education,Beijing Normal University,Beijing100875,China

出　　处：《Science Bulletin》2022年第20期2076-2084,M0004,共10页科学通报（英文版）

基　　金：supported by the Beijing Municipal Natural Science Foundation(JQ20003);the National Natural Science Foundation of China(21771021,21822501,and 22061130206);the Fok Ying-Tong Education Foundation(171008);the Measurements Fund of Beijing Normal University;the State Key Laboratory of Heavy Oil Processing;。

摘　　要：Ultralong phosphorescent materials have numerous applications across biological imaging, lightemitting devices, X-ray detection and anti-counterfeiting. Triplet-state molecular phosphorescence typically accompanies the singlet-state fluorescence during photoluminescence, and it is still difficult to achieve direct triplet photoemission as ultralong room temperature phosphorescence(RTP). Here, we have designed Zn-IMDC(IMDC, 4,5-imidazoledicarboxylic acid) and Cd-IMDC, two-dimensional(2D)hydrogen-bond organized metal–organic crystalline microsheets that exhibit rarely direct ultralong RTP upon UV excitation, benefiting from the appropriate heavy-atom effect and multiple triplet energy levels. The excitation-dependent and thermally stimulated ultralong phosphorescence endow the metal–organic systems great opportunities for information safety application and temperature-gated afterglow emission. The well-defined 2D microsheets present color-tunable and anisotropic optical waveguides under different excitation and temperature conditions, providing an effective way to obtain intelligent RTP-based photonic systems at the micro-and nano-scales.超长磷光材料在生物成像、发光器件、X射线检测和防伪等领域具有广泛的应用.光致发光过程中,分子体系通常以单重态荧光为主,难以实现直接超长室温磷光(RTP).本文基于重原子效应和多重三重态能级,设计了Zn-IMDC和Cd-IMDC两种二维氢键网络构筑的金属有机晶体微片.在紫外激发下,二维微米片材料表现出少有的直接超长室温RTP.材料所具备的激发依赖性和热激发的超长磷光,赋予金属有机体系信息安全应用和温度门控余辉发射的性能.二维微米片在不同的激发和温度条件下呈现颜色可调和各向异性的光波导,为其在微纳尺度获得基于RTP的智能光子系统提供了一种有效的方法.

关 键 词：Room temperature phosphorescence Optical waveguide Information encryption Metal-organic complexes 2D microsheets 

分 类 号：TB34[一般工业技术—材料科学与工程]