高光稳定性的全稠环分子在近红外安全和防伪中的应用  

All-fused-ring molecules with high photostability for near-infrared security and anti-counterfeiting applications

作　　者：廖子轩 苗俊辉 刘俊 王利祥 Zixuan Liao;Junhui Miao;Jun Liu;Lixiang Wang(State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China;School of Applied Chemistry and Engineering,University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China [2]School of Applied Chemistry and Engineering,University of Science and Technology of China,Hefei 230026,China

出　　处：《Science China Materials》2023年第10期4037-4045,共9页中国科学（材料科学（英文版）

基　　金：financially supported by the National Key Research and Development Program of China(2019YFA0705900)funded by the Ministry of Science and Technology(MOST);the National Natural Science Foundation of China(52073281,22135007 and 21875244);the Natural Science Foundation of Jilin Province(20230101122JC)。

摘　　要：可见光与近红外(NIR)光的分离在近红外相关领域中有重要意义.选择性地从环境中提取近红外光的可见光不透明-近红外透明(VONIRT)材料在许多领域都有着广泛的应用.VONIRT材料通常是无机材料,通常存在脆性、毒性或者制备成本高的缺点.经典有机分子由于其吸收光谱不够宽,不能覆盖到全部可见光区域,不能作为VONIRT材料使用.在本工作中,我们报道了具有ADA’DA构型的全稠环分子,将其作为VONIRT材料应用于近红外安全与防伪中.通过对分子的分子内电荷转移进行调节,这类分子实现了400到800 nm的宽吸收光谱,半峰宽为299 nm.此外,由于它们的全稠环骨架,这些分子表现出优异的光稳定性.将优化后的全稠环分子与高分子基底共混,成功制备了VONIRT滤光片.该滤光片可以选择性地阻挡可见光以及透过近红外光.该滤光片不仅可以选择性提取环境中的近红外光,也能在近红外相关的实际场景(近红外安全、法医学以及防伪等)中使用.本工作揭示了全稠环分子的一种新的光学性质,并且提供了一类新型的、实用的VONIRT材料.Separation of visible light and near-infrared(NIR)light is important for NIR-related applications.Visible opaque and NIR transmitting(VONIRT)materials,which selectively extract NIR light from ambient environment,are widely used in many fields.VONIRT materials are always inorganic compounds,which suffer from brittleness,toxicity or high fabrication cost.Typical organic molecules cannot be used as VONIRT materials because their absorption spectra are not wide enough to cover the whole visible region.In this work,we report all-fused-ring molecules with electron ADA’DA configuration for VONIRT material applications.By regulating the intramolecular charge transfer effect of the molecules,wide absorption spectra spanning from 400 to 800 nm with the full width at half maximum of 299 nm are realized.Moreover,these molecules exhibit excellent photostability because of their all-fused-ring skeletons.A VONIRT optical filter is fabricated by dispersing the optimized allfused-ring molecule in a polymer matrix.It selectively blocks all the visible light and allows the NIR light to be transmitted with a transmittance of more than 80%.This filter can not only selectively extract NIR signals from complex environments,but also be used in a variety of real NIR-related scenarios,including NIR security,forensic sciences and anticounterfeiting.This work indicates a new optical property of all-fused-ring molecules and provides a new kind of useful VONIRT materials.

关 键 词：all-fused-ring molecules full spectrum absorption of visible light near-infrared optical filter intramolecular charge transfer near-infrared photography 

分 类 号：TB481[一般工业技术—包装工程] TN219[电子电信—物理电子学]