基于吩噻嗪和多环芳烃的高效光诱导室温磷光材料:可调发光颜色和热刺激响应

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中文摘要：光响应室温磷光材料因其广阔的应用前景而受到越来越多的关注.迄今为止,人们仍难以获得兼具高效率和长寿命的磷光材料.蓝光和红光材料的缺乏在很大程度上限制了室温磷光材料的应用.在该工作中,我们报导了一种构筑高效光诱导室温磷光材料的新策略,即通过具有n-π*跃迁的吩噻嗪和以π-π*跃迁主导的多环芳烃相结合,来维持磷光分子的高效率和长寿命.当把这些材料掺杂进聚合物基体中时,由于多环芳烃的π共轭结构变化,我们获得的掺杂体系可以获得红-绿-蓝(RGB)发射色.其中,PTri@PVP的室温磷光性能最好,磷光量子产率为20.73％,寿命长达819毫秒.此外,在停止紫外线照射后,该体系会出现由绿变蓝的随时间变化的磷光余辉,这源于两种不同的分子构象,并可通过热刺激进一步调节.基于这些材料,我们成功实现了其包括丝网印刷、多色图案和多维信息加密在内的多种防伪应用.

外文标题：Efficient photo-induced RTP materials based on phenothiazine and polycyclic aromatic hydrocarbons:Tunable emission color and thermal stimulus response

外文摘要：The development of photo-responsive room temperature phosphorescence(RTP)materials has attracted more and more attention for their broad application pro-spects.Until now,it is still difficult to obtain the related ma-terials with both high efficiency and long lifetime.And the lacking of emission in blue and red regions also largely re-stricts their further applications.In this work,we reported a new strategy to maintain both high efficiency and long lifetime in RTP luminogens through the integration of phenothiazine to facilitate n-π*transition and polycyclic aromatic hydro-carbons(PAHs)dominated by π-π*transition.When they were doped into polymer matrix,full color photo-induced RTP materials were obtained for the changed π-conjugation of PAHs.Among them,PTri@PVP showed the best RTP per-formance with phosphorescence efficiency of 20.73％and lifetime up to 819 ms.Specifically,after turning off the ul-traviolet-visible(UV)irradiation upon this system,time-de-pendent phosphorescence afterglow from green to blue was exhibited,which was found to originate from two distinct molecular conformations and could be further regulated by thermal stimulus.Accordingly,multiple anti-counterfeiting applications,including screen printing,multi-color patterns and multi-dimensional information encryption,were suc-cessfully demonstrated.

外文关键词：

conformationphenothiazine derivativesroom-temperature phosphorescencedual RTP emissions

作者：

梁嘉怡、杨杰、王云生、单鸣达、刘振江、任佳、方曼曼、李振

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作者单位：

Institute of Molecular Aggregation Science,Tianjin University,Tianjin 300072,China

Hubei Key Lab on Organic and Polymeric Opto-Electronic Materials,Department of Chemistry,Wuhan University,Wuhan 430072,China

Joint School of National University of Singapore and Tianjin University,International Campus of Tianjin University,Binhai New City,Fuzhou 350207,China

关键词：

conformation phenothiazine derivatives room-temperature phosphorescence dual RTP emissions

基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of Tianjin CityStarting Grants of Tianjin University and Tianjin GovernmentIndependent Innovation Fund of Tianjin University

项目编号：

522731912223500622JCYBJC007602023XPD-0014

出版年：

2024

DOI：

10.1007/s40843-024-2983-x

中国科学:材料科学(英文)

CSTPCD

ISSN：

年,卷(期)：2024.67(9)