Hydrogen-Bonded Supramolecular Network Triggers High-Efficiency Blue Room-Temperature Phosphorescence  

作　　者：Sen Wu Tao Wang Eli Zysman-Colman 

机构地区：[1]Organic Semiconductor Centre,EaStCHEM School of Chemistry,University of St Andrews,St Andrews,Fife KY169ST [2]School of Materials Science&Engineering,Beijing Institute of Technology,Beijing 100081

出　　处：《CCS Chemistry》2024年第11期2727-2740,共14页中国化学会会刊（英文）

基　　金：S.W.thanks the China Scholarship Council(grant no.201906250199)for support;funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No.897098(AIERTP-PLED);support from the Marie Skłodowska-Curie Individual Fellowship;We also thank the United Kingdom’s Engineering and Physical Sciences Research Council for support(grant no.EP/W007517/1).

摘　　要：Hydrogen bonding has been employed to suppressnonradiative decay in organic compounds that showroom-temperature phosphorescence (RTP);however, the small number of structurally diverse examplesmakes it unclear how general this strategy is to turnon RTP. In this study, we report highly efficient blueRTP from 4,4′,4′′-nitrilotribenzoic acid (TPA-CO_(2)H)in five structurally and chemically distinct hydrogenbonded supramolecular networks. In doped films inpoly(vinyl alcohol) (PVA), the phosphorescencequantum yield and lifetime (ΦPh and τPh) reach 52%and 275 ms. Boric acid can also be used to turn onRTP, and the performance changes significantlywhen the sample is heated beyond the dehydrationtemperature of this host where there is a 14-foldenhancement in the ΦPh after heat treatment. BlueRTP similar to that observed in PVA was also observed using granulated sugar, gelatine, and paper ashost matrices. This work elucidates for the first timethe role and the generality of hydrogen bonding inactivating efficient blue RTP and examines how thechoice of hydrogen bonding host influences RTPperformance. We further demonstrate how the emission color can be tuned by codoping the films withRhodamine 6G.

关 键 词：room-temperature phosphorescence blue phosphorescence 4 4′ 4′′-nitrilotribenzoic acid hydrogen bonding supramolecular networks 

分 类 号：TB34[一般工业技术—材料科学与工程]