Pure organic materials with ultralong room-temperature phosphorescence(RTP)and persistent luminescence in broad color gamut exhibit tremendous potential and broad application prospects due to their unique optical prop...Pure organic materials with ultralong room-temperature phosphorescence(RTP)and persistent luminescence in broad color gamut exhibit tremendous potential and broad application prospects due to their unique optical properties.This article proposes a simple strategy,polyatomic synergistic effect,to endow persistent luminescent materials with ultralong lifetime and broad color-tunability through polyatomic synergistic effect and non-traditional phosphorescence resonance energy transfer(PRET).By leveraging the polyatomic synergistic effect to enhance the intersystem crossing(ISC)in bibenzimidazole(BBI)derivatives and suppress the non-radiative transition process,ultralong persistent room-temperature phosphorescence has been successfully achieved after incorporating BBI-Cl-M into poly(methyl methacrylate)(PMMA)to form a rigid matrix(BBI-Cl-M@PMMA).Specifically,the ester functionalized bibenzimidazole with modified chlorine on molecular skeleton(BBI-Cl-M)demonstrates a remarkable phosphorescent lifetime(τp)of up to 256.4 ms.In addition,the behaviors and mechanism of RTP via polyatomic synergistic effect have been further understood by theoretical calculation and single crystal analysis.Subsequently,utilizing BBI-Cl-M as the energy donor and Rhodamine B(RB)as the energy acceptor,persistent and multicolor organic afterglow covering from green to red has been realized successfully by simply regulating the doping composition and concentration of PRET systems.These RTP materials have also been applied in underwater afterglow emission and multilevel anti-counterfeiting technology successfully.展开更多
Comprehensive Summary:In recent years,the study of the photochromic behavior of phenothiazine derivatives has not only enriched the variety of color-changing materials but also provided new donor molecules for the con...Comprehensive Summary:In recent years,the study of the photochromic behavior of phenothiazine derivatives has not only enriched the variety of color-changing materials but also provided new donor molecules for the construction of Förster Resonance Energy Transfer(FRET).This advancement broadens the application potential of photochromic materials and offers fresh perspective for FRET research.Herein,pillar[5]arene-linked biphenothiazine derivative(DPP5)was synthesized,while p-dibenzyl-linked biphenothiazine derivative(DPDB)and butyl-linked biphenothiazine derivative(DPB)were designed for comparative study.The photochromic behavior was demonstrated by UV-vis spectra,electron paramagnetic resonance(EPR)and chemical oxidation method,showing the transformation of DPP5 molecule into the radical cation DPP5•+and subsequently into the dication DPP52+.Furthermore,a FRET system was constructed using dication species DPP52+as the energy donor and Nile red(NiR)as the energy acceptor.The introduction of vip molecules,1,6-dibromohexane(1,6-DBH)and 1,10-dibromodecane(1,10-DBD),into the above FRET system enhanced the energy transfer efficiency by increasing the aggregation degree of FRET system by utilizing the cavity of pillar[5]arene through host-vip interaction.The application of the photochromic behavior of phenothiazine derivatives into FRET system,along with the strategy of using vip molecule to enhance FRET properties,will contribute to the development of novel photochromic materials.展开更多
基金supported by the National Natural Science Foundation of China(NSFC,Nos.22061039,22165027)the Top Leading Talents Project of Gansu Province,the Key R&D program of Gansu Province(No.21YF5GA066)+1 种基金Gansu Province College Industry Support Plan Project(No.2022CYZC-18)Northwest Normal University 2023 graduate research funding project(No.2023KYZZS154)。
文摘Pure organic materials with ultralong room-temperature phosphorescence(RTP)and persistent luminescence in broad color gamut exhibit tremendous potential and broad application prospects due to their unique optical properties.This article proposes a simple strategy,polyatomic synergistic effect,to endow persistent luminescent materials with ultralong lifetime and broad color-tunability through polyatomic synergistic effect and non-traditional phosphorescence resonance energy transfer(PRET).By leveraging the polyatomic synergistic effect to enhance the intersystem crossing(ISC)in bibenzimidazole(BBI)derivatives and suppress the non-radiative transition process,ultralong persistent room-temperature phosphorescence has been successfully achieved after incorporating BBI-Cl-M into poly(methyl methacrylate)(PMMA)to form a rigid matrix(BBI-Cl-M@PMMA).Specifically,the ester functionalized bibenzimidazole with modified chlorine on molecular skeleton(BBI-Cl-M)demonstrates a remarkable phosphorescent lifetime(τp)of up to 256.4 ms.In addition,the behaviors and mechanism of RTP via polyatomic synergistic effect have been further understood by theoretical calculation and single crystal analysis.Subsequently,utilizing BBI-Cl-M as the energy donor and Rhodamine B(RB)as the energy acceptor,persistent and multicolor organic afterglow covering from green to red has been realized successfully by simply regulating the doping composition and concentration of PRET systems.These RTP materials have also been applied in underwater afterglow emission and multilevel anti-counterfeiting technology successfully.
基金supported by the National Natural Science Foundation of China(NSFC)(Nos.22061039,22165027)the Top Leading Talents Project of Gansu Province,the Key R&D Program of Gansu Province(21YF5GA066)Gansu Province College Industry Support Plan Project(No.2022CYZC-18)。
文摘Comprehensive Summary:In recent years,the study of the photochromic behavior of phenothiazine derivatives has not only enriched the variety of color-changing materials but also provided new donor molecules for the construction of Förster Resonance Energy Transfer(FRET).This advancement broadens the application potential of photochromic materials and offers fresh perspective for FRET research.Herein,pillar[5]arene-linked biphenothiazine derivative(DPP5)was synthesized,while p-dibenzyl-linked biphenothiazine derivative(DPDB)and butyl-linked biphenothiazine derivative(DPB)were designed for comparative study.The photochromic behavior was demonstrated by UV-vis spectra,electron paramagnetic resonance(EPR)and chemical oxidation method,showing the transformation of DPP5 molecule into the radical cation DPP5•+and subsequently into the dication DPP52+.Furthermore,a FRET system was constructed using dication species DPP52+as the energy donor and Nile red(NiR)as the energy acceptor.The introduction of vip molecules,1,6-dibromohexane(1,6-DBH)and 1,10-dibromodecane(1,10-DBD),into the above FRET system enhanced the energy transfer efficiency by increasing the aggregation degree of FRET system by utilizing the cavity of pillar[5]arene through host-vip interaction.The application of the photochromic behavior of phenothiazine derivatives into FRET system,along with the strategy of using vip molecule to enhance FRET properties,will contribute to the development of novel photochromic materials.
