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Efficient tunable visible and near-infrared emission in Sb^(3+)/Sm^(3+)-codoped Cs_(2)NaLuCl_6 for near-infrared light-emitting diode,triple-mode fluorescence anti-counterfeiting and information encryption

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Chinese Chemical Letters 2024年第11期35卷 571-576页

作者： Hui Peng Xiao Wang Weiguo Huang Shuiyue Yu Linghang Kong Qilin Wei Jialong Zhao Bingsuo Zou State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materialsand School of ResourcesEnvironment and MaterialsGuangxi UniversityNanning 530004China School of Chemistry and Chemical Engineering Shandong UniversityJi'nan 250100China

Rare earth ions(RE^(3+))-doped double perovskites have attracted tremendous attention for its fascinating optical ***,RE^(3+)generally exhibits poor photoluminescence quantum yield(PLQY)for their parity-forbidden 4f-4f transition and the low doping ***,we reported Sb^(3+)/Sm^(3+)-codoped rare earth-based double perovskite Cs_(2)Na Lu Cl_(6)that enables efficient visible and nearinfrared(NIR)emission,which stems from self-trapped exciton(STE)and Sm^(3+),*** from up to 72.89%energy transfer efficiency from STE to Sm^(3+)and high doping concentrations due to similar ionic activity between Sm^(3+)and Lu^(3+),thus eruptive PLQY of 74.58%in the visible light region and 23.12%in the NIR light region can be ***,Sb^(3+)/Sm^(3+)-codoped Cs_(2)Na Lu Cl_(6)exhibits tunable emission characteristic in the visible light region under different excitation wavelengths,which can change from blue emission(254 nm excitation)to white emission(365 nm excitation).More particularly,only the NIR emission can be captured by the NIR camera when a 700 nm cutoff filter is *** excellent stability and unique optical properties of Sb^(3+)/Sm^(3+)-codoped Cs_(2)Na Lu Cl_(6)enable us to demonstrate its applications in NIR light-emitting diode,triple-mode fluorescence anti-counterfeiting and information *** findings provide new inspiration for the application of rare earth-based double perovskite in optoelectronic devices.

关键词： Rare earth-based double perovskites Self-trapped exciton near-infrared emission Energy transfer Multifunctional applications

Donor-Acceptor Typed AIE Luminogens with near-infrared emission for Super-resolution Imaging

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Chemical Research in Chinese Universities 2021年第1期37卷 143-149页

作者： SHEN Qifei XU Ruohan WANG Zhi ZHAO Tianyu ZHOU Yu XU Yanzi YANG Zhiwei LEI Ming MENG Lingjie DANG Dongfeng School of Chemistry Xi’an Key Laboratory of Sustainable Energy Material ChemistryMOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed MatterXi’an Jiao Tong UniversityXi’an710049P.R.China School of Physics MOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed MatterXi’an Jiao Tong UniversityXi’an710049P.R.China Instrumental Analysis Center Xi’an Jiao Tong UniversityXi’an710049P.R.China

Aggregation-induced emission(AIE)luminogens(AIEgens)with high brightness in aggregates exhibit great potentials in biological imaging,but these AIEgens are seldom applied in super-resolution biological imaging,especially in the imaging by using the structural illumination microscope(SIM).Based on this consideration,we synthesized the donor-acceptor typed AIEgen of DTPA-BTN,which not only owns high brightness in the near-infrared(NIR)emission region from 600 nm to 1000 nm(photoluminescence quantum yield,PLQYs=11.35%),but also displays excellent *** addition,AIE nanoparticles based on 4,7-ditriphenylamine-[1,2,5]-thiadiazolo[3,4-c]pyridine(DTPA-BTN)were also prepared with highly emissive features and excellent ***,the developed DTPA-BTN-based AIE nanoparticles were applied in the super-resolution cellular imaging via SIM,where much smaller full width at half-maximum values and high signal to noise ratios were obtained,indicating the superior imaging *** results here imply that highly emissive AIEgens or AIE nanoparticles can be promising imaging agents for super-resolution imaging via SIM.

关键词： Aggregation-induced emission(AIE) Super-resolution imaging Structural illumination microscope near-infrared emission Biological imaging

π-Bridge mediated coupling between inter-and intra-molecular charge transfer in aggregates for highly efficient near-infrared emission

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Aggregate 2024年第6期5卷 340-351页

作者： Jingyi Xu Jie Xue Yu Dai Jinyuan Zhang Jiajun Ren Chengyu Yao Shaman Li Qingyu Meng Xueliang Wen Haoyun Shao Juan Qiao Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education Department of ChemistryTsinghua UniversityBeijingChina Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijingChina Key Laboratory of Theoretical and Computational Photochemistry College of ChemistryMinistry of EducationBeijing Normal UniversityBeijingChina Laboratory for Flexible Electronics Technology Tsinghua UniversityBeijingChina

Intermolecular charge transfer(inter-CT)is commonly considered to quench luminescence in molecular aggregates,especially for near-infrared(NIR)***,by elaborate comparison ofπ-bridge effects in donor/acceptor(D/A)molecules,it is disclosed that aπ-bridge is essential in D/A molecule to involve inter-CT in aggregates for inducing desired thermally activated delayed fluorescence(TADF)and largely suppressing non-radiative decays,and importantly,electrondonatingπ-bridge is critical to maximize radiative decay for inter-CT dominated emission by effective electronic coupling with bright intramolecular charge transfer(intra-CT)for high-efficiency NIR *** a proof-of-concept,TPATAP with thienyl asπ-bridge realized prominent photoluminescence quantum yields of 18.9%at 788 nm in solid films,and achieved record-high maximum external quantum efficiencies of 4.53%at 785 nm in *** findings provide fresh insight into interplay between inter-CT and intra-CT in molecular aggregates and open a new avenue to attenuate the limitation of energy gap law for developing highly efficient NIR emitters and improving the luminescent efficiency of various inter-CT systems,such as organic photovoltaic,organic long persistent luminescence,etc.

关键词： intermolecular charge transfer molecular aggregates near-infrared emission organic light-emitting diodes thermally activated delayed fluorescence

Stable Diarylamine-Substituted Tris(2,4,6-trichlorophenyl)methyl Radicals: One-Step Synthesis, near-infrared emission, and Redox Chemistry

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CCS Chemistry 2022年第9期4卷 3190-3203页

作者： Chuan Yan Dongyue An Weinan Chen Ning Zhang Yanjun Qiao Jing Fang Xuefeng Lu Gang Zhou Yunqi Liu Lab of Advanced Materials State Key Laboratory of Molecular Engineering of PolymersFudan UniversityShanghai 200438 Department of Materials Science Fudan UniversityShanghai 200438

A mild one-step radical-to-radical synthetic strategy has been developed to directly produce a new family of diarylamine-substituted tris(2,4,6-trichlorophenyl)methyl(TTM)radicals TTM-DPA,TTM-DBPA,and *** obtained TTM radical derivatives are extremely stable during chromatography purification and long-term storage in the solid state.

关键词： tris(2 4 6-trichlorophenyl)methyl radical diarylamine one-step synthesis near-infrared emission redox chemistry

near-infrared emission based on Platinum Complexes for Solution-Processed Polymer Light-Emitting Diodes

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Near-Infrared Emission based on Platinum Complexes for Solut...

Nanoparticles with near-infrared emission Enhanced by Pillararene-Based Molecular Recognition in Water

中国化学会第十三届全国有机合成化学学术研讨会

作者： Zhang You-Ming Meng Fan-Yuan You Cai-Fa Yang Sheng-Yi Xiong Wen-Jing Yu Jun-Ting Wang Ya-Fei Su Shi-Jian Zhu Wei-Guo School of Materials Science and Engineering Changzhou University College of Chemistry Xiangtan University State Key Laboratory of Luminescent Materials and Devices South China University of Technology College of Chemistry and Chemical Engineering Hunan University of Science and Technology

In the past decade,near-infrared（NIR）-emitting materials have drawn great attention in the solution-processed polymer light-emitting diodes（PLEDs） with potential applications in night-vision displays,sensors,optical communication,and medical *** highest maximum external quantum efficiency（EQE） of 14.7% was demonstrated in these platinum-based NIR emission *** order to deveolp new NIR-emitting platinum complexes and further study their structure-property relationship,some D-A-type mono-and bi-nuclear cyclometalated platinum complexes were designed and synthesized with multiple donor（D） units of triphenylamine（TPA） or carbazole（Cz） and acceptor（A） units of benzothiadiazol（BT） or phenazine（PZ）.By tuning coordination configuration,D-A framework and linking positions,these mono-and bi-nuclear cyclometalated platinum complexes exhibited significantly different electroluminescence performance in the *** these PLEDs with a configuration of ITO/PEDOT（40 nm）/PVK:complexes（50-60 nm）/TPBI（30 nm）/Ba（4 nm）/Al,the highest EQE of 0.85% and a radiance of 164 μW/cm2 at an electroluminescent peak of 750 nm are obtained.

关键词： near-infrared emission Donor-accepter Platinum complexes Polymer light-emitting diodes

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Nanoparticles with Near-Infrared Emission Enhanced by Pillar...

near-infrared organic lasers with ultra-broad emission bands by simultaneously harnessing four-level and six-level systems

全国第十八届大环化学暨第十届超分子化学学术讨论会

作者： Bingbing Shi Feihe Huang State Key Laboratory of Chemical Engineering Center for Chemistry of High-Performance ＆ Novel MaterialsDepartment of Chemistry Zhejiang University

＜正＞near-infrared（NIR）fluorescent emission can realize very small photodamage to biological samples,minimum interference from biomolecule autofluorescence,and deep tissue penetration.1Here we report the unprecedented preparation of nanoparticles with near-infrared emission enhanced by host-guest complexation between a water soluble pillar[5]arene（WP5）and a

关键词： near-infrared emission pillararenas nanoparticles host-guest chemistry

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Chinese Chemical Letters 2024年第8期35卷 288-293页

作者： Lei Wang Jun-Jie Wu Chang-Cun Yan Wan-Ying Yang Zong-Lu Che Xin-Yu Xia Xue-Dong Wang Liang-Sheng Liao Jiangsu Key Laboratory for Carbon-Based Functional Materials&Devices Institute of Functional Nano&Soft Materials(FUNSOM)Soochow UniversitySuzhou 215123China Jiangsu Engineering Laboratory of Novel Functional Polymeric Materials College of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China Macao Institute of Materials Science and Engineering Macao University of Science and TechnologyMacao SAR 999078China

Organic lasers with broad emission bands in near-infrared(NIR)region are crucial for their applications in laser communication,night-vision as well as bioimaging owing to the abundance of selectable lasing ***,for most organic gain materials,gain regions are limited in a small wavelength range because of the fixed energy level ***,we design a strategy to realize NIR organic lasers with broad emission bands based on tunable energy level systems induced by cascaded excited-state intramolecular proton transfer(ESIPT).A novel gain material named DHNN was developed,which can undergo a cascaded double-ESIPT process supporting four-level and six-level systems *** doping DHNN into polystyrene microspheres,NIR lasers with tunable emission bands can be achieved based on the careful modulation of ***,organic lasers with an ultra-broad emission band ranging from 700 nm to 900 nm was successfully achieved by harnessing four-level and six-level systems simultaneously.

关键词： Excited-state intramolecular proton transfer Organic solid-state laser Wide gain interval near-infrared emission Molecular design

Rational Design of a near-infrared Fluorescent Material with High Solid-state Efficiency,Aggregation-induced emission and Live Cell Imaging Property

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Chemical Research in Chinese Universities 2022年第6期38卷 1461-1466页

作者： SHANG Anqi ZHAO Lele LI Zhenhua CHENG Zhuang JIN Haixu FENG Zijun CHEN Zhijun ZHANG Haiquan LU Ping State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun130012P.R.China State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao066004P.R.China

near-infrared(NIR)fluorescent materials with high photoluminescent quantum yields(PLQYs)have wide application ***,we design and synthesize a D-A type NIR organic molecule,TPATHCNE,in which triphenylamine and thiophene are utilized as the donors and fumaronitrile is applied as the *** systematically investigate its molecular structure and photophysical *** shows high T_(g) of 110℃ and T_(d) of 385℃ and displays an aggregation-induced emission(AIE)property.A narrow optical bandgap of 1.65 eV is *** non-doped film of TPATHCNE exhibits a high PLQY of 40.3%with an emission peak at 732 nm,which is among the best values of NIR *** TPATHCNE is applied in organic light-emitting diode(OLED),the electroluminescent peak is located at 716 nm with a maximum external quantum efficiency of 0.83%.With the potential in cell imaging,the polystyrene maleic anhydride(PMSA)modified TPATHCNE nanoparticles(NPs)emit strong fluorescence when labeling HeLa cancer cells,suggesting that TPATHCNE can be used as a fluorescent carrier for specific staining or drug delivery for cellular *** NPs fabricated by bovine serum protein(BSA)are cultivated with mononuclear yeast cells,and the intense intracellular red fluorescence indicates that it can be adopted as a specific stain for imaging.

关键词： near-infrared emission Aggregation-induced emission High solid-state efficiency Organic light-emitting diode

Upconverting and downshifting circularly polarized luminescence in a superstructural helix

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Science China Chemistry 2024年第8期67卷 2571-2577页

作者： Honghan Ji Bin Wu Enquan Tian Chao Ren Xue Jin Liangliang Zhu Pengfei Duan CAS Key Laboratory of Nanosystem and Hierarchical Fabrication National Center for Nanoscience and Technology(NCNST)Beijing 100190China State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceFudan UniversityShanghai 200438China University of Chinese Academy of Sciences Beijing 101408China

The modulation of circularly polarized luminescence(CPL) has become an increasingly prominent area of research. In this study,we propose a unique “one-excitation-to-three-emissions” CPL system through the co-assembly of an upconversion system,incorporating one sensitizer(Pt(II) mesotetraphenyl tetrabenzoporphyrine, Pt TPBP) and two annihilators(R/S-DPA and R/SBDP) within liquid crystals. The chiral nature of the annihilators induces a transformation of the nematic liquid crystal into chiral nematic liquid crystals(N*LC), establishing an excellent chiral matrix. Upon the incorporation of the sensitizer Pt TPBP and subsequent excitation at 635 nm, the system demonstrates two independent triplet–triplet annihilation photon upconversion(TTA-UC) with the emission in blue and yellow, aided by thermally activated triplet–triplet energy transfer(TTET). This is accompanied by the simultaneous generation of upconverting circularly polarized luminescence(UC-CPL) and downshifting near-infrared circularly polarized luminescence(DS-CPL) originating from the residual luminescence of Pt TPBP. Remarkably,fine-tuning the ratio between the two annihilators allows the TTA-UC system to exhibit multicolor CPL emission with an amplified luminescence dissymmetry factor(glum, reaching up to 0.6). Our study unveils a previously unreported “one-excitation-to-three-emissions” system and provides a versatile strategy for modulating CPL emissions, surpassing conventional methodologies.

关键词： circularly polarized luminescence triplet–triplet annihilation upconversion near-infrared emission chiral nematic liquid crystal luminescence dissymmetry factor