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Stimuli-responsive organic chromic materials with near-infrared emission

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Chinese Chemical Letters 2018年第10期29卷 1429-1435页

作者： Weijie Chen Yingle Pan Jianhua Chen Fengying Ye Sheng Hua Liu Jun Yin Key Laboratory of Pesticide and Chemical Biology Ministry of EducationCollege of ChemistryCentral China Normal University

Organic chromic materials that respond to external stimuli, especially in the solid state, have sparked extensive interest owing to their potential use as smart materials. In particular, the availability of chromic materials, which emit fluorescence or phosphorescence in the deep penetrating, near-infrared（NIR）region, has led to great improvements in imaging. Various methods that were commonly applied to construct chromic materials, have been reformed to develop the novel type of compounds, and some have received rewards with excellent fingdings. Relevant research achievements of practical applications have showed their potential with the changes that locate in the NIR region, while further in-depth explorations about the inherent chromic chromism are underway. In this review, several representative studies, which have led the development of responsive organic chromic materials with near-infrared emission, will be discussed.

关键词： Stimuli-response near-infrared emission Fluorescent dyes Chromic materials Mechanochromism

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

Crown ether-assisted room-temperature halide passivation for highefficiency PbS quantum dots enabling large-area and long-lifetime near-infrared QD-OLEDs

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Nano Research 2023年第5期16卷 7537-7544页

作者： Zhen Jia Haoyun Shao Jingyi Xu Yu Dai Juan Qiao Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education Department of ChemistryTsinghua UniversityBeijing 100084China Laboratory for Flexible Electronics Technology Tsinghua UniversityBeijing 100084China

High-efficiency and low-cost near-infrared(NIR)emitting quantum dots(QDs)are highly desirable for next-generation intrinsically flexible NIR light *** passivation is commonly employed to passivate surface traps to obtain high-quality NIRemitting PbS QDs,but this procedure requires high temperature and inert *** we develop a facile roomtemperature halide passivation method for highly efficient NIR-emitting PbS QDs by employing crown ethers as a unique auxiliary *** and theoretical investigations reveal that the formation of K^(+)-crown ethers complex effectively facilitates the dissociation of KCl in toluene and releases more Cl^(−)ions for extraordinary halide passivation at room temperature and in the air,thus improving the photoluminescence quantum yield from 24%to 35%in solution and further to 44%in blend *** well-passivated PbS QD films are integrated with red organic light-emitting diodes(OLEDs)and the resulting QDOLEDs exhibit high-performance NIR emission centered at 887 nm,a high external quantum efficiency of 5.2%at a radiance of 10 W·sr^(−1)·m^(−2),superior operational stability with long lifetime T90 of 188 h at the current density of 25 mA·cm^(−2).We also construct a large-area NIR QD-OLED(5 cm×5 cm)with desirable uniform *** work opens a new avenue to achieve robust large-area NIR planar light sources for broad applications.

关键词： near-infrared emission PbS quantum dot chloride surface passivation crown ether light-emitting diode

near-infrared carbon nanodots for effective identification and inactivation of Gram-positive bacteria

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Nano Research 2022年第3期15卷 1699-1708页

作者： Wen-Bo Zhao Rui-Ting Wang Kai-Kai Liu Meng-Ru Du Yong Wang Yu-Qi Wang Rui Zhou Ya-Chuan Liang Ruo-Nan Ma Lai-Zhi Sui Qing Lou Lin Hou Chong-Xin Shan Henan Key Laboratory of Diamond Optoelectronic Materials and Devices Key Laboratory of Materials PhysicsMinistry of Educationand School of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450052China School of Pharmaceutical Sciences Key Laboratory of Targeting Therapy and Diagnosis for Critical DiseasesCollaborative Innovation Center of New Drug Research and Safety EvaluationZhengzhou UniversityZhengzhou 450001China Henan Key Laboratory of Ion-beam Bioengineering School of Agricultural ScienceZhengzhou UniversityZhengzhou 450052China State Key Laboratory of Molecular Reaction Dynamics Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China

An unacceptable increase in antibacterial resistance has arisen due to the abuse of multiple classes of broad-spectrum ***,it is significant to develop new antibacterial agents,especially those that can accurately identify and kill specific ***,we demonstrate a kind of perilla-derived carbon nanodots(CNDs),integrating intrinsic advantages of luminescence and photodynamic,providing the opportunity to accurately identify and kill specific *** CNDs have an exotic-doped andπ-conjugated core,vitalizing them near-infrared(NIR)absorption and emission properties with photoluminescence quantum yield of 21.1%;hydrophobic chains onto the surface of the CNDs make them to selectively stain Gram-positive bacteria by insertion into their *** to the strong absorption in NIR region,reactive oxygen species are in situ generated by the CNDs onto bacterial membranes under 660 nm irradiation,and 99.99%inactivation efficiency against Gram-positive bacteria within 5 min can be *** vivo results demonstrate that the CNDs with photodynamic antibacterial property can eliminate the inflammation of the area affected by methicillin-resistant Staphylococcus aureus(MRSA),and enabling the wound to be cured quickly.

关键词： carbon nanodots near-infrared emission specific identification anti-bacteria photodynamic therapy