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Enhanced Emission of Molybdenum Disulfide by Organic−Inorganic Hybrid Heterojunctions

Precision Chemistry 2023年第6期1卷 357-362页

作者： Si-wei Zhang Fulong Ma Jinhui Jiang Zaiyu wang Zijie Qiu jacky w.y.lam Guodan wei Zheng Zhao Ben Zhong Tang Department of Chemistry and the Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction The Hong Kong University of Science and Technology999077 Hong KongChina School of Science and Engineering Shenzhen Institute of Aggregate Science and TechnologyThe Chinese University of Hong KongShenzhen(CUHK-Shenzhen)Guangdong 518172China Tsinghua-Berkeley Shenzhen Institute Institute of Materials ScienceTsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China Tang−Department of Chemistry and the Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction The Hong Kong University of Science and Technology999077 Hong KongChina Center for Aggregation-Induced Emission South China University of TechnologyGuangzhou 510640China

Due to their excellent stability and layer-dependent photoelectronic properties,transition metal dichalcogenides(TMDs)are one of the most extensively studied two-dimensional semiconductor materials in the postgraphene ***,its low luminescence quantum yield limits its application in displays,lighting,and ***,a 1,4,5,8,9,11-hexaazatriphenylenehexacarbonitrile(HATCN)layer was grown on the surface of chemical vapor deposition(CVD)-grown monolayer molybdenum disulfide(MoS_(2))by vacuum evaporation,which increased the photoluminescence intensity of MoS_(2)by 15 *** enhanced luminescence originates from the charge transfer from the conduction band of MoS_(2)to the lowest unoccupied molecular orbital(LUMO)of HATCN,which suppresses the emission of the negatively charged exciton(trion)while increasing the emission of the neutral ***-dependent fluorescence and Raman spectra demonstrate the feasibility of organic−inorganic hybrid heterojunctions for regulating *** facile and practical organic−inorganic hybrid heterojunction can elevate TMD applications,such as light-emitting diodes.

关键词： TMDs MoS_(2) CVD photoluminescence organic−inorganic hybrid heterojunction

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Organic near-infrared photodetectors with photoconductivityenhanced performance

Aggregate

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Aggregate 2023年第5期4卷 120-127页

作者： Siwei Zhang Zhenlong Li Jingzhou Li Bingzhe wang Fang Chen Xubiao Li Shunjie Liu jacky w.y.lam Guichuan Xing Jiangyu Li Zheng Zhao Feiyu Kang Guodan wei Ben Zhong Tang Department of Chemistry Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction and Guangdong-Hong Kong-Macro Joint Laboratory of Optoelectronic and Magnetic Functional MaterialsThe Hong Kong University of Science and TechnologyKowloonHong KongChina Tsinghua-Berkeley Shenzhen Institute Institute of Materials ScienceTsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhenChina Hangzhou Institute for Advanced Study University of Chinese Academy of SciencesHangzhouChina Institute of Applied Physics and Materials Engineering University of MacaoAvenida da UniversidadeTaipaMacaoChina Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhenChina Changchun Institute of Applied Chemistry Chinese Academy of SciencesChangchunChina School of Science and Engineering Shenzhen Institute of Aggregate Science and TechnologyThe Chinese University of Hong KongShenzhenChina Center for Aggregation-Induced Emission South China University of TechnologyGuangzhouChina

Organic near-infrared(NIR)photodetectors with essential applications in medical diagnostics,night vision,remote sensing,and optical communications have attracted intensive research *** with most conventional inorganic counterparts,organic semiconductors usually have higher absorption coefficients,and their thin active layer could be sufficient to absorb most incident light for effective ***,due to the relatively poor charge mobility of organic materials,it remains challenging to inhibit the photogenerated exciton recombination and effectively extract carriers to their respective ***,this challenge was addressed by increasing matrix conductivities of a ternary active layer(D–A–D structure NIR absorber[2TT-oC6B]:poly(N,N′-bis-4-butylphenyl-N,N′-bisphenyl)benzidin[PolyTPD]:[6,6]-phenyl-C61-butyric acid methyl ester[PCBM]=1:1:1)upon in situ incident light illumination,significantly accelerating charge transport through percolated interpenetrating *** greatly enhanced photoconductivity under illumination is intrinsically related to the unique donor–acceptor molecular structures of PolyTPD and 2TT-oC6B,whereas stable intermolecular interaction has been verified by systematic molecular dynamics *** addition,an ultrafast charge transfer time of 0.56 ps from the NIR aggregation-induced luminogens of 2TT-oC6B absorber to PolyTPD and PCBM measured by femtosecond transient absorption spectroscopy is beneficial for effective exciton *** solution-processed organic NIR photodetector exhibits a fast response time of 83μs and a linear dynamic range value of 111 dB under illumination of 830 ***,our work has opened up a pioneering window to enhance photoconductivity through in situ photoirradiation and benefit NIR photodetectors as well as other optoelectronic devices.

关键词： AIEgens organic NIR photodetectors photoconductivity

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Taming Reactive Oxygen Species:Mitochondria-Targeting Aggregation-Induced Emission Luminogen for Neuron Protection via Photosensitization-Triggered Autophagy

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CCS Chemistry 2022年第7期4卷 2249-2257页

作者： Chao Chen Ruoyao Zhang Jianyu Zhang yufan Zhang Haoke Zhang Zaiyu wang Xiaolin Huang Sijie Chen Ryan T.K.Kwok jacky w.y.lam Dan Ding Ben Zhong Tang Department of Chemistry Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and ReconstructionInstitute for Advanced StudyState Key Laboratory of Molecular NanoscienceDivision of Life ScienceDepartment of Chemical and Biological EngineeringThe Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong 999077 State Key Laboratory ofMedicinal Chemical Biology Key Laboratory of Bioactive MaterialsMinistry of EducationCollege of Life SciencesNankai UniversityTianjin 300071 Ming wai Lau Centre for Reparative Medicine Karolinska InstitutetHong Kong 999077 Center for Aggregation-Induced Emission SCUT-HKUST Joint Research InstituteState Key Laboratory of Luminescent Materials and DevicesSouth China University of TechnologyGuangzhou 510640 Shenzhen Institute of Aggregate Science and Technology School of Science and EngineeringThe Chinese University of Hong KongShenzhen 518172 AIE Institute Guangzhou Development DistrictHuangpuGuangzhou 510530

Oxidative damage to cells leads to accumulated harmful wastes,which in turn aggravate the imbalance of reactive oxygen species(ROS)and related ***,provoking the cellular defense system against severe oxidation and maintaining ROS homeostasis are ***,we designed and synthesized a powerful mitochondria-targeting aggregation-induced emission photosensitizer(named DTCSPy)by maximal restriction of heat *** is demonstrated that taming ROS generation within mitochondria through photosensitization-triggered autophagy via DTCSPy achieved a better neuroprotective effect against oxidative damages than Nacety-L-cysteine and vitamin *** work not only provides a new way to design high-performance photosensitizers by regulating the photophysical property,but also verifies the concept that taming ROS can be used for cell protection against destructive oxidation,thereby displaying broad prospects for alleviating oxidation-related diseases and promoting cell-based therapy.

关键词： aggregation-induced emission mitochondrial targeting photosensitizer reactive oxygen species neuron protection

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A general powder dusting method for latent fingerprint development based on AIEgens

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中国科学：化学英文版 2018年第8期61卷 966-970页

作者： Zijie Qiu Bin Hao Xinggui Gu Zhaoyu wang Ni Xie jacky w.y.lam Hongxia Hao Ben Zhong Tang Key Laboratory of Evidence Science (China University of Political Science and Law) Ministry of Education Beijing 100088 China Collaborative Innovation Center of Judicial Civilization China Department of Chemistry Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction Division of Life Science State Key Laboratory of Molecular Neuroscienee Institute for Advanced Study Institute of Molecular Functional Materials Division of Biomedical Engineering the Hong Kong University of Science and Technology Clear Water Bay Kowloon China NSFC Center for Luminescence from Molecular Aggregates SCUT-HKUST Joint Research Institute State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou 510640 China

Powder dusting method is the most practically useful approach for latent fingerprint development in the crime scene. Herein, a general powder dusting method has been explored for latent fingerprint development based on aggregation-induced emission luminogens(AIEgens). A series of tetraphenylethene(TPE) derivatives with multiple diphenylamine(DPA), namely, TPE-DPA,TPE-2 DPA and TPE-4 DPA, were selected as candidates to dope with magnetic powders and applied for latent fingerprint development. After screening, the magnetic powder 3 doped with TPE-4 DPA proves to be the best, in terms of fluorescent intensity, resolution and adhesiveness. Afterwards, the magnetic powder 3 was applied for visualization of latent fingerprint on various smooth and porous substrates, including glass, stainless steel, leaf, ceram, plastic bag, lime wall, wood and paper *** details, such as island, core, termination and bifurcation, can be clearly observed for the fluorescent fingerprint images.

关键词：指纹图象粉末开发 DPA 犯罪现场荧光灯二苯胺衍生物

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New carbazole-substituted siloles for the fabrication of efficient non-doped OLEDs

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Chinese Chemical Letters 2019年第3期30卷 592-596页

作者： yi Xiong Jiajie Zeng Bin Chen jacky w.y.lam Zujin Zhao Shuming Chen Ben Zhong Tang State Key Laboratory of Luminescent Materials and Devices Center for Aggregation-Induced Emission South China University of Technology Department of Chemistry Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction The Hong Kong University of Science & Technology Department of Electrical and Electronic Engineering South University of Science and Technology of China

Luminogenic molecules with aggregation-induced emission(AIE) property are free of aggregationcaused quenching and thus have great potential in the fabrication of efficient non-doped OLEDs. Herein, a series of new carbazole-substituted siloles have been synthesized and characterized. Their crystal and electronic structures, thermal stabilities, electrochemical behaviors, and photophysical properties are thoroughly investigated. These silole derivatives exhibit prominent AIE characteristics with high emission efficiencies in solid films. They can function as light-emitting layers in non-doped OLEDs,affording eminent electroluminescence efficiencies of 17.59 cd/A, 12.55 Im/w and 5.63%, amongst the most efficient non-doped OLEDs based on fluorescent emitters, indicating their promising applications in OLEDs.

关键词： Aggregation-induced emission Silole Photoluminescence Electroluminescence Organic light-emitting diode

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A versatile AIE fluorogen with selective reactivity to primary amines for monitoring amination,protein labeling,and mitochondrial staining

聚集体(英文)

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聚集体(英文) 2023年第1期4卷 250-259页

作者： Xinyuan He Huilin Xie Lianrui Hu Pengchao Liu Changhuo Xu wei He wutong Du Siwei Zhang Hao Xing Xinyue Liu Hojeong Park Tsz Shing Cheung Min-Hui Li Ryan T.K.Kwok jacky w.y.lam Jian Lu Ben Zhong Tang Department of Chemistry Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and ReconstructionState Key Laboratory of Molecular NeuroscienceDivision of Life Science and Department of Chemical and Biological EngineeringThe Hong Kong University of Science and TechnologyKowloonHong KongChina Department of Mechanical Engineering City University of Hong KongGreater Bay Joint DivisionShenyang National Laboratory for Materials ScienceKowloonHong KongChina Chimie ParisTech PSL University Paris CNRSInstitut de Recherche de Chimie ParisParisFrance Department of Chemistry Guangdong-Hongkong-Macou Joint Laboratory of Optoelectronic and Magnetic Functional MaterialsThe Hong Kong University of Science and TechnologyKowloonHong KongChina Center for Aggregation-Induced Emission SCUT-HKUST Joint Research InstituteState Key Laboratory of Luminescent Materials and DevicesSouth China University of TechnologyGuangzhouChina School of Science and Engineering Shenzhen Key Laboratory of Functional Aggregate MaterialsThe Chinese University of Hong KongShenzhen CityGuangdongChina

Specific bioconjugation for native primary amines is highly valuable for both chemistry and biomedical *** all the efforts,scientists lack a proper strategy to achieve high selectivity for primary amines,not to mention the requirement of fast response in real ***,we report a chromone-based aggregation-induced emission(AIE)fluorogen called CMVMN as a self-reporting bioconjugation reagent for selective primary amine identification,and its applications for monitoring bioprocesses of amination and protein *** is AIE-active and capable of solid-state ***,its electrospun films are manufactured for visualization of amine diffusion and leakage *** also shows good biocompatibility and potential mitochondria-staining ability,which provides new insight for organelle-staining probe *** with its facile synthesis and good reversibility,CMVMN would not only show wide potential applications in biology,but also offer new possibilities for molecular engineering.

关键词： aggregation-induced emission(AIE) bioconjugation mitochondria-staining primary amines protein labeling

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A Simple Approach to Achieve Organic Radicals with Unusual Solid-State Emission and Persistent Stability

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CCS Chemistry 2022年第6期4卷 1912-1920页

作者： Xueqian Zhao Junyi Gong Parvej Alam Chao Ma yanpei wang Jing Guo Zebin Zeng Zikai He Herman H.y.Sung Ian D.williams Kam Sing wong Sijie Chen jacky w.y.lam Zheng Zhao Ben Zhong Tang Department of Chemistry Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and ReconstructionInstitute for Advanced Study and Guangdong-Hong Kong-Macro Joint Laboratory of Optoelectronic and Magnetic Functional MaterialsHong Kong University of Science and TechnologyClear Water BayKowloonHong Kong 999077 Department of Physics Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong 999077 State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical EngineeringHunan UniversityChangshaHunan Province 410082 School of Science Harbin Institute of TechnologyShenzhenHIT Campus of University TownShenzhenGuangdong Province 518055 Ming wai Lau Centre for Reparative Medicine Karolinska InstitutetHong Kong 999077 School of Science and Engineering Chinese University of Hong KongShenzhenGuangdong Province 518172 HKUST-Shenzhen Research Institute South Area Hi-Tech ParkNanshanShenzhenGuangdong Province 518057 Center for Aggregation-Induced Emission SCUTHKUST Joint Research InstituteState Key Laboratory of Luminescent Materials and DevicesSouth China University of TechnologyGuangzhouGuangdong Province 510640 AIE Institute Guangzhou Development DistrictHuangpuGuangzhouGuangdong Province 510530

Sable organic radicals are promising materials for information storage,molecular magnetism,electronic devices,and biological *** organic radicals have been prepared,but most are non-or weakly emissive and degrade easily upon *** remains challenging to produce stable and efficient luminescent radicals because of the absence of general guidelines for their ***,we present a photoactivation approach to generate a stable luminescent radical from tris(4-chlorophenyl)phosph ine(TCPP)with red emission in the crystal *** mechanistic study suggests that the molecular symmetry breaking in the crystal causes changes of molecular conformation,redox properties,andmolecular packing that facilitates radical generation and *** design strategy demonstrates a straightforward approach to develop stable organic luminescent radicals that will open new doors to photoinduced luminescent radical materials.

关键词： luminescent radicals symmetry breaking tris(4-chlorophenyl)phosphine anticounterfeiting photoinduced electron transfer

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Red-emitting salicylaldehyde Schiff base with AIE behaviour and large Stokes shift

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Chinese Chemical Letters 2018年第10期29卷 1493-1496页

作者： Junyi Gong Peifa wei yuanan Su ying Li Xing Feng jacky w.y.lam Dongzhou Zhang Xiangzhi Song Ben Zhong Tang College of Chemistry and Chemical Engineering Central South University Department of Chemistry Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and ReconstructionDivision of Life Science and Division of Biomedical EngineeringThe Hong Kong University of Science and Technology Partnership for Extreme Crystallography Hawaii Institute of Geophysiscs and PlanetologyUniversity of Hawaii at Manoa

Three salicylaldehyde Schiff base（SSB）, iso-PBP, PBP and EPB, were facilely synthesized and exhibited aggregation-induced emission. The introduction of C= N-N = C moiety in these SSB dyes largely extend the conjugation system and push their emission to yellow to red spectral region. These SSB dyes were negligibly fluorescent in dilute THF solution. In THF/water mixtures with high water fractions, they displayed strong yellow to red fluorescence（up to 617nm） and large Stokes shifts（up to 152 nm）. Single crystal analysis on EBP showed the longer emission of in aggregated state was attributed to the molecular packing effect as compared with that in dilute solution. The bio-imaging application indicated EBP could specifically accumulate in lipid droplets in living cells.

关键词： Aggregation-induced emission Salicylaldehyde Schiff base Red-emitting ESIPT Aldehyde-amine condensation

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“On water”Effect for Green Click Reaction:Spontaneous Polymerization of Activated Alkyne with“Inert”Aromatic Amine in Aqueous Media

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CCS Chemistry 2023年第2期5卷 385-396页

作者： Xinyue Liu Chen Zhang Lianrui Hu Jinghan wang Kai Li Hai-Tao Feng jacky wylam Benzhao He Ben Zhong Tang Department of Chemistry Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and ReconstructionGuangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional MaterialsThe Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong 999077 HKUST-Shenzhen Research Institute Shenzhen 518057 Department of Biomedical Engineering SUSTech Academy for Advanced Interdisciplinary StudiesSouthern University of Science and TechnologyShenzhen 518055 AIE Research Center Shaanxi Key Laboratory of PhytochemistryCollege of Chemistry and Chemical EngineeringBaoji University of Arts and SciencesBaoji 721013 Center for Advanced Materials Research Beijing Normal University at ZhuhaiZhuhai 519085 School of Science and Engineering Shenzhen Institute of Aggregate Science and TechnologyThe Chinese University of Hong KongShenzhen 518172

Organic reactions in water have attracted great attention due to their advantages such as unique reaction performance and environmental *** reactions as well as polymerizations in aqueous media have been extensively investigated,and so far,there has been a massive amount of reporting about polymerizations in ***,reports about click polymerization in water have been ***,click polymerization of activated alkyne and aromatic amine in aqueous media is ***“on water”effect facilitates polymerization in aqueous media better than in organic solvents,and its mechanism is deciphered through experimental data and theoretical *** participates in the reaction and reduces the energy barrier to some ***,polymerization makes it possible for aromatic amine with low reactivity to be *** using this strategy,polymers with high molecular weights can be obtained in high yields(up to 95.4%).They show good thermal stability and high *** can be *** polymers with tetraphenylethylene moieties show aggregation-induced emission and can be used as materials for generating photopatterns and visualizing agents for specific staining of lysosome in living cells.

关键词： “on water”effect click polymerization aromatic amine photodegradation specific lysosome-staining

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Photodegradation-Induced Turn-On Luminescence of Tetraphenylethylene-Based Trithiocarbonate Polymers

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Chinese Journal of Chemistry 2021年第10期39卷 2837-2842页

作者： Hanchen Shen wenjie wu Shunjie Liu Jing Zhang jacky wylam Ben Zhong Tang Department of Chemistry Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction and Institute of Advanced StudyThe Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongChina Department of Laboratory Medicine Nanfang HospitalSouthern Medical UniversityGuangzhouGuangdong 510515China HKUST Shenzhen Research Institute No.9 Yuexing 1 st RDSouth Area Hi-tech ParkNanshanShenzhenGuangdong518057 China Center for Aggregation-induced Emission SCUT-HKUST Joint Research InstituteState Key Laboratory of Luminescent Materials and DevicesSouth China University of TechnologyGuangzhouGuangdong510640 China HKUST AIE Institute Guangzhou Development DistrictHuangpuGuangzhouGuangdong510530 China Guangdong-Hong Kong-Macao Joint laboratory of Optoelectronic and Magnetic Functional Materials The Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongChina

Main observation and conclusion Fluorescent intelligent materials have attracted wide attention because of their great potential *** major hurdle for the development and application of fluorescent intelligent materials is the aggregation-caused quenching effect in the solid ***,tetraphenylethylene-based trithiocarbonate polymers with satisfactory molecular weights(Mw up to 24900)were synthesized through a one-pot polymerization route under mild *** polymers were non-emissive due to the quenching effect of the trithiocarbonate ***,upon UV irradiation,the polymers degraded and strong emission from the tetraphenylethylene unit was *** a unique property endows them with great potential applications,such as photopatterning,anti-counterfeit labels,and UV detection.

关键词： Photochemistry Trithiocarbonate polymers Luminescence Polymerization Aggregation-induced emission

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