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Aggregate 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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“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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聚｛11-[(4′-正庚氧基-4-联苯基)羰基]氧-1-十一炔｝的相结构与相转变

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高分子学报 2010年第6期20卷 759-764页

作者：余振强刘嘉浩朱才镇陈尔强 lam jacky wing yip 唐本忠北京大学化学与分子工程学院高分子科学与工程系高分子化学与物理教育部重点实验室北京100871 深圳大学化学与化工学院深圳市功能高分子重点实验室深圳518060 香港科技大学化学系

采用示差扫描量热法(DSC)、一维(1D)、二维(2D)广角X-射线衍射(wAXD)和偏光显微镜(PLM)等研究手段对聚{11-[(4′-正庚氧基-4-联苯基)羰基]氧-1-十一炔}(PA-9,7)的本体相转变和相结构进行研究,并采用分子动力学方法对相结构进行模拟.结... 详细信息

采用示差扫描量热法(DSC)、一维(1D)、二维(2D)广角X-射线衍射(wAXD)和偏光显微镜(PLM)等研究手段对聚{11-[(4′-正庚氧基-4-联苯基)羰基]氧-1-十一炔}(PA-9,7)的本体相转变和相结构进行研究,并采用分子动力学方法对相结构进行模拟.结果表明,样品的相转变为近晶B相(SmB)近晶A相(SmA)各向同性态(Iso).在近晶B相中,侧链在层状结构中排列成具有六次对称性的准长程有序结构。

关键词：聚炔液晶相结构相转变X-射线衍射

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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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Fast compression of computer-generated holographic images based on a GPU-accelerated skip-dimension vector quantization method

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Chinese Optics Letters 2013年第5期11卷 28-32页

作者： y.K.lam w.C.Situ P.w.M.Tsang Department of Electronic Engineering City University of Hong Kong

A method for fast and low bit-rate compression of digital holograms based on a new vector quantization （VQ） method known as the skip-dimension VQ （SDVQ） is proposed. Briefly, a complex hologram is converted into a real off-axis hologram, and partitioned into a set of image vectors. The image vectors are passed into a graphic processing unit （GPU）, and compressed through SDVQ into a set of code indices considerably smaller in data size than the source hologram. Experimental evaluation reveals that our scheme is capable of compressing a digital hologram to a compression ratio of over 500 times, in approximately 20-22 ms.

关键词： GPU Fast compression of computer-generated holographic images based on a GPU-accelerated skip-dimension vector quantization method VQ

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pH-responsive AIE nanogels for synergistic chemo-photodynamic cancer therapy with imaging guidance

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Science China Chemistry 2024年

作者： yilin Zhu Liping Zhang Rongyuan Zhang Chenghan He Han yang yong Liu Ryan T.K.Kwok jacky w.y.lam Jianwei Sun Jing Feng Zheng Zhao Cuiping yao Ben Zhong Tang Institute of Biomedical Photonics and Sensing School of Life Science and Technology Xi'an Jiaotong University Clinical Translational Research Center of Aggregation-Induced Emission The Second Affiliated Hospital School of Medicine School of Science and Engineering Shenzhen Institute of Aggregate Science and Technology The Chinese University of Hong KongShenzhen (CUHK-Shenzhen) Department of Urology Jining NO.1 People's Hospital AIE Institute Department of Chemistry the Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction Division of Life Science State Key Laboratory of Molecular Neuroscience and Department of Biological and Chemical Engineering The Hong Kong University of Science and Technology

Photodynamic therapy(PDT) is a promising cancer treatment that uses photosensitizers(PSs) to generate cytotoxic reactive oxygen species(ROS) under light, but improving its efficacy is crucial for clinical applications. To address this, we propose a smart nanoplatform(P@BAO-DOX) for synergistic chemo-photodynamic therapy, featuring efficient PDT, controllable drug release, and fluorescence imaging guidance. we designed an aggregation-induced emission(AIE)-based PS(BAO) with effective ROS generation and NIR-II fluorescence. Additionally, BAO as a PS and doxorubicin(DOX) as a chemo drug were encapsulated in pH-responsive nanogels(PNA) to obtain P@BAO-DOX nanogels. Upon uptake by tumor cells, the nanogel releases drugs in acidic conditions, leading to cell death. white light irradiation further triggers BAO to produce substantial ROS,enhancing phototoxicity and synergistic chemo-PDT cancer therapy. Thus, P@BAO-DOX nanogels, as a smart nanoplatform,offer precise drug release and efficient ROS generation for imaging-guided chemo-PDT synergistic therapy, showing promise in advancing cancer treatment.

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Fast and robust phase retrieval for masked coherent diffractive imaging

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Photonics Research 2022年第3期10卷 758-768页

作者： Li Song Edmund y.lam Department of Electrical and Electronic Engineering The University of Hong KongPokfulamHong KongChina

Conventional phase retrieval algorithms for coherent diffractive imaging(CDI)require many iterations to deliver reasonable results,even using a known mask as a strong constraint in the imaging setup,an approach known as masked *** paper proposes a fast and robust phase retrieval method for masked CDI based on the alternating direction method of multipliers(ADMM).we propose a plug-and-play ADMM to incorporate the prior knowledge of the mask,but note that commonly used denoisers are not suitable as regularizers for complex-valued latent images ***,we develop a regularizer based on the structure tensor and Harris corner *** with conventional phase retrieval methods,our technique can achieve comparable reconstruction results with less time for the masked ***,validation experiments on real in situ CDI data for both intensity and phase objects show that our approach is more than 100 times faster than the baseline method to reconstruct one complex-valued image,making it possible to be used in challenging situations,such as imaging dynamic ***,phase retrieval results for single diffraction patterns show the robustness of the proposed ADMM.

关键词： coherent phase retrieval

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Catalytically active interfaces in titania nanorod-supported copper catalysts for CO oxidation

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Nano Research 2020年第2期13卷 533-542页

作者： wasim U.Khan Season S.Chen Daniel C.w.Tsang w.y.yang Teoh Xijun Hu Frank L.y.lam Alex C.K.yip Department of Chemical and Process Engineering The University of Canterbury Christchurch 8041New Zealand Department of Civil and Environmental Engineering.The Hong Kong Polytechnic University Hong Kong.China School of Chemical Engineering The University of New South WalesSydneyNSW 2052Australia Department of Chemical and Biological Engineering The Hong Kong University of Science and TechnologyHong KongChina

One-dimensional titanium dioxide nanorod(TNR)-supported Cu catalysts(2.5 wt.%-12.5 wt.%)were synthesized using deposition-precipitation.X-ray photoelectron spectroscopy,temperature programmed reduction and CO chemisorption measurements showed that Cu doping over TNR offered metal-support interactions and interfacial active sites that had a profound impact on the catalytic *** role of the Cu-TNR interface was investigated by comparing the catalytic activity of Cu-TNR catalysts with that of pure CuO nanoparticles in CO *** presence of highly dispersed copper species,a high number of interfacial active sites,CO adsorption capacity and surface/lattice oxygen were found to be responsible for the excellent activity of 7.5CU-TNR(ie,Cu loading of 7.5 wt.%on TNR).Moreover,the Cu-TNR catalysts followed the Langmuir-Hinshelwood reaction mechanism with 7.5CU-TNR,exhibiting an apparent activation energy of 44.7 kJ/*** TNR-supported Cu catalyst gave the highest interfacial catalytic activity in medium-temperature CO oxidation(120-240℃)compared to other commonly used supports,including titanium dioxide nanoparticles(TiO2-P25),silica(SiO2)and alumina(Al20g)in which copper species were nonhomogeneously *** study confirms that medium-temperature CO oxidation is highly sensitive to the morphology and structure of the supporting material.

关键词： supported catalysts nanorod oxygen species interfacial active sites CO oxidation

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Towards creep property improvement of selective laser melted Ni-based superalloy IN738LC

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Journal of Materials Science & Technology 2022年第17期112卷 301-314页

作者： H.y.Song M.C.lam y.Chen S.wu P.D.Hodgson X.H.wu y.M.Zhu A.J.Huang Monash Centre for Additive Manufacturing 15-17 Normanby RdNotting HillVIC 3168Australia Department for of Materials Science and Engineering Monash UniversityClaytonVIC 3800Australia Monash Centre for Electron Microscopy 10 Innovation WalkClaytonVIC 3800Australia Institute for Frontier Materials Deakin UniversityVIC 3216Australia

Nickel-based superalloy IN738LC produced by selective laser melting(SLM)exhibits inferior hightemperature creep properties than its cast counterparts due to relatively smaller grain size,particularly for the plane normal to the building *** work studied effects of post heating strategy on the microstructure and especially the grain size to improve the high temperature creep *** asbuilt microstructure exhibited a fine grain size and large quantities of MC carbides that could effectively hinder grain *** was found that unconventional two-step heat treatments could lead to substantial grain growth,and the effect is particularly prominent at a specific *** ease of grain growth was explained after classifying the microstructural evolution(boundary carbide transformation)during each heating step and related to the reduced grain boundary pinning force from MC *** tests validated the effect of the new heat treatment scheme on the SLM-processed IN738LC at 850℃.An extended creep fracture life(1.5 to 4 times improvement)and lower secondary creep rates were achieved with samples subjected to the new.y.optimized two-step heat *** complete creep curves are also firstly presented for SLM-IN738LC,confirming the effectiveness of grain growth and highlighting the importance of dedicated heat treatment for SLM superalloys.

关键词： Selective laser melting IN738LC alloy Creep properties Heat treatments Grain structure

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5-{[(4′-正戊基氧-4-联苯基基)羰基]氧}-1-戊炔的相转变与相结构

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物理化学学报 2010年第4期26卷 817-821页

作者：余振强朱才镇田赛刘剑洪 lam jacky wing yip 唐本忠深圳大学化学与化工学院深圳市功能高分子重点实验室广东深圳518060 香港科技大学化学系

采用差示扫描量热(DSC)、一维(1D)广角X射线衍射(wAXD)、热台偏光显微镜(PLM-hotstage)等研究手段对含联苯液晶基元的侧链液晶聚炔单体5-{[(4′-正戊基氧-4-联苯基基)羰基]氧}-1-戊炔(A3EO5)的本体相转变和相结构进行了研究.DSC和1D-wAX... 详细信息

采用差示扫描量热(DSC)、一维(1D)广角X射线衍射(wAXD)、热台偏光显微镜(PLM-hotstage)等研究手段对含联苯液晶基元的侧链液晶聚炔单体5-{[(4′-正戊基氧-4-联苯基基)羰基]氧}-1-戊炔(A3EO5)的本体相转变和相结构进行了研究.DSC和1D-wAXD实验结果表明,A3EO5在升温和降温过程中均呈现四个相转变过程,形成双向性液晶.样品从各向同性态降温至室温过程中,首先形成近晶A相,随后进入层内排列具有准长程有序的近晶B相,继续降温将形成层内为正交排列的近晶E相,在此之后样品进入晶相.PLM结果指出样品在各向同性态降温过程中分别形成球状织构、角锥织构和同心圆弧织构.

关键词：液晶相结构相转变 X射线衍射近晶相

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