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Type I photosensitizer based on AIE chromophore tricyano-methylene-pyridine for photodynamic therapy

Green Chemical Engineering 2023年第3期4卷 324-330页

作者： Chao Pan Weijun Zhao Xiaolei Zhao Zhenxing Liu Xiangyu Li Yanting Lyu Xupeng Wu Zhirong Zhu Wei-Hong Zhu Qi Wang Shanghai Key Laboratory of Functional Materials Chemistry Key Laboratory for Advanced Materials and Institute of Fine ChemicalsJoint International Research Laboratory of Precision Chemistry and Molecular EngineeringFeringa Nobel Prize Scientist Joint Research CenterFrontiers Science Center for Materiobiology and Dynamic ChemistrySchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai200237China

Image guided photodynamic therapy(PDT)combines fluorescence tracing and phototherapy,which can achieve a more accurate and effective treatment ***,traditional photosensitizers are limited by the aggregation-caused fluorescence quenching(ACQ)effect and low reactive oxygen species(ROS)generation in a hypoxic environment,resulting in poor imaging and treatment ***,we report a tricyano-methylene-pyridine(TCM)-based Type I aggregation-induced emission(AIE)photosensitizer(TCM-MBP),the strong elec-tron acceptance(D-A)effect extends the wavelength to near-infrared(NIR)region to reduce the autofluorescence interference,and oxygen atoms provide lone pair electrons to enhance the inter system crossing(ISC)rate,thereby promoting the generation of more triplet states to produce *** AIE photosensitizer TCM-MBP exhibited low oxygen dependence,NIR emission,and higher ROS production compared to commercially avail-able Ce_(6) and *** encapsulation with DSPE-PEG 2000,TCM-MBP nanoparticles(TCM-MBP NPs)could penetrate to visualize cells and efficiently kill cancer cells upon light *** study provides an oxygen-independent AIE photosensitizer,which has great potential to replace the commercial ACQ photosensitizers.

关键词： Aggregation-induced emission Near-infrared emission Photodynamic therapy Type I ROS

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Covalent organic frameworks with imine proton acceptors for efficient photocatalytic H_(2) production

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Chinese Chemical Letters 2023年第10期34卷 265-269页

作者： Xiaolin Liu Xiya Yang Xu Ding Hailong Wang Wei Cao Yucheng Jin Baoqiu Yu Jianzhuang Jiang Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline MaterialsDepartment of Chemistry and Chemical EngineeringSchool of Chemistry and Biological EngineeringUniversity of Science and Technology BeijingBeijing 100083China State Key Laboratory of NBC Protection for Civilian Beijing 102205China

Covalent organic frameworks (COFs) are promising crystalline materials for the light-driven hydrogen evolution reaction (HER) due to their tunable chemical structures and energy band ***,deeply understanding corresponding mechanism is still challenging due to the multiple components and complicated electron transfer and reduction paths involved in photocatalytic ***,the photocatalytic HER investigation has been reported based on three COFs catalysts,1–3,which are prepared by benzo[1,2-b:3,4-b’:5,6-b’]trithiophene-2,5,8-trialdehyde to react with C3symmetric triamines including tris(4-aminophenyl)amine,1,3,5-tris(4-aminophenyl)benzene,and (1,3,5-tris-(4-aminophenyl)triazine,*** the isostructural hexagonal honeycomb-type COF of 2 and 3 reported previously,the crystal structure of 1 has been carefully correlated through the powder X-ray diffraction study with the help of theoretical simulations.1 shows highly porous framework with Brunauer-Emmett-Teller surface area of1249 m^(2)/***,the introduction of ascorbic acid into the photocatalytic system of COFs achieves the hydrogen evolution rate of 3.75,12.16 and 20.2 mmol g^(–1)h^(–1) for 1–3,*** important role of ascorbic acid in photocatalysis of HER is disclosed to protonate the imine linkages of these COFs,leading to the obvious absorbance red-shift and the improved charge separation efficiency together with reduced resistance in contrast to pristine materials according to the spectroscopic and electronic *** innovations of chemical and physical properties for these COFs are responsible for their excellent photocatalytic *** results elucidate that tiny modifications of COFs structures is able to greatly tune their band structures as well as catalytic properties,therefore providing an available approach for optimizing COFs functionalities.

关键词： Covalent organic framework Photocatalysis Hydrogen evolution reaction Imine linkage Protonation

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Ultralow-Temperature Heat Transport Evidence for Residual Density of States in the Superconducting State of CsV_(3)Sb_(5 )

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Chinese Physics Letters 2024年第12期41卷 141-148页

作者： C.C.Zhao L.S.Wang W.Xia Q.W.Yin H.B.Deng G.W.Liu J.J.Liu X.Zhang J.M.Ni Y.Y.Huang C.P.Tu Z.C.Tao Z.J.Tu C.S.Gong Z.W.Wang H.C.Lei Y.F.Guo X.F.Yang J.X.Yin S.Y.Li State Key Laboratory of Surface Physics Department of PhysicsFudan UniversityShanghai 200438China Shanghai Research Center for Quantum Sciences Shanghai 201315China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China ShanghaiTech Laboratory for Topological Physics Shanghai 201210China Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials and Micro-nano Devices Renmin University of ChinaBeijing 100872China Department of Physics Southern University of Science and TechnologyShenzhen 518055China Center for Quantum Physics Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement(MOE)School of PhysicsBeijing Institute of TechnologyBeijing 100081China Shanghai Branch Hefei National LaboratoryShanghai 201315China Collaborative Innovation Center of Advanced Microstructures Nanjing 210093China

V-based kagome superconductors AV_(3)Sb_(5)(A=K,Rb,and Cs)host a charge density wave(CDW)and a topological nontrivial band structure,thereby providing a great platform to study the interplay of superconductivity(SC),CDW,frustration,and ***,we report ultralow-temperature thermal conductivity measurements of CsV_(3)Sb_(5 ) and Ta-doped Cs((V_(0.86)Ta_(0.14)))_(3)Sb_(5) and scanning tunneling microscopy(STM)measurements of CsV_(3)Sb_(5 ).The finite residual linear term of thermal conductivity at zero magnetic field suggests the existence of a residual density of states(DOS)in the superconducting state of CsV_(3)Sb_(5 ).This is supported by the observation of non-zero conductance at zero bias in STM spectrum at an electronic temperature of 90 ***,in Cs(V_(0.86)Ta_(0.14))_(3)Sb_(5),which does not have CDW order,there is no evidence for the residual *** results show the importance of CDW order for the residual DOS,and that a nodal s-wave gap or residual Fermi arc may be the origin of the residual DOS in such an unusual multiband kagome superconductor,CsV_(3)Sb_(5 ).

关键词： thereby conductivity

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Heparin-loaded hierarchical fiber/microsphere scaffolds for anti-inflammatory and promoting wound healing

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Smart Materials in Medicine 2024年第2期5卷 240-250页

作者： Cheng, Kai Deng, Yan Qiu, Lin Song, Shuhang Chen, Lei Wang, LinGe Yu, Qianqian South China Advanced Institute for Soft Matter Science and Technology School of Emergent Soft Matter Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices South China University of Technology Guangzhou510640 China Medical Imaging Center The First Affiliated Hospital Jinan University Guangzhou510630 China

Chronic non-healing wounds induced by oxidative stress and inflammation can activate inflammatory cells and produce large amounts of inflammatory mediators, which fail to maintain homeostasis in the skin and delay the wound-healing process. To tackle this issue, heparin-loaded hierarchical composite scaffolds comprised of electrospun fibers and electrosprayed microspheres were prepared to act as an effective anti-inflammatory wound dressing. Microspheres with different electrosprayed densities were deposited into the surface of the electrospun fibers for the improvement of surface topographical cues and cellular activities. The results indicated that the electrospun fibers followed by electrosprayed for 3 min to fabricate the composite fiber/microsphere scaffolds contributed to the best performance in terms of promoting cellular activities, with no obvious cytotoxicity, good adhesion morphology, and the fastest cell migration rate. In addition, a suitable amount of heparin was added to the composite scaffolds to alleviate inflammation. The significant adsorption efficiency of heparin-loaded composite scaffolds on inflammatory mediator MCP-1 indicates a favorable anti-inflammation effect in vitro. Furthermore, the heparin-loaded hierarchical scaffolds accelerated the pace of inflammatory wound healing in vivo when compared to commercial 3 M Tegaderm and non-heparin-loaded scaffolds. Our work provided a facile strategy for fabricating heparin-loaded hierarchical fiber/microsphere scaffolds to modulate cellular activities via topographical cues and accelerating the inflammatory wound healing process by electrostatic interactions between heparin and MCP-1. These findings suggested that the heparin-loaded hierarchical scaffold was expected to be a promising dressing for inflammatory wound healing. © 2024 The Authors

关键词： Microspheres

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Growth of centimeter scale Nb_(1−x)W_(x)Se_(2) monolayer film by promoter assisted liquid phase chemical vapor deposition

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Nano Research 2022年第3期15卷 2608-2615页

作者： Boxing An Yang Ma Feihong Chu Xuhong Li Yi Wu Congya You Wenjie Deng Songyu Li Yongzhe Zhang Key Laboratory of Advanced Functional Materials Ministry of EducationCollege of Materials Science and EngineeringBeijing University of TechnologyBeijing 100124China Key Laboratory of Optoelectronics Technology of Education Ministry of China Faculty of Information TechnologyBeijing University of TechnologyBeijing 100124China School of Physics Beihang UniversityBeijing 100191China

Two-dimensional(2D)transition-metal dichalcogenide materials(TMDs)alloys have a wide range of applications in the field of optoelectronics due to their capacity to achieve wide modulation of the band gap with fully tunable ***,it is still a challenge for growing alloys with uniform components and large lateral size due to the random distribution of the crystal nucleus ***,we applied a simple but effective promoter assisted liquid phase chemical vapor deposition(CVD)method,in which the quantity ratio of promoter to metal precursor can be controlled precisely,leading to tiny amounts of transition metal oxide precursors deposition onto the substrates in a highly uniform and reproducible manner,which can effectively control the uniform distribution of element components and nucleation *** this method,a series of monolayer Nb_(1−x)W_(x)Se_(2)alloy films with fully tunable compositions and centimeter scale have been successfully synthesized on sapphire *** controllable approach opens a new way to produce large area and uniform 2D alloy film,which has the potential for the construction of optoelectronic devices with tailored spectral responses.

关键词： centimeter scale Nb_(1−x)W_(x)Se_(2) promoter assisted liquid phase chemical vapor deposition

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Manipulating Zr/Ti ratio based on phase diagram for large electrocaloric effects with multiple target operation temperatures in PLZT ceramics

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Journal of advanced Ceramics 2024年第9期13卷 1422-1431页

作者： Junjie Li Ruowei Yin Zhe Xiong Yizheng Bao Xing Zhang Wenjuan Wu Lezhong Li Yang Bai Sichuan Province Key Laboratory of Information Materials and Devices Application College of Optoelectronic Engineeringand Chengdu IC Valley Industrial CollegeChengdu University of Information TechnologyChengdu 610225China Beijing Advanced Innovation Center for Materials Genome Engineering and Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China Chengdu Hongming Electronics Co. Ltd.Chengdu 610199China Key Laboratory of Inorganic Functional Materials and Devices Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 201800China Sichuan Meteorological Optoelectronic Sensor Technology and Application Engineering Research Center Chengdu University of Information TechnologyChengdu 610225China

Ferroelectric phase transition has been identified as a promising avenue for designing high-performanceelectrocaloric materials for zero-emission and solid-state refrigeration. However, extensive research has been limited todeveloping ferroelectric materials with large electrocaloric effects near room temperature, preventing them from meetingdiverse refrigeration requirements. In this study, by leveraging the room-temperature phase diagram of the (PbLa)(ZrTi)O_(3)solution, we prepared a series of Pb_(0.775)La_(0.15)Zr_(x)Ti_(1−x)O_(3) bulk ceramics spanning the ferroelectric and relaxor ferroelectricphase regions. This enabled the attainment of various phase transition features and temperatures. Finally, largeelectrocaloric effects, coupled with adjustable operation temperatures ranging from 150 to −45℃, are successfullyachieved through manipulation of the Zr/Ti ratio. This comprehensive range of operation temperatures effectively addressesdiverse refrigeration application requirements, ranging from industrial equipment to freezer cabinets. This work not onlyunderscores the expansion of the electrocaloric refrigeration application domain but also proposes a material designstrategy tailored to meet these evolving demands.

关键词： electrocaloric effect phase transition phase diagram ferroelectric ceramics

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Graphene aerogel-based vibration sensor with high sensitivity and wide frequency response range

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Nano Research 2023年第8期16卷 11342-11349页

作者： Zibo Wang Zhuojian Xiao Jie Mei Yanchun Wang Xiao Zhang Xiaojun Wei Huaping Liu Sishen Xie Weiya Zhou Beijing National Laboratory for Condensed Matter Physics and Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences and College of Materials Science and Optoelectronic Technology University of Chinese Academy of SciencesBeijing 100049China Songshan Lake Materials Laboratory Dongguan 523808China Beijing Key Laboratory for Advanced Functional Materials and Structure Research Beijing 100190China

Compared with piezoresistive sensors,pressure sensors based on the contact resistance effect are proven to have higher sensitivity and the ability to detect ultra-low pressure,thus attracting extensive research interest in wearable devices and artificial intelligence ***,most studies focus on static or low-frequency pressure detection,and there are few reports on high-frequency dynamic pressure *** by the viscoelasticity of polymers(necessary materials for traditional vibration sensors),the development of vibration sensors with high frequency response remains a great ***,we report a graphene aerogel-based vibration sensor with higher sensitivity and wider frequency response range(2 Hz–10 kHz)than both conventional piezoresistive and similar *** modulating the microscopic morphology and mechanical properties,the super-elastic graphene aerogels suitable for vibration sensing have been prepared ***,the mechanism of the effect of density on the vibration sensor’s sensitivity is studied in *** this basis,the sensitivity,signal fidelity and signal-to-noise ratio of the sensor are further improved by optimizing the structure *** developed sensor exhibits remarkable repeatability,excellent stability,high resolution(0.0039 g)and good linearity(non-linearity error<0.8%)without *** demos,the sensor can not only monitor low-frequency physiological signals and motion of the human body,but also respond to the high-frequency vibrations of rotating *** addition,the sensor can also detect static *** expect the vibration sensor to meet a wider range of functional needs in wearable devices,smart robots,and industrial equipment.

关键词： vibration sensor graphene aerogel high frequency vibration dynamic pressure detection mechanical property

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Time-dependent mechanical behavior of tough hydrogels under multiaxial stretching

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International Journal of Smart and Nano Materials 2023年第4期14卷 460-473页

作者： Yong Liu Yang Chen Jie Zhu Mengze Lu Chuanxia Jiang Zhiwei Fan Taolin Sun South China Advanced Institute for Soft Matter Science and Technology School of Emergent Soft MatterSouth China University of TechnologyGuangzhou China Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices South China University of TechnologyGuangzhouChina Guangdong Marubi Biotechnology Co LtdGuangzhouChina

Understanding the time-dependent mechanical behavior of tough and viscoelastic hydrogels under complex external loading is *** this study,we utilized tough and viscoelastic hydrogels synthesized through the copolymerization of methacrylic acid and methacrylamide as a model system to investigate their mechanical behavior under multiaxial stretching across a wide range of strain *** stretching modes examined were uniaxial,pure shear,and equal biaxial *** findings show that under equal biaxial stretching,the hydrogels exhibit higher mechanical properties and energy dissipation compared to uniaxial and pure shear stretching,owing to the greater contribution of hydrogen bonds to energy dissipation in the former stretching ***,employing the time-elongation separability method during the stretching process,we observed that the relaxation of dynamic hydrogen bonds in the hydrogels only depends on stretching time,independent of the elongation ratio and stretching *** anticipate that this study will yield valuable contributions to the design of durable load-bearing soft materials,particularly in dealing with complex deformation and strain rate responses.

关键词： Hydrogels Viscoelasticity Multiaxial stretching

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Selective electrocatalytic reduction of CO_(2) to formate via carbon-shell-encapsulated In_(2)O_(3) nanoparticles/graphene nanohybrids

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Journal of Materials science & technology 2022年第26期121卷 220-226页

作者： Yidu Wang Jingnan Ding Jun Zhao Jiajun Wang Xiaopeng Han Yida Deng Wenbin Hu Key Laboratory of Advanced Ceramics and Machining Technology(Ministry of Education) Tianjin Key Laboratory of Composite and Functional MaterialsSchool of Materials Science and EngineeringTianjin UniversityTianjin 300072China State Key Laboratory of Marine Resource Utilization in South China Sea School of Materials Science and EngineeringHainan UniversityHaikou 570228China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityFuzhouBinhai New City 350207China

Constructing nanohybrids with a synergistic effect using multi-components and specific micro/nanostructures can significantly enhance their electrocatalytic *** this work,we fabricated an In_(2)O_(3)■NC@GO nanohybrid,in which In_(2)O_(3)nanoparticles(NPs)were encapsulated by an N-doped carbon(NC)shell and supported on *** multi-components in In_(2)O_(3)■NC@GO synergistically optimize the structural and electronic properties of the *** particle size and dispersion of In_(2)O_(3)NPs were optimized owing to the separation effect of the amorphous NC shell and graphene *** separation effect exposes more number of active sites for the electrochemical *** oxygen vacancies exist in In_(2)O_(3),leading to a stronger ability for the adsorption and activation of *** NC shell inhibits the direct contact between the electrolyte and In_(2)O_(3),which significantly suppresses competitive *** charge transfer during the electrocatalysis process is also effectively enhanced due to the carbon *** synergistic effect of multi-components in the In_(2)O_(3)■NC@GO sample results in a significantly improved COreduction reaction performance with a high HCOOFaradic efficiency(FE)of 91.2%and a current density of 40.38 m A cmat–0.8 V obtained using a flow *** present work demonstrates that rationally designing nanohybrids with multifunctional components is an effective strategy for optimizing the structural and electrocatalytic properties of materials for energy conversion.

关键词： In_(2)O_(3) CO_(2)reduction electrocatalyst Oxygen vacancies N-doped carbon Nanohybrids

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Mutual Self‑Regulation of d‑Electrons of Single Atoms and Adjacent Nanoparticles for Bifunctional Oxygen Electrocatalysis and Rechargeable Zinc‑Air Batteries

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Nano-Micro Letters 2023年第4期15卷 40-57页

作者： Sundaram Chandrasekaran Rong Hu Lei Yao Lijun Sui Yongping Liu Amor Abdelkader Yongliang Li Xiangzhong Ren Libo Deng College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060People’s Republic of China College of Chemistry and Bioengineering Guilin University of TechnologyGuilin 541004People’s Republic of China Shenzhen Key Laboratory of Special Functional Materials Shenzhen Engineering Laboratory for Advanced Technology of CeramicsCollege of Materials Science and EngineeringGuangdong Research Center for Interfacial Engineering of Functional MaterialsShenzhen UniversityShenzhen 518060People’s Republic of China Shanghai Key Laboratory for R&D and Application of Metallic Functional Materials Institute of New Energy for VehiclesSchool of Materials Science and EngineeringTongji UniversityShanghai 201804People’s Republic of China Department of Design and Engineering Faculty of Science&TechnologyBournemouth UniversityPoole BH125BBDorsetUK

Rechargeable zinc-air batteries(ZABs)are a promising energy conversion device,which rely critically on electrocatalysts to accelerate their rate-determining reactions such as oxygen reduction(ORR)and oxygen evolution reactions(OER).Herein,we fabricate a range of bifunctional M-N-C(metal-nitrogen-carbon)catalysts containing M-Nx coordination sites and M/MxC nanoparticles(M=Co,Fe,and Cu)using a new class ofγ-cyclodextrin(CD)based metal-organic framework as the *** the two types of active sites interacting with each other in the catalysts,the obtained Fe@C-FeNC and Co@C-CoNC display superior alkaline ORR activity in terms of low half-wave(E1/2)potential(~0.917 and 0.906 V,respectively),which are higher than Cu@C-CuNC(~0.829 V)and the commercial Pt/C(~0.861 V).As a bifunctional electrocatalyst,the Co@C-CoNC exhibits the best performance,showing a bifunctional ORR/OER overpotential(ΔE)of~0.732 V,which is much lower than that of Fe@C-FeNC(~0.831 V)and Cu@C-CuNC(~1.411 V),as well as most of the robust bifunctional electrocatalysts reported to *** X-ray absorption spectroscopy and density functional theory simulations reveal that the strong electronic correlation between metallic Co nanoparticles and the atomic Co-N4 sites in the Co@C-CoNC catalyst can increase the d-electron density near the Fermi level and thus effectively optimize the adsorption/desorption of intermediates in ORR/OER,resulting in an enhanced bifunctional electrocatalytic *** Co@C-CoNC-based rechargeable ZAB exhibited a maximum power density of 162.80 mW cm^(−2) at 270.30 mA cm^(−2),higher than the combination of commercial Pt/C+RuO2(~158.90 mW cm^(−2) at 265.80 mA cm^(−2))*** the galvanostatic discharge at 10 mA cm^(−2),the ZAB delivered an almost stable discharge voltage of 1.2 V for~140 h,signifying the virtue of excellent bifunctional ORR/OER electrocatalytic activity.

关键词： Cyclodextrin CD-MOF Single-atom catalyst ORR/OER Zinc-air battery

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