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Hydrogen radical-based prodrug photoactivation by modulating bond dissociation energy of a phenolic photosensitizer

science China Chemistry 2025年

作者： Jian Sun Jinlei Peng Junwei Zhou Xiaoran Zhang Chuanwei Zhu Rong Wang Fude Feng Shu Wang Key Laboratory of High Performance Polymer Material and Technology of Ministry of Education Department of Polymer Science & EngineeringSchool of Chemistry & Chemical EngineeringNanjing University Beijing National Laboratory for Molecular Sciences Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of Sciences State Key Laboratory of Coordination Chemistry Jiangsu Key Laboratory of Advanced Organic MaterialsChemistry and Biomedicine Innovation CenterSchool of Chemistry and Chemical EngineeringNanjing University

Phenols are extremely difficult to release the hydrogen radical （H·） due to the disfavored O–H bond dissociation energy（BDE） and undergo O–H homolysis under strong ultraviolet-C （UVC） *** this work,we provided a method to modulate the O–H BDE of phenols byπ-conjugation to electron-donating *** on a phenol-cored photosensitizer（BTP-1） revealed drastic declines of O–H BDE (80.5 vs.28.1 kcal mol-1) by comparing the ground state （S0） and triplet excited state （T1）.Consequently,BTP-1 was sensitive to visible light and generated H·after O–H *** glutathione （GSH）serving as an ultimate H·*donor,the BTP-1-based photosystem was efficient in catalyzing H·generation under physiological *** kind of hydrogen atom-based photochemistry is distinct from traditional type I/II photosensitizing pathways that are electron or energy *** applied the photosystem to solve the obstacle in hypoxia-activated prodrugs （HAPs）that face a dilemma with the heterogeneously hypoxic level of *** vitro studies demonstrated that the photosystem boosted the chemotherapy performance of TH-302 （a representative HAP） under moderate *** the capability to target redox bonds in HAPs and good compatibility with near-infrared two-photon laser,the photosystem is promising for cancer precision therapy.

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Fused-ring induced end-on orientation in conjugated molecular dyads toward efficient single-component organic solar cells

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Aggregate 2023年第2期4卷 291-299页

作者： Dongdong Xia Shengxi Zhou Wen Liang Tan Safakath Karuthedath Chengyi Xiao Chaowei Zhao Frédéric Laquai Christopher R.McNeill Weiwei Li Institute of Applied Chemistry Jiangxi Academy of SciencesNanchangChina Beijing Advanced Innovation Center for Soft Matter Science and Engineering&State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijingChina Department of Materials Science and Engineering Monash UniversityClaytonAustralia KAUST Solar Center(KSC) Physical Sciences and Engineering Division(PSE)Material Science and Engineering Program(MSE)King Abdullah University of Science and Technology(KAUST)ThuwalSaudi Arabia

The molecular orientations of conjugated materials on the substrate mainly include edge-on,face-on,and ***-on and face-on orientations have been widely observed,while end-on orientation has been rarely *** in organic solar cells(OSCs)charge transport is along the vertical direction,end-on orientation with conjugated backbones perpendicular to the substrate is recognized as the ideal microstructure for *** this work,we for the first time obtained the preferential end-on orientation in a conjugated molecular dyad that contains a conjugated backbone as donor and perylene bisimide side units as *** was realized by introducing a fused-ring structure to replace linear terthiophenes with conjugated backbones,yielding F-MDPBI and L-MDPBI ***,a shifting trend of the molecular orientation from dominating edge-on in L-MDPBI to preferential end-on in F-MDPBI was *** a consequence,vertical charge carrier mobilities in F-MDPBI are one order of magnitude higher than those with preferential edge-on orientation,so single-component OSCs based on this molecular dyad as a single photoactive layer provided a power conversion efficiency of 4.89% compared to 1.70% based on L-MDPBI with preferential edge-on orientation.

关键词： conjugated molecular dyads crystallinity edge-on end-on single-component organic solar cells

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Effects of nano-metakaolin on the enhanced properties and microstructure development of natural hydraulic lime

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Chinese chemical Letters 2025年第4期36卷 516-521页

作者： Zirui Zhu Peng Liu Jinhua Wang Hongbin Zhang Wei Luo Institute for Preservation and Conservation of Chinese Ancient Books Fudan University LibraryFudan UniversityShanghai 200433China Department of cultural heritage and museology Fudan UniversityShanghai 200433China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringInstitute of Functional MaterialsDonghua UniversityShanghai 201620China

Natural hydraulic lime(NHL) has garnered increasing attention for its sustainable and suitable performance in the field of historical building restoration. However, the prolonged hardening time and sluggish hydration rate of NHL infiuence the workability, strength development, and durability of construction structures in which it is used. In this study, nano-metakaolin(NMK) was applied as a highly reactive supplementary cementitious material(SCM) for NHL-based mortars to enhance their properties with various ratios. Meanwhile, the effects of NMK and its related enhancement mechanism on the physical properties and chemical structures of NHL composites were systematically investigated, mainly involving the modifications in their microstructure, chemical composition, and C-S-H structure. Results demonstrated that NMK-modified samples showed distinct and superior properties to pure NHL sample, such as shorter initial/final setting times(15.1%–49.1%, 27.1%–50.0%), and higher compactness(67.8%–81.4%, 38.1%–44.8%),lower shrinkage(25.0%–56.3%, 12.5%–25.0%), enhanced compressive strength(404.5%–546.0%, 180.8%–354.1%) and fiexural strength(227.5%–351.1%, 59.9%–125.7%) for both early and late curing times(7 and28 days). The inclusion of NMK not only acts as a fine filler, but also promotes NHL's hydrate rate by its super high pozzolanic activity, thus optimizing the pore structures and increasing the content and the average silicate chain length of hydration gel in NHL. Overall, this study can contribute to a deeper understanding of the enhancement mechanism of NMK on the physical properties and chemical structures of NHL from a meso/microscopic perspective, with a view to broadening NHL's potential applications.

关键词： Natural hydraulic lime Nano-metakaolin Pozzolanic reaction Properties Microstructures

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介电聚合物用于新型能源应用

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science Bulletin 2023年第14期68卷 1478-1483页

作者：陈杰黄兴溢 Department of Polymer Science and Engineering Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing School of Chemistry and Chemical Engineering Shanghai Jiao Tong University Department of Electrical Engineering Shanghai Jiao Tong University

Dielectric materials are electrical insulators that have the ability to become polarized when an electric field is applied to *** conductors and semiconductors,they do not allow electronic charges to flow freely;they slightly shift the charges from their average equilibrium positions during dielectric *** polarization behavior of dielectric materials allows them to store and release electrical energy rapidly,which makes them essential for various applications in electronic and electrical power systems,such as energy harvesting,power conditioning,and power factor correction[1].All-organic dielectric polymers are an attractive alternative to ceramic dielectric materials owing to their breakdown strength,which can be more than one order of magnitude greater than that of ceramics(dielectric ceramics are more suitable for ultrahigh-frequency and high-temperature applications).Additionally,they have a unique failure mechanism that allows for the continuous operation at high electric fields,known as a‘‘graceful failure”[2].Furthermore,dielectric polymers are lightweight,have low density,and are excellently processable,rendering them highly suitable for the large-scale production at a low cost.

关键词： ceramics ceramic dielectric

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The Indoor People Tracking and Counting System

The Indoor People Tracking and Counting System

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2023 International Automatic Control Conference, CACS 2023

作者： Lin, Hao-Pu Han, Chin-Chuan Liao, Jun-Wei Ciou, Chong-Han Hong, Yi-Cheng Tan, Ming-Lun National United University Ph. D. Program in Material and Chemical Engineering MiaoLi Taiwan National United University Department of Computer Science and Information Engineering MiaoLi Taiwan

ISBN: (纸本)9798350306354

COVID-19 outbreaks and becomes serious from 2019 winter. Taking body temperature, wearing masks, recording footprint and avoiding crowds become important tasks and require a lot of manpower support for the prevention of the epidemic in every. In this study, we have integrated the infrared thermometer devices to measure people temperature and the people identities through RGB images at the entrance of buildings. Using the computer vision and deep learning methods, we would like to build a 24/7 and region-wide coverage assistance system to automatically record the footprint of a specific people in the building. We also detect if people taking off their masks in the yard at any time. The processing videos are grabbed from the existing CCTV systems. The developed system also locates the crowd and calculate the number of people in a specified area, and the manager can know the number of people and control the access in real time. It will reduce the burden of manpower. In addition, we have optimized the system performance to handle multiple camera videos and to reduce the hardware cost at the same time. © 2023 IEEE.

关键词： Access control

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Combustion Profile of Bio-pellet Produced from Sawdust Using Wet Torrefaction Method with Various Concentrations of Acetic Acid 4

Combustion Profile of Bio-pellet Produced from Sawdust Using...

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4th International Symposium on Advances and Innovation in Mechanical engineering, ISAIME 2023

作者： Pertiwi, Indah Ayu Muhammad Abubakar Setiawan, Adi Iskandar, Rizky Magister Program in Renewable Energy Engineering Faculty of Engineering Universitas Malikusssaleh Jalan Batam Bukit Indah Lhokseumawe24352 Indonesia Chemical Engineering Department Faculty of Engineering Universitas Malikussaleh Kampus Bukit Indah Muara Satu Lhokseumawe24352 Indonesia Mechanical Engineering Vocational Education Study Program Faculty of Teaching and Educational Science Universitas Malikussaleh Cot Teungku Nie Reuleut Muara Batu Aceh Utara24355 Indonesia Mechanical Engineering Department Faculty of Engineering Universitas Malikusssaleh Jalan Batam Bukit Indah Lhokseumawe24352 Indonesia

Sawdust is one of the industrial wastes which naturally contains low energy density. An effective method is needed to utilize this biomass as a solid fuel product. This work aimed to investigate the physical and combustion properties of bio-pellets produced from sawdust under the wet torrefaction method. To prepare sawdust bio-pellet a number of steps were carried out including the wet torrefaction process, dough preparation, pelletizing, and drying. Wet torrefaction was performed by hydrothermally treating the sample in an autoclave at a temperature of 130°C and pressure of 2 atm (g) for 80 minutes. For the hydrothermal process, the used acetic acid solution was varied with variations of 1.3 M, 1.8 M, and 2.3 M. Properties of the product were analyzed under proximate and bomb calorimetry analyses. To evaluate the combustion properties a purposely built test apparatus was developed equipped with a data logger system. Based on the results it can be observed that increases in torrefaction temperature and acetic acid concentration resulted in an increase in the calorific value as well as decreases in the ash content. The highest calorific value was 4745 kcal/kg obtained from sawdust torrefied in acetic acid with a concentration of 2.3 M at a temperature of 130?. This sample also exhibits the lowest ash content which is only 1.97%. The combustion test disclosed a maximum combustion temperature of 589? with a burning rate of 0.711 g/min. Overall, the wet torrefaction applied in this investigation was beneficially enhanced the properties of bio-pellet products. © 2025 Institute of Physics Publishing. All rights reserved.

关键词： Sawdust

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Monodomain Liquid Crystals of Two-Dimensional Sheets by Boundary-Free Sheargraphy

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Nano-Micro Letters 2022年第12期14卷 14-26页

作者： Min Cao Senping Liu Qingli Zhu Ya Wang Jingyu Ma Zeshen Li Dan Chang Enhui Zhu Xin Ming Yingjun Liu Yanqiu Jiang Zhen Xu Chao Gao MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringKey Laboratory of Adsorption and Separation Materials and Technologies of Zhejiang ProvinceZhejiang University38 Zheda RoadHangzhou 310027People’s Republic of China Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering TaiyuanPeople’s Republic of China State Key Lab of Chemical Engineering College of Chemical and Biological EngineeringZhejiang University38 Zheda RoadHangzhou 310027People’s Republic of China

Eliminating topological defects to achieve monodomain liquid crystals is highly significant for the fundamental studies of soft matter and building long-range ordered ***,liquid crystals are metastable and sensitive to external stimuli,such as flow,confinement,and electromagnetic fields,which cause their intrinsic polycrystallinity and topological ***,we achieve the monodomain liquid crystals of graphene oxide over 30 cm through boundary-free *** obtained monodomain liquid crystals exhibit large-area uniform alignment of sheets,which has the same optical polarized angle and *** monodomain liquid crystals provide bidirectionally ordered skeletons,which can be applied as lightweight thermal management materials with bidirectionally high thermal and electrical ***,we extend the controllable topology of two-dimensional colloids by introducing singularities and disclinations in monodomain liquid *** structures with defect strength from−2 to+2 were *** work provides a facile methodology to study the structural order of soft matter at a macroscopic level,facilitating the fabrication of metamaterials with tunable and highly anisotropic architectures.

关键词： Monodomain Liquid crystals Graphene oxide Boundary-free sheargraphy Topological structure

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An Anti-Plasma Etching Film of Y2O3 Film 10

An Anti-Plasma Etching Film of Y2O3 Film

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10th International Conference on Applied System Innovation, ICASI 2024

作者： Wei, Chia-Chih Chen, Hsuan-Jung Lee, Yi-Mu Chang, Shao-Fu Chen, Chien-Chon College of Engineering and Science Ph.D. Program in Materials and Chemical Engineering National United University Miaoli Taiwan Michigan State University Department of Chemistry MI48824 United States National United University Department of Electronic Miaoli Taiwan National United University Department of Energy Engineering Miaoli Taiwan

ISBN: (纸本)9798350394924

In this paper, we have presented our experiment results including (a) use a slowly thermal spray process deposition an yttrium oxide (Y2O3) film with thickness of $200\ \mu\mathrm{m}$ on the aluminum alloy (AA6061). The image analysis showed that the porosity of Y2O3 film can be reduced to less than 2%. The further aerosol deposition can be used filling the pores and can reduce the porosity of the film to less than 0.5%. This low-porosity Y2O3 film will be able to meet the increasingly stringent requirements for surface coating protection of semiconductor vacuum chamber. (b) Compared the corrosion characterization in 3.5 wt. % NaCl solution between naked AA6061 and AA6061 with Y2O3 coating, a high corrosion reactivity ($\mathrm{I}_{\text{corr}}=10^{-3.3}\mathrm{A}/\text{cm}^{2}$) of naked AA6061 then AA6061 with Y2O3 coating ($\mathrm{I}_{\text{corr}}=10^{-5.8}\mathrm{A}/\text{cm}^{2}$). The corrosion reactivity of AA6061 with Y2O3 is reduced by 316 times to a naked AA6061. © 2024 IEEE.

关键词： Porosity

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Enhanced resistive switching properties of HfAlOx/ZrO2- based RRAM devices

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Progress in Natural science:Materials International 2022年第5期32卷 602-607页

作者： P.R.Sekhar Reddy Venkata Raveendra Nallagatla Yedluri Anil Kumar G.Murali School of Material Science and Engineering Pusan National University Department of Physics and Oxide Research Centre Memory and Catalyst Research Center Hankuk University of Foreign Studies Materials Center Leoben Forschung GmbH Department of Physics United Arab Emirates University Department of Polymer Science and Engineering Department of IT-Energy Convergence (BK21 FOUR) Chemical Industry Institute Korea National University of Transportation

Resistive Random-Access Memory（RRAM） devices are recognized as potential candidates for next-generation memory devices, due to their smallest cell size, high write/erase speed, and endurance. Particularly, the resistive switching（RS） characteristics in oxide materials have offered new opportunities for developing CMOScompatible high-density RRAM devices. In this study, the RS behavior of HfAlOx/ZrO2thin films sandwiched structure between TiN bottom electrode and Au top electrodes were investigated. It was found that Au/HfAlOx/ZrO2/TiN stacks were superior in terms of RS performance when compare to Au/HfAlOx/TiN memory stacks. The devices demonstrated a good resistance ratio of high resistance state and low resistance state ～103 for Au/HfAlOx/TiN and ～105 for Au/HfAlOx/ZrO2/TiN stacks, respectively. Both stacks showed good retention characteristics（>104s） and endurance（>103cycles）. The experimental current-voltage characteristics fitted with different conducting mechanisms, the linear lower bias region is dominated by ohmic conductivity, whereas the non-linear higher bias region was dominated by space-charge limited current conduction mechanism.

关键词： Nonvolatile memory RRAM Resistive switching mechanism Atomic layer deposition Current conduction mechanism

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Construction of Ultrathin Layered MXene-TiN Heterostructure Enabling Favorable Catalytic Ability for High-Areal-Capacity Lithium-Sulfur Batteries

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Nano-Micro Letters 2022年第11期14卷 324-340页

作者： Hao Wang Zhe Cui Shu-Ang He Jinqi Zhu Wei Luo Qian Liu Rujia Zou State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620People’s Republic of China Department of Physics College of ScienceDonghua UniversityShanghai 201620People’s Republic of China

Catalysis has been regarded as an effective strategy to mitigate sluggish reaction kinetics and serious shuttle effect of Li-S ***,a spherical structure consists of ultrathin layered Ti_(3)C_(2)T_(x)-TiN heterostructures(MX-TiN)through in-situ nitridation method is *** controllable nitridation,highly conductive TiN layer grew on the surface and close coupled with interior MXene to form unique 2D *** ultrathin heterostructure with only several nanometers in thickness enables outstanding ability to shorten electrons diffusion distance during electrochemical reactions and enlarge active surface with abundant adsorptive and catalytic ***,the(001)surface of TiN is dominated by metallic Ti-3d states,which ensures fast transmitting electrons from high conductive MX-TiN matrix and thus guarantees efficient catalytic *** and experiments demonstrate that polysulfides are strongly immobilized on MX-TiN,meanwhile the bidirectional reaction kinetics are catalytically enhanced by reducing the conversion barrier between liquid LiPSs and solid Li_(2)S_(2)/Li_(2)*** a result,the S/MX-TiN cathode achieves excellent long-term cyclability with extremely low-capacity fading rate of 0.022%over 1000 cycles and remarkable areal capacity of 8.27 mAh cm^(−2) at high sulfur loading and lean electrolytes.

关键词： Li-S batteries Ultrathin 2D structures Electrochemical catalysis MXenes Ti_(3)C_(2)T_(x)-TiN

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