检索结果-内蒙古大学图书馆

Tumor-Microenvironment-Responsive Biodegradable Nanoagents Based on Lanthanide Nucleotide Self-Assemblies toward Precise Cancer Therapy

引用

Angewandte Chemie 2022年第14期134卷

作者： Yingjie Yang Dr. Yan Liu Prof. Dr. Datao Tu Dr. Mingmao Chen Yunqin Zhang Hang Gao Prof. Dr. Xueyuan Chen CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Key Laboratory of Nanomaterials and State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 China University of Chinese Academy of Sciences Beijing 100049 China College of Biological Science and Engineering Fuzhou University Fuzhou Fujian 350108 China

Stimuli-responsive nanoagents, which simultaneously satisfy normal tissue clearance and tumor-specific responsive treatment, are highly attractive for precise cancer theranostics. Herein, we develop a unique template-induced self-assembly strategy for the exquisitely controlled synthesis of self-assembled lanthanide (Ln 3+ ) nucleotide nanoparticles (LNNPs) with amorphous structure and tunable size from sub-5 nm to 105 nm. By virtue of the low-temperature (10 K) and high-resolution spectroscopy, the local site symmetry of Ln 3+ in LNNPs is unraveled for the first time. The proposed LNNPs are further demonstrated to possess the ability for highly efficient loading and tumor-microenvironment-responsive release of doxorubicin. Particularly, sub-5 nm LNNPs not only exhibit excellent biocompatibility and predominant renal-clearance performance, but also enable efficient tumor retention. These findings reveal the great potential of LNNPs as a new generation of therapeutic platform to overcome the dilemma between efficient therapy and long-term toxicity of nanoagents for future clinical applications.

关键词： Chemotherapy Self-assembly Renal Clearance Site Symmetry Tumor-Microenvironment-Responsive

来源：评论

学校读者我要写书评

暂无评论

Molecular Engineering of Methylated Sulfone-Based Covalent Organic Frameworks for Back-Reaction Inhibited Photocatalytic Overall Water Splitting

引用

Angewandte Chemie 2024年第37期136卷

作者： Xiang Zhang Zhiwei Xiao Lei Jiao Huyue Wu Yan-Xi Tan Jing Lin Daqiang Yuan Yaobing Wang CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of Nanomaterials State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou 350002 Fujian P. R. China Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108 Fujian P. R. China University of Chinese Academy of Sciences Beijing 100049 P. R. China College of Chemistry and Materials Science Fujian Normal University Fuzhou 350007 P. R. China

Solar-to-hydrogen (H 2 ) and oxygen (O 2 ) conversion via photocatalytic overall water splitting (OWS) holds great promise for a sustainable fuel economy, but has been challenged by the backward O 2 reduction reaction (ORR) with favored proton-coupled electron transfer (PCET) dynamics. Here, we report that molecular engineering by methylation inhibits the backward ORR of molecular photocatalysts and enables efficient OWS process. As demonstrated by a benchmark sulfone-based covalent organic framework (COF) photocatalyst, the precise methylation of its O 2 adsorption sites effectively blocks electron transfer and increases the barrier for hydrogen intermediate desorption that cooperatively obstructs the PCET process of ORR. Methylation also repels electrons to the neighboring photocatalytic sulfone group that promotes the forward H 2 evolution. The resultant DS-COF achieves an impressive inhibition of about 70 % of the backward reaction and a three-fold enhancement of the OWS performance with a H 2 evolution rate of 124.7 μmol h −1 g −1 , ranking among the highest reported for organic-based photocatalysts. This work provides insights for engineering photocatalysts at the molecular level for efficient solar-to-fuel conversion.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Investigation of sustainable rare earth recovery on carbon electrodes by electrosorption and precipitation coupling strategy

引用

Journal of Environmental Chemical Engineering 2025年第4期13卷

作者： Yanxin Wang Peilin Lei Yujun Chai Xiaoqi Sun College of Chemistry and Materials Science Hebei Normal University Shijiazhuang Hebei 050024 PR China Xiamen Institute of Rare Earth Materials Haixi Institute Chinese Academy of Sciences Xiamen 361021 PR China Hebei Key Laboratory of Inorganic Nano-materials Hebei Normal University Shijiazhuang Hebei 050024 PR China CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 PR China University of Chinese Academy of Sciences Beijing 100049 PR China

This study investigates the recovery of rare earth (RE) using a coupling electrosorption and precipitation strategy. The electrochemical behavior and recovery properties of various materials, i.e., activated carbon, carbon nanofibers, carbon nanotubes, graphene, and porous carbon, were evaluated. They show the good crystalline, amorphous or the coexistence of two states. The reaction occurred on grapheme and carbon nanofiber within the scan range, but it shows the capacitive behavior for other three. The electrosorption-precipitation coupling capacity and removal efficiency varied due to the cooperation of applied voltage and inner voltage, in addition to the effect of functional groups, defects and conductivity. During the process, rare earth ions were first adsorbed onto the electrode surface and then reacted with OH - ions to form precipitates. Meanwhile, oxygen was generated at the Pt electrode, while only trace amounts of hydrogen were observed on the working electrode due to the involvement of NO 3 - ions. Additionally, La(Ⅲ), Ce(Ⅲ), Pr(Ⅲ) and Nd(Ⅲ) ions were effectively recovered and enriched using carbon-based electrodes, with capacities of 2064.5, 2305.8, 2198.7, and 2288.9 mg·g −1 , respectively, in a 0.01 mol·L −1 RE solution. These findings suggest that the selection of materials with larger specific surface areas, high electrical conductivity, more defects, effective functional groups and low potential can reduce internal voltage, enhance reaction driving forces, and improve recovery efficiency. The recovery process has sustainable RE separation characteristics, with no volatile organic solvent (VOC), acid and alkali consumption, or wastewater.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Porous Single-crystalline Centimeter-sized α-Al2O3Monoliths for Selective and Durable Non-oxidative Dehydrogenation of Ethane

引用

Angewandte Chemie 2023年第4期136卷

作者： Xue Li Wenting Li Jie Zhang Wen Yin Yuanguang Xia Prof. Kui Xie Key Laboratory of Design & Assembly of Functional Nanostructures Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 China Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou Fujian 350108 China Key Laboratory of Optoelectronic Materials Chemistry and Physics Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 China Spallation Neutron Source Science Center Dongguan Guangdong 523803 China

Alpha alumina (α-Al 2 O 3 ) are inert materials with outstanding thermal, chemical and mechanical stability. Herein, we fabricate porous single-crystalline (PSC) α-Al 2 O 3 monoliths at centimeter scale to endow them with high catalytic activity while maintaining their stability. We reduce PSC α-Al 2 O 3 monoliths to create oxygen vacancies in lattice and stabilize them by the ordered lattice to construct unsaturated Al−O coordination structures for enhancing the catalytic activity. The generation of oxygen vacancy at 18e wyckoff position contributes to the unsaturated Al−O coordination. As a case study, we demonstrate the outstanding performance with conversion (≈34 %) and selectivity (≈95 %) toward non-oxidative dehydrogenation of ethane to ethylene at 700 °C. We achieve the outstanding performance without obvious degradation even after a continuous operation over 1000 hours at 700 °C.

关键词： Activity Porous Single Crystal Stability α-Al2O3, Oxygen Vacancy

来源：评论

学校读者我要写书评

暂无评论

Low-temperature Water-gas Shift Reaction Enhanced by Oxygen Vacancies in Pt-loaded Porous Single-crystalline Oxide Monoliths

引用

Angewandte Chemie 2022年第39期134卷

作者： Dr. Shaobo Xi Jie Zhang Prof. Dr. Kui Xie Key Laboratory of Optoelectronic Materials Chemistry and Physics Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 China Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou Fujian 350108 China Key Laboratory of Design & Assembly of Functional Nanostructures Chinese Academy of Sciences Fuzhou Fujian 350002 China

Water-gas shift (WGS) reaction at low temperature plays an important role in hydrogen production from fossil fuels and hydrogen purification for proton-exchange membrane fuel cells. However, the activation of H 2 O is a critical reaction step that greatly limits the overall performance during WGS reaction. Here we fabricate porous single-crystalline (PSC) MoO 3 monoliths at 1 cm scale and deposit atomic-layered Pt clusters at the lattice surface to create the interfacial system toward the low-temperature WGS reaction. The single-crystalline nature stabilizes the oxygen vacancies (V O ) at lattice and facilitates the effective activation of H 2 O at the interface. We show the highest Pt-normalized activity of 0.86 mol CO mol Pt −1 s −1 for the ultra-low temperature WGS reaction at 120 °C. The single-crystalline features with enhanced fluxion in porous architectures lead to outstanding performance without visible degradation even after continuous operation for 100 hours.

关键词： Oxygen Vacancy Porous Single Crystal Pt Clusters Interfaces Water-Gas Shift Reaction

来源：评论

学校读者我要写书评

暂无评论

Fluorinated Polyimide Tunneling Layer for Efficient and Stable Perovskite Photovoltaics

引用

Angewandte Chemie 2024年第21期136卷

作者： Chunming Liu Wei Yu Yuheng Li Can Wang Zilong Zhang Chi Li Lusheng Liang Kangcheng Chen Lin Liu Tinghao Li Xuteng Yu Yao Wang Prof. Peng Gao Institution CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 China Laboratory for Advanced Functional Materials Xiamen Institute of Rare Earth Materials Haixi Institute Chinese Academy of Sciences Xiamen 361021 China Fujian College University of Chinese Academy of Sciences Fuzhou 350002 China University of Chinese Academy of Sciences Beijing 100049 China College of Materials Science and Engineering Beijing Institute of Technology Beijing 100081 China Instrumentation and Service Center for Physical Sciences Westlake University Hangzhou 310024 China

Despite the remarkable progress of perovskite solar cells (PSCs), challenges remain in terms of finding effective and viable strategies to enhance their long-term stability while maintaining high efficiency. In this study, a new insulating and hydrophobic fluorinated polyimide (FPI: 6FDA-6FAPB) was used as the interface layer between the perovskite layer and the hole transport layer (HTL) in PSCs. The functional groups of FPI play a pivotal role in passivating interface defects within the device. Due to its high work function, FPI demonstrates field-effect passivation (FEP) capabilities as an interface layer, effectively mitigating non-radiative recombination at the interface. Notably, the FPI insulating interface layer does not impede carrier transmission at the interface, which is attributed to the presence of hole tunneling effects. The optimized PSCs achieve an outstanding power conversion efficiency (PCE) of 24.61 % and demonstrate excellent stability, showcasing the efficacy of FPI in enhancing device performance and reliability.

关键词： fluorinated polyimide perovskite solar cells tunneling layer field-effect passivation

来源：评论

学校读者我要写书评

暂无评论

A Diode-Like Dye-Cu Anisotropic Junction in a Coordination Polymer as a Logic State Ratchet for Intratumor Redox Photomodulation

引用

Angewandte Chemie 2023年第20期135卷

作者： Dr. Yusheng Shi Dr. Peiyuan Wang Mochen Li Prof. Tiexin Zhang Prof. Gang Han Prof. Chunying Duan State Key Laboratory of Fine Chemicals School of Chemical Engineering Zhang Dayu School of Chemistry Dalian University of Technology 116024 Dalian P. R. China Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Institute of Research on the Structure of Matter Chinese Academy of Science 350002 Fuzhou P. R. China Department of Biochemistry and Molecular Pharmacology University of Massachusetts Medical School 01605 Worcester MA USA

Redox logic materials offer new avenues to modulate intracellular pathologic redox environment area-specifically, but the unambiguity of redox logic states and their unidirectional and repetitive switchability are challenging to realize. By merging a bistable diisophthalic phenazine dye ligand with Cu II salt, a multistable coordination polymer (CP) was constructed, of which the dye-Cu anisotropic junction achieved the diode-like unidirectional electron transfer and logic state ratchet for the first time. Radical cationic CP maintained OFF status with low toxicity in healthy tissues, but was reduced to the neutral SERVO state by the overexpressed glutathione (GSH) in hypoxic tumors. After photoirradiation, the stabilized charge-separated ON status promoted photo-Fenton reaction for reactive oxygen species (ROS) signal transduction, and simultaneously recovered the initial state for catalytic signal amplification of ROS, furnishing intratumor redox photomodulation for therapy.

关键词： Anisotropic Junction Coordination Polymer Electron Transfer Logic Ratchet Redox Photomodulation

来源：评论

学校读者我要写书评

暂无评论

A Perimidin Derivative with Multiple Redox Centers as an Anode for Lithium-ion Batteries①

引用

结构化学 2020年第2期

作者： FUYu-Ru LIUQin SUNChuan-Fu CAS Key Laboratory of Design and Assembly of Functional Nanostructures，and Fujian Key Laboratory of Nanomaterials，Fujian Institute of Research on the Structure of Matter，Chinese Academy of Sciences，Fuzhou 350002，China University of Chinese Academy of Sciences，Beijing 100039，China

来源：评论

学校读者我要写书评

暂无评论

Dual-Band-Tunable White-Light Emission from Bi3+/Te4+Emitters in Perovskite-Derivative Cs2SnCl6Microcrystals

引用

Angewandte Chemie 2022年第9期134卷

作者： Wei Zhang Prof. Wei Zheng Dr. Lingyun Li Prof. Ping Huang Dr. Zhongliang Gong Ziwei Zhou Jinyue Sun Prof. Yan Yu Prof. Xueyuan Chen CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Key Laboratory of Nanomaterials State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 China Key Laboratory of Advanced Materials Technologies College of Materials Science and Engineering Fuzhou University Fuzhou Fujian 350108 China Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou Fujian 350108 China

Luminescent metal halides have attracted considerable attention in next-generation solid-state lighting because of their superior optical properties and easy solution processibility. Herein, we report a new class of highly efficient and dual-band-tunable white-light emitters based on Bi 3+ /Te 4+ co-doped perovskite derivative Cs 2 SnCl 6 microcrystals. Owing to the strong electron-phonon coupling and efficient energy transfer from Bi 3+ to Te 4+ , the microcrystals exhibited broad dual-band white-light emission originating from the inter-configurational 3 P 0,1 → 1 S 0 transitions of Bi 3+ and Te 4+ , with good stability and a high photoluminescence (PL) quantum yield of up to 68.3 %. Specifically, a remarkable transition in Bi 3+ -PL lifetime from milliseconds at 10 K to microseconds at 300 K was observed, as solid evidence for the isolated Bi 3+ emission. These findings provide not only new insights into the excited-state dynamics of Bi 3+ and Te 4+ in Cs 2 SnCl 6 , but also a general approach to achieve single-composition white-light emitters based on lead-free metal halides through ns 2 -metal ion co-doping.

关键词： Bismuth Cs2SnCl6 Excited-State Dynamics Tellurium White-Light Emission

来源：评论

学校读者我要写书评

暂无评论

Efficient CO_2 Electrolysis with Fluorite Structure Nanoparticles Modified Perovskite Structure La_(0.75)Sr_(0.25)Cr_(0.5)Mn_(0.5)O_(3-δ) Cathode

引用

Chinese Journal of Structural Chemistry 2018年第10期37卷 1596-1602页

作者： WANG Wen-Yuan HOU Shi-Sheng HU Xiu-Lia XIE Kui CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China College of Chemistry and Materials Science Fujian Normal UniversityFuzhou 350007China

Perovskite structure La_（0.75）Sr_（0.25）Cr_（0.5）Mn_（0.5）O_（3-δ）（LSCM） cathode with unique structure can electrolyze CO_2 to CO in solid oxide electrolysers（SOEs）.However,the cell performance is restricted by its electro-catalysis *** this work,fluorite structure nanoparticles（CeO_（2-δ）） are impregnated on LSCM cathode to improve the electro-catalysis activity.X-ray diffraction（XRD）,scanning electron microscope（SEM） and X-ray photoelectron spectroscopy（XPS） together approve that the fluorite structure nanoparticles are uniformly distributed on the perovskite structure LSCM *** measurements illustrate that direct CO_2 electrolysis with 10%mol CeO_（2-δ） impregnated LSCM cathode exhibits excellent performance for current density（0.5 A×cm^（-2）） and current efficiency（～95%） at 800 ℃ under 1.6 *** is believed that the enhanced performance of directed CO_2 electrolysis may be due to the synergetic effect of fluorite structure CeO_（2-δ） nanoparticles and perovskite structure LSCM ceramic electrode.

关键词： perovskite structure fluorite structure LSCM solid oxide electrolysers impregnation

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：