检索结果-内蒙古大学图书馆

SSRN 2025年

作者： Luo, Hongyao Jing, Haochuan Zhang, Bing Yang, Nailiang Sun, Tao Qiu, Chuntian Xu, Yangsen Wan, Yanfen Ling, Xiang Yang, Peng Shenzhen University China Yunnan University China Yunnan Key laboratory for Micro/nano Materials & Technology The School of Materials Science and Engineering Yunnan University Kunming650000 China Shenzhen Key Laboratory of 2D Metamaterials for Information Technology International Collaborative Laboratory of 2D Materials for Optoelectronic Science & Technology Institute of Microscale Optoelectronics Shenzhen University Shenzhen518060 China Institute of Technology for Future Industry Shenzhen Institute of Information Technology Guangdong Shenzhen518172 China ZJU-Hangzhou Global Scientific and Technological Innovation Center Zhejiang University Hangzhou310027 China State Key Laboratory of Biochemical Engineering Key Laboratory of Biopharmaceutical Preparation and Delivery Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China School of Chemical Engineering Xi'an Key Laboratory of Special Energy Materials Northwest University Xi’an710069 China

The semi-hydrogenation of alkynes to alkenes is of great significance in industrial production of pharmaceutical and fine chemicals. Electrochemical semi-hydrogenation (ECSH) has emerged as a promising alternative to conventional thermochemical hydrogenation. However, its practical application is hindered by low reaction rate and competing hydrogen evolution reaction (HER). In this work, the controllable incorporation of sulfur into the lattice of Pd nanostructures is proposed to develop disordered and electron-deficient Pd-based nanosheets on Ni foam and enhance their ECSH performance of alkynes. Mechanistic investigations demonstrate that the electronic and geometric structures of Pd sites are optimized by lattice sulfur, which tunes the competitive adsorption of H* and alkynes, inherently inhibits the H* coupling and weakens alkene adsorption, thereby promotes the semi-hydrogenation of alkynes and prevents the over-hydrogenation of alkenes. The optimized Pd-based nanosheets achieve exceptional performance with 97% alkene selectivity, 94% Faradaic efficiency, and a reaction rate of 303.7 μmol mg⁻1 catal. h⁻1 using 4-methoxyphenylacetylene as the model substrate. The potential- and time-independent selectivity, good substrate universality with excellent tolerance to active groups (C-Br/Cl/C=O, etc.) and gram-scale synthesis of 4-methoxystyrene further highlight the potential of this strategy for advanced catalysts design and green chemistry. © 2025, The Authors. All rights reserved.

关键词： Nanosheets

来源：评论

学校读者我要写书评

暂无评论

Volatolomics-based quality identification of Lycium barbarum using cMOF thin film chemiresistors

引用

Chinese Journal of Structural Chemistry 2025年第5期44卷

作者： Lin-An Cao Yi-Qian Li Lu Sun Sai Chu Yun-Fei Huo Xiao-Qin Li Jia-Hui Guo Fang-Li Yuan Kenichi Otake Dai-Lian Wang Ming-Shui Yao Ningxia Key Laboratory of Green Catalytic Materials and Technology College of Chemistry and Chemical Engineering Ningxia Normal University Guyuan 756000 China State Key Laboratory of Mesoscience and Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China School of Chemical Engineering University of Chinese Academy of Sciences Beijing 100049 China Institute for Integrated Cell-Material Sciences Kyoto University Institute for Advanced Study Kyoto University Yoshida Ushinomiya-cho Sakyo-ku Kyoto 606-8501 Japan

The sulfur-fumigation process not only induces the chemical transformation of Lycium barbarum (Lb, a widely used traditional Chinese medicine) but also severely influences human health. Given the existing challenges like the complex and time-consuming operation, as well as the high technical demands of the current detection methods for sulfur-fumed Lycium barbarum (SF-Lb), this paper employs a simple chemiresistor to carry out discrimination research between Lb and SF-Lb which have significant differences in volatolomics. The sensor is constructed by a conductive metal-organic framework (cMOF) thin film, Cu 3 (HHTP) 2 , due to its abundant active sites, excellent electron transfer performance as well as the capacity to detect specific groups of volatile organic compounds (VOCs). Consequently, the response values of Cu 3 (HHTP) 2 -based sensor to 0.5 g SF-Lb (151.74%) are significantly higher than those to normal Lb (80.07%), identifying SF-Lb simply and rapidly with an accuracy of ∼100%. Our work investigates volatolomics of SF-Lb and establishes a new rapid discrimination method for sulfur-fumed traditional Chinese herbs.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Toxicity evaluation of geniposide on MCF-7 cancer cells

引用

MCB Molecular and Cellular Biomechanics 2020年第4期17卷 199-204页

作者： Lv, Kena Zheng, Shuangshuang Li, Xiangqin Nie, Yi Liu, Tianqing Song, Kedong State Key Laboratory of Fine Chemicals Dalian R&D Center for Stem Cell and Tissue Engineering Dalian University of Technology Dalian116024 China Zhengzhou Institute of Emerging Industrial Technology Zhengzhou450000 China Key Laboratory of Green Process and Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China

As one of the adjuvant treatments for cancer treatment, traditional Chinese medicine treatment has a wide range of cancer treatments, such as preventing metastasis and relapse, improving the efficacy of radiotherapy and chemotherapy, reducing the side effects of chemotherapy, improving body function, extending life and improving the life quality. Geniposide (GEN) is a bioactive substance extracted from the fruit of gardenia. In recent years, it has attracted attention due to its anti-tumor effect. In this study, we aimed to investigate whether GEN could inhibit the proliferation of human breast cancer cells (MCF-7) and promote its apoptosis. The half-inhibitory concentration (IC50) values of GEN were firstly determined as 16.06, 14.85 and 13.14 mg/mL by the CCK-8 experiment after cells treated for 24 h, 48 h, and 72 h, respectively. The inhibitory effect of GEN on MCF-7 cells was in concentration- and time-dependent manners from the results of CCK-8 experiment and Live/Dead staining. AO/EB staining result has shown that GEN has induced MCF-7 cell apoptosis. © 2020 Tech Science Press. All rights reserved.

关键词： Chemotherapy

来源：评论

学校读者我要写书评

暂无评论

Evaluating the Inhalation Bioaccessibility of Traffic-Impacted Particulate Matter-Bound Pahs in a Road Tunnel by Simulated Lung Fluids

SSRN

引用

SSRN 2022年

作者： Shi, Fengqiong Ju, Jingxue Zhang, Xian Zheng, Ronggang Xiong, Feng Liu, Jingfu State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing100085 China Institute of Process Engineering Innovation Academy for Green Manufacture Chinese Academy of Sciences Beijing100190 China College of Public Health Hebei University Baoding071002 China JiangXi Gannan Highway Survey and Design Institute Ganzhou341000 China

Polycyclic aromatic hydrocarbons (PAHs) are the most highly concerned pollutants bound on traffic-impacted particulate matter (TIPM). The inhaled TIPM-bound PAHs risk has attracted much attention, whereas the inhalation bioaccessibility, a method to refine the exposure risk assessment, has not yet been extensively introduced in the exposure risk assessment. Thus, in vitro assays using artificial lung fluids including artificial lysosomal fluid (ALF), Gamble’s solution (GS), and modified GS (MGS) were conducted to assess the inhalation bioaccessibility of PAHs in TIPM collected from an expressway tunnel. Also, the influence factors of PAHs’ inhalation bioaccessibility were explored. Finally, the exposure risk of TIPM-bound PAHs was estimated based on inhalation bioaccessibility. Results showed that the average PAHs concentrations were 30.5 ± 12.9 ng/m3, 36.2 ± 5.19 ng/m3, and 39.9 ± 4.31 ng/m3 in the tunnel inlet PM2.5, TSP, and tunnel center PM2.5, respectively. Phe, Flt, Pyr, Nap, Chr, BbF, and BkF were found as the dominant species in TSP and PM2.5, suggesting PAHs in the studied tunnel were mainly derived from diesel-fueled vehicular emissions. The bioaccessible fraction measured for different PAH species were highly variable, with ranges of 0.88 (IcdP) – 90.4% (NaP), 0.75 (Pyr) – 55.8% (Nap) and 0 (IcdP) – 82.2% (Ace) for the tunnel inlet PM2.5, TSP and center PM2.5, respectively. The bioaccessible fractions measured for PAHs in tunnel PM2.5 and TSP were also highly variable, which can be attributed to the heterogeneity, size, and composition of TIPM. The incremental lifetime carcinogenic risk (ILCR) of tunnel inlet PM2.5-bound PAHs evaluated according to their total mass concentration exceeded the threshold (1.0×10-6) set by the USEPA, whereas the ILCRs estimated based on the inhalation bioaccessibility were far below the threshold. Hence, it is vitally important to take into consideration of pollutant’s bioaccessibility to refine health risk assessment. © 2022

关键词： Polycyclic aromatic hydrocarbons

来源：评论

学校读者我要写书评

暂无评论

Theoretical evidence for new adsorption sites of CO2 on the Ag electrode surface

arXiv

引用

arXiv 2020年

作者： Guo, Shuai Li, Yao Liu, Lei Zhang, Xiangping Zhang, Suojiang CAS Key Laboratory of Green Process and Engineering State Key Laboratory of Multiphase Complex Systems Beijing Key Laboratory of Ionic Liquids Clean Process Institute of Process Engineering Chinese Academy of Sciences Beijing100190 China School of Future Technology University of Chinese Academy of Sciences Beijing100049 China Dalian National Laboratory for Clean Energy Dalian116023 China

Nowadays, electrochemical reduction of CO2 has been considered as an effective method to solve the problem of global warming. The primary challenge in studying the mechanism is to determine the adsorption states of CO2, since complicated metal surfaces often result in many different adsorption sites. Based on the density functional theory (DFT) calculations, we performed a theoretical study on the adsorption of CO2 on the Ag electrode surface. The results show that the adsorption populations of CO2 are extremely sensitive to the adsorption sites. Importantly, we found that the preferable adsorption positions are the terrace sites, rather than the previous reported step sites. The adsorption populations were found with the order of (211) > (110) > (111) > (100). Subsequently, the adsorption characteristics were correlated with the d-band theory and the charge transfers between Ag surfaces and CO2. Copyright © 2020, The Authors. All rights reserved.

关键词： Density functional theory

来源：评论

学校读者我要写书评

暂无评论

Switching Reaction Pathways of CO2Electroreduction by Modulating Cations in the Electrochemical Double Layer

引用

Angewandte Chemie 2024年第39期136卷

作者： Jiahao Yang Jiapeng Jiao Shiqiang Liu Yaoyu Yin Yingying Cheng Yiyong Wang Meng Zhou Wenling Zhao Xing Tong Lihong Jing Pei Zhang Xiaofu Sun Qinggong Zhu Xinchen Kang Buxing Han Beijing National Laboratory for Molecular Sciences CAS Laboratory of Colloid and Interface and Thermodynamics CAS Research/Education Center for Excellence in Molecular Sciences Center for Carbon Neutral Chemistry Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China School of Chemistry and Chemical Engineering University of Chinese Academy of Sciences Beijing 100049 China Shanghai Key Laboratory of Green Chemistry and Chemical Processes State Key Laboratory of Petroleum Molecular & Process Engineering School of Chemistry and Molecular Engineering East China Normal University Shanghai 200062 China

Tuning the selectivity of CO 2 electroreduction reaction (CO 2 RR) solely by changing electrolyte is a very attractive topic. In this study, we conducted CO 2 RR in different aqueous electrolytes over bulk metal electrodes. It was discovered that controlled CO 2 RR could be achieved by modulating cations in the electrochemical double layer. Specifically, ionic liquid cations in the electrolyte significantly inhibits the hydrogen evolution reaction (HER), while yielding high Faraday efficiencies toward CO (FE CO ) or formate (FE formate ) depending on the alkali metal cations. For example, the product could be switched from CO (FE CO =97.3 %) to formate (FE formate =93.5 %) by changing the electrolyte from 0.1 M KBr-0.5 M 1-octyl-3-methylimidazolium bromide (OmimBr) to 0.1 M CsBr-0.5 M OmimBr aqueous solutions over pristine Cu foil electrode. In situ spectroscopy and theoretical calculations reveal that the ordered structure generated by the assembly of Omim + under an applied negative potential alters the hydrogen bonding structure of the interfacial water, thereby inhibiting the HER. The difference in selectivity in the presence of different cations is attributed to the hydrogen bonding effect caused by Omim + , which alters the solvated structure of the alkali metal cations and thus affects the stabilization of intermediates of different pathways.

关键词： CO2RR Electrochemical Double Layer Ionic Liquid Electrolyte Tunable Pathway

来源：评论

学校读者我要写书评

暂无评论

Development of luminescent metallohelicate as a selective chloride transporter

引用

Chinese Chemical Letters 2025年

作者： Xinyu Hu Bo Song Shukai Song Qinghui Ling Bangkun Yue Lianrui Hu Feifei Wang Li He Lin Xu Key Laboratory of Micro-Nano Optoelectronic Devices (Wenzhou) College of Electrical and Electronic Engineering Wenzhou University Wenzhou 325035 China State Key Laboratory of Petroleum Molecular & Process Engineering Shanghai Key Laboratory of Green Chemistry and Chemical Processes Shanghai Frontiers Science Center of Molecule Intelligent Syntheses Liwa Institute of Skin Health School of Chemistry and Molecular Engineering East China Normal University Shanghai 200062 China Yunnan Characteristic Plant Extraction Laboratory Yunnan Yunke Characteristic Plant Extraction Laboratory Co. Ltd. Kunming 650106 China Department of Dermatology First Affiliated Hospital of Kunming Medical University Kunming 650032 China

The supramolecular assemblies of luminescent metallohelicates play a crucial role in ion transport, thanks to their tunable three-dimensional molecular architecture and advantageous fluorescence properties. In this study, we synthesized a series of benzo[ c ][1,2,5]thiadiazole (BTZ)-based metallohelicates specifically designed for ion transport applications. These carefully crafted metallohelicates possess internal cavities and varying lengths of alkyl side chains, which enable modulation of their compatibility with phospholipid membranes and enhance ion transport efficiency. Moreover, their high fluorescence quantum yields allow for characterization via fluorescence microscopy following successful incorporation into the membranes. Importantly, due to their strong affinity for anions and the smaller ionic radius of chloride, these metallohelicates exhibit selective transport activity for chloride ions.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Biomaterials and materiobiology as the continuous powerhouse of biomedical innovation for our aging society

引用

Fundamental Research 2025年

作者： Yuanyuan Su Shuo Li Guangjun Nie Ruifang Zhao Guanghui Ma Yuliang Zhao Puyue Wang Changsheng Liu Department of Life Sciences National Natural Science Foundation of China Beijing 100085 China National Center for Nanoscience and Technology Beijing 100190 China State Key Laboratory of Biochemical Engineering Institute of Process Engineering Chinese Academy of Sciences Beijing 100190 China East China University of Science and Technology Shanghai 200237 China

来源：评论

学校读者我要写书评

暂无评论

Enantioselective Synthesis of Atropisomeric Tri-Axis Naphthalenes via Diels–Alder Reaction and Dehydrative Aromatization of Isobenzofurans

引用

Angewandte Chemie 2024年第10期137卷

作者： Yuan-Bo Du Qi-Tao Lu Yun-Shu Cui Kai-Wen Wu Dr. Yu Wang Yu-Zhen Zhang Prof. Dr. Zheng Zhao Prof. Dr. Jun-Li Hou Prof. Dr. Quan Cai Department of Chemistry Fudan University 220 Handan Rd. Shanghai 200433 China School of Science and Engineering Shenzhen Institute of Aggregate Science and Technology The Chinese University of Hong Kong Shenzhen (CUHK-Shenzhen) Shenzhen 518172 China Shanghai Key Laboratory of Green Chemistry and Chemical Processes State Key Laboratory of Petroleum Molecular and Process Engineering School of Chemistry and Molecular Engineering East China Normal University Shanghai 200062 China

Atropisomers with multiple stereogenic axes have attracted much attention due to their increasing significance in the fields of natural products, chiral materials, and drug discoveries. However, the catalytic stereoselective construction of axially chiral ring scaffolds with more than two axes on a single benzene ring remains a challenging task. Herein, we present an efficient method for synthesizing triaxially chiral polysubstituted naphthalene scaffolds via sequential Ni(II)-catalyzed Diels–Alder reaction of isobenzofurans and TfOH-promoted dehydrative aromatization reaction. Using 1,3-biarylisobenzofurans and β-aryl-substituted α,β-unsaturated N -acyl pyrazoles as modular reaction partners, a series of naphthalenes with 1,3,4-triaxes were synthesized with excellent enantioselectivities and diastereoselectivities. Furthermore, by attaching two pyrene chromophores to this novel triaxially chiral ring scaffold, a circularly polarized luminescence (CPL)-active dye exhibiting a remarkable luminescence dissymmetry factor ( g lum =−0.019) and high fluorescence quantum efficiency (Ø FL =0.29) was obtained, highlighting the potential applications of atropisomers with multiple stereogenic axes in the design of chiroptical organic materials.

关键词： atropisomers multiple stereogenic axes Diels–Alder reaction dehydrative aromatization CPL-active dyes

来源：评论

学校读者我要写书评

暂无评论

Kinetically Controlled Self-Assembly of Phthalocyanine–Peptide Conjugate Nanofibrils Enabling Superlarge Redshifted Absorption

引用

CCS Chemistry 2019年第2期1卷 173-180页

作者： Luyang Zhao Shukun Li Yamei Liu Ruirui Xing Xuehai Yan State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Center for Mesoscience Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China

Supramolecular assembly could in principle lead to redshifted absorption through J-aggregation of chromophores,which would be a highly promising method for achieving near-infrared materials with improved functionality and *** effectively enhance the material functionalities,one of the great challenges remaining is to achieve an aggregation statewith a redshift larger than 100 nm.

关键词： phthalocyanine peptide self-assembly redshift absorption nanofibers

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：