检索结果-南通市图书馆

Selective C-C bonds formation,N-alkylation and benzo[d]imidazoles synthesis by a recyclable zinc composite

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2022年第1期33卷 266-270页

作者： Guanxin Zhu Zheng-Chao Duan Haiyan Zhu Dongdong Ye Dawei Wang The Key Laboratory of Synthetic and Biological Colloids Ministry of EducationSchool of Chemical and Material EngineeringJiangnan UniversityWuxi 214122China State Key Laboratory of Pulp and Paper engineering South China University of TechnologyGuangzhou 510640China school of Chemical and Environmental engineering Hubei Minzu UniversityEnshi 445000China

Earth abundant metals are much less expensive,promising,valuable metals and could be served as catalysts for the borrowing hydrogen reaction,dehydrogenation and heterocycles synthesis,instead of noble *** uniformly dispersed zinc composites were designed,synthesized and carefully characterized by means of XPS,EDS,TEM and *** resulting zinc composite showed good catalytic activity for the N-alkylation of amines with amines,ketones with alcohols in water under base-free conditions,while unsaturated carbonyl compounds could also be synthesized by tuning the reaction ***,it was the first time to realize the synthesis of 2-aryl-1H-benzo[d]imidazole derivatives by using this zinc composite under green ***,this zinc catalyst could be easily recovered and reused for at least five times.

关键词： Unsymmetrical Zinc Borrowing hydrogen Recyclability Selective

Formation and evolution mechanisms of large-clusters during rapid solidification process of liquid metal Al

在线全文

学校读者我要写书评

暂无评论

science China(Physics,Mechanics & Astronomy) 2005年第1期48卷 101-112页

作者： LIU Rangsu, DONG Kejun, LIU Fengxiang, ZHENG Caixing, LIU Hairong & LI Jiyong Department of Applied Physics, Hunan University, Changsha 410082, China College of materials science and engineering, Hunan University, Changsha 410082, China College of Chemistry and Chemical engineering, Hunan University, Changsha 410082, China 1. Department of Applied Physics Human University 410082 Changsha China 2. College of materials science and engineering Hunan University 410082 Changsha China 3. College of Chemistry and Chemical engineering Hunan University 410082 Changsha China

A molecular dynamics simulation study has been performed for the formation and evolution characteristics of nano-clusters in a large-scale system consisting of 400000 atoms of liquid metal Al. The center-atom method combined with pair-bond analysis technique and cluster-type index method (CTIM) has been applied here to describe the structural configurations of various basic clusters. It is demonstrated that both the 1551 bond-type and the icosahedral cluster (12 0 12 0) constructed by 1551 bond-types are dominant among all the bond-types and cluster-types, respectively, in the system and play a critical role in the microstructure transitions of liquid metal Al. The nano-clusters (containing up to 150 atoms) are formed by the combination of some middle and small clusters with distinctly different sizes, through mutual competition by unceasing annex and evolution in a seesaw manner (in turn of obtaining and losing),which do not occur as the multi-shell structures accumulated with an atom as the center and the surrounding atoms are arranged according to a certain rule. This is the essential distinction of nano-cluster in liquid metal from those obtained by gaseous deposition, ionic spray methods, and so on. Though the nano-clusters differ from each other in shape and size, all of them possess protruding corners that could become the starting points of various dendrite structures in the solidification processes of liquid metals.

关键词： liquid metal, solidification process, large-cluster configuration, evolution mechanism, computer simulation.

MOF-assisted Synthesis of Dual-atom Palladium Catalysts for Acetylene Semi-hydrogenation

在线全文

学校读者我要写书评

暂无评论

China Petroleum Processing & Petrochemical Technology 2024年第3期26卷 42-52页

作者： Chen Jie Xu Yuebing Qi Jian Liu Bing Liu Xiaohao Department of Chemical engineering School of Chemical and Material EngineeringJiangnan UniversityWuxi 214122China State Key Laboratory of Biochemical engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China

The selective removal of trace acetylene in ethylene feed gas is of great significance in the petrochemicalindustry;however, there are still challenges in designing and developing high-performance catalysts. Here, a MOFassistedencapsulation strategy was adopted for the precise synthesis of diatomic Pd2 sites on a ZnO support. When usedfor the acetylene semi-hydrogenation reaction, the dual-atom Pd2-ZnO catalyst exhibited improved catalytic performance,achieving complete conversion of acetylene at 125 °C with an 89% selectivity to ethene, as compared to Pd single-atom andnanoparticles. This enhancement was mainly attributed to the catalyst’s ability to dissociate H2 and facilitate the desorptionof intermediate C2H4. Moreover, the strong interaction between the support and the diatomic Pd sites was responsible for thecatalyst’s excellent stability during the long-term reaction.

关键词： dual-atom palladium acetylene semi-hydrogenation MOFs hydrogen dissociation intermediate

Recent progress on the design and fabrication of micromotors and their biomedical applications

在线全文

学校读者我要写书评

暂无评论

Bio-Design and Manufacturing 2018年第4期1卷 225-236页

作者： Wensen Jiangl Liang Ma Xiaobin Xul school of materials science and engineering Tongji UniversityShanghai 201804China State Key Laboratory of Fluid Power and Mechatronic Systems &school of Mechanical engineering Zhejiang UniversityHangzhou 310058China

The advancement in the micro-/nanofabrication techniques has greatly facilitated the development of micromotors.A variety of micromotors have been invented with powerful functions,which have attracted a broad range of interests from chemistry, physics,mechanics,biology and *** this paper,we reviewed recent progress in micromotors and highlighted representative *** mechanisms of micromotors by internal and external energy sources were *** described general fabrication strategies of the popular micromotors (wire,tubular,helical and Janus)including bottom-up and top-down *** the application section,we primarily focused on the biological applications,such as biological cargo delivery, biosensing and *** last,we discussed the current challenges and provided future prospects.

关键词： Micromotor Nanomotor Electric tweezers Drug delivery Nanorobot Micromachine

High-throughput fluorescent screening of thioredoxin reductase inhibitors to inhibit Mycobacterium tuberculosis

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第3期35卷 358-362页

作者： Fei Yan Xin Zhao Ruibo Li Xiuyan Han Qiulong Yan Lei Feng Xiulan Xin Jingnan Cui Xiaochi Ma Second Affiliated Hospital Dalian Medical UniversityDalian 116044China State Key Laboratory of Fine Chemicals Dalian University of TechnologyDalian 116024China Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy Xuzhou Medical UniversityXuzhou 221004China school of Chemistry and Chemical engineering Henan Normal UniversityXinxiang 453007China College of Bioengineering Beijing PolytechnicBeijing 100029China

Tuberculosis(TB)is a chronic infectious disease,which is caused by the pathogen Mycobacterium tuberculosis(Mtb)and reemerged as a global health risk with a significant proportion of multi-drug resistant and extensively drug resistant TB *** is very urgent to find some novel high-confidence drug targets in Mtb for discovering the effective anti-TB *** reductase(TrxR)has been identified to be a highly viable target for anti-TB drugs for its important role in protecting the pathogen from thiol-specific oxidizing stress,regulating intracellular dithiol/disulfide homeostasis and DNA replication and *** the present work,a near-infrared(NIR)fluorescent probe DDAT was developed for the detection of TrxR activity and used to high-throughput screen the TrxR inhibitors from natural *** screened TrxR inhibitors from Sappan Lignum and microbial metabolites that were further used to inhibit Mycobacterium *** the results indicate that DDAT is a practical fluorescent molecular tool for the discovery of potential anti-TB drugs.

关键词： Thioredoxin reductase NIR fluorescent probe Fluorescence imaging High-throughput screening inhibitors Inhibit Mycobacterium tuberculosis

1T-phase MoS_(2)edge-anchored Pt_(1)-S_(3)active site boosting selective hydrogenation of biomass-derived maleic anhydride

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2023年第8期42卷 2658-2669页

作者： Xue Sun Yi Zhao Kuan Chang Bo Peng Qing-Qing Gu Bing Yang Bai-Yang Yu Jing Xu Fu-Dong Liu Ying Zhang Cheng-Si Pan Yang Lou Key Laboratory of Synthetic and Biological Colloids Ministry of EducationSchool of Chemical and Material EngineeringJiangnan UniversityWuxi 214122China International Joint Research Center for Photoresponsive Molecules and materials Jiangnan UniversityWuxi 214122China SINOPEC Research Institute of Petroleum Processing Beijing 100083China Dalian National Laboratory for Clean Energy Dalian Institute of Chemical PhysicsDalian 116023China school of Food science and Technology Jiangnan UniversityWuxi 214122China Department of Civil Environmentaland Construction EngineeringCatalysis Cluster for Renewable Energy and Chemical Transformations(REACT)NanoScience Technology Center(NSTC)University of Central FloridaOrlandoFL 32816USA

Selective hydrogenation of biomass-derived maleic anhydride(MAH)to succinic anhydride(SA)is valuable but remains a challenge due to the complicated reaction *** here report that single Pt atoms decorated onto the edges of two-dimensional(2D)1Tphase MoS_(2)(Pt1/1T-MOS_(2)SAC)as a proof-of-concept catalyst can efficiently convert biomass-derived MAH to SA with 100%conversion and 100%selectivity under mild *** kinetic data and characterization results suggest that the catalytic performance of the edge-anchored Pt1/1T-MoS_(2)SAC originates from the facile H_(2)dissociation induced by the electron-deficient Pt1atoms and the pocket-like configuration of Pt1active site confines the adsorption configuration of MAH by the steric *** strategy of fabricating edge-confined catalysts offers a new direction to design novel SACs for biomass-derived transformations.

关键词： Two-dimensional(2D)1T-MoS_(2) Edgeconfinement Pt single atoms Selective hydrogenation reaction Reaction kinetics

Controlling dispersion and morphology of MoS2 nanospheres by hydrothermal method using SiO2 as template

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical engineering 2018年第5期26卷 1229-1234页

作者： Zhenwei Zhang Peng Wang Fei Wang Yaqing Li Wei Lu Xingmao Jiang Xia Gui Zhi Yun College of Chemical engineering Nanjing Tech University Nanjing 210009 China College of Mathematics Science and Chemical Engineering Changzhou Institute of Technology Changzhou 213022 China Department of Chemical engineering Changzhou University Changzhou 213016 China Hubei Key Lab of Novel Reactor & Green Chemical Technology Key Laboratory for Green Chemical Process of Ministry of Education School of Chemical Engineering and Pharmacy Wuhan Institute of Technology China

Monodispersed MoS_2 nanospheres were successfully synthesized by using SiO_2 as hard template. The size and morphology of the MoS_2 nanospheres could be finely controlled by the content of SiO_2 and sulfur precursors. Furthermore, higher surface area of monodispersed MoS_2 nanospheres exhibited high reaction rate for hydrodesulfurization(HDS) of dibenzenethiophene(DBT).

关键词： Molybdenum disulfide Hard template Monodisperse Hydrodesulfufization

The Nano Research Young Innovators Awards in bio-inspired nanomaterials

在线全文

学校读者我要写书评

暂无评论

Nano Research 2024年第2期17卷 417-425页

作者： Jun Chen Shuotao Wang Department of Bioengineering University of CaliforniaLos AngelesLos AngelesCA 90095USA Key Laboratory of Bio-inspired materials and Interfacial science Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China

Nano Research Young Innovators(NR45)Awards are designed to acknowledge and celebrate the achievements of young researchers under 45 years of *** individuals have made significant contributions to the field of nanoscience and *** the inaugural NR45 Awards in 2018,the journal's editorial board has recognized over a hundred innovators specializing in nanobiotechnology,nano energy,two-dimensional materials,and *** focus of the 2023 NR45 Awards is on bioinspired nanomaterials,acknowledging thirty-three outstanding young innovators for their extraordinary contributions in developing these materials with applications spanning clean energy,human healthcare,monitoring,and disease treatments,as shown in *** extend our heartfelt congratulations to all the 33 NR45 Awardees in 2023!

关键词： journal materials contributions

High-entropy perovskite oxides: A versatile class of materials for nitrogen reduction reactions

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

science China materials 2022年第10期65卷 2711-2720页

作者： Kaibin Chu Jingjing Qin Haiyan Zhu Michiel De Ras Chuang Wang Lei Xiong Longsheng Zhang Nan Zhang Johan A.Martens Johan Hofkens Feili Lai Tianxi Liu The Key Laboratory of Synthetic and Biological Colloids Ministry of EducationSchool of Chemical and Material EngineeringInternational Joint Research Laboratory for Nano Energy CompositesJiangnan UniversityWuxi 214122China Department of Chemistry KU LeuvenCelestijnenlaan 200FLeuven 3001Belgium State Key Laboratory of Food science and Technology Jiangnan UniversityWuxi 214122China Centre of Surface Chemistry and Catalysis:Characterisation and Application Team KU LeuvenLeuven 3001Belgium Max Planck Institute for Polymer Research Ackermannweg 10Mainz 55128Germany

Despite the intense research efforts directed to electrocatalytic nitrogen reduction reaction(eNRR),the NH_(3) yield and selectivity are still not up to the standard of practical ***,high-entropy perovskite oxides with composition Bax(FeCoNiZrY)_(0.2)O_(3−δ)(Bx(FCNZY)_(0.2)(x=0.9,1)are reported as eNRR *** eNRR activity of high-entropy perovskite oxide is enhanced by changing the nonstoichiometric metal elements at the A-site,thus generating additional oxygen *** NH_(3) yield and Faraday efficiency for B_(0.9)(FCNZY)_(0.2) are 1.51 and 1.95 times higher than those for B(FCNZY)_(0.2),*** d-band center theory is used to theoretically predict the catalytically active center at the B-site,and as a result,nickel was identified as the catalytic *** free energy values of the intermediate states in the optimal distal pathway show that the third protonation step(*NNH_(2)→*NNH_(3))is the rate-determining step and that the increase in oxygen vacancies in the high-entropy perovskite contributes to nitrogen adsorption and *** work provides a framework for applying high-entropy structures with active site diversity for electrocatalytic nitrogen fixation.

关键词： high entropy perovskite nitrogen reduction reaction catalytic activity center