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Chiral metal nanostructures:synthesis,properties and applications

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稀有金属:英文版 2023年第8期42卷 2489-2515页

作者： Sulaiman Umar Abbas Jun-Jun Li Xing Liu Ayesha Siddique Yong-Xia Shi Man Hou Kai Yang farhat nosheen Xiao-Ya Cui Guang-Chao Zheng Zhi-Cheng Zhang Department of Chemistry School of ScienceTianjin Key Laboratory of Molecular Optoelectronic SciencesTianjin UniversityTianjin 300072China School of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450001China Institute of Chemistry University of SargodhaSargodha 40100Pakistan Department of Electrical and Electronic Engineering Advanced Technology InstituteUniversity of SurreySurrey GU27XHUK Ministry of Education Key Laboratory of Protein Sciences Beijing Advanced Innovation Center for Structural BiologySchool of Life SciencesTsinghua UniversityBeijing 100084China Beijing Frontier Research Center for Biological Structures Tsinghua UniversityBeijing 100084China

Chirality,the property that an object cannot coincide with its mirror image arising from lack of mirror symmetry,is ubiquitous in nature at various length *** physical and chemical properties are strongly related to the nature of chiral complexes,playing a significant role in various fields such as photonics,biochemistry,medicine and *** particular,the recent flexible design of chiral metal nanostructures offers one platform for deeply understanding the origin of chirality and one roadmap for the precise construction of chiral nanomaterials directed by the ***,we summarize the different geometries and classical synthetic approaches to chiral noble metal ***,chiroptical properties and potential applications of chiral metal nanostructures are discussed as ***,the opportunities and challenges toward the synthesis and application of chiral metal nanostructures are proposed.

关键词： Chiral metal nanostructures Circular dichroism(CD) Enantiomers Chiroptical activity

Insight into crystal growth and upconversion luminescence property of tetragonal Ba_(3)Sc_(2)F_(12) nanocrystals

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Rare Metals 2021年第1期40卷 113-122页

作者： Juan Xie Guang-Chao Zheng Yang-Ming Hu farhat nosheen Zhi-Cheng Zhang Er-Jun Liang School of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450001China Division of Science and Technology Department of ChemistryUniversity of EducationLahore 54770Pakistan Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of ChemistrySchool of ScienceTianjin University and Collaborative Innovation Center of Chemical Science and EngineeringTianjin 300072China

Sc-based nanomaterials have attracted considerable attention due to their unique optical properties different from those of Ln/Y-based ***,studies on Sc-based nanomaterials are far from ***,nanoscale alkaline(Ca,Sr and Ba)scandium fluorides were almost ignored for their stringent synthetic ***,we synthesize high-quality tetragonal phase Ba_(3)Sc_(2)F_(12) nanocrystals with uniform morphology and good dispersibility by carefully tailoring the reaction conditions,such as the molar ratio of reactants,temperature and reaction ***,the upconversion(UC)luminescence property of Ba_(3)Sc_(2)F_(12):Yb/Er(Ho)samples is investigated in *** doping concentrations of sensitizer(Yb^(3+))and activator(Er^(3+)and Ho^(3+))are optimized for the strongest UC luminescence,of which the corresponding energy transfer processes are also ***,tetragonal Ba_(3)Sc_(2)F_(12) nanocrystals can gradually transform into hexagonal Ba_(4)Yb_(3)F_(17) nanocrystals with the increase in Yb^(3+)doping *** work provides a novel type of Sc-based nanomaterials with strong red UC emissions which are promising in high-resolution 3-dimensional color displays,laser,bioimaging and biolabels.

关键词： Ba_(3)Sc_(2)F_(12)nanocrystals Crystal growth Upconversion Sc-based nanomaterials

Understanding the dehydrogenation mechanism over iron nanoparticles catalysts based on density functional theory

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Chinese Chemical Letters 2021年第1期32卷 286-290页

作者： Wenjuan Yang Yating Zhu Junjun Li Zheng Chen farhat nosheen Qitao Zhang Zhicheng Zhang SZU-NUS Collaborative Innovation Center for Optoelectronic Science£/Technology International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of EducationInstitute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of ChemistrySchool of ScienceTianjin University&Collaborative Innovation Center of Chemical Science and EngineeringTianjin 300072China Hanshan Normal University Chaozhou 521041China Key Laboratory of Functional Molecular Solids Ministry of EducationAnhui Key Laboratory of Molecule-Based MaterialsCollege of Chemistry and Materials ScienceAnhui Normal UniversityWuhu 241000China Department of Chemistry Division of Science&TechnologyUniversity of EducationLahorePakistan

The conversion of chemical feedstock materials into high value-added products accompanied with dehydrogenation is of great value in the chemical ***,the catalytic dehydrogenation reaction is inhibited by a limited number of expensive noble metal catalysts and lacks understanding of dehydrogenation ***,we report the use of heterogeneous non-noble metal iron nanoparticles(NPs) incorporated mesoporous nitrogen-doped carbon to investigate the dehydrogenation mechanism based on experiment observation and density functional theory(DFT) *** NPs catalyst displays excellent performance in the dehydrogenation of 1,2,3,4-tetrahydroquinoline(THQ)with 100% selectivity and 100% conversion for 10-12 h at room *** calculated adsorption energy implies that THQ prefers to adsorb on Fe NPs as compared with absence of Fe *** is more,the energy barrier of transition state is relatively low,illustrating the dehydrogenation is *** work provides an atomic scale mechanism guidance for the catalytic dehydrogenation reaction and points out the direction for the design of new catalysts.

关键词： Dehydrogenation mechanism Fe nanoparticles Density functional theory Transition states 1,2,3,4-Tetrahydroquinoline Theoretical calculations

Three-dimensional hierarchical Pt-Cu superstructures

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Nano Research 2015年第3期8卷 832-838页

作者： farhat nosheen Zhicheng Zhang Guolei Xiang Biao Xu Yong Yang Faisal Saleem Xiaobin Xu Jingchao Zhang Xun Wang Department of Chemistry Tsinghua University Beijing 100084 China

三维(3D ) 层次 Pt-Cu 四角形，高度分叉，并且树枝状的上层建筑被一条灵巧的没有模板的热水的途径综合了，出现生长模式沿着(111， 110 ) ，(111 ) ，并且(100 ) 飞机分别地。这些结构被传播电子显微镜学( TEM )描绘了，X光检查衍射( X... 详细信息

三维(3D ) 层次 Pt-Cu 四角形，高度分叉，并且树枝状的上层建筑被一条灵巧的没有模板的热水的途径综合了，出现生长模式沿着(111， 110 ) ，(111 ) ，并且(100 ) 飞机分别地。这些结构被传播电子显微镜学( TEM )描绘了，X光检查衍射( XRD )，精力散X光检查光谱学( EDX )，诱导地联合的血浆光排放 spectrometry ( ICP-OES )和详细形成机制被开发了，它证明在里面形成的 situ 我在 Cu 和磅之间的 2 和流电的代替反应4+可以指导这些上层建筑的形成。比较 electrocatalytic 性质为甲醇和乙醇氧化被调查了。由于他们的互连的手臂，足够的吸收地点，和暴露的表面，这些上层建筑展览为甲醇和乙醇的电镀物品氧化提高了 electrocatalytic 性能什么时候与商业 Pt/C 和磅黑色相比。

关键词：上层建筑三维电感耦合等离子体透射电子显微镜 ICP-OES 光学发射光谱铂铜

多酸阴离子对金属有机骨架纳米晶生长的调控（英文）

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Science China Materials 2015年第5期58卷 370-377页

作者：徐晓斌陆言杨勇 farhat nosheen 王训 Department of Chemistry Tsinghua University

在金属阳离子和多酸阴离子之间广泛存在着一种超分子相互作用,它经常被用来合成多酸基金属-有机骨架晶态材料.这种相互作用还可以用来调控金属-有机骨架材料的成核生长过程,从而实现其纳米晶体的可控制备.本文将Keggin型多酸阴离子引入... 详细信息

在金属阳离子和多酸阴离子之间广泛存在着一种超分子相互作用,它经常被用来合成多酸基金属-有机骨架晶态材料.这种相互作用还可以用来调控金属-有机骨架材料的成核生长过程,从而实现其纳米晶体的可控制备.本文将Keggin型多酸阴离子引入到金属-有机骨架材料的前驱体溶液中作为调节剂,得到一系列形貌规则、尺寸均一的[Cu3(BTC)2]n(BTC=1,3,5-苯三甲酸)纳米晶,包括八面体、截角八面体、多级空心球、空心八面体等.此外,这种体系可以用于构建贵金属纳米晶@金属-有机骨架复合材料,其催化性质相对于单纯的贵金属纳米晶有较大提高.

关键词：纳米晶 Cu BTC 多酸阴离子 POMs 调控调节控制