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化学“101计划”无机化学课程总体构思与设计

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大学化学 2024年第10期39卷 14-21页

作者：匡勤郑兰荪朱亚先厦门大学化学化工学院福建厦门361005

无机化学课程是化学类专业本科生的重要专业必修课,也是化学“101计划”确定的核心理论课程之一。本文在对国内外无机化学课程调研分析的基础上,围绕“101计划”建设目标,阐述了无机化学的课程定位、教学目标、教学内容、教学建议等,旨... 详细信息

无机化学课程是化学类专业本科生的重要专业必修课,也是化学“101计划”确定的核心理论课程之一。本文在对国内外无机化学课程调研分析的基础上,围绕“101计划”建设目标,阐述了无机化学的课程定位、教学目标、教学内容、教学建议等,旨在推动无机化学教学的改革与创新,提升人才培养质量。

关键词：化学“101计划” 无机化学课程设计教学改革

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Facile synthesis of size-tunable ZIF-8 nanocrystals using reverse micelles as nanoreactors

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Science China Chemistry 2014年第1期57卷 141-146页

作者： ZHAO XiaoJing FANG XiaoLiang WU BingHui zheng lansun zheng NanFeng State Key Laboratory for Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy Materials Department of Chemistry College of Chemistry and Chemical Engineering Xiamen University Pen-Tung Sah Institute of Micro-Nano Science and Technology Xiamen University

This paper describes a robust method for the synthesis of high-quality ZIF-8 nanocrystals using reverse micelles as discrete nanoscale *** precise size control of ZIF-8 nanocrystals is conveniently achieved by tuning the concentration of precursors,reaction temperatures,the amount of water,and the structure of *** as-synthesized ZIF-8 nanocrystals are of narrow distribution and tunable size.A size-dependent catalytic activity for Knoevenagel condensation reaction is further demonstrated by using ZIF-8 nanocrystals with different sizes as the *** facile method opens up a new opportunity in the synthesis of various ZIFs nanocrystals.

关键词： ZIF-8,nanocrystals,reverse micelles,catalysis

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Advances in microwave absorbing materials with broad-bandwidth response

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Nano Research 2023年第8期16卷 11054-11083页

作者： Susu Bao Meixi Zhang Zhiyuan Jiang Zhaoxiong Xie lansun zheng State Key Laboratory for Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China

Microwave absorbing materials(MAMs)are playing an increasingly essential role in the development of wireless communications,high-power electronic devices,and advanced target detection *** with a broad-bandwidth response are particularly important in the area of communication security,radiation prevention,electronic reliability,and military *** considerable progress has been made in the design and preparation of MAMs with a broad-bandwidth response,a number of challenges still remain,and the structure–function relationship of MAMs is still far from being completely ***,the advances in the design and research of MAMs with a broad-bandwidth response are *** main strategies for expanding the effective absorption bandwidth of MAMs are comprehensively summarized considering three perspectives:the chemical combination strategy,morphological control strategy,and macrostructure control *** important results as well as design principles and absorption mechanisms are highlighted.A coherent explanation detailing the influence of the chemical composition and structure of various materials on the microwave absorption properties of MAMs is *** main challenges,new opportunities,and future perspectives in this promising field are also presented.

关键词： microwave absorbing materials broad-bandwidth response magnetic-dielectric synergy morphology control macrostructure control

Surfactant dependent evolution of Au-Pd alloy nanocrystals from trisoctahedron to excavated rhombic dodecahedron and multipod： a matter of crystal growth kinetics

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Science Bulletin 2017年第20期62卷 1359-1364页

作者： Qiaoli Chen Guifen Du Yongdi Dong Zhenming Cao Zhaoxiong Xie lansun zheng State Key Laboratory of Physical Chemistry of Solid Surfaces Department of Chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China Pen-Tung Sah Institute of Micro-Nano Science and Technology Xiamen University Xiamen 361005 China

In wet chemical syntheses of noble metal nanocrystals,surfactants play crucial roles in regulating their *** date,more attention has been paid to the effect of the surfactant on the surface energy of crystal facets,while less attention has been paid to its effect on the growth *** this paper,using the growth of Au-Pd alloy nanocrystals as an example,we demonstrate that different concentration of surfactant hexadecyltrimethyl ammonium chloride(CTAC)may cause the different packing density of CTA+bilayers on different sites(face,edge or vertex)of crystallite surface,which would change the crystal growth kinetics and result in preferential crystal growth along the edge or vertex of *** unique shape evolution from trisoctahedron to excavated rhombic dodecahedron and multipod structure for Au-Pd alloy nanocrystals was successfully achieved by simply adjusting the concentration of *** results help to understand the effect of surfactants on the shape evolution of nanocrystals and open up avenues to the rational synthesis of nanocrystals with the thermodynamically unfavorable morphologies.

关键词： Au-Pd alloy Morphology Nanocrystal Surfactant

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Tuning Order-Disorder Phase Transition through Regulating the Substituent Group of Anion

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Chinese Journal of Chemistry 2017年第6期35卷 957-963页

作者： Dong Li Lihong Chen Haixia Zhao Lasheng Long lansun zheng State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry College of Chemistry and Chemieal Engineering Xiamen University Xiamen Fujian 361005 China

The structural phase transition compound {[（CH3）2CHCH2]2NH2}·[CF3COO] （1） has been synthesized based on the diisobutylamine and trifluoroacetic acid. The DSC data reveal that 1 undergoes a phase transition at 277 K （Tc）. When one chlorine atom replaces one fluorine atom on trifluoroacetate anion, three order-disorder phase transitions at 251 K （Ti）, 282 K （T2） and 290 K could be achieved owing to a stepwise release of rotation motions of the anion and cation in {[（CH3）2CHCH2]2NH2}·[CF2C[COO] （2）. Based on the variable temperature crystal structures, the phase transition in compound 1 is triggered by the rotation of three fluorine atoms on the trifluoroacetate anion synchronized with the motions of the methyl groups on the diisobutylammonium cation. However, in compound 2, the phase transitions can be realized by a sequence of motions of both the anion and cation. Besides, the dielectric- temperature dependences were investigated in order to prove this regulation process. All of this investigation will be beneficial to design and synthesis of the novel phase transition materials and molecular dielectric materials on pur- pose.

关键词： phase transition dielectric materials order-disorder phase transition structural phase transition

One-step synthesis of thermally stable artificial multienzyme cascade system for efficient enzymatic electrochemical detection

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Nano Research 2019年第12期12卷 3031-3036页

作者： Xiqing Cheng Jinhong Zhou Jiayu Chen Zhaoxiong Xie Qin Kuang lansun zheng State Key Laboratory of Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy Materialsand Department of ChemistryCollege of Chemistry and Chemical Engineering Xiamen UniversityXiamen 361005China Pen-Tung Sah Institute of Micro-Nano Science and Technology Xiamen UniversityXiamen 361005China

Recently,metal-organic framework(MOF)-based multienzyme systems integrating different functional natural enzymes and/or nanomaterial-basedartificial enzymes are attracting increasing attention due to their high catalytic efficiency and promising application in *** controllable integration of enzymes or nanozymes within MOFs is crucial for achieving efficient cascade catalysis and high ***,we report a facile electrochemical assisted biomimetic mineralization strategy to prepare an artificial multienzyme system for efficient electrochemicaldetection of *** using the G0x@Cu-MOF/copper foam(G0x@Cu-MOF/CF)architecture as a proof of concept,efficientenzyme immobilization and cascade catalysis were achieved by in situ encapsulation of glucose oxidase(GOx)within MOFs layer grown onthree-dimensional(3D)porous conducting CF via a facile one-step electrochemical assisted biomimetic mineralization *** to thebio-electrocatalytic cascade reaction mechanism,this well-designed GOx@Cu-MOF modified electrode exhibited superior catalytic activityand thermal stability for glucose ***,the activity of GOx@Cu-MOF/CF still remained at ca.80%after being incubated at 80℃.In sharp contrast,the activity of the unprotected electrode was reduced to the original 10%after the same *** design strategypresented here may be useful in fabricating highly stable enzyme@MOF composites applied for efficient photothermal therapy and otherplatform under high temperature.

关键词： metal-organic frameworks artificial multienzyme electrochemical assisted biomimetic mineralization glucose detection thermal stability

Tuning Solvent Composition to Enhance the Stability of Metal Clusters in Mass Spectrometry

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Chinese Journal of Structural Chemistry 2022年第4期41卷 34-39页

作者： Yingzi Han Yihuang Jiang Jing Jeanne Yang Shuichao Lin Zichao Tang lansun zheng State Key Laboratory of Physical Chemistry of Solid Surface College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China

Electrospray ionization time-of-flight mass spectrometry(ESI-TOF-MS)has been recognized as a powerful technique for studying metal clusters’chemical composition and reaction *** is a great challenge in mass spectrometry analysis to maintain the metal cluster molecules intact without fragmentation,which is achieved in this work by using mixed solvents to change the interaction between cluster molecules and solvent molecules,further affecting the fragmentation behaviors of the metal cluster in *** analysis reveals that the stability of the[(C)Au_(6)Ag_(2)(C_(18)H_(14)ONP)_(6)]^(4+)cluster in ESI-TOF-MS is related to the strength of the chemical bonds between its own atoms and the bonding between the solvent and the cluster molecules.

关键词： metal cluster mass spectrometry fragmentation stability hydrogen bond

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A finite oxidation strategy for customizing heterogeneous interfaces to enhance magnetic loss ability and microwave absorption of Fe-cored carbon microcapsules

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Nano Research 2023年第8期16卷 11084-11095页

作者： Meixi Zhang Laisen Wang Susu Bao Zhijia Song Wenjiao Chen Zhiyuan Jiang Zhaoxiong Xie lansun zheng State Key Laboratory for Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China College of Materials Xiamen UniversityXiamen 361005China

Metallic iron particles are of great potential for microwave absorption materials due to their strong magnetic loss ***,the oxidation susceptibility of metallic iron particles in the atmospheric environment is regarded as a major factor causing performance *** many efforts have been developed to avoid their oxidation,whether partial surface oxidized iron particles can improve the microwave absorbing performance is rarely *** order to explore the effect of partial surface oxidation of iron on its properties,the designed yolk–shelled(Fe/FeO_(x))@C composites with multiple heterointerfaces were synthesized via an in-situ polymerization and a finite reduction–oxidation process of Fe_(2)O_(3)*** performance enhancement mechanisms of Fe/FeO_(x)heterointerfaces were also *** is demonstrated that the introduction of Fe-based heterogeneous interfaces can not only enhance the dielectric loss,but also increase the imaginary part of the permeability in the higher frequency range to strengthen the magnetic loss ***,the yolk–shell structure can effectively improve impedance matching and enhance microwave absorption performances via increasing multiple reflection and scattering behaviors of incident *** to Fe@C composite,the effective absorption(reflection loss(RL)<−10 dB)bandwidth of the optimized(Fe/FeO_(x))@C-2 increases from 5.7 to 7.3 GHz(10.7–18.0 GHz)at a same matching thickness of 2 mm,which can completely cover *** work offers a good perspective for the enhancement of magnetic loss ability and microwave absorption performance of Fe-based microwave absorption materials with promising practical applications.

关键词： heterogeneous interfaces finite oxidation yolk-shell structure magnetic loss interface polarization microwave absorption

A facile surfactant-free synthesis of Rh flower-like nanostructures constructed from ultrathin nanosheets and their enhanced catalytic properties

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Nano Research 2016年第3期9卷 849-856页

作者： Yaqi Jiang Jingyun Su Yanan Yang Yanyan Jia Qiaoli Chen Zhaoxiong Xie lansun zheng State Key Laboratory of Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy Materials andDepartment of Chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China

Rh is an important catalyst that is widely used in a variety of organic reactions. In recent years, many efforts have focused on improving its catalytic efficiency by fabricating catalyst nanoparticles with controlled size and morphology. However, the frequently employed synthesis route using organic compounds either as the reaction medium or capping agent often results in residual molecules on the catalyst surface, which in turn drastically diminishes the catalytic performance. Herein, we report a facile, aqueous, surfactant-free synthesis of a novel Rh flower- like structure obtained via hydrothermal reduction of Rh（acac）3 by formaldehyde. The unique Rh nanoflowers were constructed from ultrathin nanosheets, whose basal surfaces comprised {111} facets with an average thickness of -1.1 nm. The specific surface area measured by CO stripping was 79.3 m2-g-1, which was much larger than that of commercial Rh black. More importantly, the Rh nanoflower catalyst exhibited excellent catalytic performance in the catalytic hydrogenation of phenol and cyclohexene, in contrast to the commercial Rh black and polyvinyl pyrrolidone （PVP）-capped Rh nanosheets exposed by similar {111} basal surfaces.

关键词： rhodium nanocrystal nanosheet hydrogenation reaction