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Metallic Solids02:37

Metallic Solids

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Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
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Millifluidics for Chemical Synthesis and Time-resolved Mechanistic Studies
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Non-Equilibrium Assembly of Atomically-Precise Copper Nanoclusters.

Peng Zhao1, Linjie Xu1, Bohan Li1

  • 1School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China.

Advanced Materials (Deerfield Beach, Fla.)
|January 31, 2024
PubMed
Summary
This summary is machine-generated.

Researchers developed novel copper nanoclusters (CuNCs) for dissipative assemblies (DSAs). These CuNCs exhibit precise structure control and dynamic behavior, enabling the creation of life-like materials with tunable properties.

Keywords:
atomic precisioncoordinated networkcopper nanoclustersdissipative self‐assemblypolymer topology switch

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Area of Science:

  • Coordination Chemistry
  • Materials Science
  • Supramolecular Chemistry

Background:

  • Precise structure control in dissipative assemblies (DSAs) is crucial for biological functions but challenging in artificial systems.
  • Existing artificial DSAs lack the accuracy and functionality required for complex applications.
  • Coordination chemistry offers a promising avenue for designing dynamic and responsive materials.

Purpose of the Study:

  • To introduce a novel approach for creating atomically-precise copper nanoclusters (CuNCs) using complex chemical reaction networks.
  • To investigate the dynamic reorganization and dissipative behavior of these CuNCs.
  • To explore the potential of CuNCs as building blocks for life-like materials with tunable properties.

Main Methods:

  • Synthesis of atomically-precise copper nanoclusters (CuNCs) based on coordination chemistry.
  • Investigation of CuNC reorganization via changes in Cu(I)-ligand ratio and metallophilic/coordination interactions.
  • Study of dissipative cycles induced by ascorbic acid (AA) and environmental factors (ions, O2, pH).
  • Characterization of optical properties and topological changes in polymeric networks incorporating CuNCs.

Main Results:

  • Atomically-precise CuNCs, specifically Cu11(µ9-Cl)(µ3-Cl)3L6Cl, were synthesized.
  • Dynamic reorganization of CuNCs into metastable and equilibrium states was observed.
  • Dissipative cycles were initiated and controlled by factors including ascorbic acid concentration and pH.
  • Halide ions were found to influence optical properties and network topology.
  • CuNCs demonstrated potential as modular units in polymers for materials mechanics and functionalization.

Conclusions:

  • Complex chemical reaction networks rooted in coordination chemistry enable the creation of precisely structured and dynamic CuNCs.
  • Cu(I)-Cu(I) metallophilic and coordination interactions are key to designing life-like materials with controllable dissipative behavior.
  • These findings pave the way for developing advanced DSAs with precise structures and functionalities for various applications.