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Related Concept Videos

Ionic Crystal Structures02:42

Ionic Crystal Structures

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Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
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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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Crystal Field Theory - Tetrahedral and Square Planar Complexes02:46

Crystal Field Theory - Tetrahedral and Square Planar Complexes

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Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
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Valence Bond Theory02:42

Valence Bond Theory

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Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
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Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

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Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
26.2K
Colors and Magnetism03:02

Colors and Magnetism

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Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
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Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of ChalcogenidoplumbatesII or IV
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Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of ChalcogenidoplumbatesII or IV

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Structural and Physical Properties of Two Distinct 2D Lead Halides with Intercalated Cu(II).

Kanika Parashar1, Zheng Zhang2, Volodymyr Buturlim3

  • 1Department of Chemistry & Biochemistry, The University of Oklahoma, Norman, Oklahoma 73019-5251, United States.

Journal of Materials Chemistry. C
|September 23, 2024
PubMed
Summary

Researchers synthesized new two-dimensional (2D) metal halides incorporating copper (Cu2+) for potential electronic applications. The new compound [Cu(O2C-CH2-NH2)2]Pb2Br4 shows semiconductor properties and detects X-rays.

Keywords:
2D layered materialsHalide perovskitesX-ray detectioncopper(II) halidelead(II) halidesemiconductor

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Facile Synthesis of Colloidal Lead Halide Perovskite Nanoplatelets via Ligand-Assisted Reprecipitation
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From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
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From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
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From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding

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Area of Science:

  • Materials Science
  • Solid State Chemistry
  • Nanotechnology

Background:

  • Two-dimensional (2D) metal halides are emerging materials with unique properties.
  • Intercalation of transition metals into 2D metal halide structures is an underexplored area.
  • Hybrid organic-inorganic materials offer tunable electronic and optical characteristics.

Purpose of the Study:

  • To synthesize and characterize novel 2D layered hybrid lead halides incorporating transition metals.
  • To investigate the crystal structure, electronic properties, and potential applications of these new materials.
  • To explore the effect of transition metal intercalation on the physical properties of 2D metal halides.

Main Methods:

  • Synthesis of novel [Cu(O2C-CH2-NH2)2]Pb2Br4 and characterization of [Cu(O2C-(CH2)3-NH3)2]PbBr4.
  • X-ray diffraction for crystal structure determination.
  • Optical, magnetic, thermal, and electrical property measurements.
  • Density functional theory (DFT) calculations.

Main Results:

  • Two layered hybrid lead halides, [Cu(O2C-CH2-NH2)2]Pb2Br4 and [Cu(O2C-(CH2)3-NH3)2]PbBr4, were synthesized.
  • The new compound [Cu(O2C-CH2-NH2)2]Pb2Br4 exhibits a novel structure type and semiconductor behavior (bandgap 3.25 eV).
  • A prototype detector based on [Cu(O2C-CH2-NH2)2]Pb2Br4 demonstrated sensitivity to soft X-rays (8 keV).

Conclusions:

  • The intercalation of Cu2+ into 2D metal halide structures yields materials with interesting semiconductor and radiation detection properties.
  • The new compound [Cu(O2C-CH2-NH2)2]Pb2Br4 shows promise for applications in ionizing radiation detection.
  • Further research into transition metal-intercalated 2D metal halides could lead to new functional materials.