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Related Concept Videos

Halogens03:01

Halogens

Group 17 elements, known as halogens, are nonmetals. At room temperature, fluorine and chlorine are gases, bromine is a liquid, and iodine a solid. Astatine is a highly unstable radioactive element, so currently, most of its properties are unknown due to its short half-life. Tennessine is a synthetic element also predicted to be in this group.
Extraction: Advanced Methods00:56

Extraction: Advanced Methods

Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is formed in...
Photoluminescence: Applications01:14

Photoluminescence: Applications

Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
Colors and Magnetism03:02

Colors and Magnetism

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 eye.
Fluorescence and Phosphorescence: Instrumentation01:25

Fluorescence and Phosphorescence: Instrumentation

Fluorometers and spectrofluorometers are two types of instruments used for measuring molecular fluorescence. These instruments differ in how they select excitation and emission wavelengths and the type of light sources they utilize. Fluorometers use absorption interference filters to choose excitation and emission wavelengths. The excitation source in a fluorometer is typically a low-pressure mercury vapor lamp that emits intense lines distributed throughout the ultraviolet and visible regions.
Ionic Crystal Structures02:42

Ionic Crystal Structures

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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[(DPEPhos)(bcp)Cu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst
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[(DPEPhos)(bcp)Cu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst

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Copper(II) fluorophosphates.

Edward R Williams1, Samuel A Morris, Mark T Weller

  • 1School of Chemistry, University of Southampton, Highfield Campus, Southampton, Hampshire SO17 1BJ, UK.

Dalton Transactions (Cambridge, England : 2003)
|August 4, 2012
PubMed
Summary
This summary is machine-generated.

Eleven novel copper fluorophosphate frameworks were synthesized. Framework structures and features depend on fluoride content, influencing copper coordination and material properties.

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Area of Science:

  • Inorganic Chemistry
  • Materials Science
  • Crystallography

Background:

  • Fluorophosphate materials offer unique structural and chemical properties.
  • Hydrothermal synthesis in fluoride-rich media is key to novel framework discovery.
  • Understanding structure-property relationships in metal-organic frameworks is crucial.

Purpose of the Study:

  • To synthesize and characterize new copper fluorophosphate frameworks.
  • To investigate the influence of fluoride-rich conditions on framework formation.
  • To analyze the structural features and coordination environments within these new materials.

Main Methods:

  • Hydrothermal synthesis using copper(II) fluoride (CuF2), hexafluorophosphoric acid (HPF6), and monovalent metal fluorides.
  • Single crystal X-ray diffraction for detailed structural characterization.
  • Analysis of polyhedral linking and coordination environments.

Main Results:

  • Successfully synthesized eleven new copper fluorophosphate frameworks.
  • Observed diverse framework topologies including chains, layers, and 3D structures.
  • Identified unusual structural features arising from the linking of PO3F, PO2(OH,F)2, and Cu(O,F)n polyhedra.
  • Demonstrated that fluoride content dictates copper coordination and linkage dimensionality.

Conclusions:

  • Fluoride-rich synthesis conditions are critical for forming novel copper fluorophosphate frameworks.
  • The level of fluoride incorporation directly influences the resulting structural complexity and dimensionality.
  • Terminal fluoride anions play a significant role in lining inter-layer spaces and channels in the observed structures.