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Related Concept Videos

Halogens03:01

Halogens

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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. 
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Other Nuclides: 31P, 19F, 15N NMR01:16

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Many organic, inorganic, and biological molecules contain spin-half nuclei such as nitrogen-15, fluorine-19, and phosphorus-31. As a result, NMR studies of these nuclei have found extensive applications in chemical and biological research.
While fluorine-19 and phosphorous-31 have high natural abundances (100%) and positive gyromagnetic ratios, nitrogen-15 has a low natural abundance and a negative gyromagnetic ratio. However, nitrogen-15 is still preferred over nitrogen-14 (which has a...
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Atomic Fluorescence Spectroscopy01:29

Atomic Fluorescence Spectroscopy

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Atomic fluorescence spectroscopy (AFS) is an analytical technique that involves the electronic transitions of atoms in a flame, furnace, or plasma being excited by electromagnetic (EM) radiation. When these atoms absorb energy, they become excited and subsequently release energy as they return to their original state. This emitted light, or "fluorescence," is observed at a right angle to the incident beam. Both absorption and emission processes transpire at distinct wavelengths, which...
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Molecular Shape and Polarity03:37

Molecular Shape and Polarity

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Dipole Moment of a Molecule
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Electron Affinity03:07

Electron Affinity

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The electron affinity (EA) is the energy change for adding an electron to a gaseous atom to form an anion (negative ion).
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Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene01:13

Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene

7.0K
Bromination and chlorination of aromatic rings by electrophilic aromatic substitution reactions are easily achieved, but fluorination and iodination are difficult to achieve. Fluorine is so reactive that its reaction with benzene is difficult to control, resulting in poor yields of monofluoroaromatic products. To address this, Selectfluor reagent is used as a fluorine source in which a fluorine atom is bonded to a positively charged nitrogen.
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Assessment of Boron Doped Diamond Electrode Quality and Application to In Situ Modification of Local pH by Water Electrolysis
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Fluorine-based color centers in diamond.

S Ditalia Tchernij1,2,3, T Lühmann4, E Corte1,2

  • 1Physics Department, University of Torino, 10125, Turin, Italy.

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|December 10, 2020
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Summary
This summary is machine-generated.

Researchers created and studied luminescent diamond substrates using fluorine (F) ion implantation and annealing. They identified new F-related optical centers responsible for specific light emissions in diamond.

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Area of Science:

  • Materials Science
  • Solid-State Physics
  • Optical Materials

Background:

  • Diamond is a promising material for quantum technologies due to its unique optical and electronic properties.
  • Defects in diamond can act as optical centers, enabling applications in sensing and quantum information processing.
  • Fluorine (F) implantation is a method to introduce specific defects into diamond for tailored optical properties.

Purpose of the Study:

  • To investigate the luminescence properties of high-purity diamond after fluorine ion implantation and thermal annealing.
  • To characterize the optical centers responsible for observed emissions.
  • To understand the influence of experimental parameters on the luminescence of F-related defects.

Main Methods:

  • High-purity diamond substrates were implanted with fluorine ions.
  • Implanted samples underwent thermal annealing.
  • Photoluminescence spectroscopy was performed at room temperature and liquid helium temperature.
  • Emission properties were analyzed as a function of temperature, excitation wavelength, and F implantation fluence.

Main Results:

  • Room-temperature photoluminescence showed a weak line at 558 nm and intense bands from 600-750 nm.
  • Low-temperature characterization revealed structured emission lines between 600-670 nm.
  • Observed spectral features correlated with F implantation fluence and were exclusive to F-implanted and annealed samples.
  • Emission properties depended on operating temperature and excitation wavelength.

Conclusions:

  • The observed luminescence features are attributed to stable, F-containing defective complexes within the diamond lattice.
  • This study identifies new F-related optical centers in diamond with potential applications.
  • The findings contribute to the understanding of defect engineering in diamond for optical and quantum applications.