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Related Concept Videos

Preparation and Reactions of Sulfides02:26

Preparation and Reactions of Sulfides

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Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.
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Hybridization of Atomic Orbitals II03:35

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sp3d and sp3d 2 Hybridization
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Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene01:13

Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene

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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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Diazonium Group Substitution with Halogens and Cyanide: Sandmeyer and Schiemann Reactions01:20

Diazonium Group Substitution with Halogens and Cyanide: Sandmeyer and Schiemann Reactions

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Arenediazonium substitution reactions occur when the diazonium group is substituted by various functional groups such as halides, hydroxyl, nitrile, etc. For instance, arenediazonium salts react with copper(I) salts of chloride, bromide, or cyanide to form corresponding aryl chlorides, bromides, and nitriles. These reactions are named Sandmeyer reactions. Although the mechanism of this reaction is complicated, as illustrated in Figure 1, they are believed to progress via an aryl copper...
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Alkyl Halides02:45

Alkyl Halides

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Structural Properties
Alkyl halides are halogen-substituted alkanes wherein one or more hydrogen atoms of an alkane is replaced by a halogen atom such as fluorine, chlorine, bromine, or iodine. The carbon atom in an alkyl halide is bonded to the halogen atom, which is sp3-hybridized and exhibits a tetrahedral shape.
Unlike alkyl halides, compounds in which a halogen atom is bonded to an sp2 -hybridized carbon atom of a carbon-carbon double bond (C=C) are called vinyl halides. Whereas aryl...
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Halogenation of Alkenes02:46

Halogenation of Alkenes

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Halogenation is the addition of chlorine or bromine across the double bond in an alkene to yield a vicinal dihalide. The reaction occurs in the presence of inert and non-nucleophilic solvents, such as methylene chloride, chloroform, or carbon tetrachloride.
Consider the bromination of cyclopentene. Molecular bromine is polarized in the proximity of the π electrons of cyclopentene. An electrophilic bromine atom adds across the double bond, forming a cyclic bromonium ion intermediate.
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One-Dimensional Sb(III) Halides with Orange Emission and White-Light Conversion Capability.

Mingyue Chen1, Kunjie Liu2, Yun Zhang2

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Two novel 1D organic-inorganic metal halides (OIMHs) were synthesized, with one exhibiting bright orange photoluminescence. This material was used to create a high-performance white LED, demonstrating potential for advanced solid-state lighting.

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Area of Science:

  • Materials Science
  • Solid-State Chemistry
  • Optoelectronics

Background:

  • Organic-inorganic metal halides (OIMHs) are recognized for their tunable properties and potential in optoelectronics.
  • Developing novel OIMHs with desirable photoluminescence is crucial for advanced material applications.
  • 1D OIMHs offer unique structural and electronic characteristics for optoelectronic research.

Purpose of the Study:

  • To design and synthesize new 1D organic-inorganic metal halide compounds.
  • To investigate the photoluminescence properties of the synthesized compounds.
  • To evaluate the potential of these materials in solid-state lighting applications.

Main Methods:

  • Synthesis of 1D compounds: (C5H14N2)3Sb4Cl18 and (C5H14N2)SbBr5.
  • Crystallographic analysis to determine space groups (P-1 and P212121).
  • Photoluminescence (PL) spectroscopy and density functional theory (DFT) calculations.

Main Results:

  • Successful synthesis of two 1D OIMHs, (C5H14N2)3Sb4Cl18 and (C5H14N2)SbBr5.
  • (C5H14N2)3Sb4Cl18 shows bright orange emission peaking at 630 nm, attributed to inorganic units.
  • Fabrication of a white LED using (C5H14N2)3Sb4Cl18 with a high color rendering index (93.8).

Conclusions:

  • The synthesized 1D OIMHs, particularly (C5H14N2)3Sb4Cl18, exhibit promising photoluminescence.
  • The material is suitable for fabricating high-performance white LEDs.
  • This research offers a potential pathway for developing cost-effective solid-state lighting solutions.