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Related Concept Videos

Nomenclature of Alkenes02:29

Nomenclature of Alkenes

The IUPAC naming system for alkenes replaces -an- with -en- in the corresponding parent alkanes. Accordingly, a simple alkene replaces the -ane suffix of the alkane with -ene.
As per the IUPAC rules, the longest carbon chain containing the maximum number of double bonds is identified as the parent chain and is numbered such that the doubly bonded carbon atoms receive the lowest possible numbers. The location of the double bond is indicated by the number of its first carbon atom. In branched...
Nomenclature of Alkynes02:39

Nomenclature of Alkynes

Alkynes are unsaturated hydrocarbons characterized by the presence of carbon-carbon triple bonds and have a general formula CnH2n-2. The nomenclature of alkynes follows a set of rules similar to alkanes and alkenes; however, alkynes bear the suffix "-yne" instead of "-ane" or "-ene." There are two approaches to naming alkynes:
Structure of Conjugated Dienes01:16

Structure of Conjugated Dienes

Introduction
Conjugated dienes are compounds characterized by the presence of alternating double and single bonds. In a conjugated system like 1,3-butadiene, the unhybridized 2p orbital on each carbon overlaps continuously, allowing the π electrons to be delocalized across the entire molecule. In contrast, this type of overlap does not occur in cumulated and isolated dienes, such as 2,3-pentadiene and 1,4-pentadiene, respectively. Instead, the π electrons remain localized between the double...
Aromatic Hydrocarbon Anions: Structural Overview01:18

Aromatic Hydrocarbon Anions: Structural Overview

Neutral hydrocarbons like cyclopentadiene with an odd number of carbon atoms and one intervening CH2 group in the ring are not aromatic. Cyclopentadiene with 4 π electrons does not satisfy the 4n + 2 π electron rule. Additionally, the intervening CH2 group is sp3 hybridized and lacks a vacant p orbital, thereby interrupting the overlap of p orbitals in a continuous manner and preventing the delocalization of π electrons throughout the ring.
Due to the absence of continuous overlap of p...
Aryldiazonium Salts to Azo Dyes: Diazo Coupling01:11

Aryldiazonium Salts to Azo Dyes: Diazo Coupling

The reaction of weakly electrophilic aryldiazonium (also called arenediazonium) salts with highly activated aromatic compounds leads to the formation of products with an —N=N— link, called an azo linkage. This reaction, presented in Figure 1, is known as diazo coupling and occurs without the loss of the nitrogen atoms of the aryldiazonium salt. Highly activated aromatic compounds such as phenols or arylamines favor the diazo coupling reaction. The coupling generally occurs at the para position.
Characteristics and Nomenclature of Copolymers01:24

Characteristics and Nomenclature of Copolymers

Copolymers are the products obtained from the polymerization of multiple monomer species. So, in a polymer chain itself, there can be multiple repeating units that come from different monomers. The process of synthesizing a polymer from different monomer species is called copolymerization. When two monomers are involved, the polymer is known as a bipolymer. Polymers with three and four monomers are termed terpolymers and quaterpolymers, respectively. Figure 1 depicts the copolymerization of...

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Preparation of a Corannulene-functionalized Hexahelicene by Copper(I)-catalyzed Alkyne-azide Cycloaddition of Nonplanar Polyaromatic Units
09:35

Preparation of a Corannulene-functionalized Hexahelicene by Copper(I)-catalyzed Alkyne-azide Cycloaddition of Nonplanar Polyaromatic Units

Published on: September 18, 2016

Corannurylene Pentapetalae.

Dong Meng1,2, Guogang Liu2,3, Chengyi Xiao4

  • 1Key Laboratory of Organic Optoelectronics and Molecular Engineering, Department of Chemistry , Tsinghua University , Beijing 100084 , China.

Journal of the American Chemical Society
|March 9, 2019
PubMed
Summary
This summary is machine-generated.

Researchers synthesized a novel nonplanar graphenoid, corannurylene pentapetalae (CRP), using perylene diimide (PDI) fragments and a corannulene core. The D5-symmetric structure shows potential for electron transport via its unique honeycomb lattice.

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1,3,5-Triphenylbenzene and Corannulene as Electron Receptors for Lithium Solvated Electron Solutions
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Area of Science:

  • Materials Science
  • Organic Chemistry
  • Nanotechnology

Background:

  • Significant advances in synthesizing nonplanar graphenoids exist.
  • Challenges remain in understanding structure-property relationships, particularly intermolecular interactions.

Purpose of the Study:

  • To present a novel nonplanar graphenoid, corannurylene pentapetalae (CRP).
  • To investigate the structural features and intermolecular interactions of CRP.
  • To explore the potential of CRP in electronic devices.

Main Methods:

  • Bottom-up synthesis involving perylene diimide (PDI) planar fragments and a corannulene curved core.
  • Single crystal X-ray diffraction for structural elucidation.
  • Fabrication and testing of transistor devices.

Main Results:

  • Two distinct CRP structures were identified: D5-symmetric and C2-symmetric.
  • The D5-symmetric CRP exhibits a unique, alternately stacked chiral honeycomb lattice.
  • The C2-symmetric CRP forms dimer units through π-π stacking.
  • Transistor devices showed that the D5-symmetric CRP's honeycomb lattice facilitates electron transport even without π-π stacking.

Conclusions:

  • Corannurylene pentapetalae (CRP) represents a novel class of nonplanar graphenoids.
  • The D5-symmetric CRP's honeycomb structure is promising for electron transport applications.
  • This work advances the understanding of structure-property relationships in complex graphenoids.