Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Structure of Benzene: Molecular Orbital Model

Structure of Benzene: Molecular Orbital Model

According to the molecular orbital (MO) model, benzene has a planar structure with a regular hexagon of six sp2 hybridized carbons. As shown in Figure 1, each carbon is bonded to three other atoms with C–C–C and H–C–C bond angles of 120°. The C–H bond length is 109 pm, and the C–C bond length is 139 pm which is midway between the single bond length of sp3 hybridized carbons (154 pm) and sp2 hybridized carbons (133 pm).

Structure and Physical Properties of Alkynes

Structure and Physical Properties of Alkynes

Introduction:
In nature, compounds containing both carbon and hydrogen are known as "hydrocarbons". Aliphatic hydrocarbons are compounds whose molecules contain saturated single bonds (i.e., alkanes) or unsaturated double or triple bonds. Alkenes contain carbon–carbon double bonds and have a structural formula CnH2n. Unsaturated hydrocarbons containing carbon–carbon triple bonds are called "alkynes" and are structurally represented by the formula CnH2n-2.
The...

Hybridization of Atomic Orbitals I

Hybridization of Atomic Orbitals I

The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...

Hybridization of Atomic Orbitals II

Hybridization of Atomic Orbitals II

sp3d and sp3d 2 Hybridization

Structure of Benzene: Kekulé Model

Structure of Benzene: Kekulé Model

In 1865, August Kekule suggested the structure of benzene according to the structural theory of organic chemistry based on the three assertions—formula of benzene is C6H6, all the hydrogens of benzene are equivalent, and each carbon must have four bonds due to its tetravalency.
He proposed that benzene has a cyclic structure of six carbon atoms attached to one hydrogen atom each, with three alternating pi bonds.

π Molecular Orbitals of 1,3-Butadiene

π Molecular Orbitals of 1,3-Butadiene

Conjugated dienes have lower heats of hydrogenation than cumulated and isolated dienes, making them more stable. The enhanced stabilization of conjugated systems can be understood from their π molecular orbitals.
The simplest conjugated diene is 1,3-butadiene: a four-carbon system where each carbon is sp2-hybridized and has an unhybridized p orbital that contains an unpaired electron. According to molecular orbital theory, atomic orbitals combine to form molecular orbitals such that the...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

BN-Embedded Dibenzoullazine: Synthesis, Structures, and Properties.

Organic letters·2026

Same author

Controlled Synthesis of Cyclopenta-Fused B<sub>2</sub>N<sub>2</sub>-Pyrene and Diazaborepin: Structures and Photophysical Properties.

Organic letters·2026

Same author

Diversified Construction of Benzothiophene-Fused Pyridazinone via a Skeletal Editing and Pyridine Migration Domino Process and DFT Studies.

Organic letters·2026

Same author

Skeletal Editing of Isoquinolines Via CN/CC Atom-Pair Swap Enables the Synthesis of 3-Arylthio-2-O-acylated Naphthols and DFT Studies.

Organic letters·2026

Same author

Bis-Boron/Nitrogen-Doped Azaullazines: Synthesis, Structures, and Their Emitting Properties.

The Journal of organic chemistry·2025

Same author

Construction of Benzothiophene-Fused 1,2,4-Triazocines via a Skeletal Editing Strategy and DFT Study on the Reaction Mechanism.

Organic letters·2025

Same journal

Aptamer-powered surveillance of SARS-CoV-3.

Chemical communications (Cambridge, England)·2026

Same journal

Does aurophilicity exist beyond the solid state?

Chemical communications (Cambridge, England)·2026

Same journal

Pressure-induced emission enhancement in 2-(anthracen-9-yl)-9<i>H</i>-thioxanthen-9-one crystals with π-π stacked thioxanthone dimers.

Chemical communications (Cambridge, England)·2026

Same journal

A Co-peptoid electrocatalyst for nitrite reduction that enables selective production of ammonia.

Chemical communications (Cambridge, England)·2026

Same journal

An AIE-based fluorescent probe for selective and sensitive detection of <i>N</i>-bromosuccinimide.

Chemical communications (Cambridge, England)·2026

Same journal

Harnessing the heteroatomic S/P coordination effects of FeCo dual-atomic catalysts for enhanced ORR performance.

Chemical communications (Cambridge, England)·2026

See all related articles

Search research articles

Related Experiment Video

Updated: Apr 15, 2026

Preparation of a Corannulene-functionalized Hexahelicene by CopperI-catalyzed Alkyne-azide Cycloaddition of Nonplanar Polyaromatic Units

Preparation of a Corannulene-functionalized Hexahelicene by CopperI-catalyzed Alkyne-azide Cycloaddition of Nonplanar Polyaromatic Units

Published on: September 18, 2016

Bis-BN-embedded [4]helicenes: synthesis, structures and properties.

Bingkang Liu¹, Jiahao Cui², Xiaoming Wu²

¹Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, People's Republic of China. chenglongli1991@email.tjut.edu.cn.

Chemical Communications (Cambridge, England)

|April 14, 2026

Summary

This summary is machine-generated.

Researchers synthesized novel bis-boron nitride (BN)-embedded [4]helicenes with twisted structures. These compounds show enhanced fluorescence and potential for blue organic light-emitting diodes (OLEDs).

More Related Videos

Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides

Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides

Published on: November 21, 2013

Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives

Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives

Published on: February 7, 2017

Related Experiment Videos

Last Updated: Apr 15, 2026

Preparation of a Corannulene-functionalized Hexahelicene by CopperI-catalyzed Alkyne-azide Cycloaddition of Nonplanar Polyaromatic Units

Preparation of a Corannulene-functionalized Hexahelicene by CopperI-catalyzed Alkyne-azide Cycloaddition of Nonplanar Polyaromatic Units

Published on: September 18, 2016

Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides

Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides

Published on: November 21, 2013

Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives

Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives

Published on: February 7, 2017

Area of Science:

Organic Chemistry
Materials Science
Supramolecular Chemistry

Background:

Helicenes are chiral aromatic hydrocarbons with unique photophysical properties.
Boron nitride (BN) incorporation can tune electronic and optical characteristics of organic molecules.
Developing novel emissive materials for organic light-emitting diodes (OLEDs) is crucial for display technology.

Purpose of the Study:

To synthesize novel bis-boron nitride (BN)-embedded [4]helicenes.
To investigate the structural, photophysical, and electronic properties of these new compounds.
To evaluate their potential application as emissive layers in blue organic light-emitting diodes (OLEDs).

Main Methods:

Sequential nitrogen-directed electrophilic borylation strategy for synthesis.
Single-crystal X-ray diffraction for structural elucidation.
Photoluminescence spectroscopy to determine fluorescence quantum yields.
Fabrication and characterization of prototype blue OLED devices.

Main Results:

Successful synthesis of a series of bis-BN-embedded [4]helicenes.
Confirmation of highly twisted helical frameworks via X-ray diffraction.
Demonstrated precise modulation of frontier orbital energy levels by BN embedding.
Significantly enhanced fluorescence quantum yields observed.
Preliminary fabrication of blue OLEDs using compounds 4a and 4b as emissive layers.

Conclusions:

Bis-BN-embedded [4]helicenes represent a novel class of helical compounds with tunable electronic properties.
BN incorporation is an effective strategy to enhance fluorescence and modulate energy levels in helicenes.
These compounds show promise as efficient blue emitters for organic light-emitting diode (OLED) applications.