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

Molecular Shapes

Molecular Shapes

Molecules have characteristic shapes that are crucial for their function. The arrangement of various electron groups around the central atom dictates their molecular geometry. Electron pairs in the valence shell of a central atom will adopt an arrangement that minimizes repulsions between the electron pairs by maximizing the distance between them. The valence electrons form either bonding pairs, located primarily between bonded atoms, or lone pairs.Two regions of electron density in a diatomic...

You might also read

Related Articles

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

Sort by

Same author

Conformational Landscapes in the Ground and Excited States Dictate Circularly Polarized Excimer Emission: A Thermodynamic-Kinetic Interplay in Carbazole Dimer Systems.

Angewandte Chemie (International ed. in English)·2026

Same author

Vinyltrimethylsilane Chemical Ionization Tandem Mass Spectrometry Separates Methoxyphenylpiperazine Isomers.

Analytical chemistry·2026

Same author

Color variation in radio-luminescence of P-dots doped with thermally activated delayed fluorescence molecules.

Physical chemistry chemical physics : PCCP·2025

Same author

Inversion of circularly polarized luminescence by electric current flow during transition.

Physical chemistry chemical physics : PCCP·2024

Same author

Significance of Vibronic Coupling that Shapes Circularly Polarized Luminescence of Double Helicenes.

Angewandte Chemie (International ed. in English)·2024

Same author

Supramolecular nanosheet formation-induced photosensitisation mechanism change of Rose Bengal dye in aqueous media.

Chemical communications (Cambridge, England)·2024

Search research articles

Related Experiment Video

Updated: Jun 25, 2026

Engineering Molecular Recognition with Bio-mimetic Polymers on Single Walled Carbon Nanotubes

Engineering Molecular Recognition with Bio-mimetic Polymers on Single Walled Carbon Nanotubes

Published on: January 10, 2017

Small molecule helical emitters.

¹Research Center for Environmental Preservation and Department of Applied Chemistry, Graduate School of Engineering, The University of Osaka, 2-4, Yamada-oka, Suita, Osaka 565-0871, Japan. tmori@epc.osaka-u.ac.jp.

Chemical Society Reviews

|January 6, 2026

Summary

Researchers are designing chiral emitters for advanced optical technologies. Molecular engineering strategies, including helical structures and exciton coupling, significantly enhance circularly polarized luminescence (CPL) factors for improved performance.

More Related Videos

Synthesis and Characterization of 1,2-Dithiolane Modified Self-Assembling Peptides

Synthesis and Characterization of 1,2-Dithiolane Modified Self-Assembling Peptides

Published on: August 20, 2018

Light-driven Molecular Motors on Surfaces for Single Molecular Imaging

Light-driven Molecular Motors on Surfaces for Single Molecular Imaging

Published on: March 13, 2019

Related Experiment Videos

Last Updated: Jun 25, 2026

Engineering Molecular Recognition with Bio-mimetic Polymers on Single Walled Carbon Nanotubes

Engineering Molecular Recognition with Bio-mimetic Polymers on Single Walled Carbon Nanotubes

Published on: January 10, 2017

Synthesis and Characterization of 1,2-Dithiolane Modified Self-Assembling Peptides

Synthesis and Characterization of 1,2-Dithiolane Modified Self-Assembling Peptides

Published on: August 20, 2018

Light-driven Molecular Motors on Surfaces for Single Molecular Imaging

Light-driven Molecular Motors on Surfaces for Single Molecular Imaging

Published on: March 13, 2019

Area of Science:

Materials Science
Organic Chemistry
Photophysics

Background:

Circularly polarized luminescence (CPL) is crucial for next-generation optical technologies.
Achieving high luminescence dissymmetry (gCPL) factors in chiral emitters is a key challenge.
Practical gCPL values in small organic molecules have historically been very low (<0.001).

Purpose of the Study:

To outline molecular design strategies for enhancing CPL emitters.
To explore methods for increasing the gCPL factor beyond 0.01.
To demonstrate breakthroughs in rationally engineered chiral molecules.

Main Methods:

Designing rigid, helical molecules with high symmetry to align electric and magnetic dipole moments.
Engineering macrocyclic molecules to act as molecular solenoids, increasing magnetic dipole moments.
Utilizing exciton coupling in chiral arrangements of chromophores to generate strong rotational strength.

Main Results:

Significant enhancement of gCPL factors, exceeding the 0.01 threshold.
Demonstration of parallel electric and magnetic dipole moments in helical structures.
Generation of powerful magnetic moments in macrocyclic and exciton-coupled systems.

Conclusions:

Targeted molecular engineering is key to advancing CPL materials.
Fundamental photophysical principles are directly translatable into synthetic molecular designs.
Current high-performance CPL materials validate core design strategies, despite synthetic complexity.