Related Experiment Video
Updated: Dec 13, 2025
![Cercosporin-Photocatalyzed [4+1]- and [4+2]-Annulations of Azoalkenes Under Mild Conditions](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F60786.jpg&w=3840&q=50)
Cercosporin-Photocatalyzed [4+1]- and [4+2]-Annulations of Azoalkenes Under Mild Conditions
Published on: July 17, 2020
Transition metal complexes incorporated with photoswitchable azo-based benzimidazole ligands: Photochromic and
Harshawardhan Agarkar1, Dhwanit Dave1, Dipanwita Das1
1Department of Chemistry, Institute of Chemical Technology, Matunga, Mumbai 400019, India.
Abstract:
Photochromic compounds are well-known for their promising applications in many areas. It attracts remarkable attention because of their potential ability for optical memory media and optical switching devices. Herein, we have synthesized azo-based benzimidazole ligand and their transition metal complexes for photochromic applications in the liquid state. The azo-based benzimidazole ligand exhibits trans-to-cis photoisomerization with highly tunable and excellent π-π* and n-π* band separation of ligand, whereas complexes show light-induced photo-dissociation as well as trans-to-cis photoisomerization of the ligand part. The reverse cis-to-trans isomerization can be driven by without using light or any external stimuli at room temperature by keeping the system in the dark condition.
More Related Videos
Related Concept Videos
Aryldiazonium Salts to Azo Dyes: Diazo Coupling
Colors and Magnetism
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
Complexometric Titration: Overview
Complexometric Titration: Ligands
Photochemical Electrocyclic Reactions: Stereochemistry
Selection Rules: Photochemical Activation
Complexation Equilibria: The Chelate Effect

