Related Experiment Video
Updated: Jun 6, 2026

Scale-up Chemical Synthesis of Thermally-activated Delayed Fluorescence Emitters Based on the Dibenzothiophene-S,S-Dioxide Core
Published on: October 24, 2017
Substrate Self-Excitation Reaction Driven by Visible Light To Access Benzo[b]fluorene Derivatives
Long-Xue Wang1, Yu-Ting Wang1, Yu-Han Zhang1
1College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China.
Abstract:
A photosensitizer-free methodology has been developed for the synthesis of benzo[b]fluorene derivatives via visible-light-driven substrate self-excitation, using light as the sole energy source. The mechanism was mechanistically investigated, including control experiments, optical experiments, deuterium labeling experiments, and DFT calculations. A series of extended π-conjugated systems derived from readily available indanones, aldehydes, and malononitriles were converted into benzo[b]fluorene derivatives.
Related Concept Videos
Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene
Photochemical Electrocyclic Reactions: Stereochemistry
Selection Rules: Photochemical Activation
Photoluminescence: Fluorescence and Phosphorescence
A pair of electrons in a...
Cycloaddition Reactions: MO Requirements for Photochemical Activation
Variables Affecting Phosphorescence and Fluorescence
Nucleophilic Aromatic Substitution: Elimination–Addition
