Related Experiment Video
Updated: Oct 16, 2025
![[DPEPhosbcpCu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F59739.jpg&w=3840&q=50)
[DPEPhosbcpCu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst
Published on: May 21, 2019
Barrier-Lowering Effects of Baird Antiaromaticity in Photoinduced Proton-Coupled Electron Transfer (PCET) Reactions
Lucas J Karas1, Chia-Hua Wu1, Judy I Wu1
1Department of Chemistry, University of Houston, Houston, Texas 77204, United States.
Abstract:
Many popular organic chromophores that catalyze photoinduced proton-coupled electron transfer (PCET) reactions are aromatic in the ground state but become excited-state antiaromatic in the lowest ππ* state. We show that excited-state antiaromaticity makes electron transfer easier. Two representative photoinduced electron transfer processes are investigated: (1) the photolysis of phenol and (2) solar water splitting of a pyridine-water complex. In the selected reactions, the directions of electron transfer are opposite, but the net result is proton transfer following the direction of electron transfer. Nucleus-independent chemical shifts (NICS), ionization energies, electron affinities, and PCET energy profiles of selected [4n] and [4n + 2] π-systems are presented, and important mechanistic implications are discussed.
More Related Videos
08:23Analyzing the Photo-oxidation of 2-propanol at Indoor Air Level Concentrations Using Field Asymmetric Ion Mobility Spectrometry
Published on: June 14, 2018
10:21Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions
Published on: October 5, 2019
Related Concept Videos
π Electron Effects on Chemical Shift: Aromatic and Antiaromatic Compounds
Photochemical Electrocyclic Reactions: Stereochemistry
Selection Rules: Photochemical Activation
π Electron Effects on Chemical Shift: Overview
Benzene to 1,4-Cyclohexadiene: Birch Reduction Mechanism
Aromatic Hydrocarbon Anions: Structural Overview
Due to the absence of continuous...
ortho–para-Directing Activators: –CH3, –OH, –⁠NH2, –OCH3