![[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)
アイアンフォトレドックス触媒 - 過去,現在,未来
Lisa H M de Groot1, Aleksandra Ilic1, Jesper Schwarz1
1Centre for Analysis and Synthesis, Lund University, Lund SE-22100, Sweden.
Journal of the American Chemical Society
|April 20, 2023
まとめ
鉄光還元触媒は,環境にやさしい,費用対効果の高い有機合成を提供します. この展望は,リガンド設計と局所複合体生成に焦点を当てて,貴金属と競合する反応性を持つ鉄触媒を開発するための主要な戦略をレビューします.
科学分野:
- 有機化学
- キャタリシス
- 持続可能な化学
背景:
- フォトレドックス触媒は有機合成に不可欠です
- 高貴な金属の触媒は 効果的ですが 高価で 毒性があります
- 鉄基の光還元触媒は 持続可能で大きな可能性を秘めています
研究 の 目的:
- 鉄基光還元触媒の最近の進歩の概要と評価を提供すること.
- 鉄触媒で高い反応性を達成するための主要な戦略を特定し,議論する.
- この分野の将来的な発展の見通しを提供するためです.
主な方法:
- 鉄光還元触媒に関する既存の文献のレビューと分析.
- 鉄触媒の性能を向上させるための3つの主要な戦略を特定する.
- 触媒設計,インサイト生成,およびリガンド改変のアプローチの評価.
主要な成果:
- 鉄光レドックス触媒の3つの主要な戦略が特定されました:直接の鉄複合体置換,in situ複合体生成,および改善されたリガンド設計.
- これらの戦略により,鉄触媒は貴金属触媒に匹敵する反応性を得ることができる.
- 最近の開発は,鉄複合体の興奮状態の特性と酸化還元能力の強化に焦点を当てています.
結論:
- 鉄基のフォトレドックス触媒は,環境と経済に大きな利益をもたらす急速に進歩する分野です.
- 鉄の触媒的可能性を解き放つには,戦略的なリガンド設計と in situ 複合体の形成が不可欠です.
- 鉄のフォトレドックス触媒の範囲と効率を拡大し,貴金属システムと競合することを約束しています.
関連する概念動画
01:23Redox Equilibria: Overview
602
A reduction-oxidation reaction is commonly called a redox reaction. In a redox reaction, electrons are transferred from one species to another rather than being shared between or among atoms. The reducing agent or reductant is the species that loses electrons and gets oxidized in the process. The species that gains electrons and gets reduced in the process is the oxidizing agent or oxidant. Redox reactions are represented as two separate equations called half-reactions, where one equation...
602
01:26Thermal and Photochemical Electrocyclic Reactions: Overview
2.4K
Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
2.4K
01:17Oxidation of Phenols to Quinones
3.2K
In the presence of oxidizing agents, phenols are oxidized to quinones. Quinones can be easily reduced back to phenols using mild reducing agents. The electron-donating hydroxyl group enhances the reactivity of the aromatic ring, enabling oxidation of the ring even in the absence of an α hydrogen.
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox...
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox...
3.2K
01:26Photochemical Electrocyclic Reactions: Stereochemistry
1.9K
The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
Selection Rules: Photochemical Activation
1.9K
01:19Phase I Oxidative Reactions: Overview
320
Phase I biotransformation, or functionalization, is a crucial chemical process that converts drugs and other xenobiotics into more water-soluble forms, facilitating expulsion from the body. It involves oxidative, reductive, and hydrolytic reactions that add or unveil polar functional groups on lipophilic substrates. Key players in phase I reactions are the mixed-function oxidases. Situated in liver cell microsomes, these enzymes predominantly carry out drug metabolism. They require molecular...
320
01:29The Photochemical Reaction Center
4.2K
Reaction centers are pigment-protein complexes that initiate energy conversion from photons to chemical entities. Therefore, photochemical reaction center is a more appropriate term that describes these complexes. The Nobel laureates Robert Emerson and William Arnold provided the first experimental evidence of photochemical reaction centers by demonstrating the participation of nearly 2,500 chlorophyll molecules for the release of just one molecule of oxygen. Despite thousands of photosynthetic...
4.2K