相关实验视频

Updated: Jul 5, 2025

[DPEPhosbcpCu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst

[DPEPhosbcpCu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst

Published on: May 21, 2019

光催化与限制相遇:对于光诱导的有机转化而言,这是一个新兴的机会

Yanke Hao¹, Yu-Lin Lu¹, Zhiwei Jiao¹

¹MOE Laboratory of Bioinorganic and Synthetic Chemistry, GBRCE for Functional Molecular Engineering, LIFM, IGCME, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, China.

Angewandte Chemie (International ed. in English)

|January 19, 2024

概括

光活性金属有机 (PMOCs) 是绿色有机转换的先进的酶模仿剂. 这些子使可见光光催化作用成为可能,通过电子或能量转移途径提供独特的选择性.

科学领域:

超分子化学超分子化学
光催化作用的光催化
有机合成有机合成

背景情况:

金属有机 (MOCs) 通过结合金属和有机成分来模仿酶催化剂.
MOCs创造了封闭的微环境,促进了独特的宿主-客人互动和有机转变.
光活性MOCs (PMOCs) 正在成为强大的超分子光催化剂.

研究的目的:

通过使用PMOC在过去二十年中审查光诱导激进反应的演变.
要突出从静电测量光反应到催化周转的发展.
强调向可见光激活和增强选择性的转变.

主要方法:

使用PMOC作为人工反应器用于光诱导的激进反应.
研究子中的光催化机制.
探索单电子转移 (SET) 和能量转移 (EnT) 路径.

主要成果:

PMOCs已经从UV驱动的静态度反应演变为可持续的可见光光催化剂.
与散装溶液相比,子限制导致不同的反应性和选择性.
在有机转化中,PMOCs表现出多层次的化学和立体选择性.

结论:

PMOC集成结构和功能生物模拟,用于多功能光反应.
它们提供了一种简单,绿色和可行的方法来应对有机合成中的挑战.
PMOCs显示了促进光催化有机转换的巨大潜力.

关键词:

封闭效应的封闭效应主机与客人的互动.金属有机子的使用方法有机转化有机转化光催化作用的光催化

更多相关视频

Cercosporin-Photocatalyzed [4+1]- and [4+2]-Annulations of Azoalkenes Under Mild Conditions

Cercosporin-Photocatalyzed [4+1]- and [4+2]-Annulations of Azoalkenes Under Mild Conditions

Published on: July 17, 2020

Light-driven Enzymatic Decarboxylation

Light-driven Enzymatic Decarboxylation

Published on: May 22, 2016

相关概念视频

Photochemical Electrocyclic Reactions: Stereochemistry

Photochemical Electrocyclic Reactions: Stereochemistry

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

Cycloaddition Reactions: MO Requirements for Photochemical Activation

Cycloaddition Reactions: MO Requirements for Photochemical Activation

Some cycloaddition reactions are activated by heat, while others are initiated by light. For example, a [2 + 2] cycloaddition between two ethylene molecules occurs only in the presence of light. It is photochemically allowed but thermally forbidden.

Thermal and Photochemical Electrocyclic Reactions: Overview

Thermal and Photochemical Electrocyclic Reactions: Overview

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.

Thermal Electrocyclic Reactions: Stereochemistry

Thermal Electrocyclic Reactions: Stereochemistry

The stereochemistry of electrocyclic reactions is strongly influenced by the orbital symmetry of the polyene HOMO. Under thermal conditions, the reaction proceeds via the ground-state HOMO.
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.

The Z-Scheme of Electron Transport in Photosynthesis

The Z-Scheme of Electron Transport in Photosynthesis

The light reactions of photosynthesis assume a linear flow of electrons from water to NADP+. During this process, light energy drives the splitting of water molecules to produce oxygen. However, oxidation of water molecules is a thermodynamically unfavorable reaction and requires a strong oxidizing agent. This is accomplished by the first product of light reactions: oxidized P680 (or P680+), the most powerful oxidizing agent known in biology. The oxidized P680 that acquires an electron from the...

Pericyclic Reactions: Introduction

Pericyclic Reactions: Introduction

Pericyclic reactions are organic reactions that occur via a concerted mechanism without generating any intermediates. The reactions proceed through the movement of electrons in a closed loop to form a cyclic transition state, where rearrangement of the σ and π bonds yields specific products.
Pericyclic reactions can be classified into three categories: electrocyclic reactions, cycloaddition reactions, and sigmatropic rearrangements. Electrocyclic reactions and sigmatropic...