相关实验视频

Updated: May 28, 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

确定光化学衍生的一电子减小物种的形成效率的主要因素

Naoki Hosokawa¹, Kyohei Ozawa¹, Kazuhide Koike²

¹Department of Chemistry, School of Science, Institute of Science Tokyo (Tokyo Institute of Technology) 2-12-1-NE-2 O-okayama, Meguro-ku Tokyo 152-8550 Japan.

Chemical science

|February 10, 2025

概括

光诱导电子转移的驱动力是光催化中一个电子减少物种 (OERSs) 的量子产量的关键. 更高的驱动力促进了电子转移,提高了OERS形成和分离效率.

科学领域:

摄影化学的使用.
催化剂是一种催化剂.
无机化学无机化学有机化学

背景情况:

光敏剂衍生的一电子减小物种 (OERS) 的量子产量对于氧化还原光敏化光催化反应至关重要.
影响OERS形成量子产量的因素尚不清楚.

研究的目的:

系统地比较各种金属复合物的光化学OERS形成量子产量.
确定控制OERS形成量子收益率的主要因素.

主要方法:

研究了Ru (ii),Os (ii),Re (i) 和Ir (iii) 复合物与一致的BIH降解剂.
检查了兴奋状态的减少潜力,重原子效应和OERS氧化潜力/电荷.

主要成果:

光诱导电子转移的驱动力是决定OERS形成量子产量的主要因素.
较高的兴奋状态氧化功率与相对于火效率的OERS形成量子产量增加有关.

结论:

增加的光诱导电子转移强电性促进了电子在更远的距离上转移.
这种增强的电子转移导致OERS和氧化BIH物种的更有效的分离.

更多相关视频

Determination of the Photoisomerization Quantum Yield of a Hydrazone Photoswitch

Determination of the Photoisomerization Quantum Yield of a Hydrazone Photoswitch

Published on: February 7, 2022

Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions

Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions

Published on: October 5, 2019

相关概念视频

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...

Oxidation and Reduction of Organic Molecules

Oxidation and Reduction of Organic Molecules

Energy production within a cell involves many coordinated chemical pathways. Most of these pathways are combinations of oxidation and reduction reactions, which occur at the same time. An oxidation reaction strips an electron from an atom in a compound, and the addition of this electron to another compound is a reduction reaction. Because oxidation and reduction usually occur together, these pairs of reactions are called redox reactions.
The removal of an electron from a molecule, results in a...

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

Role of Reduced Coenzymes NADH and FADH₂

Role of Reduced Coenzymes NADH and FADH₂

The energy released from the breakdown of the chemical bonds within nutrients can be stored either through the reduction of electron carriers or in the bonds of adenosine triphosphate (ATP). In living systems, a small class of compounds functions as mobile electron carriers, molecules that bind to and shuttle high-energy electrons between compounds in pathways. The principal electron carriers that will be considered originate from the B vitamin group and are derivatives of nucleotides; they are...

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.

Predicting Reaction Outcomes

Predicting Reaction Outcomes

Kinetics describes the rate and path by which a reaction occurs. In contrast, thermodynamics deals with state functions and describes the properties, behavior, and components of a system. It is not concerned with the path taken by the process and cannot address the rate at which a reaction occurs. Although it does provide information about what can happen during a reaction process, it does not describe the detailed steps of what appears on an atomic or a molecular level. On the other hand,...