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Updated: Jun 10, 2025

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

Published on: October 5, 2019

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结构上锁定的高晶共价三氧化物框架使过氧化的整体光合作用显著

Ling Zhang1, Congxu Wang1, Qike Jiang2

  • 1School of Engineering, Westlake University, Hangzhou 310024, Zhejiang Province, China.

Journal of the American Chemical Society
|October 17, 2024
PubMed
概括

研究人员开发了一种使用晶体共价三氧化物 (CTF) 生产绿色过氧化物 (H2O2) 的新方法. 这种策略增强了水和氧的H2O2的直接光合作用,使用无金属光催化剂实现了高效率.

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Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts05:47

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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.
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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.
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