Photosensitizer - Wikipedia
网页Photosensitizers are light absorbers that alter the course of a photochemical reaction. They usually are catalysts. [1] . They can function by many mechanisms, sometimes they donate an electron to the substrate, sometimes they abstract a hydrogen atom from the substrate.
The photophysics of photosensitization: A brief overview
网页2021年9月1日 — The photophysical properties desirable in a photosensitizer and the kinetic aspects of the diffusional encounter of sensitizer and energy acceptor are outlined, together with the role of spin selection rules in photosensitization processes, with emphasis on the photosensitized formation of singlet oxygen, the key photophysical step in Type II ...
Photosensitized O2 enables intermolecular alkene …
网页2023年8月3日 — Mechanistic investigations indicate that photosensitized O 2 plays a vital role in the generation of carbon-centered radicals for both the addition of active methylene compounds to alkenes and the ring closure. Cyclopropanes are highly valuable and versatile intermediates in the synthesis of complex molecules and natural products (1 – 3).
Photochemical reaction - Photosensitization, Light Activation ...
网页Photosensitized molecular oxygen is a powerfully oxidative species that severely hampers the photosynthetic efficiency of plants and causes health problems such as cataracts in humans.
Photosensitization | Photodynamic Therapy, Light Therapy
网页Photosensitization, the process of initiating a reaction through the use of a substance capable of absorbing light and transferring the energy to the desired reactants. The technique is commonly employed in photochemical work, particularly for reactions requiring light sources of certain.
Photosensitization Reactions of Biomolecules: Definition, …
网页We propose that in biological systems, the terms photosensitization reaction (or process), photosensitized reaction (or process) and, simply, photosensitization should be considered synonymous and can be defined as a process by which a chemical change occurs in one compound, the substrate or target, as a result of initial electronic absorption o...
Photosensitization enables Pauson-Khand–type reactions with …
网页2024年2月1日 — The Pauson-Khand reaction has in the past 50 years become one of the most common cycloaddition reactions in chemistry. Coupling two unsaturated bonds with carbon monoxide, the transformation remains limited to CO as a C 1 building block. Herein we report analogous cycloaddition reactions with nitrenes as an N 1 unit.
Nano-photosensitizer based on layered double hydroxide and ... - Nature
网页2018年7月18日 — Over the past decades, a number of photosensitizers, including organic dyes, metal–organic complexes (i.e., porphyrins and phthalocyanine), and noble metal nanoparticles have been exploited in the...
Type I and Type II Photosensitized Oxidation Reactions: Guidelines and ...
网页2017年1月13日 — Type I and type II photosensitized reactions include biomolecule degradation upon one-electron oxidation and 1 O 2 reactions. Type I sensitizers undergo photoinduced electron transfer. For example, carbonyl compounds such as benzophenone are photosensitizers, where photoexcited benzophenone has also been shown to act by hydrogen atom abstraction.
Photosensitized Reaction - an overview | ScienceDirect Topics
网页Photosensitized reactions refer to indirect photochemical reactions in which a photosensitizer molecule absorbs light and induces chemical changes in another chemical species, leading to the generation of reactive forms of small inorganic molecules.
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