Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

The Z-Scheme of Electron Transport in Photosynthesis01:34

The Z-Scheme of Electron Transport in Photosynthesis

9.7K
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...
9.7K
Photochemical Electrocyclic Reactions: Stereochemistry01:26

Photochemical Electrocyclic Reactions: Stereochemistry

1.8K
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
1.8K
Photosystem I01:27

Photosystem I

61.4K
Although structurally similar to photosystem II (PSII), photosystem I (PSI) is has a different electron supplier and electron acceptor.
Both these photosystems work in concert. An excited electron from PSII is relayed to PSI via an electron transport chain in the thylakoid membrane of the chloroplast, which is comprised of the carrier molecule plastoquinone, the dual-protein cytochrome complex, and plastocyanin. As electrons move between PSII and PSI, they lose energy and must be re-energized...
61.4K
The Photochemical Reaction Center01:29

The Photochemical Reaction Center

4.0K
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...
4.0K
Cycloaddition Reactions: MO Requirements for Photochemical Activation01:12

Cycloaddition Reactions: MO Requirements for Photochemical Activation

2.0K
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.
2.0K
Photosystem II01:22

Photosystem II

69.4K
The multi-protein complex photosystem II (PS II) harvests photons and transfers their energy through its bound pigments to its reaction center, and ultimately to photosystem I (PSI) through the electron transport chain. The pigments responsible for caputirng the light energy in photosystems include chlorophyll a, chlorophyll b, and carotenoids.
The pigment molecules are arranged across  two photosystem domains — the antenna complex and the reaction center. The main aim of the pigment...
69.4K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Aggregation-Induced Emission Governed by Self-Assembly Pathways in NHC-Au(I) Carbazolate Complexes.

Inorganic chemistry·2026
Same author

Supramolecular dye polymers for aggregation-induced photocatalysis.

Nature chemistry·2026
Same author

Out-of-Equilibrium Supramolecular Assembly Sustained by Photocatalysis.

Angewandte Chemie (International ed. in English)·2026
Same author

From solution to thin films: unravelling excited-state behaviour in halogenated diradicaloids.

Chemical communications (Cambridge, England)·2026
Same author

Hydrophobic Surface Treatment for the Protection of Carparo Stone.

Polymers·2026
Same author

Hidden Diradical: Conformational Switch for Solvatochromic NIR Emission With Unity Quantum Yield in Thiele's Hydrocarbon.

Angewandte Chemie (International ed. in English)·2026
Same journal

Sub1 contributes to heart failure with preserved ejection fraction driven by aging in mice.

Nature communications·2026
Same journal

The BRCA1-A complex restricts replication fork reversal-dependent DNA repair in ATM deficient cells.

Nature communications·2026
Same journal

Signaling downstream of tumor-stroma interaction regulates mucinous colorectal adenocarcinoma apicobasal polarity.

Nature communications·2026
Same journal

Click-polymerized polyenamine membranes for efficient lithium extraction.

Nature communications·2026
Same journal

Joint trajectories of brain atrophy, white matter hyperintensities and cognition quantify brain maintenance.

Nature communications·2026
Same journal

Proton shuttling at electrochemical interfaces under alkaline hydrogen evolution.

Nature communications·2026
查看所有相关文章

相关实验视频

Updated: May 13, 2025

Photochemical Oxidative Growth of Iridium Oxide Nanoparticles on CdSe@CdS Nanorods
05:41

Photochemical Oxidative Growth of Iridium Oxide Nanoparticles on CdSe@CdS Nanorods

Published on: February 11, 2016

9.5K

红氧驱动的光选择性自组装装置.

Dario Alessi1, Luca Morgan1, Elisa Pelorosso1

  • 1Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131, Padova, Italy.

Nature communications
|May 9, 2025
PubMed
概括
此摘要是机器生成的。

研究人员开发了一种新的方法,使用氧化还原反应来控制复合物的自我组装. 这个过程产生发光凝和纤维,为先进的功能材料提供了新的可能性.

更多相关视频

[DPEPhosbcpCu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst
09:12

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

Published on: May 21, 2019

9.1K
Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts
05:47

Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts

Published on: August 7, 2018

7.6K

相关实验视频

Last Updated: May 13, 2025

Photochemical Oxidative Growth of Iridium Oxide Nanoparticles on CdSe@CdS Nanorods
05:41

Photochemical Oxidative Growth of Iridium Oxide Nanoparticles on CdSe@CdS Nanorods

Published on: February 11, 2016

9.5K
[DPEPhosbcpCu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst
09:12

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

Published on: May 21, 2019

9.1K
Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts
05:47

Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts

Published on: August 7, 2018

7.6K

科学领域:

  • 超分子化学 超分子化学
  • 材料科学 材料科学 材料科学
  • 协调化学 协调化学

背景情况:

  • 由非共价相互作用驱动的自我组装对于创建复杂的功能架构至关重要.
  • 非共价合成化学为构建这些结构提供了一种受控的,逐步的方法.

研究的目的:

  • 为了研究(II) 复杂自组合与氧化还原反应的合.
  • 通过受控的氧化和还原循环探索发光材料的形成.

主要方法:

  • 使用氧化还原反应,在非发射性 (IV) 单体和发光 (II) 凝之间切换.
  • 采用紫外线辐射来诱导减少并启动超分子纤维的形成.
  • 使用光显微镜实时观察自组装过程.

主要成果:

  • 将Pt (II) 氧化为Pt (IV) 产生无排放的单体.
  • 将Pt(IV) 减少为Pt(II) 触发了具有不同的动力和热力学路径的发光凝的形成.
  • 紫外线诱导的减少产生具有Pt∙∙∙Pt相互作用的超分子纤维,增强光物理性质.
  • 可见光的吸收延伸到550nm.
  • 观察到光选择性生长,现有的纤维促进了进一步的组装.

结论:

  • 这项研究展示了复合体的新型氧化还原开关自组装策略.
  • 开发的方法允许对发光超分子材料的受控形成.
  • 这些发现为设计具有可调节光物理性质的先进功能材料开辟了道路.