共查询到18条相似文献,搜索用时 31 毫秒
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本文对几种人工光合作用反应中心系统,做一个简单的综述,其中包括叶绿素和细菌叶绿素二聚体,卟啉二聚体,卟啉-苯醌共价键络合物以及其他合成中心。 相似文献
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基于无机材料-微生物复合半人工光合系统是在自然光合作用和人工光合作用研究进展到一定阶段,为克服各自的缺陷,实现微生物与无机材料优势互补而发展出来的一种研究体系。该体系的主要优势是将微生物的催化选择性与无机材料的光响应性结合起来,旨在解决人工光合作用体系催化选择性差的问题。目前,可以通过光催化剂-微生物复合和电极-微生物复合来实现基于无机材料-微生物复合的半人工光合作用。本文围绕基于无机材料-微生物复合的半人工光合作用,依次从半人工水氧化、半人工光合还原和材料-微生物界面等方面做了系统的阐述,重点介绍基于电极-微生物复合的半人工光合体系研究进展,对基于无机材料-微生物复合的半人工光合作用的领域现状做了分析和总结,并且对该领域的前景进行了展望。 相似文献
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人工光合作用反应中的研究进展 总被引:1,自引:0,他引:1
本文对几种人工光合作用反应中心系统,做一个简单的综述,其中包括叶绿素和细菌叶绿素二聚体,卟啉二聚体;卟啉-苯醌共价键络合物以及其他合成中心. 相似文献
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The development of green and renewable energy sources is in high demand due to energy shortage and productivity development. Artificial photosynthesis(AP) is one of the most effective ways to address the energy shortage and the greenhouse effect by converting solar energy into hydrogen and other carbon-based high value-added products through the understanding of the mechanism, structural analysis, and functional simulation of natural photosynthesis. In this review, the development of AP from natural catalysts to artificial catalysts is described, and the processes of oxygen production, hydrogen production, and carbon fixation are sorted out to understand the properties and correlations of the core functional components in natural photosynthesis, to provide a better rational design and optimization for further development of advanced heterogeneous materials. 相似文献
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Jannik Brückmann Dr. Carolin Müller Tamar Maisuradze Dr. Alexander K. Mengele Dr. Djawed Nauroozi Sven Fauth Andreas Gruber Prof. Dr. Stefanie Gräfe Prof. Dr. Kerstin Leopold Dr. Stephan Kupfer Prof. Dr. Benjamin Dietzek-Ivanšić Prof. Dr. Sven Rau 《Chemistry (Weinheim an der Bergstrasse, Germany)》2022,28(51):e202200766
The synthesis and detailed characterization of a new Ru polypyridine complex containing a heteroditopic bridging ligand with previously unexplored metal-metal distances is presented. Due to the twisted geometry of the novel ligand, the resultant division of the ligand in two distinct subunits leads to steady state as well as excited state properties of the corresponding mononuclear Ru(II) polypyridine complex resembling those of prototype [Ru(bpy)3]2+ (bpy=2,2'-bipyridine). The localization of the initially optically excited and the nature of the long-lived excited states on the Ru-facing ligand spheres is evaluated by resonance Raman and fs-TA spectroscopy, respectively, and supported by DFT and TDDFT calculations. Coordination of a second metal (Zn or Rh) to the available bis-pyrimidyl-like coordination sphere strongly influences the frontier orbitals, apparent by, for example, luminescence quenching. Thus, the new bridging ligand motif offers electronic properties, which can be adjusted by the nature of the second metal center. Using the heterodinuclear Ru−Rh complex, visible light-driven reduction of NAD+ to NADH was achieved, highlighting the potential of this system for photocatalytic applications. 相似文献
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Dr. Joon Seok Lee Dong Heon Nam Su Keun Kuk Prof. Dr. Chan Beum Park 《Chemistry (Weinheim an der Bergstrasse, Germany)》2014,20(13):3584-3588
Artificial photosynthesis in nanobiocatalytic assemblies aims to reconstruct man‐made photosensitizers, electron mediators, electron donors, and redox enzymes for solar synthesis of valuable chemicals through photochemical cofactor regeneration. Herein, we report, for the first time, on nanobiocatalytic artificial photosynthesis in near‐infrared (NIR) light, which constitutes over 46% of the solar energy. For NIR‐light‐driven photoenzymatic synthesis, we synthesized silica‐coated upconversion nanoparticles, Si‐NaYF4:Yb,Er and Si‐NaYF4:Yb,Tm, for efficient photon‐conversion through Förster resonance energy transfer (FRET) with rose bengal (RB), a photosensitizer. We observed NIR‐induced electron transfer by using linear sweep voltammetric analysis; this indicates that photoexcited electrons of RB/Si‐NaYF4:Yb,Er are transferred to NAD+ through a Rh‐based electron mediator. RB/Si‐NaYF4:Yb,Er nanoparticles, which exhibit higher FRET efficiency due to more spectral overlap than RB/Si‐NaYF4:Yb,Tm, perform much better in the photoenzymatic conversion. 相似文献
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Mi Zhang Meng Lu Zhong‐Ling Lang Jiang Liu Ming Liu Jia‐Nan Chang Le‐Yan Li Lin‐Jie Shang Min Wang Shun‐Li Li Ya‐Qian Lan 《Angewandte Chemie (International ed. in English)》2020,59(16):6500-6506
A strategy to covalently connect crystalline covalent organic frameworks (COFs) with semiconductors to create stable organic–inorganic Z‐scheme heterojunctions for artificial photosynthesis is presented. A series of COF–semiconductor Z‐scheme photocatalysts combining water‐oxidation semiconductors (TiO2, Bi2WO6, and α‐Fe2O3) with CO2 reduction COFs (COF‐316/318) was synthesized and exhibited high photocatalytic CO2‐to‐CO conversion efficiencies (up to 69.67 μmol g?1 h?1), with H2O as the electron donor in the gas–solid CO2 reduction, without additional photosensitizers and sacrificial agents. This is the first report of covalently bonded COF/inorganic‐semiconductor systems utilizing the Z‐scheme applied for artificial photosynthesis. Experiments and calculations confirmed efficient semiconductor‐to‐COF electron transfer by covalent coupling, resulting in electron accumulation in the cyano/pyridine moieties of the COF for CO2 reduction and holes in the semiconductor for H2O oxidation, thus mimicking natural photosynthesis. 相似文献
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Dr. Xu-Zhe Wang Shu-Lin Meng Dr. Hongyan Xiao Dr. Ke Feng Yang Wang Dr. Jing-Xin Jian Dr. Xu-Bing Li Prof. Dr. Chen-Ho Tung Prof. Dr. Li-Zhu Wu 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2020,132(42):18558-18562
Inspired by the natural [NiFe]-H2ase, we designed mimic 1 , (dppe)Ni(μ-pdt)(μ-Cl)Ru(CO)2Cl to realize effective H2 evolution under photocatalytic conditions. However, a new species 2 was captured in the course of photo-, electro-, and chemo- one-electron reduction. Experimental studies of in situ IR spectroscopy, EPR, NMR, X-ray absorption spectroscopy, and DFT calculations corroborated a dimeric structure of 2 as a closed-shell, symmetric structure with a RuI center. The isolated dimer 2 showed the real catalytic role in photocatalysis with a benchmark turnover frequency (TOF) of 1936 h−1 for H2 evolution, while mimic 1 worked as a pre-catalyst and evolved H2 only after being reduced to 2 . The remarkably catalytic activity and unique dimer structure of 2 operated in photocatalysis unveiled a broad research prospect in hydrogenases mimics for advanced H2 evolution. 相似文献
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Sahng Ha Lee Jae Hong Kim Prof. Chan Beum Park 《Chemistry (Weinheim an der Bergstrasse, Germany)》2013,19(14):4392-4406
In green plants, solar‐energy utilization is accomplished through a cascade of photoinduced electron transfer, which remains a target model for realizing artificial photosynthesis. We introduce the concept of biocatalyzed artificial photosynthesis through coupling redox biocatalysis with photocatalysis to mimic natural photosynthesis based on visible‐light‐driven regeneration of enzyme cofactors. Key design principles for reaction components, such as electron donors, photosensitizers, and electron mediators, are described for artificial photosynthesis involving biocatalytic assemblies. Recent research outcomes that serve as a proof of the concept are summarized and current issues are discussed to provide a future perspective. 相似文献