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Zhao LJ, Zhang C, Zhang S, Lv X, Chen J, Sun X, Su H, Murayama T, Qi C. High Selectivity Cofactor NADH Regeneration Organic Iridium Complexes Used for High-Efficiency Chem-Enzyme Cascade Catalytic Hydrogen Transfer. Inorg Chem 2023; 62:17577-17582. [PMID: 37843583 DOI: 10.1021/acs.inorgchem.3c02882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2023]
Abstract
Our research demonstrated that novel pentamethylcyclopentadienyl (Cp*) iridium pyridine sulfonamide complex PySO2NPh-Ir (7) could highly specifically catalyze nicotinamide adenine dinucleotide (NAD+) into the corresponding reducing cofactor NADH in cell growth media containing various biomolecules. The structures and catalytic mechanism of 7 were studied by single-crystal X-ray, NMR, electrochemical, and kinetic methods, and the formation of iridium hydride species Ir-H was confirmed to be the plausible hydride-transfer intermediate of 7. Moreover, benefiting from its high hydrogen-transfer activity and selectivity for NADH regeneration, 7 was used as an optimal metal catalyst to establish a chem-enzyme cascade catalytic hydrogen-transfer system, which realized the high-efficiency preparation of l-glutamic acid by combining with l-glutamate dehydrogenase (GLDH).
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Affiliation(s)
- Li-Jun Zhao
- Yantai Key Laboratory of Gold Catalysis and Engineering, Shandong Applied Research Center of Gold Nanotechnology, School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China
| | - Caimei Zhang
- Yantai Key Laboratory of Gold Catalysis and Engineering, Shandong Applied Research Center of Gold Nanotechnology, School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China
| | - Shixin Zhang
- Yantai Key Laboratory of Gold Catalysis and Engineering, Shandong Applied Research Center of Gold Nanotechnology, School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China
| | - Xiaoyi Lv
- Yantai Key Laboratory of Gold Catalysis and Engineering, Shandong Applied Research Center of Gold Nanotechnology, School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China
| | - Jiayang Chen
- Yantai Key Laboratory of Gold Catalysis and Engineering, Shandong Applied Research Center of Gold Nanotechnology, School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China
| | - Xun Sun
- Yantai Key Laboratory of Gold Catalysis and Engineering, Shandong Applied Research Center of Gold Nanotechnology, School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China
| | - Huijuan Su
- Yantai Key Laboratory of Gold Catalysis and Engineering, Shandong Applied Research Center of Gold Nanotechnology, School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China
| | - Toru Murayama
- Yantai Key Laboratory of Gold Catalysis and Engineering, Shandong Applied Research Center of Gold Nanotechnology, School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China
- Research Center for Hydrogen Energy-Based Society, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, Japan
| | - Caixia Qi
- Yantai Key Laboratory of Gold Catalysis and Engineering, Shandong Applied Research Center of Gold Nanotechnology, School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China
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2
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Henke W, Peng Y, Meier A, Fujita E, Grills D, Polyansky D, Blakemore J. Mechanistic roles of metal- and ligand-protonated species in hydrogen evolution with [Cp*Rh] complexes. Proc Natl Acad Sci U S A 2023; 120:e2217189120. [PMID: 37186841 PMCID: PMC10214172 DOI: 10.1073/pnas.2217189120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Accepted: 02/17/2023] [Indexed: 05/17/2023] Open
Abstract
Protonation reactions involving organometallic complexes are ubiquitous in redox chemistry and often result in the generation of reactive metal hydrides. However, some organometallic species supported by η5-pentamethylcyclopentadienyl (Cp*) ligands have recently been shown to undergo ligand-centered protonation by direct proton transfer from acids or tautomerization of metal hydrides, resulting in the generation of complexes bearing the uncommon η4-pentamethylcyclopentadiene (Cp*H) ligand. Here, time-resolved pulse radiolysis (PR) and stopped-flow spectroscopic studies have been applied to examine the kinetics and atomistic details involved in the elementary electron- and proton-transfer steps leading to complexes ligated by Cp*H, using Cp*Rh(bpy) as a molecular model (where bpy is 2,2'-bipyridyl). Stopped-flow measurements coupled with infrared and UV-visible detection reveal that the sole product of initial protonation of Cp*Rh(bpy) is [Cp*Rh(H)(bpy)]+, an elusive hydride complex that has been spectroscopically and kinetically characterized here. Tautomerization of the hydride leads to the clean formation of [(Cp*H)Rh(bpy)]+. Variable-temperature and isotopic labeling experiments further confirm this assignment, providing experimental activation parameters and mechanistic insight into metal-mediated hydride-to-proton tautomerism. Spectroscopic monitoring of the second proton transfer event reveals that both the hydride and related Cp*H complex can be involved in further reactivity, showing that [(Cp*H)Rh] is not necessarily an off-cycle intermediate, but, instead, depending on the strength of the acid used to drive catalysis, an active participant in hydrogen evolution. Identification of the mechanistic roles of the protonated intermediates in the catalysis studied here could inform design of optimized catalytic systems supported by noninnocent cyclopentadienyl-type ligands.
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Affiliation(s)
- Wade C. Henke
- Department of Chemistry, University of Kansas, Lawrence, KS66045
| | - Yun Peng
- Department of Chemistry, University of Kansas, Lawrence, KS66045
| | - Alex A. Meier
- Department of Chemistry, University of Kansas, Lawrence, KS66045
| | - Etsuko Fujita
- Chemistry Division, Brookhaven National Laboratory, Upton, NY11973-5000
| | - David C. Grills
- Chemistry Division, Brookhaven National Laboratory, Upton, NY11973-5000
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3
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Schreier MR, Pfund B, Steffen DM, Wenger OS. Photocatalytic Regeneration of a Nicotinamide Adenine Nucleotide Mimic with Water-Soluble Iridium(III) Complexes. Inorg Chem 2023; 62:7636-7643. [PMID: 36731131 DOI: 10.1021/acs.inorgchem.2c03100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Nicotinamide adenine nucleotide (NADH) is involved in many biologically relevant redox reactions, and the photochemical regeneration of its oxidized form (NAD+) under physiological conditions is of interest for combined photo- and biocatalysis. Here, we demonstrate that tri-anionic, water-soluble variants of typically very lipophilic iridium(III) complexes can photo-catalyze the reduction of an NAD+ mimic in a comparatively efficient manner. In combination with a well-known rhodium co-catalyst to facilitate regioselective reactions, these iridium(III) photo-reductants outcompete the commonly used [Ru(bpy)3]2+ (bpy = 2,2'-bipyridine) photosensitizer in water by up to 1 order of magnitude in turnover frequency. This improved reactivity is attributable to the strong excited-state electron donor properties and the good chemical robustness of the tri-anionic iridium(III) sensitizers, combined with their favorable Coulombic interaction with the di-cationic rhodium co-catalyst. Our findings seem relevant in the greater context of photobiocatalysis, for which access to strong, efficient, and robust photoreductants with good water solubility can be essential.
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Affiliation(s)
- Mirjam R Schreier
- Department of Chemistry, University of Basel, Street Johanns-Ring 19, 4056 Basel, Switzerland.,National Competence Center in Research, Molecular Systems Engineering, 4002 Basel, Switzerland
| | - Björn Pfund
- Department of Chemistry, University of Basel, Street Johanns-Ring 19, 4056 Basel, Switzerland
| | - Debora M Steffen
- Department of Chemistry, University of Basel, Street Johanns-Ring 19, 4056 Basel, Switzerland
| | - Oliver S Wenger
- Department of Chemistry, University of Basel, Street Johanns-Ring 19, 4056 Basel, Switzerland.,National Competence Center in Research, Molecular Systems Engineering, 4002 Basel, Switzerland
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4
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Ong J, Loke JWL, Koh HL, Fan WY. Proflavine-catalysed trifluoromethylation of α,β-unsaturated carbonyls. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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5
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Wang Z, Hu Y, Zhang S, Sun Y. Artificial photosynthesis systems for solar energy conversion and storage: platforms and their realities. Chem Soc Rev 2022; 51:6704-6737. [PMID: 35815740 DOI: 10.1039/d1cs01008e] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
In natural photosynthesis, photosynthetic organisms such as green plants realize efficient solar energy conversion and storage by integrating photosynthetic components on the thylakoid membrane of chloroplasts. Inspired by natural photosynthesis, researchers have developed many artificial photosynthesis systems (APS's) that integrate various photocatalysts and biocatalysts to convert and store solar energy in the fields of resource, environment, food, and energy. To improve the system efficiency and reduce the operation cost, reaction platforms are introduced in APS's since they allow for great stability and continuous processing. A systematic understanding of how a reaction platform affects the performance of artificial photosynthesis is conducive for designing an APS with superb solar energy utilization. In this review, we discuss the recent APS's researches, especially those confined on/in platforms. The importance of different platforms and their influences on APS's performance are emphasized. Generally, confined platforms can enhance the stability and repeatability of both photocatalysts and biocatalysts in APS's as well as improve the photosynthetic performance due to the proximity effect. For functional platforms that can participate in the artificial photosynthesis reactions as active parts, a high integration of APS's components on/in these platforms can lead to efficient electron transfer, enhanced light-harvesting, or synergistic catalysis, resulting in superior photosynthesis performance. Therefore, the integration of APS's components is beneficial for the transfer of substrates and photoexcited electrons in artificial photosynthesis. We finally summarize the current challenges of APS's development and further efforts on the improvement of APS's.
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Affiliation(s)
- Zhenfu Wang
- Department of Biochemical Engineering, School of Chemical Engineering and Technology and Key Laboratory of Systems Bioengineering and Frontiers Science Center for Synthetic Biology (Ministry of Education), Tianjin University, Tianjin 300350, China.
| | - Yang Hu
- Department of Biochemical Engineering, School of Chemical Engineering and Technology and Key Laboratory of Systems Bioengineering and Frontiers Science Center for Synthetic Biology (Ministry of Education), Tianjin University, Tianjin 300350, China.
| | - Songping Zhang
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China
| | - Yan Sun
- Department of Biochemical Engineering, School of Chemical Engineering and Technology and Key Laboratory of Systems Bioengineering and Frontiers Science Center for Synthetic Biology (Ministry of Education), Tianjin University, Tianjin 300350, China.
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6
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Xing X, Liu Y, Shi ML, Li K, Fan XY, Wu ZL, Wang N, Yu XQ. Preparation of chiral aryl alcohols: a controllable enzymatic strategy via light-driven NAD(P)H regeneration. NEW J CHEM 2022. [DOI: 10.1039/d1nj06000g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Controllable and mild photoenzymatic production of chiral alcohols was realized by coupling a photochemical NAD(P)H regeneration system with (R)- or (S)-selective ketoreductases.
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Affiliation(s)
- Xiu Xing
- Key Laboratory of Green Chemistry Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Yan Liu
- CAS Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, P. R. China
| | - Ming-Liang Shi
- Key Laboratory of Green Chemistry Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Kun Li
- Key Laboratory of Green Chemistry Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Xin-Yue Fan
- Key Laboratory of Green Chemistry Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Zhong-Liu Wu
- CAS Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, P. R. China
| | - Na Wang
- Key Laboratory of Green Chemistry Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Xiao-Qi Yu
- Key Laboratory of Green Chemistry Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
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7
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Comadoll CG, Henke WC, Hopkins Leseberg JA, Douglas JT, Oliver AG, Day VW, Blakemore JD. Examining the Modular Synthesis of [Cp*Rh] Monohydrides Supported by Chelating Diphosphine Ligands. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00525] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chelsea G. Comadoll
- Department of Chemistry, University of Kansas, 1567 Irving Hill Road, Lawrence, Kansas 66045, United States
| | - Wade C. Henke
- Department of Chemistry, University of Kansas, 1567 Irving Hill Road, Lawrence, Kansas 66045, United States
| | - Julie A. Hopkins Leseberg
- Department of Chemistry, University of Kansas, 1567 Irving Hill Road, Lawrence, Kansas 66045, United States
| | - Justin T. Douglas
- Nuclear Magnetic Resonance Laboratory, Molecular Structures Group, University of Kansas, 2034 Becker Drive, Lawrence, Kansas 66047, United States
| | - Allen G. Oliver
- Department of Chemistry and Biochemistry, University of Notre Dame, 149 Stepan Chemistry, Notre Dame, Indiana 46556, United States
| | - Victor W. Day
- Department of Chemistry, University of Kansas, 1567 Irving Hill Road, Lawrence, Kansas 66045, United States
| | - James D. Blakemore
- Department of Chemistry, University of Kansas, 1567 Irving Hill Road, Lawrence, Kansas 66045, United States
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8
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Lee YS, Gerulskis R, Minteer SD. Advances in electrochemical cofactor regeneration: enzymatic and non-enzymatic approaches. Curr Opin Biotechnol 2021; 73:14-21. [PMID: 34246871 DOI: 10.1016/j.copbio.2021.06.013] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Revised: 06/12/2021] [Accepted: 06/13/2021] [Indexed: 11/28/2022]
Abstract
Nicotinamide adenine dinucleotide(NAD(P)H) is a metabolically interconnected redox cofactor serving as a hydride source for the majority of oxidoreductases, and consequently constituting a significant cost factor for bioprocessing. Much research has been devoted to the development of efficient, affordable, and sustainable methods for the regeneration of these cofactors through chemical, electrochemical, and photochemical approaches. However, the enzymatic approach using formate dehydrogenase is still the most abundantly employed in industrial applications, even though it suffers from system complexity and product purity issues. In this review, we summarize non-enzymatic and enzymatic electrochemical approaches for cofactor regeneration, then discuss recent developments to solve major issues. Issues discussed include Rh-catalyst mediated enzyme mutual inactivation, electron-transfer rates, catalyst sustainability, product selectivity and simplifying product purification. Recently reported remedies are discussed, such as heterogeneous metal catalysts generating H+ as the sole byproduct or high activity and stability redox-polymer immobilized enzymatic systems for sustainable organic synthesis.
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Affiliation(s)
- Yoo Seok Lee
- Department of Chemistry, University of Utah, 315 S 1400 E, Salt Lake City, UT 84112, USA.
| | - Rokas Gerulskis
- Department of Chemistry, University of Utah, 315 S 1400 E, Salt Lake City, UT 84112, USA
| | - Shelley D Minteer
- Department of Chemistry, University of Utah, 315 S 1400 E, Salt Lake City, UT 84112, USA.
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9
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Özgen FF, Runda ME, Schmidt S. Photo-biocatalytic Cascades: Combining Chemical and Enzymatic Transformations Fueled by Light. Chembiochem 2021; 22:790-806. [PMID: 32961020 PMCID: PMC7983893 DOI: 10.1002/cbic.202000587] [Citation(s) in RCA: 46] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 09/22/2020] [Indexed: 12/13/2022]
Abstract
In the field of green chemistry, light - an attractive natural agent - has received particular attention for driving biocatalytic reactions. Moreover, the implementation of light to drive (chemo)enzymatic cascade reactions opens up a golden window of opportunities. However, there are limitations to many current examples, mostly associated with incompatibility between the enzyme and the photocatalyst. Additionally, the formation of reactive radicals upon illumination and the loss of catalytic activities in the presence of required additives are common observations. As outlined in this review, the main question is how to overcome current challenges to the exploitation of light to drive (chemo)enzymatic transformations. First, we highlight general concepts in photo-biocatalysis, then give various examples of photo-chemoenzymatic (PCE) cascades, further summarize current synthetic examples of PCE cascades and discuss strategies to address the limitations.
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Affiliation(s)
- Fatma Feyza Özgen
- Groningen Research Institute of PharmacyDepartment of Chemical and Pharmaceutical BiologyAntonius Deusinglaan 19713 AVGroningen (TheNetherlands
| | - Michael E. Runda
- Groningen Research Institute of PharmacyDepartment of Chemical and Pharmaceutical BiologyAntonius Deusinglaan 19713 AVGroningen (TheNetherlands
| | - Sandy Schmidt
- Groningen Research Institute of PharmacyDepartment of Chemical and Pharmaceutical BiologyAntonius Deusinglaan 19713 AVGroningen (TheNetherlands
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10
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Tian Y, Zhou Y, Zong Y, Li J, Yang N, Zhang M, Guo Z, Song H. Construction of Functionally Compartmental Inorganic Photocatalyst-Enzyme System via Imitating Chloroplast for Efficient Photoreduction of CO 2 to Formic Acid. ACS APPLIED MATERIALS & INTERFACES 2020; 12:34795-34805. [PMID: 32805792 DOI: 10.1021/acsami.0c06684] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Inorganic photocatalyst-enzyme systems are a prominent platform for the photoreduction of CO2 to value-added chemicals and fuels. However, poor electron transfer kinetics and enzyme deactivation by reactive oxygen species in the photoexcitation process severely limit catalytic efficiency. In chloroplast, enzymatic CO2 reduction and photoexcitation are compartmentalized by the thylakoid membrane, which protects enzymes from photodamage, while the tightly integrated photosystem facilitates electron transfer, promoting photocatalysis. By mimicking this strategy, we constructed a novel functionally compartmental inorganic photocatalyst-enzyme system for CO2 reduction to formate. To accomplish efficient electron transfer, we first synthesized an integrated artificial photosystem by conjugation of the cocatalyst (a Rh complex) onto thiophene-modified C3N4 (TPE-C3N4), demonstrating an NADH regeneration rate of 9.33 μM·min-1, 2.33 times higher than that of a homogeneous counterpart. The enhanced NADH regeneration activity was caused by the tightly conjugated structure of the artificial photosystem, enabling rapid electron transfer from TPE-C3N4 to the Rh complex. To protect formate dehydrogenase (FDH) from photoinduced deactivation, FDH was encapsulated into MAF-7, a metal-organic framework (MOF) material, to compartmentalize FDH from the toxic photoexcitation process, similar to the function of the thylakoid membrane. Moreover, the triazole linkers of MAF-7 possess both hydrophilicity and pH-buffering capacity providing a stable microenvironment for FDH, which could enhance enzyme stability in photosynthesis. The synergy between the enhanced electron transfer of TPE-C3N4 for NADH cofactor regeneration and MOF-protection of the redox enzyme enables the construction of a functionally compartmental inorganic photocatalyst-enzyme association system, promoting CO2 photoconversion to formic acid with a yield of 16.75 mM after 9 h of illumination, 3.24 times greater than that of the homogeneous reaction counterpart.
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Affiliation(s)
- Yao Tian
- Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Yinuo Zhou
- Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Yongchao Zong
- Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Jiansheng Li
- Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Nan Yang
- Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Mai Zhang
- Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Zhiqi Guo
- Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Hao Song
- Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), Tianjin University, Tianjin 300072, China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
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11
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Desage‐El Murr M. Nature is the Cure: Engineering Natural Redox Cofactors for Biomimetic and Bioinspired Catalysis. ChemCatChem 2019. [DOI: 10.1002/cctc.201901642] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Marine Desage‐El Murr
- Institut de Chimie UMR 7177Université de Strasbourg 1 rue Blaise Pascal Strasbourg 67000 France
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12
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Lee SH, Choi DS, Kuk SK, Park CB. Photobiokatalyse: Aktivierung von Redoxenzymen durch direkten oder indirekten Transfer photoinduzierter Elektronen. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201710070] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Sahng Ha Lee
- Department of Materials Science and EngineeringKorea Advanced Institute of Science and Technology (KAIST) 335 Science Road Daejeon 305-701 Republik Korea
| | - Da Som Choi
- Department of Materials Science and EngineeringKorea Advanced Institute of Science and Technology (KAIST) 335 Science Road Daejeon 305-701 Republik Korea
| | - Su Keun Kuk
- Department of Materials Science and EngineeringKorea Advanced Institute of Science and Technology (KAIST) 335 Science Road Daejeon 305-701 Republik Korea
| | - Chan Beum Park
- Department of Materials Science and EngineeringKorea Advanced Institute of Science and Technology (KAIST) 335 Science Road Daejeon 305-701 Republik Korea
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13
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Lee SH, Choi DS, Kuk SK, Park CB. Photobiocatalysis: Activating Redox Enzymes by Direct or Indirect Transfer of Photoinduced Electrons. Angew Chem Int Ed Engl 2018; 57:7958-7985. [PMID: 29194901 DOI: 10.1002/anie.201710070] [Citation(s) in RCA: 190] [Impact Index Per Article: 31.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 11/21/2017] [Indexed: 01/01/2023]
Abstract
Biocatalytic transformation has received increasing attention in the green synthesis of chemicals because of the diversity of enzymes, their high catalytic activities and specificities, and mild reaction conditions. The idea of solar energy utilization in chemical synthesis through the combination of photocatalysis and biocatalysis provides an opportunity to make the "green" process greener. Oxidoreductases catalyze redox transformation of substrates by exchanging electrons at the enzyme's active site, often with the aid of electron mediator(s) as a counterpart. Recent progress indicates that photoinduced electron transfer using organic (or inorganic) photosensitizers can activate a wide spectrum of redox enzymes to catalyze fuel-forming reactions (e.g., H2 evolution, CO2 reduction) and synthetically useful reductions (e.g., asymmetric reduction, oxygenation, hydroxylation, epoxidation, Baeyer-Villiger oxidation). This Review provides an overview of recent advances in light-driven activation of redox enzymes through direct or indirect transfer of photoinduced electrons.
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Affiliation(s)
- Sahng Ha Lee
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 335 Science Road, Daejeon, 305-701, Republic of Korea
| | - Da Som Choi
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 335 Science Road, Daejeon, 305-701, Republic of Korea
| | - Su Keun Kuk
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 335 Science Road, Daejeon, 305-701, Republic of Korea
| | - Chan Beum Park
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 335 Science Road, Daejeon, 305-701, Republic of Korea
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14
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Fukuzumi S, Lee Y, Nam W. Artificial Photosynthesis for Production of ATP, NAD(P)H, and Hydrogen Peroxide. CHEMPHOTOCHEM 2017. [DOI: 10.1002/cptc.201700146] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Shunichi Fukuzumi
- Department of Chemistry and Nano Science Ewha Womans University Seoul 03760 Korea
- Graduate School of Science and Engineering Meijo University, Nagoya Aichi 468-8502 Japan
| | - Yong‐Min Lee
- Department of Chemistry and Nano Science Ewha Womans University Seoul 03760 Korea
| | - Wonwoo Nam
- Department of Chemistry and Nano Science Ewha Womans University Seoul 03760 Korea
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15
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Ni Y, Hollmann F. Artificial Photosynthesis: Hybrid Systems. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2017; 158:137-158. [PMID: 26987806 DOI: 10.1007/10_2015_5010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Oxidoreductases are promising catalysts for organic synthesis. To sustain their catalytic cycles they require efficient supply with redox equivalents. Today classical biomimetic approaches utilizing natural electron supply chains prevail but artificial regeneration approaches bear the promise of simpler and more robust reaction schemes. Utilizing visible light can accelerate such artificial electron transport chains and even enable thermodynamically unfeasible reactions such as the use of water as reductant.This contribution critically summarizes the current state of the art in photoredoxbiocatalysis (i.e. light-driven biocatalytic oxidation and reduction reactions).
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Affiliation(s)
- Yan Ni
- Delft University of Technology, Delft, The Netherlands
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16
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Nowak C, Pick A, Csepei LI, Sieber V. Characterization of Biomimetic Cofactors According to Stability, Redox Potentials, and Enzymatic Conversion by NADH Oxidase from Lactobacillus pentosus. Chembiochem 2017; 18:1944-1949. [PMID: 28752634 DOI: 10.1002/cbic.201700258] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2017] [Indexed: 11/10/2022]
Abstract
Oxidoreductases are attractive biocatalysts that convert achiral substrates into products of higher value, but they are also for the most part dependent on nicotinamide cofactors. Recently, biomimetic nicotinamide derivatives have received attention as less costly alternatives to natural cofactors. However, recycling of biomimetics is still challenging because there are only limited opportunities. Here, we have characterized various biomimetic cofactors with regard to stability and redox potentials to find the best alternative to natural cofactors. Further, the cofactor spectrum of NADH oxidase from Lactobacillus pentosus (LpNox) could be expanded, and the enzymatic activity was also compared to activities with different small-molecule catalysts. As a result, we succeeded in identifying several strategies for regeneration of oxidized biomimetics.
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Affiliation(s)
- Claudia Nowak
- Technical University of Munich, Department of Life Science Engineering, Straubing Center of Science, Schulgasse 16, 94315, Straubing, Germany
| | - André Pick
- Technical University of Munich, Department of Life Science Engineering, Straubing Center of Science, Schulgasse 16, 94315, Straubing, Germany
| | - Lénárd-István Csepei
- Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB, Bio, Electro and Chemocatalysis BioCat, Straubing Branch, Schulgasse 11a, 94315, Straubing, Germany
| | - Volker Sieber
- Technical University of Munich, Department of Life Science Engineering, Straubing Center of Science, Schulgasse 16, 94315, Straubing, Germany.,Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB, Bio, Electro and Chemocatalysis BioCat, Straubing Branch, Schulgasse 11a, 94315, Straubing, Germany.,Technical University of Munich, Catalysis Research Center, Ernst-Otto-Fischer-Strasse 1, 85748, Garching, Germany.,The University of Queensland, School of Chemistry and Molecular Biosciences, 68 Cooper Road, St. Lucia, 4072, Australia
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17
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Product Selectivity in Homogeneous Artificial Photosynthesis Using [(bpy)Rh(Cp*)X]n+-Based Catalysts. INORGANICS 2017. [DOI: 10.3390/inorganics5020035] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Due to the limited amount of fossil energy carriers, the storage of solar energy in chemical bonds using artificial photosynthesis has been under intensive investigation within the last decades. As the understanding of the underlying working principle of these complex systems continuously grows, more focus will be placed on a catalyst design for highly selective product formation. Recent reports have shown that multifunctional photocatalysts can operate with high chemoselectivity, forming different catalysis products under appropriate reaction conditions. Within this context [(bpy)Rh(Cp*)X]n+-based catalysts are highly relevant examples for a detailed understanding of product selectivity in artificial photosynthesis since the identification of a number of possible reaction intermediates has already been achieved.
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19
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20
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Affiliation(s)
- Nathan A. Romero
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - David A. Nicewicz
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
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21
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Peers MK, Toogood HS, Heyes DJ, Mansell D, Coe BJ, Scrutton NS. Light-driven biocatalytic reduction of α,β-unsaturated compounds by ene reductases employing transition metal complexes as photosensitizers. Catal Sci Technol 2016; 6:169-177. [PMID: 27019691 PMCID: PMC4786955 DOI: 10.1039/c5cy01642h] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2015] [Accepted: 10/16/2015] [Indexed: 11/25/2022]
Abstract
Efficient and cost effective nicotinamide cofactor regeneration is essential for industrial-scale bio-hydrogenations employing flavin-containing biocatalysts such as the Old Yellow Enzymes. A direct flavin regeneration system using visible light to initiate a photoredox cycle and drive biocatalysis is described, and shown to be effective in driving biocatalytic activated alkene reduction. Using Ru(ii) or Ir(iii) complexes as photosensitizers, coupled with an electron transfer mediator (methyl viologen) and sacrificial electron donor (triethanolamine) drives catalytic turnover of two Old Yellow Enzymes with multiple oxidative substrates. Therefore, there is great potential in the development of light-driven biocatalytic systems, providing an alternative to the reliance on enzyme-based cofactor regeneration systems.
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Affiliation(s)
- Martyn K Peers
- Manchester Institute of Biotechnology , Faculty of Life Sciences , University of Manchester , 131 Princess Street , Manchester , M1 7DN , UK .
| | - Helen S Toogood
- Manchester Institute of Biotechnology , Faculty of Life Sciences , University of Manchester , 131 Princess Street , Manchester , M1 7DN , UK .
| | - Derren J Heyes
- Manchester Institute of Biotechnology , Faculty of Life Sciences , University of Manchester , 131 Princess Street , Manchester , M1 7DN , UK .
| | - David Mansell
- Manchester Institute of Biotechnology , Faculty of Life Sciences , University of Manchester , 131 Princess Street , Manchester , M1 7DN , UK .
| | - Benjamin J Coe
- School of Chemistry , University of Manchester , Oxford Road , Manchester , M13 9PL , UK
| | - Nigel S Scrutton
- Manchester Institute of Biotechnology , Faculty of Life Sciences , University of Manchester , 131 Princess Street , Manchester , M1 7DN , UK .
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22
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Maciá-Agulló JA, Corma A, Garcia H. Photobiocatalysis: The Power of Combining Photocatalysis and Enzymes. Chemistry 2015; 21:10940-59. [DOI: 10.1002/chem.201406437] [Citation(s) in RCA: 102] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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23
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Ghosh T, Slanina T, König B. Visible light photocatalytic reduction of aldehydes by Rh(iii)-H: a detailed mechanistic study. Chem Sci 2015; 6:2027-2034. [PMID: 29142671 PMCID: PMC5654342 DOI: 10.1039/c4sc03709j] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2014] [Accepted: 01/06/2015] [Indexed: 12/03/2022] Open
Abstract
The slow visible light mediated generation of a rhodium hydride allows the chemoselective reduction of aldehydes in the presence of ketones. Electron transfer from the chromophore to the metal complex proceeds via a radical anion intermediate or a solvated electron as two competing reaction pathways.
The chemoselective photoreduction of aldehydes in the presence of ketones was achieved using triethanolamine (TEOA) as sacrificial electron donor, proflavine (PF) as photocatalyst and [Cp*Rh(iii)(bpy)Cl]Cl (Rhcat) as mediator. The reducing agent, which reacts with the carbonyl group was found to be [Cp*Rh(iii)(bpy)H]Cl (Rh(iii)–H). Contrary to formate-based reduction, its slow photochemical in situ generation enables to kinetically distinguish aldehydes from ketones. The inherent reactivity difference of the carbonyl compounds is transferred by the method into synthetically useful reaction selectivities. The substrate scope is broad with excellent yields. A detailed study of the reaction mechanism reveals that the photoreduction of the PF triplet and the subsequent reduction of the Rhcat leading to Rh(iii)–H represents the major reaction pathway, which is highly oxygen sensitive. The oxidative quenching of the PF singlet state by Rhcat is a competing mechanism, which prevails in non-degassed systems.
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Affiliation(s)
- T Ghosh
- Institute of Organic Chemistry , University of Regensburg , D-93040 Regensburg , Germany .
| | - T Slanina
- Institute of Organic Chemistry , University of Regensburg , D-93040 Regensburg , Germany . .,Department of Chemistry , Faculty of Science , Masaryk University , Kamenice 5 , 62500 Brno , Czech Republic.,Research Centre for Toxic Compounds in the Environment , Faculty of Science , Masaryk University , Kamenice 5 , 62500 Brno , Czech Republic
| | - B König
- Institute of Organic Chemistry , University of Regensburg , D-93040 Regensburg , Germany .
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24
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Köhler V, Turner NJ. Artificial concurrent catalytic processes involving enzymes. Chem Commun (Camb) 2014; 51:450-64. [PMID: 25350691 DOI: 10.1039/c4cc07277d] [Citation(s) in RCA: 96] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The concurrent operation of multiple catalysts can lead to enhanced reaction features including (i) simultaneous linear multi-step transformations in a single reaction flask (ii) the control of intermediate equilibria (iii) stereoconvergent transformations (iv) rapid processing of labile reaction products. Enzymes occupy a prominent position for the development of such processes, due to their high potential compatibility with other biocatalysts. Genes for different enzymes can be co-expressed to reconstruct natural or construct artificial pathways and applied in the form of engineered whole cell biocatalysts to carry out complex transformations or, alternatively, the enzymes can be combined in vitro after isolation. Moreover, enzyme variants provide a wider substrate scope for a given reaction and often display altered selectivities and specificities. Man-made transition metal catalysts and engineered or artificial metalloenzymes also widen the range of reactivities and catalysed reactions that are potentially employable. Cascades for simultaneous cofactor or co-substrate regeneration or co-product removal are now firmly established. Many applications of more ambitious concurrent cascade catalysis are only just beginning to appear in the literature. The current review presents some of the most recent examples, with an emphasis on the combination of transition metal with enzymatic catalysis and aims to encourage researchers to contribute to this emerging field.
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Affiliation(s)
- Valentin Köhler
- Department of Chemistry, University of Basel, Spitalststrasse 51, CH-4056 Basel, Switzerland.
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25
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Oppelt KT, Gasiorowski J, Egbe DAM, Kollender JP, Himmelsbach M, Hassel AW, Sariciftci NS, Knör G. Rhodium-coordinated poly(arylene-ethynylene)-alt-poly(arylene-vinylene) copolymer acting as photocatalyst for visible-light-powered NAD⁺/NADH reduction. J Am Chem Soc 2014; 136:12721-9. [PMID: 25130570 PMCID: PMC4160281 DOI: 10.1021/ja506060u] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Indexed: 01/09/2023]
Abstract
A 2,2'-bipyridyl-containing poly(arylene-ethynylene)-alt-poly(arylene-vinylene) polymer, acting as a light-harvesting ligand system, was synthesized and coupled to an organometallic rhodium complex designed for photocatalytic NAD(+)/NADH reduction. The material, which absorbs over a wide spectral range, was characterized by using various analytical techniques, confirming its chemical structure and properties. The dielectric function of the material was determined from spectroscopic ellipsometry measurements. Photocatalytic reduction of nucleotide redox cofactors under visible light irradiation (390-650 nm) was performed and is discussed in detail. The new metal-containing polymer can be used to cover large surface areas (e.g. glass beads) and, due to this immobilization step, can be easily separated from the reaction solution after photolysis. Because of its high stability, the polymer-based catalyst system can be repeatedly used under different reaction conditions for (photo)chemical reduction of NAD(+). With this concept, enzymatic, photo-biocatalytic systems for solar energy conversion can be facilitated, and the precious metal catalyst can be recycled.
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Affiliation(s)
- Kerstin T. Oppelt
- Institute
of Inorganic Chemistry, Johannes Kepler
University Linz, Altenberger
Strasse 69, 4040 Linz, Austria
| | - Jacek Gasiorowski
- Linz
Institute of Organic Solar Cells (LIOS), Physical Chemistry, Johannes Kepler University Linz, Altenberger Strasse 69, 4040 Linz, Austria
- Semiconductor
Physics, Technical University of Chemnitz, Reichenhainer Strasse 70, 09126 Chemnitz, Germany
| | - Daniel Ayuk Mbi Egbe
- Linz
Institute of Organic Solar Cells (LIOS), Physical Chemistry, Johannes Kepler University Linz, Altenberger Strasse 69, 4040 Linz, Austria
| | - Jan Philipp Kollender
- Institute
of Chemical Technology of Inorganic Materials (ICTAS), Johannes Kepler University Linz, Altenberger Strasse 69, 4040 Linz, Austria
| | - Markus Himmelsbach
- Institute
of Analytical Chemistry (IAC), Johannes
Kepler University Linz, Altenberger Strasse 69, 4040 Linz, Austria
| | - Achim Walter Hassel
- Institute
of Chemical Technology of Inorganic Materials (ICTAS), Johannes Kepler University Linz, Altenberger Strasse 69, 4040 Linz, Austria
| | - Niyazi Serdar Sariciftci
- Linz
Institute of Organic Solar Cells (LIOS), Physical Chemistry, Johannes Kepler University Linz, Altenberger Strasse 69, 4040 Linz, Austria
| | - Günther Knör
- Institute
of Inorganic Chemistry, Johannes Kepler
University Linz, Altenberger
Strasse 69, 4040 Linz, Austria
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26
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Ryu J, Nam DH, Lee SH, Park CB. Biocatalytic Photosynthesis with Water as an Electron Donor. Chemistry 2014; 20:12020-5. [DOI: 10.1002/chem.201403301] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Indexed: 11/12/2022]
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Lee JS, Nam DH, Kuk SK, Park CB. Near-infrared-light-driven artificial photosynthesis by nanobiocatalytic assemblies. Chemistry 2014; 20:3584-8. [PMID: 24615772 DOI: 10.1002/chem.201400136] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2014] [Indexed: 11/07/2022]
Abstract
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.
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Affiliation(s)
- Joon Seok Lee
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 335 Science Road, Daejeon 305-701 (Republic of Korea)
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28
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Recent trends and novel concepts in cofactor-dependent biotransformations. Appl Microbiol Biotechnol 2013; 98:1517-29. [PMID: 24362856 DOI: 10.1007/s00253-013-5441-5] [Citation(s) in RCA: 100] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2013] [Revised: 11/25/2013] [Accepted: 11/26/2013] [Indexed: 12/21/2022]
Abstract
Cofactor-dependent enzymes catalyze a broad range of synthetically useful transformations. However, the cofactor requirement also poses economic and practical challenges for the application of these biocatalysts. For three decades, considerable research effort has been devoted to the development of reliable in situ regeneration methods for the most commonly employed cofactors, particularly NADH and NADPH. Today, researchers can choose from a plethora of options, and oxidoreductases are routinely employed even on industrial scale. Nevertheless, more efficient cofactor regeneration methods are still being developed, with the aim of achieving better atom economy, simpler reaction setups, and higher productivities. Besides, cofactor dependence has been recognized as an opportunity to confer novel reactivity upon enzymes by engineering their cofactors, and to couple (redox) biotransformations in multi-enzyme cascade systems. These novel concepts will help to further establish cofactor-dependent biotransformations as an attractive option for the synthesis of biologically active compounds, chiral building blocks, and bio-based platform molecules.
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McSkimming A, Colbran SB. The coordination chemistry of organo-hydride donors: new prospects for efficient multi-electron reduction. Chem Soc Rev 2013; 42:5439-88. [PMID: 23507957 DOI: 10.1039/c3cs35466k] [Citation(s) in RCA: 116] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
In biological reduction processes the dihydronicotinamides NAD(P)H often transfer hydride to an unsaturated substrate bound within an enzyme active site. In many cases, metal ions in the active site bind, polarize and thereby activate the substrate to direct attack by hydride from NAD(P)H cofactor. This review looks more widely at the metal coordination chemistry of organic donors of hydride ion--organo-hydrides--such as dihydronicotinamides, other dihydropyridines including Hantzsch's ester and dihydroacridine derivatives, those derived from five-membered heterocycles including the benzimidazolines and benzoxazolines, and all-aliphatic hydride donors such as hexadiene and hexadienyl anion derivatives. The hydride donor properties--hydricities--of organo-hydrides and how these are affected by metal ions are discussed. The coordination chemistry of organo-hydrides is critically surveyed and the use of metal-organo-hydride systems in electrochemically-, photochemically- and chemically-driven reductions of unsaturated organic and inorganic (e.g. carbon dioxide) substrates is highlighted. The sustainable electrocatalytic, photochemical or chemical regeneration of organo-hydrides such as NAD(P)H, including for driving enzyme-catalysed reactions, is summarised and opportunities for development are indicated. Finally, new prospects are identified for metal-organo-hydride systems as catalysts for organic transformations involving 'hydride-borrowing' and for sustainable multi-electron reductions of unsaturated organic and inorganic substrates directly driven by electricity or light or by renewable reductants such as formate/formic acid.
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Affiliation(s)
- Alex McSkimming
- School of Chemistry, The University of New South Wales, Sydney, NSW 2052, Australia
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31
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Nanobiocatalytic assemblies for artificial photosynthesis. Curr Opin Biotechnol 2013; 28:1-9. [PMID: 24832068 DOI: 10.1016/j.copbio.2013.10.008] [Citation(s) in RCA: 95] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Revised: 10/04/2013] [Accepted: 10/18/2013] [Indexed: 11/23/2022]
Abstract
Natural photosynthesis, a solar-to-chemical energy conversion process, occurs through a series of photo-induced electron transfer reactions in nanoscale architectures that contain light-harvesting complexes, protein-metal clusters, and many redox biocatalysts. 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 visible light-driven cofactor regeneration. The key requirement in the design of biocatalyzed artificial photosynthetic process is an efficient and forward electron transfer between each photosynthetic component. This review describes basic principles in combining redox biocatalysis with photocatalysis, and highlights recent research outcomes in the development of nanobiocatalytic assemblies that can mimic natural photosystems I and II, respectively. Current issues in biocatalyzed artificial photosynthesis and future perspectives will be briefly discussed.
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32
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Oppelt KT, Wöß E, Stiftinger M, Schöfberger W, Buchberger W, Knör G. Photocatalytic reduction of artificial and natural nucleotide co-factors with a chlorophyll-like tin-dihydroporphyrin sensitizer. Inorg Chem 2013; 52:11910-22. [PMID: 24073596 PMCID: PMC3805326 DOI: 10.1021/ic401611v] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
An
efficient photocatalytic two-electron reduction and protonation
of nicotine amide adenine dinucleotide (NAD+), as well
as the synthetic nucleotide co-factor analogue N-benzyl-3-carbamoyl-pyridinium
(BNAD+), powered by photons in the long-wavelength region
of visible light (λirr > 610 nm), is demonstrated
for the first time. This functional artificial photosynthetic counterpart
of the complete energy-trapping and solar-to-fuel conversion primary
processes occurring in natural photosystem I (PS I) is achieved with
a robust water-soluble tin(IV) complex of meso-tetrakis(N-methylpyridinium)-chlorin acting as the light-harvesting
sensitizer (threshold wavelength of λthr = 660 nm).
In buffered aqueous solution, this chlorophyll-like compound photocatalytically
recycles a rhodium hydride complex of the type [Cp*Rh(bpy)H]+, which is able to mediate regioselective hydride transfer processes.
Different one- and two-electron donors are tested for the reductive
quenching of the irradiated tin complex to initiate the secondary
dark reactions leading to nucleotide co-factor reduction. Very promising
conversion efficiencies, quantum yields, and excellent photosensitizer
stabilities are observed. As an example of a catalytic dark reaction
utilizing the reduction equivalents of accumulated NADH, an enzymatic
process for the selective transformation of aldehydes with alcohol
dehydrogenase (ADH) coupled to the primary photoreactions of the system
is also demonstrated. A tentative reaction mechanism for the transfer
of two electrons and one proton from the reductively quenched tin
chlorin sensitizer to the rhodium co-catalyst, acting as a reversible
hydride carrier, is proposed. An efficient photocatalytic
system for the two-electron
reduction of nucleotide co-factors has been characterized. For the
first time it could be demonstrated in an abiotic system that the
long-wavelength region of the visible spectrum (> 610 nm) can be
exploited
to power the accumulation of NADH. The artificial photosynthetic reaction
sequence, described here in detail, can be regarded as the first true
functional model system for the overall light reactions occurring
in natural photosystem I.
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Affiliation(s)
- Kerstin T Oppelt
- Institute of Inorganic Chemistry, and ‡Institute of Analytical Chemistry, Johannes Kepler University Linz (JKU) , A-4040 Linz, Austria
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Lee SH, Kim JH, Park CB. Coupling Photocatalysis and Redox Biocatalysis Toward Biocatalyzed Artificial Photosynthesis. Chemistry 2013; 19:4392-406. [DOI: 10.1002/chem.201204385] [Citation(s) in RCA: 111] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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