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Khan S, Sengupta S, Khan MA, Sk MP, Jana NC, Naskar S. Electrocatalytic Water Oxidation by Mononuclear Copper Complexes of Bis-amide Ligands with N4 Donor: Experimental and Theoretical Investigation. Inorg Chem 2024; 63:1888-1897. [PMID: 38232755 DOI: 10.1021/acs.inorgchem.3c03512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2024]
Abstract
The present work describes electrocatalytic water oxidation of three monomeric copper complexes [CuII(L1)] (1), [CuII(L2)(H2O)] (2), and [CuII(L3)] (3) with bis-amide tetradentate ligands: L1 = N,N'-(1,2-phenylene)dipicolinamide, L2 = N,N'-(4,5-dimethyl-1,2-phenylene)bis(pyrazine-2-carboxamide), L3 = N,N'-(1,2-phenylene)bis(pyrazine-2-carboxamide), for the production of molecular oxygen by the oxidation of water at pH 13.0. Ligands and all complexes have been synthesized and characterized by single crystal XRD, analytical, and spectroscopic techniques. X-ray crystallographic data show that the ligand coordinates to copper in a dianionic fashion through deprotonation of two -NH protons. Cyclic voltammetry study shows a reversible copper-centered redox couple with one ligand-based oxidation event. The electrocatalytic water oxidation occurs at an onset potential of 1.16 (overpotential, η ≈ 697 mV), 1.2 (η ≈ 737 mV), and 1.23 V (η ≈ 767 mV) for 1, 2, and 3 respectively. A systematic variation of the ligand scaffold has been found to display a profound effect on the rate of electrocatalytic oxygen evolution. The results of the theoretical (density functional theory) studies show the stepwise ligand-centered oxidation process and the formation of the O-O bond during water oxidation passes through the water nucleophilic attack for all the copper complexes. At pH = 13, the turnover frequencies have been experimentally obtained as 88, 1462, and 10 s-1 (peak current measurements) for complexes 1, 2, and 3, respectively. Production of oxygen gas during controlled potential electrolysis was detected by gas chromatography.
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Affiliation(s)
- Sahanwaj Khan
- Department of Chemistry, Birla Institute of Technology-Mesra, Ranchi 835215, India
| | - Swaraj Sengupta
- Department of Chemical Engineering, Birla Institute of Technology-Mesra, Ranchi 835215, India
| | - Md Adnan Khan
- Department of Chemistry, Birla Institute of Technology-Mesra, Ranchi 835215, India
| | - Md Palashuddin Sk
- Department of Chemistry, Aligarh Muslim University, Aligarh 202002, India
| | - Narayan Ch Jana
- School of Chemical Sciences, NISER, An OCC of Homi Bhabha National Institute, Bhubaneswar 752050, India
| | - Subhendu Naskar
- Department of Chemistry, Birla Institute of Technology-Mesra, Ranchi 835215, India
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Deshmukh MA, Park SJ, Thorat HN, Bodkhe GA, Ramanavicius A, Ramanavicius S, Shirsat MD, Ha TJ. Advanced Energy Materials: Current Trends and Challenges in Electro- and Photo-Catalysts for H2O Splitting. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.11.054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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3
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Khan MA, Sen UR, Khan S, Sengupta S, Shruti S, Naskar S. Manganese based Molecular Water Oxidation Catalyst: From Natural to Artificial Photosynthesis. COMMENT INORG CHEM 2022. [DOI: 10.1080/02603594.2022.2130273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
| | | | - Sahanwaj Khan
- Department of Chemistry, Birla Institute of Technology-Mesra, Ranchi, India
| | - Swaraj Sengupta
- Department of Chemical Engineering, Birla Institute of Technology-Mesra, Ranchi, India
| | - Sonal Shruti
- Department of Chemistry, Birla Institute of Technology-Mesra, Ranchi, India
| | - Subhendu Naskar
- Department of Chemistry, Birla Institute of Technology-Mesra, Ranchi, India
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Xu B, Chen Y, Yao R, Chen C, Zhang C. Redox‐Induced Structural Change in Artificial Heterometallic‐Oxide Cluster Mimicking the Photosynthetic Oxygen‐Evolving Center. Chemistry 2022; 28:e202201456. [DOI: 10.1002/chem.202201456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Indexed: 11/06/2022]
Affiliation(s)
- Boran Xu
- Laboratory of Photochemistry Institute of Chemistry Chinese Academy of Sciences 100190 Beijing P. R. China
- University of Chinese Academy of Sciences 100049 Beijing P. R. China
| | - Yang Chen
- Laboratory of Photochemistry Institute of Chemistry Chinese Academy of Sciences 100190 Beijing P. R. China
- University of Chinese Academy of Sciences 100049 Beijing P. R. China
| | - Ruoqing Yao
- Laboratory of Photochemistry Institute of Chemistry Chinese Academy of Sciences 100190 Beijing P. R. China
- University of Chinese Academy of Sciences 100049 Beijing P. R. China
| | - Changhui Chen
- Laboratory of Photochemistry Institute of Chemistry Chinese Academy of Sciences 100190 Beijing P. R. China
- University of Chinese Academy of Sciences 100049 Beijing P. R. China
| | - Chunxi Zhang
- Laboratory of Photochemistry Institute of Chemistry Chinese Academy of Sciences 100190 Beijing P. R. China
- University of Chinese Academy of Sciences 100049 Beijing P. R. China
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5
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Insight into the huge difference in redox potential between the structural OEC analogues Mn3CaO4 and Mn4CaO4. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.121023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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6
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Gao X, Fan H. The Role of Redox-Inactive Metals in Modulating the Redox Potential of the Mn 4CaO 4 Model Complex. Inorg Chem 2022; 61:11539-11549. [PMID: 35839298 DOI: 10.1021/acs.inorgchem.2c00243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Photosynthetic oxygen-evolving center (OEC), the "engine of life", is a unique Mn4CaO5 cluster catalyzing the water oxidation. The role of redox-inactive component Ca2+, which can only be functionally replaced by Sr2+ in a biological environment, has been under debate for a long time. Recently, its modulating effect on the redox potential of native OEC and artificial structural OEC model complex has received great attention, and linear relationship between the potential and the Lewis acidity of the redox-inactive metal has been proposed for the MMn3O4 model complex. In this work, the modulating effect has been studied in detail using the Mn4CaO4 model complex, which is the closest structural model to OEC to date and has a similar redox potential at the S1-S2 transition. We found the redox-inactive metal only has a weak modulating effect on the potential, which is comparable in strength to that of the ligand environments. Meanwhile, the net charge of the complex, which could be changed along with the redox-inactive metal, has a high impact on the potential and can be unified by protonation, deprotonation, or ligand modification. Although the modulating effect of the redox-inactive metal is not very strong, the linear relationship between the potential and the Lewis acidity is still valid for Mn4MO4 complexes. Our results of strong modulating effects for net charge and weak modulating effects for redox-inactive metal fit with the previous experimental observations on Mn4MO4 (M = Ca2+, Y3+, and Gd3+) model complexes, and suggest that Ca2+ can be structurally and electrochemically replaced with other metal cations, together with proper ligand modifications.
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Affiliation(s)
- Xianrui Gao
- Shenyang University of Chemical Technology, Shenyang 110142, China.,State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, China
| | - Hongjun Fan
- Shenyang University of Chemical Technology, Shenyang 110142, China.,State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, China
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Chen Y, Xu B, Yao R, Chen C, Zhang C. Mimicking the Oxygen-Evolving Center in Photosynthesis. FRONTIERS IN PLANT SCIENCE 2022; 13:929532. [PMID: 35874004 PMCID: PMC9302449 DOI: 10.3389/fpls.2022.929532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Accepted: 06/20/2022] [Indexed: 06/15/2023]
Abstract
The oxygen-evolving center (OEC) in photosystem II (PSII) of oxygenic photosynthetic organisms is a unique heterometallic-oxide Mn4CaO5-cluster that catalyzes water splitting into electrons, protons, and molecular oxygen through a five-state cycle (Sn, n = 0 ~ 4). It serves as the blueprint for the developing of the man-made water-splitting catalysts to generate solar fuel in artificial photosynthesis. Understanding the structure-function relationship of this natural catalyst is a great challenge and a long-standing issue, which is severely restricted by the lack of a precise chemical model for this heterometallic-oxide cluster. However, it is a great challenge for chemists to precisely mimic the OEC in a laboratory. Recently, significant advances have been achieved and a series of artificial Mn4XO4-clusters (X = Ca/Y/Gd) have been reported, which closely mimic both the geometric structure and the electronic structure, as well as the redox property of the OEC. These new advances provide a structurally well-defined molecular platform to study the structure-function relationship of the OEC and shed new light on the design of efficient catalysts for the water-splitting reaction in artificial photosynthesis.
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Affiliation(s)
- Yang Chen
- Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Boran Xu
- Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Ruoqing Yao
- Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Changhui Chen
- Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China
| | - Chunxi Zhang
- Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China
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Fratilescu I, Lascu A, Taranu BO, Epuran C, Birdeanu M, Macsim AM, Tanasa E, Vasile E, Fagadar-Cosma E. One A3B Porphyrin Structure—Three Successful Applications. NANOMATERIALS 2022; 12:nano12111930. [PMID: 35683785 PMCID: PMC9182125 DOI: 10.3390/nano12111930] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 05/26/2022] [Accepted: 06/03/2022] [Indexed: 11/16/2022]
Abstract
Porphyrins are versatile structures capable of acting in multiple ways. A mixed substituted A3B porphyrin, 5-(3-hydroxy-phenyl)-10,15,20-tris-(3-methoxy-phenyl)-porphyrin and its Pt(II) complex, were synthesised and fully characterised by 1H- and 13C-NMR, TLC, UV-Vis, FT-IR, fluorescence, AFM, TEM and SEM with EDX microscopy, both in organic solvents and in acidic mediums. The pure compounds were used, firstly, as sensitive materials for sensitive and selective optical and fluorescence detection of hydroquinone with the best results in the range 0.039–6.71 µM and a detection limit of 0.013 µM and, secondly, as corrosion inhibitors for carbon–steel (OL) in an acid medium giving a best performance of 88% in the case of coverings with Pt-porphyrin. Finally, the electrocatalytic activity for the hydrogen and oxygen evolution reactions (HER and OER) of the free-base and Pt-metalated A3B porphyrins was evaluated in strong alkaline and acidic electrolyte solutions. The best results were obtained for the electrode modified with the metalated porphyrin, drop-casted on a graphite substrate from an N,N-dimethylformamide solution. In the strong acidic medium, the electrode displayed an HER overpotential of 108 mV, at i = −10 mA/cm2 and a Tafel slope value of 205 mV/dec.
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Affiliation(s)
- Ion Fratilescu
- Institute of Chemistry “Coriolan Dragulescu”, Mihai Viteazu Ave. 24, 300223 Timisoara, Romania; (I.F.); (A.L.); (C.E.)
| | - Anca Lascu
- Institute of Chemistry “Coriolan Dragulescu”, Mihai Viteazu Ave. 24, 300223 Timisoara, Romania; (I.F.); (A.L.); (C.E.)
| | - Bogdan Ovidiu Taranu
- National Institute for Research and Development in Electrochemistry and Condensed Matter, Plautius Andronescu Street 1, 300224 Timisoara, Romania;
- Correspondence: (B.O.T.); (E.F.-C.)
| | - Camelia Epuran
- Institute of Chemistry “Coriolan Dragulescu”, Mihai Viteazu Ave. 24, 300223 Timisoara, Romania; (I.F.); (A.L.); (C.E.)
| | - Mihaela Birdeanu
- National Institute for Research and Development in Electrochemistry and Condensed Matter, Plautius Andronescu Street 1, 300224 Timisoara, Romania;
| | - Ana-Maria Macsim
- Institute of Macromolecular Chemistry “Petru Poni”, Grigore Ghica Vodă Alley, No. 41A, 700487 Iasi, Romania;
| | - Eugenia Tanasa
- Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Splaiul Independentei 313, Sector 6, 060042 Bucharest, Romania; (E.T.); (E.V.)
| | - Eugeniu Vasile
- Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Splaiul Independentei 313, Sector 6, 060042 Bucharest, Romania; (E.T.); (E.V.)
| | - Eugenia Fagadar-Cosma
- Institute of Chemistry “Coriolan Dragulescu”, Mihai Viteazu Ave. 24, 300223 Timisoara, Romania; (I.F.); (A.L.); (C.E.)
- Correspondence: (B.O.T.); (E.F.-C.)
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Chen C, Xu B, Yao R, Chen Y, Zhang C. Synthesizing Mechanism of the Mn 4 Ca Cluster Mimicking the Oxygen-Evolving Center in Photosynthesis. CHEMSUSCHEM 2022; 15:e202102661. [PMID: 35075776 DOI: 10.1002/cssc.202102661] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 01/19/2022] [Indexed: 06/14/2023]
Abstract
The photosynthetic oxygen-evolving center (OEC) is a unique Mn4 CaO5 cluster that serves as a blueprint to develop superior water-splitting catalysts for the generation of solar fuels in artificial photosynthesis. It is a great challenge and long-standing issue to reveal the synthesizing mechanism of this Mn4 CaO5 cluster in both natural and artificial photosynthesis. Herein, efforts were made to reveal the synthesizing mechanism of an artificial Mn4 CaO4 cluster, a close mimic of the OEC. Four key intermediates were successfully isolated and structurally characterized for the first time. It was demonstrated that the Mn4 CaO4 cluster could be formed through a reaction between a thermodynamically stable Mn3 CaO4 cluster and an unusual four-coordinated MnIII ion, followed by stabilization process through binding an organic base (e.g., pyridine) on the "dangling" Mn ion. These findings shed new light on the synthesizing mechanism of the OEC and rational design of new artificial water-splitting catalysts.
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Affiliation(s)
- Changhui Chen
- Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
| | - Boran Xu
- Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Ruoqing Yao
- Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yang Chen
- Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Chunxi Zhang
- Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China
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10
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Yao R, Li Y, Chen Y, Xu B, Chen C, Zhang C. Rare-Earth Elements Can Structurally and Energetically Replace the Calcium in a Synthetic Mn 4CaO 4-Cluster Mimicking the Oxygen-Evolving Center in Photosynthesis. J Am Chem Soc 2021; 143:17360-17365. [PMID: 34643379 DOI: 10.1021/jacs.1c09085] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The oxygen-evolving center (OEC) in photosynthesis is a unique biological Mn4CaO5 cluster catalyzing the water-splitting reaction. A great current challenge is to achieve a robust and precise mimic of the OEC in the laboratory. Herein, we report synthetic Mn4XO4 clusters (X = calcium, yttrium, gadolinium) that closely resemble the OEC with regard to the main metal-oxide core and peripheral ligands, as well as the oxidation states of the four Mn ions and the redox potential of the cluster. We demonstrate that rare-earth elements can structurally replace the calcium in neutral Mn4XO4 clusters. All three Mn4XO4 clusters with different redox-inactive metal ions display essentially the same redox properties, challenging the conventional view that the Lewis acidity of the redox-inactive metal ions could modulate the redox potential of the heteronuclear-oxide clusters. The new synthetic rare-earth element-containing Mn4XO4 clusters reported here provide robust and structurally well-defined chemical models and shed new light on the design of new water-splitting catalysts in artificial photosynthesis.
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Affiliation(s)
- Ruoqing Yao
- Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yanxi Li
- Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yang Chen
- Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Boran Xu
- Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Changhui Chen
- Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Chunxi Zhang
- Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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Bio-Inspired Molecular Catalysts for Water Oxidation. Catalysts 2021. [DOI: 10.3390/catal11091068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The catalytic tetranuclear manganese-calcium-oxo cluster in the photosynthetic reaction center, photosystem II, provides an excellent blueprint for light-driven water oxidation in nature. The water oxidation reaction has attracted intense interest due to its potential as a renewable, clean, and environmentally benign source of energy production. Inspired by the oxygen-evolving complex of photosystem II, a large of number of highly innovative synthetic bio-inspired molecular catalysts are being developed that incorporate relatively cheap and abundant metals such as Mn, Fe, Co, Ni, and Cu, as well as Ru and Ir, in their design. In this review, we briefly discuss the historic milestones that have been achieved in the development of transition metal catalysts and focus on a detailed description of recent progress in the field.
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