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Booth R, Whitwood AC, Duhme-Klair AK. Effect of Ligand Substituents on Spectroscopic and Catalytic Properties of Water-Compatible Cp*Ir-(pyridinylmethyl)sulfonamide-Based Transfer Hydrogenation Catalysts. Inorg Chem 2024; 63:3815-3823. [PMID: 38343274 PMCID: PMC10900292 DOI: 10.1021/acs.inorgchem.3c04040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 01/23/2024] [Accepted: 01/30/2024] [Indexed: 02/27/2024]
Abstract
Transition-metal-based hydrogenation catalysts have applications ranging from high-value chemical synthesis to medicinal chemistry. A series of (pyridinylmethyl)sulfonamide ligands substituted with electron-withdrawing and -donating groups were synthesized to study the influence of the electronic contribution of the bidentate ligand in Cp*Ir piano-stool complexes. A variable-temperature NMR investigation revealed a strong correlation between the electron-donating ability of the substituent and the rate of stereoinversion of the complexes. This correlation was partially reflected in the catalytic activity of the corresponding catalysts. Complexes with electron-withdrawing substituents followed the trend observed in the variable-temperature NMR study, thereby confirming the rate-determining step to be donation of the hydride ligand. Strongly electron-donating groups, on the other hand, caused a change in the rate-determining step in the formation of the iridium-hydride species. These results demonstrate that the activity of these catalysts can be tuned systematically via changes in the electronic contribution of the bidentate (pyridinylmethyl)sulfonamide ligands.
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Tensi L, Dall’Anese A, Annunziata A, Mearini S, Nofrini V, Menendez Rodriguez G, Carotti A, Sardella R, Ruffo F, Macchioni A. Synthesis and Characterization of Chiral Iridium Complexes Bearing Carbohydrate Functionalized Pyridincarboxamide Ligands and Their Application as Catalysts in the Asymmetric Transfer Hydrogenation of α-Ketoacids in Water. Organometallics 2023. [DOI: 10.1021/acs.organomet.2c00544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Leonardo Tensi
- Department of Chemistry, Biology and Biotechnology and CIRCC, University of Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy
- Department of Pharmaceutical Sciences, University of Perugia, Via A. Fabretti 48, 06123 Perugia, Italy
| | - Anna Dall’Anese
- Department of Chemistry, Biology and Biotechnology and CIRCC, University of Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy
| | - Alfonso Annunziata
- Department of Chemical Sciences and CIRCC, University of Naples Federico II, Via Cintia 21, 80126 Napoli, Italy
- Sorbonne Université, CNRS, Institut Parisien de Chimie Moléculaire (IPCM), 4 Place Jussieu, F-75005 Paris, France
| | - Simone Mearini
- Department of Chemistry, Biology and Biotechnology and CIRCC, University of Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy
| | - Vittorio Nofrini
- Department of Chemistry, Biology and Biotechnology and CIRCC, University of Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy
| | - Gabriel Menendez Rodriguez
- Department of Chemistry, Biology and Biotechnology and CIRCC, University of Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy
| | - Andrea Carotti
- Department of Pharmaceutical Sciences, University of Perugia, Via A. Fabretti 48, 06123 Perugia, Italy
| | - Roccaldo Sardella
- Department of Pharmaceutical Sciences, University of Perugia, Via A. Fabretti 48, 06123 Perugia, Italy
| | - Francesco Ruffo
- Department of Chemical Sciences and CIRCC, University of Naples Federico II, Via Cintia 21, 80126 Napoli, Italy
| | - Alceo Macchioni
- Department of Chemistry, Biology and Biotechnology and CIRCC, University of Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy
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Wang L, Wang L. Ligands modification strategies for mononuclear water splitting catalysts. Front Chem 2022; 10:996383. [PMID: 36238101 PMCID: PMC9551221 DOI: 10.3389/fchem.2022.996383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Accepted: 08/03/2022] [Indexed: 11/13/2022] Open
Abstract
Artificial photosynthesis (AP) has been proved to be a promising way of alleviating global climate change and energy crisis. Among various materials for AP, molecular complexes play an important role due to their favorable efficiency, stability, and activity. As a result of its importance, the topic has been extensively reviewed, however, most of them paid attention to the designs and preparations of complexes and their water splitting mechanisms. In fact, ligands design and preparation also play an important role in metal complexes’ properties and catalysis performance. In this review, we focus on the ligands that are suitable for designing mononuclear catalysts for water splitting, providing a coherent discussion at the strategic level because of the availability of various activity studies for the selected complexes. Two main designing strategies for ligands in molecular catalysts, substituents modification and backbone construction, are discussed in detail in terms of their potentials for water splitting catalysts.
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Topchiyan P, Vasilchenko D, Tkachev S, Sheven D, Eltsov I, Asanov I, Sidorenko N, Saraev A, Gerasimov E, Kurenkova A, Kozlova E. Highly Active Visible Light-Promoted Ir/ g-C 3N 4 Photocatalysts for the Water Oxidation Reaction Prepared from a Halogen-Free Iridium Precursor. ACS APPLIED MATERIALS & INTERFACES 2022; 14:35600-35612. [PMID: 35881890 DOI: 10.1021/acsami.2c07485] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
A combination of the exceptional stability of fac-[Ir(H2O)3(NO2)3] together with thermolability of nitro and aqua ligands and high solubility in various solvents makes it promising as a brand-new chlorine-free precursor of iridium for the preparation of heterogeneous catalysts. In the current work, a new technique of fac-[Ir(H2O)3(NO2)3] preparation based on hydrothermal treatment of (NH4)3[Ir(NO2)6] was developed. For this purpose, the influence of reaction parameters such as the reaction time, temperature, and pH of the solution on the process of hexanitroiridate salt hydrolysis was investigated. The synthesized fac-[Ir(H2O)3(NO2)3] solution in this optimized way was used for the preparation of the series of Ir/g-C3N4 catalysts, which were evaluated in the water oxidation reaction with NaIO4 utilized as a sacrificial reagent. A 20-fold enhancement of the oxygen evolution reaction (OER) activity was found to take place under visible light (λ = 411 nm) illumination of the systems. The highest rate of the photoinduced OER per iridium center was achieved by the Ir0.005/g-C3N4 (air, 400°C) catalyst with an exceptional turnover frequency value of 967 min-1 approaching the activity of known homogeneous iridium OER catalysts. The leaching experiments have shown that aquated Ir species are generated in a solution after prolonged functioning of the catalysts. Despite this, in the closed system the photodriven OER activity persists at a steady-state level evidencing an equilibrium achieved between dissolved and anchored Ir species forming catalytic tandem with the g-C3N4.
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Affiliation(s)
- Polina Topchiyan
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Science, 630090 Novosibirsk, Russian Federation
- Federal Research Center Boreskov Institute of Catalysis, 630090 Novosibirsk, Russian Federation
| | - Danila Vasilchenko
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Science, 630090 Novosibirsk, Russian Federation
- Federal Research Center Boreskov Institute of Catalysis, 630090 Novosibirsk, Russian Federation
| | - Sergey Tkachev
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Science, 630090 Novosibirsk, Russian Federation
| | - Dmitriy Sheven
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Science, 630090 Novosibirsk, Russian Federation
| | - Ilia Eltsov
- Novosibirsk State University, 630090 Novosibirsk, Russian Federation
| | - Igor Asanov
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Science, 630090 Novosibirsk, Russian Federation
| | - Nikolay Sidorenko
- Federal Research Center Boreskov Institute of Catalysis, 630090 Novosibirsk, Russian Federation
- Novosibirsk State University, 630090 Novosibirsk, Russian Federation
| | - Andrey Saraev
- Federal Research Center Boreskov Institute of Catalysis, 630090 Novosibirsk, Russian Federation
| | - Evgeny Gerasimov
- Federal Research Center Boreskov Institute of Catalysis, 630090 Novosibirsk, Russian Federation
| | - Anna Kurenkova
- Federal Research Center Boreskov Institute of Catalysis, 630090 Novosibirsk, Russian Federation
| | - Ekaterina Kozlova
- Federal Research Center Boreskov Institute of Catalysis, 630090 Novosibirsk, Russian Federation
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Bazargan M, Mirzaei M, Hamid AS, Kafshdar ZH, Ziaekhodadadian H, Momenzadeh E, Mague JT, Gil DM, Gomila RM, Frontera A. On the importance of π-stacking interactions in the complexes of copper and zinc bearing pyridine-2,6-dicarboxylic acid N-oxide and N-donor auxiliary ligands. CrystEngComm 2022. [DOI: 10.1039/d2ce00656a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Using N- and O-donor ligands in a mixed-ligand system, three new coordination complexes have been X-ray characterized, exhibiting strong π–π stacking interactions.
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Affiliation(s)
- Maryam Bazargan
- Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad 9177948974, Iran
| | - Masoud Mirzaei
- Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad 9177948974, Iran
| | - Abdul Samad Hamid
- Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad 9177948974, Iran
| | | | - Hoda Ziaekhodadadian
- Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad 9177948974, Iran
| | - Elham Momenzadeh
- Department of Chemistry, Faculty of Science, Ferdowsi University of Mashhad, Mashhad 9177948974, Iran
| | - Joel T. Mague
- Department of Chemistry, Tulane University, New Orleans, LA, 70118, USA
| | - Diego M. Gil
- INBIOFAL (CONICET – UNT), Instituto de Química Orgánica, Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, Ayacucho 471, T4000INI, San Miguel de Tucumán, Argentina
| | - Rosa M. Gomila
- Departament de Química, Universitat de les Illes Balears, Crta de Valldemossa km 7.5, 07122 Palma de Mallorca, Baleares, SPAIN
| | - Antonio Frontera
- Departament de Química, Universitat de les Illes Balears, Crta de Valldemossa km 7.5, 07122 Palma de Mallorca, Baleares, SPAIN
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