1
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Martínez-Vivas S, Poyatos M, Peris E. Supramolecular Control of the Oxidative Addition as a Way To Improve the Catalytic Efficiency of Pincer-Rhodium (I) Complexes. Angew Chem Int Ed Engl 2023; 62:e202307198. [PMID: 37342877 DOI: 10.1002/anie.202307198] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 06/21/2023] [Accepted: 06/21/2023] [Indexed: 06/23/2023]
Abstract
1 H NMR studies using a cationic complex with a pyridine-di-imidazolylidene pincer ligand of formula [Rh(CNC)(CO)]+ revealed that this compound showed high binding affinity with coronene in CH2 Cl2 . The interaction between coronene and the planar RhI complex is established by means of π-stacking interactions. This interaction has a strong impact on the electron-donating strength of the pincer CNC ligand, which is increased significantly, as demonstrated by the shifting of the ν(CO) stretching bands to lower frequencies. The addition of coronene increases the reaction rate of the nucleophilic attack of methyl iodide on the rhodium (I) pincer complex, and also has a positive effect on the performance of the complex as a catalyst in the cycloisomerization of 4-pentynoic acid. These findings highlight the importance of supramolecular interactions for tuning the reactivity and catalytic activity of square-planar metal complexes.
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Affiliation(s)
- Sebastián Martínez-Vivas
- Institute of Advanced Materials (INAM)., Universitat Jaume I, Av. Vicente Sos Baynat s/n., 12071, Castellón, Spain
| | - Macarena Poyatos
- Institute of Advanced Materials (INAM)., Universitat Jaume I, Av. Vicente Sos Baynat s/n., 12071, Castellón, Spain
| | - Eduardo Peris
- Institute of Advanced Materials (INAM)., Universitat Jaume I, Av. Vicente Sos Baynat s/n., 12071, Castellón, Spain
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2
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Marczyk A, Trzaskowski B. Ruthenium Metathesis Catalysts Bearing Anionic N-Heterocyclic Carbenes: A Computational Study on Failed Approaches to Their Synthesis. Organometallics 2023. [DOI: 10.1021/acs.organomet.3c00068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
Affiliation(s)
- Anna Marczyk
- Centre of New Technologies, University of Warsaw, ul. Banacha 2C, 02-097 Warsaw, Poland
- Faculty of Chemistry, University of Warsaw, ul. Pasteura 1, 02-091 Warsaw, Poland
| | - Bartosz Trzaskowski
- Centre of New Technologies, University of Warsaw, ul. Banacha 2C, 02-097 Warsaw, Poland
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3
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Sahoo SR, Bera D, Saha S, Goswami N. Switchable catalysis and CO 2 sensing by reduction resistant, luminescent copper-thiolate complexes. NANOSCALE 2022; 14:18051-18059. [PMID: 36448343 DOI: 10.1039/d2nr05396a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Metal-thiolate complexes have been the focus of research for several years because of their unique photophysical properties and their use as a precursor for synthesizing various well-defined metal nanoclusters. A rational understanding of their structure-property relationship is necessary to realize their full potential in practical applications. Herein, we demonstrate the synthesis of a unique copper-thiolate complex with reversibly switchable catalytic and photoluminescence (PL) properties. The as-synthesized complex at basic pH (Complex B) showed cyan PL with a strong peak at ∼488 nm (cyan) and a small shoulder peak at ∼528 nm (green). When the pH of the complex was changed to acidic (Complex A), the PL was switched to light green. Such pH-responsive PL properties were demonstrated to be useful for pH and CO2 sensing. The switchable properties originate from their two distinct structural states at two different pHs. We found that Complex A was resistant to high concentrations of a strong reducing agent, and had an intermediate oxidation state of copper (Cu+) with good thermodynamic stability. Furthermore, the switchable catalytic property was investigated with a 4-nitrophenol reduction and 3,3',5,5'-tetramethylbenzidine (TMB) oxidation reaction. The reduction kinetics followed pseudo-first-order, where the catalytic activity was enhanced by more than 103 times when Complex B was switched to Complex A. A similar trend was also observed for TMB oxidation. Our design strategy demonstrates that redox switchable metal-thiolate complexes could be a powerful candidate for a plethora of applications.
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Affiliation(s)
- Satya Ranjan Sahoo
- Materials Chemistry Department, CSIR-Institute of Minerals & Materials Technology, Bhubaneswar, Odisha 751013, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
| | - Debkumar Bera
- Materials Chemistry Department, CSIR-Institute of Minerals & Materials Technology, Bhubaneswar, Odisha 751013, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
| | - Sumit Saha
- Materials Chemistry Department, CSIR-Institute of Minerals & Materials Technology, Bhubaneswar, Odisha 751013, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
| | - Nirmal Goswami
- Materials Chemistry Department, CSIR-Institute of Minerals & Materials Technology, Bhubaneswar, Odisha 751013, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
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4
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Chen X, Liu F. Synthesis and Phase Behavior of a Linear Amphiphilic Multiblock Copolymer. ACS OMEGA 2022; 7:19319-19327. [PMID: 35722003 PMCID: PMC9202289 DOI: 10.1021/acsomega.2c00734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Accepted: 04/26/2022] [Indexed: 06/15/2023]
Abstract
Linear amphiphilic multiblock copolymer PPMPEs, obtained through a stepwise method, and linear amphiphilic random copolymer PPMPEs-1, obtained through a one-pot method, were synthesized using poly(propylene glycol) diglycidyl ether (PPGDGE), poly(ethylene glycol) diglycidyl ether (PEGDGE), and monoethanolamine (MEA) as the main raw materials. The structures of PPMPEs and PPMPEs-1 were characterized by FT-IR, 1H NMR, and gel permeation chromatography, which proved that the copolymers were synthesized with different components. Transmittance of the copolymer was tested by UV-vis. By changing the ratio of PEGDGE content and the concentration of the copolymer aqueous solution, the phase behaviors of PPMPEs and PPMPEs-1 were compared and studied in depth. It mainly highlighted the advantages of the stepwise method compared to the one-pot method. The transmittance of the polymer solutions could be improved by lowering the pH value in the acidic solution or increasing the pH value in the alkaline solution. Moreover, as the reaction degree of the PPMPEs hydrophobic chain segment increased, the transmittance decreased.
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5
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Ghorbani-Choghamarani A, Taherinia Z. Recent advances utilized in artificial switchable catalysis. RSC Adv 2022; 12:23595-23617. [PMID: 36090388 PMCID: PMC9389550 DOI: 10.1039/d2ra03842k] [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: 06/22/2022] [Accepted: 07/30/2022] [Indexed: 11/29/2022] Open
Abstract
Developing “green” catalytic systems with desirable performance such as solubility, recyclability, and switchability is a great challenge. However, inspired by nature, the studies on synthesis and activity of artificial switchable metal catalysts and organocatalysts have become an intense, fervid, and challenging field of research. The peculiarity of these catalysts is that they can be generally triggered in the “on” or “off” states by several external stimuli such as light, heat, solvents, pH change, coordination events or ion influxes, redox processes, mechanical forces, or other changes in reaction conditions. A large number of review articles are available in these areas. However, most efforts are currently focused on the invention of new types of switchable catalysts with different forms of stimuli–response units incorporated within their architectures in order to achieve control over the catalytic activity and regio-, chemo- and stereocontrol of various chemical reactions. Thus, in this review, we begin with a brief introduction to switchable catalysts, followed by discussion of types of stimuli and the influence factors on their activities in the field of biomedical engineering, and catalysis as well as related catalytic mechanisms summarized and discussed. The emphasis is on the recent advances utilized in artificial switchable catalysis. Catalytic systems based on the use of stimuli–responsive materials can be switched from an “on” active state to an “off” inactive state. Consequently, switchable catalysis, both chemical and biological, has played a pivotal role in this ‘greening’ of the pharmaceutical industry.![]()
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Affiliation(s)
| | - Zahra Taherinia
- Department of Chemistry, Ilam University, P. O. Box 69315516, Ilam, Iran
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6
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Park S, Byun S, Ryu H, Hahm H, Lee J, Hong S. Reversibly Photoswitchable Catalysts for Olefin Metathesis Reactions. ACS Catal 2021. [DOI: 10.1021/acscatal.1c04281] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Seongwook Park
- Department of Chemistry, Gwangju Institute of Science and Technology, 123 Cheomdan-gwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea
- Grubbs Center for Polymers and Catalysis, Gwangju Institute of Science and Technology, 123 Cheomdan-gwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea
| | - Seunghwan Byun
- Department of Chemistry, Gwangju Institute of Science and Technology, 123 Cheomdan-gwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea
| | - Huijeoung Ryu
- Department of Chemistry, Gwangju Institute of Science and Technology, 123 Cheomdan-gwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea
| | - Hyungwoo Hahm
- Department of Chemistry, Gwangju Institute of Science and Technology, 123 Cheomdan-gwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea
| | - Junseong Lee
- Department of Chemistry, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea
| | - Sukwon Hong
- Department of Chemistry, Gwangju Institute of Science and Technology, 123 Cheomdan-gwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea
- Grubbs Center for Polymers and Catalysis, Gwangju Institute of Science and Technology, 123 Cheomdan-gwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology, 123 Cheomdan-gwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea
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7
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Ruiz‐Zambrana C, Gutiérrez‐Blanco A, Gonell S, Poyatos M, Peris E. Redox‐Switchable Cycloisomerization of Alkynoic Acids with Napthalenediimide‐Derived N‐Heterocyclic Carbene Complexes. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202107973] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- César Ruiz‐Zambrana
- Institute of Advanced Materials (INAM). Universitat Jaume I. Av. Vicente Sos Baynat s/n. 12071 Castellón Spain
| | - Ana Gutiérrez‐Blanco
- Institute of Advanced Materials (INAM). Universitat Jaume I. Av. Vicente Sos Baynat s/n. 12071 Castellón Spain
| | - Sergio Gonell
- Institute of Advanced Materials (INAM). Universitat Jaume I. Av. Vicente Sos Baynat s/n. 12071 Castellón Spain
| | - Macarena Poyatos
- Institute of Advanced Materials (INAM). Universitat Jaume I. Av. Vicente Sos Baynat s/n. 12071 Castellón Spain
| | - Eduardo Peris
- Institute of Advanced Materials (INAM). Universitat Jaume I. Av. Vicente Sos Baynat s/n. 12071 Castellón Spain
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8
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Ruiz-Zambrana C, Gutiérrez-Blanco A, Gonell S, Poyatos M, Peris E. Redox-Switchable Cycloisomerization of Alkynoic Acids with Napthalenediimide-Derived N-Heterocyclic Carbene Complexes. Angew Chem Int Ed Engl 2021; 60:20003-20011. [PMID: 34255909 PMCID: PMC8457061 DOI: 10.1002/anie.202107973] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Indexed: 12/22/2022]
Abstract
Two naphthalene‐diimide (NDI) bis‐imidazolium salts have been used as N‐heterocyclic carbene (NHC) precursors for the preparation of NDI‐functionalized complexes of rhodium and iridium of general formula [MCl(NDI‐NHC)(COD)] (M=Rh, Ir; NDI‐NHC=NDI‐functionalized NHC ligand). Comparison of the IR spectra of the complexes [IrCl(NDI‐NHC)(CO)2] and their related one‐ and two‐electron reduced forms, reveal that each one‐electron reduction produces a decrease of the average ν(CO) of 9–10 cm−1, indicating a significant enhancement of the electron‐richness of the metal. The [MCl(NDI‐NHC)(COD)] complexes were tested in the catalytic cycloisomerization of alkynoic acids. The one‐electron reduced forms showed greatly enhanced activities. For the cyclization of 5‐hexynoic acid, the two‐electron reduction of the ligand produced further enhancement of the catalytic activity, therefore showing that the catalyst can switch between three redox species with three distinct catalytic activities.
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Affiliation(s)
- César Ruiz-Zambrana
- Institute of Advanced Materials (INAM)., Universitat Jaume I., Av. Vicente Sos Baynat s/n., 12071, Castellón, Spain
| | - Ana Gutiérrez-Blanco
- Institute of Advanced Materials (INAM)., Universitat Jaume I., Av. Vicente Sos Baynat s/n., 12071, Castellón, Spain
| | - Sergio Gonell
- Institute of Advanced Materials (INAM)., Universitat Jaume I., Av. Vicente Sos Baynat s/n., 12071, Castellón, Spain
| | - Macarena Poyatos
- Institute of Advanced Materials (INAM)., Universitat Jaume I., Av. Vicente Sos Baynat s/n., 12071, Castellón, Spain
| | - Eduardo Peris
- Institute of Advanced Materials (INAM)., Universitat Jaume I., Av. Vicente Sos Baynat s/n., 12071, Castellón, Spain
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9
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Majee D, Presolski S. Dithienylethene-Based Photoswitchable Catalysts: State of the Art and Future Perspectives. ACS Catal 2021. [DOI: 10.1021/acscatal.0c05232] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Debashis Majee
- Division of Science (Chemistry), Yale-NUS College 16 College Ave West, Singapore 138527
| | - Stanislav Presolski
- Division of Science (Chemistry), Yale-NUS College 16 College Ave West, Singapore 138527
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10
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Zhong Y, Li M, Deng M, Gong M, Xie H, Luo Y. Redox-controlled syndio-specific polymerization of styrene catalyzed by ferrocenyl functionalized half-sandwich scandium complexes. Dalton Trans 2020; 50:346-354. [PMID: 33313616 DOI: 10.1039/d0dt03680c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Redox-controlled polymerization is one of the new and efficient strategies to precisely construct the microstructures of polymeric materials, and thus has received increasing attention in the chemical community. Salt metathesis of ScCl3 with 1 equiv. of Fc(1-C9H6)Li (where Fc = ferrocenyl group), followed by the addition of 2 equiv. of LiCH2C6H4NMe2-o in THF at room temperature gave the ferrocenyl functionalized half-sandwich scandium bis(o-dimethylaminobenzyl) complex [Fc(1-C9H6)]Sc(CH2C6H4NMe2-o)2 (1) in 89% isolated yield. This complex was characterized by elemental analysis, FT-IR spectroscopy, NMR spectroscopy and single-crystal X-ray diffraction. Treatment of 1 with 1 equiv. of [Ph3C][B(C6F5)4] in THF generated the THF-coordinated cationic half-sandwich scandium mono(o-dimethylaminobenzyl) complex {[Fc(1-C9H6)]Sc(CH2C6H4NMe2-o)}{[B(C6F5)4]} (2-THF2). Switching in situ between the oxidized and reduced forms of active THF-free species (originally generated from 1/[Ph3C][B(C6F5)4] in situ) resulted in the redox-controlled syndio-specific polymerization of styrene.
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Affiliation(s)
- Yi Zhong
- School of Materials Science and Chemical Engineering, Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province, Ningbo University, Ningbo 315211, P. R. China.
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11
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Jawiczuk M, Marczyk A, Młodzikowska-Pieńko K, Trzaskowski B. Impact of the Carbene Derivative Charge on the Decomposition Rates of Hoveyda-Grubbs-like Metathesis Catalysts. J Phys Chem A 2020; 124:6158-6167. [PMID: 32639748 PMCID: PMC7460089 DOI: 10.1021/acs.jpca.0c03096] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
![]()
Hoveyda–Grubbs
metathesis catalysts undergo a relatively
fast decomposition in the presence of olefins. Using a computational
density functional theory approach, we show that positively charged
derivatives of N-heterocyclic carbenes have little impact on the degradation/deactivation
rates of such catalysts with respect to neutral carbenes. On the other
hand, the hypothetical anionic Hoveyda–Grubbs-like catalysts
are predicted to less likely undergo degradation in the presence of
the olefin, while being as active as standard, neutral Hoveyda–Grubbs
catalysts.
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Affiliation(s)
- Magdalena Jawiczuk
- Centre of New Technologies, University of Warsaw, Banacha 2c, 02-097 Warszawa, Poland
| | - Anna Marczyk
- Centre of New Technologies, University of Warsaw, Banacha 2c, 02-097 Warszawa, Poland.,Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warszawa, Poland
| | - Katarzyna Młodzikowska-Pieńko
- Centre of New Technologies, University of Warsaw, Banacha 2c, 02-097 Warszawa, Poland.,Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warszawa, Poland
| | - Bartosz Trzaskowski
- Centre of New Technologies, University of Warsaw, Banacha 2c, 02-097 Warszawa, Poland
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12
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Tomás‐Mendivil E, Devillard M, Regnier V, Pecaut J, Martin D. Air‐Stable Oxyallyl Patterns and a Switchable N‐Heterocyclic Carbene. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202002669] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
| | - Marc Devillard
- Univ. Grenoble Alpes CNRS DCM 38000 Grenoble France
- Current address: Université de Rennes CNRS, ISCR, UMR6226 35042 Rennes France
| | | | - Jacques Pecaut
- Univ. Grenoble Alpes, CEA CNRS, INAC-SyMMES, UMR 5819 38000 Grenoble France
| | - David Martin
- Univ. Grenoble Alpes CNRS DCM 38000 Grenoble France
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13
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Tomás-Mendivil E, Devillard M, Regnier V, Pecaut J, Martin D. Air-Stable Oxyallyl Patterns and a Switchable N-Heterocyclic Carbene. Angew Chem Int Ed Engl 2020; 59:11516-11520. [PMID: 32277582 DOI: 10.1002/anie.202002669] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 04/10/2020] [Indexed: 01/22/2023]
Abstract
Oxyallyl derivatives are typically elusive compounds. Even recently reported "stabilized" 1,3-diaminooxyallyl species are still highly reactive and have short lifetimes at room temperature. Herein, we report the synthesis and preliminary study of mesoionic pyrimidine derivatives that feature 1,3-bis(dimethylamino)oxyallyl patterns with an unprecedented level of stabilization. The latter are not only insensitive towards air and moisture, but they are also compatible with the formation of an ancillary stable N-heterocyclic carbene moiety. As the oxyallyl pattern is proton-responsive, it allows the reversible switching of the electronic properties of the carbene, as a ligand.
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Affiliation(s)
| | - Marc Devillard
- Univ. Grenoble Alpes, CNRS, DCM, 38000, Grenoble, France.,Current address: Université de Rennes, CNRS, ISCR, UMR6226, 35042, Rennes, France
| | | | - Jacques Pecaut
- Univ. Grenoble Alpes, CEA, CNRS, INAC-SyMMES, UMR 5819, 38000, Grenoble, France
| | - David Martin
- Univ. Grenoble Alpes, CNRS, DCM, 38000, Grenoble, France
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14
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15
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Wu C, Chen H, Corrigan N, Jung K, Kan X, Li Z, Liu W, Xu J, Boyer C. Computer-Guided Discovery of a pH-Responsive Organic Photocatalyst and Application for pH and Light Dual-Gated Polymerization. J Am Chem Soc 2019; 141:8207-8220. [DOI: 10.1021/jacs.9b01096] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
| | | | | | | | - Xiaonan Kan
- Key Laboratory of Biobased Polymer Materials, Shandong Provincial Education Department, School of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Zhibo Li
- Key Laboratory of Biobased Polymer Materials, Shandong Provincial Education Department, School of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Wenjian Liu
- Qingdao Institute for Theoretical and Computational Sciences, Shandong University, Qingdao 266237, China
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16
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Dorel R, Feringa BL. Photoswitchable catalysis based on the isomerisation of double bonds. Chem Commun (Camb) 2019; 55:6477-6486. [DOI: 10.1039/c9cc01891c] [Citation(s) in RCA: 73] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Photoswitchable catalysis is a young but rapidly evolving field that offers great potential for non-invasive dynamic control of both activity and selectivity in catalysis. This Feature Article summarises the key developments accomplished over the past years through the incorporation of photoswitchable double bonds into the structure of catalytically competent molecules.
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Affiliation(s)
- Ruth Dorel
- Stratingh Institute for Chemistry
- Zernike Institute for Advanced Materials
- University of Groningen
- 9747 AG Groningen
- The Netherlands
| | - Ben L. Feringa
- Stratingh Institute for Chemistry
- Zernike Institute for Advanced Materials
- University of Groningen
- 9747 AG Groningen
- The Netherlands
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17
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Jawiczuk M, Janaszkiewicz A, Trzaskowski B. The influence of the cationic carbenes on the initiation kinetics of ruthenium-based metathesis catalysts; a DFT study. Beilstein J Org Chem 2018; 14:2872-2880. [PMID: 30546471 PMCID: PMC6278762 DOI: 10.3762/bjoc.14.266] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Accepted: 11/01/2018] [Indexed: 11/30/2022] Open
Abstract
Cationic carbenes are a relatively new and rare group of ancillary ligands, which have shown their superior activity in a number of challenging catalytic reactions. In ruthenium-based metathesis catalysis they are often used as ammonium tags, to provide water-soluble, environment-friendly catalysts. In this work we performed computational studies on three cationic carbenes with the formal positive charge located at different distances from the carbene carbon. We show that the predicted initiation rates of Grubbs, indenylidene, and Hoveyda–Grubbs-like complexes incorporating these carbenes show little variance and are similar to initiation rates of standard Grubbs, indenylidene, and Hoveyda–Grubbs catalysts. In all investigated cases the partial charge of the carbene carbon atom is similar, resulting in comparable Ccarbene–Ru bond strengths and Ru–P/O dissociation Gibbs free energies.
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Affiliation(s)
- Magdalena Jawiczuk
- Centre of New Technologies, University of Warsaw, Banacha 2c, 02-097 Warszawa, Poland
| | | | - Bartosz Trzaskowski
- Centre of New Technologies, University of Warsaw, Banacha 2c, 02-097 Warszawa, Poland
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18
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Affiliation(s)
- Changle Chen
- CAS Key Laboratory of Soft Matter Chemistry, iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, People’s Republic of China
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19
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Jana A, Grela K. Forged and fashioned for faithfulness-ruthenium olefin metathesis catalysts bearing ammonium tags. Chem Commun (Camb) 2018; 54:122-139. [PMID: 29188265 DOI: 10.1039/c7cc06535c] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this article, the synthesis and applications of selected ammonium tagged Ru-alkylidene metathesis catalysts were described. Because of the straightforward synthesis, the first generation of onium-tagged catalysts have the ammonium group installed in the benzylidene ligand. Such catalysts usually give relatively pure metathesis products, and are used in polar solvents and water, or immobilised on various supports. Later, catalysts tagged in the N-heterocyclic carbene ligand (NHC) were developed to offer higher stability and even lower metal contamination levels. Due to minimal leaching, the non-dissociating ligand tagged systems were successfully immobilised on various supports, including zeolites and Metal Organic Frameworks (MOFs) and used in batch and in continuous flow conditions.
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Affiliation(s)
- Anupam Jana
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, Żwirki i Wigury 101, 02-089 Warsaw, Poland.
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20
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21
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Walczak A, Stefankiewicz AR. pH-Induced Linkage Isomerism of Pd(II) Complexes: A Pathway to Air- and Water-Stable Suzuki–Miyaura-Reaction Catalysts. Inorg Chem 2017; 57:471-477. [DOI: 10.1021/acs.inorgchem.7b02711] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Anna Walczak
- Department
of Chemistry, Adam Mickiewicz University in Poznań, Umultowska 89b, 61-614 Poznań, Poland
- Centre for Advanced Technologies, Umultowska 89c, 61-614 Poznań, Poland
| | - Artur R. Stefankiewicz
- Department
of Chemistry, Adam Mickiewicz University in Poznań, Umultowska 89b, 61-614 Poznań, Poland
- Centre for Advanced Technologies, Umultowska 89c, 61-614 Poznań, Poland
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22
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Szadkowska A, Zaorska E, Staszko S, Pawłowski R, Trzybiński D, Woźniak K. Synthesis, Structural Characterization and Catalytic Activities of Sulfur-Functionalized NHC-Copper(I) Complexes. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700523] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Anna Szadkowska
- Department of Chemistry; University of Warsaw; Pasteura 1 02-093 Warsaw Poland
- Biological and Chemical Research Centre; University of Warsaw; Zwirki i Wigury 101 02-089 Warsaw Poland
| | - Ewelina Zaorska
- Department of Chemistry; University of Warsaw; Pasteura 1 02-093 Warsaw Poland
| | - Sebastian Staszko
- Department of Chemistry; University of Warsaw; Pasteura 1 02-093 Warsaw Poland
| | - Robert Pawłowski
- Department of Chemistry; University of Warsaw; Pasteura 1 02-093 Warsaw Poland
- Faculty of Chemistry; Warsaw University of Technology; Noakowskiego 3 00-664 Warsaw Poland
| | - Damian Trzybiński
- Department of Chemistry; University of Warsaw; Pasteura 1 02-093 Warsaw Poland
- Biological and Chemical Research Centre; University of Warsaw; Zwirki i Wigury 101 02-089 Warsaw Poland
| | - Krzysztof Woźniak
- Department of Chemistry; University of Warsaw; Pasteura 1 02-093 Warsaw Poland
- Biological and Chemical Research Centre; University of Warsaw; Zwirki i Wigury 101 02-089 Warsaw Poland
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23
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Öztürk BÖ, Kolberg A, Karabulut Şehitoğlu S. Nonaqueous and Aqueous Emulsion ROMP Reactions Induced by Environment-Friendly Latent Ruthenium Indenylidene Catalyst Bearing Morpholine Substituted Bidentate (N, O) Schiff Bases. MACROMOL CHEM PHYS 2017. [DOI: 10.1002/macp.201600594] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Adrianna Kolberg
- Institut für Anorganische und Analytische Chemie; Albert-Ludwigs-Universität Freiburg; Albertstraße 21 79104 Freiburg Germany
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24
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Abstract
It is well-recognized that N-heterocyclic carbene (NHC) ligands have provided a new dimension to the design of homogeneous catalysts. Part of the success of this type of ligands resides in the limitless access to a variety of topologies with tuned electronic properties, but also in the ability of a family of NHCs that are able to adapt their properties to the specific requirements of individual catalytic transformations. The term "smart" is used here to refer to switchable, multifunctional, adaptable, or tunable ligands and, in general, to all those ligands that are able to modify their steric or electronic properties to fulfill the requirements of a defined catalytic reaction. The purpose of this review is to comprehensively describe all types of smart NHC ligands by focusing attention on the catalytically relevant ligand-based reactivity.
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Affiliation(s)
- Eduardo Peris
- Institute of Advanced Materials , Universitat Jaume I , Avenida Vicente Sos Baynat s/n , Castellón E-12071 , Spain
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25
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Tuning the molecular weight of ROMP polymers by using Grubbs type catalysts and terminal alkynes. J Organomet Chem 2016. [DOI: 10.1016/j.jorganchem.2016.08.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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26
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27
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Szadkowska A, Staszko S, Zaorska E, Pawłowski R. A theophylline based copper N-heterocyclic carbene complex: synthesis and activity studies in green media. RSC Adv 2016. [DOI: 10.1039/c6ra06682h] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The synthesis of an easily accessible theophylline-derived copper complex with additional ammonium functionalization has been developed.
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Affiliation(s)
- Anna Szadkowska
- Department of Chemistry
- University of Warsaw
- 02-093 Warsaw
- Poland
| | - Sebastian Staszko
- Department of Chemistry
- University of Warsaw
- 02-093 Warsaw
- Poland
- Faculty of Advanced Technologies and Chemistry
| | - Ewelina Zaorska
- Department of Chemistry
- University of Warsaw
- 02-093 Warsaw
- Poland
| | - Robert Pawłowski
- Department of Chemistry
- University of Warsaw
- 02-093 Warsaw
- Poland
- Faculty of Chemistry
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28
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Koy M, Altmann HJ, Autenrieth B, Frey W, Buchmeiser MR. Grubbs-Hoveyda type catalysts bearing a dicationic N-heterocyclic carbene for biphasic olefin metathesis reactions in ionic liquids. Beilstein J Org Chem 2015; 11:1632-8. [PMID: 26664582 PMCID: PMC4660883 DOI: 10.3762/bjoc.11.178] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2015] [Accepted: 08/25/2015] [Indexed: 12/01/2022] Open
Abstract
The novel dicationic metathesis catalyst [(RuCl2(H2ITapMe2)(=CH–2-(2-PrO)-C6H4))2+ (OTf−)2] (Ru-2, H2ITapMe2 = 1,3-bis(2’,6’-dimethyl-4’-trimethylammoniumphenyl)-4,5-dihydroimidazol-2-ylidene, OTf− = CF3SO3−) based on a dicationic N-heterocyclic carbene (NHC) ligand was prepared. The reactivity was tested in ring opening metathesis polymerization (ROMP) under biphasic conditions using a nonpolar organic solvent (toluene) and the ionic liquid (IL) 1-butyl-2,3-dimethylimidazolium tetrafluoroborate [BDMIM+][BF4−]. The structure of Ru-2 was confirmed by single crystal X-ray analysis.
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Affiliation(s)
- Maximilian Koy
- Lehrstuhl für Makromolekulare Stoffe und Faserchemie, Institut für Polymerchemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
| | - Hagen J Altmann
- Lehrstuhl für Makromolekulare Stoffe und Faserchemie, Institut für Polymerchemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
| | - Benjamin Autenrieth
- Lehrstuhl für Makromolekulare Stoffe und Faserchemie, Institut für Polymerchemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
| | - Wolfgang Frey
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
| | - Michael R Buchmeiser
- Lehrstuhl für Makromolekulare Stoffe und Faserchemie, Institut für Polymerchemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany, ; Institut für Textilchemie und Chemiefaser (ITCF) Denkendorf, Körschtalstr. 26, D-73770 Denkendorf, Germany
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29
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Balof SL, Nix KO, Olliff MS, Roessler SE, Saha A, Müller KB, Behrens U, Valente EJ, Schanz HJ. Hexacoordinate Ru-based olefin metathesis catalysts with pH-responsive N-heterocyclic carbene (NHC) and N-donor ligands for ROMP reactions in non-aqueous, aqueous and emulsion conditions. Beilstein J Org Chem 2015; 11:1960-72. [PMID: 26664616 PMCID: PMC4660970 DOI: 10.3762/bjoc.11.212] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Accepted: 09/24/2015] [Indexed: 11/23/2022] Open
Abstract
Three new ruthenium alkylidene complexes (PCy3)Cl2(H2ITap)Ru=CHSPh (9), (DMAP)2Cl2(H2ITap)Ru=CHPh (11) and (DMAP)2Cl2(H2ITap)Ru=CHSPh (12) have been synthesized bearing the pH-responsive H2ITap ligand (H2ITap = 1,3-bis(2’,6’-dimethyl-4’-dimethylaminophenyl)-4,5-dihydroimidazol-2-ylidene). Catalysts 11 and 12 are additionally ligated by two pH-responsive DMAP ligands. The crystal structure was solved for complex 12 by X-ray diffraction. In organic, neutral solution, the catalysts are capable of performing standard ring-opening metathesis polymerization (ROMP) and ring closing metathesis (RCM) reactions with standard substrates. The ROMP with complex 11 is accelerated in the presence of two equiv of H3PO4, but is reduced as soon as the acid amount increased. The metathesis of phenylthiomethylidene catalysts 9 and 12 is sluggish at room temperature, but their ROMP can be dramatically accelerated at 60 °C. Complexes 11 and 12 are soluble in aqueous acid. They display the ability to perform RCM of diallylmalonic acid (DAMA), however, their conversions are very low amounting only to few turnovers before decomposition. However, both catalysts exhibit outstanding performance in the ROMP of dicyclopentadiene (DCPD) and mixtures of DCPD with cyclooctene (COE) in acidic aqueous microemulsion. With loadings as low as 180 ppm, the catalysts afforded mostly quantitative conversions of these monomers while maintaining the size and shape of the droplets throughout the polymerization process. Furthermore, the coagulate content for all experiments stayed <2%. This represents an unprecedented efficiency in emulsion ROMP based on hydrophilic ruthenium alkylidene complexes.
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Affiliation(s)
- Shawna L Balof
- Department of Chemistry & Biochemistry, The University of Southern Mississippi, 118 College Drive, Hattiesburg, MS 39406-5043, USA
| | - K Owen Nix
- Department of Chemistry, Georgia Southern University, 521 College of Education Drive, Statesboro, GA 30458-8064, USA
| | - Matthew S Olliff
- Department of Chemistry, Georgia Southern University, 521 College of Education Drive, Statesboro, GA 30458-8064, USA
| | - Sarah E Roessler
- Department of Chemistry, Georgia Southern University, 521 College of Education Drive, Statesboro, GA 30458-8064, USA
| | - Arpita Saha
- Department of Chemistry, Georgia Southern University, 521 College of Education Drive, Statesboro, GA 30458-8064, USA
| | | | - Ulrich Behrens
- BASF SE, Basic Chemicals Research, GCB/C - M313, 67056 Ludwigshafen, Germany
| | - Edward J Valente
- Department of Chemistry, University of Portland, 5000 N. Willamette Blvd., Portland, OR 97203, USA
| | - Hans-Jörg Schanz
- Department of Chemistry, Georgia Southern University, 521 College of Education Drive, Statesboro, GA 30458-8064, USA
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30
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Belger K, Krause N. Smaller, faster, better: modular synthesis of unsymmetrical ammonium salt-tagged NHC-gold(I) complexes and their application as recyclable catalysts in water. Org Biomol Chem 2015; 13:8556-60. [PMID: 26175224 DOI: 10.1039/c5ob01286d] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Facile access towards a small library of unsymmetrical ammonium salt-tagged N-heterocyclic carbene gold(i) complexes is described, and their application as recyclable catalysts in cyclization reactions of acetylenic carboxylic acids and amides to lactones and lactams, respectively, in aqueous media is demonstrated. Catalyst was applied in the synthesis of 2-epi-clausemarine A ().
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Affiliation(s)
- Katrin Belger
- Organic Chemistry, Dortmund University of Technology, Otto-Hahn-Str. 6, D-44227 Dortmund, Germany.
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31
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Skowerski K, Pastva J, Czarnocki SJ, Janoscova J. Exceptionally Stable and Efficient Solid Supported Hoveyda-Type Catalyst. Org Process Res Dev 2015. [DOI: 10.1021/acs.oprd.5b00132] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - Jakub Pastva
- Apeiron Synthesis
SA, Duńska 9, 54-427 Wrocław, Poland
| | | | - Jana Janoscova
- J.
Heyrovský Institute of Physical Chemistry, Department of Structure
and Dynamics in Catalysis, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 3, 182 23 Prague 8, Czech Republic
- Czech Republic and University of Pardubice, Department of Inorganic Technology, Doubravice 41, 532
10 Pardubice, Czech Republic
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32
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Abstract
Catalysis is key to the effective and efficient transformation of readily available building blocks into high value functional molecules and materials. For many years research in this field has largely focussed on the invention of new catalysts and the optimization of their performance to achieve high conversions and/or selectivities. However, inspired by Nature, chemists are beginning to turn their attention to the development of catalysts whose activity in different chemical processes can be switched by an external stimulus. Potential applications include using the states of multiple switchable catalysts to control sequences of transformations, producing different products from a pool of building blocks according to the order and type of stimuli applied. Here we outline the state-of-art in artificial switchable catalysis, classifying systems according to the trigger used to achieve control over the catalytic activity and stereochemical or other structural outcomes of the reaction.
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Affiliation(s)
- Victor Blanco
- School of Chemistry, University of Manchester, Oxford Road, Manchester, M13 9PL, UK.
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33
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Levin E, Ivry E, Diesendruck CE, Lemcoff NG. Water in N-heterocyclic carbene-assisted catalysis. Chem Rev 2015; 115:4607-92. [PMID: 25942582 DOI: 10.1021/cr400640e] [Citation(s) in RCA: 182] [Impact Index Per Article: 20.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Efrat Levin
- †Chemistry Department, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Elisa Ivry
- †Chemistry Department, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Charles E Diesendruck
- ‡Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa 32000, Israel
| | - N Gabriel Lemcoff
- †Chemistry Department, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
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34
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35
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Belger K, Krause N. Ammonium-Salt-Tagged IMesAuCl Complexes and Their Application in Gold-Catalyzed Cycloisomerization Reactions in Water. European J Org Chem 2014. [DOI: 10.1002/ejoc.201403153] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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36
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Gupta SK, Ghorai D, Choudhury J. A New Type of Palladium-Pincer Complexes Generated via Hydrolytic Ring-Opening of Imidazole-2-ylidenes. Organometallics 2014. [DOI: 10.1021/om500362x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Suraj K. Gupta
- Organometallics & Smart Materials Laboratory, Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Indore By-pass Road, Bhopal 462 066, India
| | - Debasish Ghorai
- Organometallics & Smart Materials Laboratory, Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Indore By-pass Road, Bhopal 462 066, India
| | - Joyanta Choudhury
- Organometallics & Smart Materials Laboratory, Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Indore By-pass Road, Bhopal 462 066, India
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37
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Osorio-Planes L, Rodríguez-Escrich C, Pericàs MA. Photoswitchable Thioureas for the External Manipulation of Catalytic Activity. Org Lett 2014; 16:1704-7. [DOI: 10.1021/ol500381c] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Laura Osorio-Planes
- Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans, 16, E-43007 Tarragona, Spain
- Departament de Química
Orgànica, Universitat de Barcelona, UB E-08028, Barcelona, Spain
| | - Carles Rodríguez-Escrich
- Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans, 16, E-43007 Tarragona, Spain
- Departament de Química
Orgànica, Universitat de Barcelona, UB E-08028, Barcelona, Spain
| | - Miquel A. Pericàs
- Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans, 16, E-43007 Tarragona, Spain
- Departament de Química
Orgànica, Universitat de Barcelona, UB E-08028, Barcelona, Spain
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38
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Zhan P, Wang J, Wang ZG, Ding B. Engineering the pH-responsive catalytic behavior of AuNPs by DNA. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2014; 10:399-406. [PMID: 24039035 DOI: 10.1002/smll.201301931] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2013] [Revised: 07/22/2013] [Indexed: 06/02/2023]
Abstract
Noble metal nanoparticles have attracted much interest in the heterogeneous catalysis. Particularly, efficient manipulation of the responsive catalytic properties of the metal nanoparticles is an interesting topic. In this work, a simple and efficient strategy is developed to regulate the pH-responsive catalytic activities of glucose oxidase (GOx)-mimicking gold nanoparticles (AuNPs). Four DNA strands (regulating strands) that differ slightly in sequences are used to interact non-covalently with citrate-capped AuNPs, resulting in markedly distinct pH-dependent catalytic behavior of AuNPs. This is ascribed to the characteristic pH-induced conformational change of the DNA strands that leads to the different adsorption capability to the NPs surface, as demonstrated by pH-CD profiles of the respective DNA molecules. The pH-dependent catalysis of AuNPs is also encoded with structural information of the double-stranded DNA (including regulating strands and their complementary strands) that has conformation resistant or responsive to pH change. As a result, the catalysis can be programmed into an AND gate, a XNOR gate or a NOT gate, using pH and complementary strand as the inputs, the nanoparticle activity as the output and the regulating strands as the programs. This work can be expanded by engineering the catalytic behavior of noble metal nanoparticles to respond smartly to a variety of environmental stimuli, such as metal ions or light wavelengths. These results may provide insight into understanding ligand-regulated nanometallic catalysis.
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Affiliation(s)
- Pengfei Zhan
- National Center for Nanoscience and Technology, Beijing, 100190, PR China
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39
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Lefebvre JF, Lo M, Gisselbrecht JP, Coulembier O, Clément S, Richeter S. Porphyrins Fused to N-Heterocyclic Carbenes (NHCs): Modulation of the Electronic and Catalytic Properties of NHCs by the Central Metal of the Porphyrin. Chemistry 2013; 19:15652-60. [DOI: 10.1002/chem.201301483] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2013] [Revised: 07/30/2013] [Indexed: 12/14/2022]
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40
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In situ modification of the Grubbs first generation catalyst: A highly controllable metathesis catalyst bearing tridentate Schiff base ligands. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.molcata.2013.04.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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41
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Affiliation(s)
- Bethany M. Neilson
- Department of Chemistry
and Biochemistry, The University of Texas at Austin, Austin, Texas 78712,
United States
| | - Christopher W. Bielawski
- Department of Chemistry
and Biochemistry, The University of Texas at Austin, Austin, Texas 78712,
United States
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42
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Nasser G, Renouard T, Shahane S, Fischmeister C, Bruneau C, Rabiller-Baudry M. Interest of the Precatalyst Design for Olefin Metathesis Operating in a Discontinuous Nanofiltration Membrane Reactor. Chempluschem 2013; 78:728-736. [DOI: 10.1002/cplu.201300112] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2013] [Revised: 04/30/2013] [Indexed: 11/08/2022]
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43
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Neilson BM, Bielawski CW. Photoswitchable Metal-Mediated Catalysis: Remotely Tuned Alkene and Alkyne Hydroborations. Organometallics 2013. [DOI: 10.1021/om400348h] [Citation(s) in RCA: 80] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Bethany M. Neilson
- Department of Chemistry
and Biochemistry, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Christopher W. Bielawski
- Department of Chemistry
and Biochemistry, The University of Texas at Austin, Austin, Texas 78712, United States
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44
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Kajetanowicz A, Czaban J, Krishnan GR, Malińska M, Woźniak K, Siddique H, Peeva LG, Livingston AG, Grela K. Batchwise and continuous nanofiltration of POSS-tagged Grubbs-Hoveyda-type olefin metathesis catalysts. CHEMSUSCHEM 2013; 6:182-92. [PMID: 23086741 DOI: 10.1002/cssc.201200466] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2012] [Indexed: 05/11/2023]
Abstract
New molecular-weight-enlarged metathesis catalysts, which bear polyhedral oligomeric silsesquioxane (POSS) tags, were synthesized and characterized. The catalysts can be recovered from the reaction mixture by using nanofiltration techniques and can be reused. It was found that the membranes Starmem 228 and PuraMem 280 successfully separate the catalyst from the post-reaction mixtures to below 3 ppm. The application of these POSS-tagged catalysts in a continuous metathesis reaction was also investigated.
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Affiliation(s)
- Anna Kajetanowicz
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
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45
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Schaper LA, Hock SJ, Herrmann WA, Kühn FE. Synthesis and Application of Water-Soluble NHC Transition-Metal Complexes. Angew Chem Int Ed Engl 2012; 52:270-89. [DOI: 10.1002/anie.201205119] [Citation(s) in RCA: 281] [Impact Index Per Article: 23.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2012] [Indexed: 11/10/2022]
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46
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Schaper LA, Hock SJ, Herrmann WA, Kühn FE. Synthese und Anwendung wasserlöslicher NHC-Übergangsmetall-Komplexe. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201205119] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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47
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Shahane S, Toupet L, Fischmeister C, Bruneau C. Synthesis and Characterization of Sterically Enlarged Hoveyda-Type Olefin Metathesis Catalysts. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200966] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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48
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Cabrera J, Padilla R, Bru M, Lindner R, Kageyama T, Wilckens K, Balof SL, Schanz HJ, Dehn R, Teles JH, Deuerlein S, Müller K, Rominger F, Limbach M. Linker-free, silica-bound olefin-metathesis catalysts: applications in heterogeneous catalysis. Chemistry 2012; 18:14717-24. [PMID: 23019012 DOI: 10.1002/chem.201202248] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2012] [Indexed: 11/08/2022]
Abstract
A set of heterogenized olefin-metathesis catalysts, which consisted of Ru complexes with the H(2)ITap ligand (1,3-bis(2',6'-dimethyl-4'dimethyl aminophenyl)-4,5-dihydroimidazol-2-ylidene) that had been adsorbed onto a silica support, has been prepared. These complexes showed strong binding to the solid support without the need for tethering groups on the complex or functionalized silica. The catalysts were tested in the ring-opening-ring-closing-metathesis (RO-RCM) of cyclooctene (COE) and the self-metathesis of methyl oleate under continuous-flow conditions. The best complexes showed a TON>4000, which surpasses the previously reported materials that were either based on the Grubbs-Hoveyda II complex on silica or on the classical heterogeneous Re(2)O(7)/B(2)O(3) catalyst.
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Affiliation(s)
- José Cabrera
- Catalysis Research Laboratory, Heidelberg, Germany
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49
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Neilson BM, Bielawski CW. Photoswitchable Organocatalysis: Using Light To Modulate the Catalytic Activities of N-Heterocyclic Carbenes. J Am Chem Soc 2012; 134:12693-9. [DOI: 10.1021/ja304067k] [Citation(s) in RCA: 155] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Bethany M. Neilson
- Department of Chemistry
and Biochemistry, The University of Texas, Austin, Texas 78712, United
States
| | - Christopher W. Bielawski
- Department of Chemistry
and Biochemistry, The University of Texas, Austin, Texas 78712, United
States
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50
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Silbestri GF, Flores JC, de Jesús E. Water-Soluble N-Heterocyclic Carbene Platinum(0) Complexes: Recyclable Catalysts for the Hydrosilylation of Alkynes in Water at Room Temperature. Organometallics 2012. [DOI: 10.1021/om300148q] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Gustavo F. Silbestri
- Departamento de Química Inorgánica,
Campus
Universitario, Universidad de Alcalá, 28871 Alcalá de Henares, Madrid, Spain
| | - Juan Carlos Flores
- Departamento de Química Inorgánica,
Campus
Universitario, Universidad de Alcalá, 28871 Alcalá de Henares, Madrid, Spain
| | - Ernesto de Jesús
- Departamento de Química Inorgánica,
Campus
Universitario, Universidad de Alcalá, 28871 Alcalá de Henares, Madrid, Spain
| |
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