1
|
Ma L, Gong W, Wu Q, Zhou X, Zhao S, Khan A, Li X, Xu A. Permanganate activation with Mn oxides at different oxidation states: Insight into the surface-promoted electron transfer mechanism. JOURNAL OF HAZARDOUS MATERIALS 2023; 457:131746. [PMID: 37270959 DOI: 10.1016/j.jhazmat.2023.131746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 05/26/2023] [Accepted: 05/29/2023] [Indexed: 06/06/2023]
Abstract
The development of new strategies to improve the removal of organic pollutants with permanganate (KMnO4) is a hot topic in water treatment. While Mn oxides have been extensively used in Advanced Oxidation Processes through an electron transfer mechanism, the field of KMnO4 activation remains relatively unexplored. Interestingly, this study has discovered that Mn oxides with high oxidation states including γ-MnOOH, α-Mn2O3 and α-MnO2, exhibited excellent performance to degrade phenols and antibiotics in the presence of KMnO4. The MnO4- species initially formed stable complexes with the surface Mn(III/IV) species and showed an increased oxidation potential and electron transfer reactivity, caused by the electron-withdrawing capacity of the Mn species acting as Lewis acids. Conversely, for MnO and γ-Mn3O4 with Mn(II) species, they reacted with KMnO4 to produce cMnO2 with very low activity for phenol degradation. The direct electron transfer mechanism in α-MnO2/KMnO4 system was further confirmed through the inhibiting effect of acetonitrile and the galvanic oxidation process. Moreover, the adaptability and reusability of α-MnO2 in complicated waters indicated its potential for application in water treatment. Overall, the findings shed light on the development of Mn-based catalysts for organic pollutants degradation via KMnO4 activation and understanding of the surface-promoted mechanism.
Collapse
Affiliation(s)
- Lu Ma
- School of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430200, PR China; Hubei Key Laboratory of Biomass Fibers and Eco-Dyeing & Finishing, Wuhan Textile University, Wuhan 430200, PR China
| | - Wenqiang Gong
- School of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430200, PR China
| | - Qinghong Wu
- School of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430200, PR China
| | - Xiong Zhou
- School of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430200, PR China
| | - Shuaiqi Zhao
- School of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430200, PR China
| | - Aimal Khan
- School of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430200, PR China
| | - Xiaoxia Li
- School of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430200, PR China
| | - Aihua Xu
- School of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430200, PR China; Hubei Key Laboratory of Biomass Fibers and Eco-Dyeing & Finishing, Wuhan Textile University, Wuhan 430200, PR China.
| |
Collapse
|
2
|
Sun D, Wu Z, Zhang X, Yang J, Zhao Y, Nam W, Wang Y. Brønsted Acids Promote Olefin Oxidations by Bioinspired Nonheme Co III(PhIO)(OH) Complexes: A Role for Low-Barrier Hydrogen Bonds. J Am Chem Soc 2023; 145:5739-5749. [PMID: 36867878 DOI: 10.1021/jacs.2c12307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2023]
Abstract
Introduction of Brønsted acids into biomimetic nonheme reactions promotes the oxidative ability of metal-oxygen complexes significantly. However, the molecular machinery of the promoted effects is missing. Herein, a comprehensive investigation of styrene oxidation by a cobalt(III)-iodosylbenzene complex, [(TQA)CoIII(OIPh)(OH)]2+ (1, TQA = tris(2-quinolylmethyl)amine), in the presence and absence of triflic acid (HOTf) was performed using density functional theory calculations. Results revealed for the first time that there is a low-barrier hydrogen bond (LBHB) between HOTf and the hydroxyl ligand of 1, which forms two valence-resonance structures [(TQA)CoIII(OIPh)(HO---HOTf)]2+ (1LBHB) and [(TQA)CoIII(OIPh)(H2O--OTf-)]2+ (1'LBHB). Due to the oxo-wall, these complexes (1LBHB and 1'LBHB) cannot convert to high-valent cobalt-oxyl species. Instead, styrene oxidation by these oxidants (1LBHB and 1'LBHB) shows novel spin-state selectivity, i.e., on the ground closed-shell singlet state, styrene is oxidized to an epoxide, whereas on the excited triplet and quintet states, an aldehyde product, phenylacetaldehyde, is formed. The preferred pathway is styrene oxidation by 1'LBHB, which is initiated by a rate-limiting bond-formation-coupled electron transfer process with an energy barrier of 12.2 kcal mol-1. The nascent PhIO-styrene-radical-cation intermediate undergoes an intramolecular rearrangement to produce an aldehyde. The halogen bond between the OH-/H2O ligand and the iodine of PhIO modulates the activity of the cobalt-iodosylarene complexes 1LBHB and 1'LBHB. These new mechanistic findings enrich our knowledge of nonheme chemistry and hypervalent iodine chemistry and will play a positive role in the rational design of new catalysts.
Collapse
Affiliation(s)
- Dongru Sun
- Institute of Drug Discovery Technology, Ningbo University, Ningbo 315211, China.,Qian Xuesen Collaborative Research Center of Astrochemistry and Space Life Sciences, Ningbo University, Ningbo 315211, China
| | - Zhimin Wu
- Institute of Drug Discovery Technology, Ningbo University, Ningbo 315211, China.,Qian Xuesen Collaborative Research Center of Astrochemistry and Space Life Sciences, Ningbo University, Ningbo 315211, China
| | - Xuan Zhang
- Institute of Drug Discovery Technology, Ningbo University, Ningbo 315211, China.,Qian Xuesen Collaborative Research Center of Astrochemistry and Space Life Sciences, Ningbo University, Ningbo 315211, China
| | - Jindou Yang
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea
| | - Yufen Zhao
- Institute of Drug Discovery Technology, Ningbo University, Ningbo 315211, China.,Qian Xuesen Collaborative Research Center of Astrochemistry and Space Life Sciences, Ningbo University, Ningbo 315211, China
| | - Wonwoo Nam
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea.,School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China
| | - Yong Wang
- Institute of Drug Discovery Technology, Ningbo University, Ningbo 315211, China.,Qian Xuesen Collaborative Research Center of Astrochemistry and Space Life Sciences, Ningbo University, Ningbo 315211, China
| |
Collapse
|
3
|
Zhang J, Lee YM, Seo MS, Nilajakar M, Fukuzumi S, Nam W. A Contrasting Effect of Acid in Electron Transfer, Oxygen Atom Transfer, and Hydrogen Atom Transfer Reactions of a Nickel(III) Complex. Inorg Chem 2022; 61:19735-19747. [PMID: 36445726 DOI: 10.1021/acs.inorgchem.2c02504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
There have been many examples of the accelerating effects of acids in electron transfer (ET), oxygen atom transfer (OAT), and hydrogen atom transfer (HAT) reactions. Herein, we report a contrasting effect of acids in the ET, OAT, and HAT reactions of a nickel(III) complex, [NiIII(PaPy3*)]2+ (1) in acetone/CH3CN (v/v 19:1). 1 was synthesized by reacting [NiII(PaPy3*)]+ (2) with magic blue or iodosylbenzene in the absence or presence of triflic acid (HOTf), respectively. Sulfoxidation of thioanisole by 1 and H2O occurred in the presence of HOTf, and the reaction rate increased proportionally with increasing concentration of HOTf ([HOTf]). The rate of ET from diacetylferrocene to 1 also increased linearly with increasing [HOTf]. In contrast, HAT from 9,10-dihydroanthracene (DHA) to 1 slowed down with increasing [HOTf], exhibiting an inversely proportional relation to [HOTf]. The accelerating effect of HOTf in the ET and OAT reactions was ascribed to the binding of H+ to the PaPy3* ligand of 2; the one-electron reduction potential (Ered) of 1 was positively shifted with increasing [HOTf]. Such a positive shift in the Ered value resulted in accelerating the ET and OAT reactions that proceeded via the rate-determining ET step. On the other hand, the decelerating effect of HOTf on HAT from DHA to 1 resulted from the inhibition of proton transfer from DHA•+ to 2 due to the binding of H+ to the PaPy3* ligand of 2. The ET reactions of 1 in the absence and presence of HOTf were well analyzed in light of the Marcus theory of ET in comparison with the HAT reactions.
Collapse
Affiliation(s)
- Jisheng Zhang
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea
| | - Yong-Min Lee
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea
| | - Mi Sook Seo
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea
| | - Madhuri Nilajakar
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea
| | - Shunichi Fukuzumi
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea
| | - Wonwoo Nam
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea
| |
Collapse
|
4
|
Liao G, Mei F, Chen Z, Yin G. Lewis acid improved dioxygen activation by a non-heme iron(II) complex towards tryptophan 2,3-dioxygenase activity for olefin oxygenation. Dalton Trans 2022; 51:18024-18032. [PMID: 36373374 DOI: 10.1039/d2dt02769k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Dioxygen activation and catalysis around ambient temperature is a long-standing challenge in chemistry. Inspired by the significant roles of the hydrogen bond network in dioxygen activation and catalysis by redox enzymes, this work presents a Lewis acid improved dioxygen activation by an FeII(BPMEN)(OTf)2 complex towards tryptophan 2,3-dioxygenase (TDO) activity for 3-methylindole and common olefinic CC bond oxygenation and cleavage (enzymatic Brønsted acid vs. chemical Lewis acid). It was found that the presence of a Lewis acid such as Sc3+ could substantially improve olefinic CC bond oxygenation and cleavage activity through FeII(BPMEN)(OTf)2 catalyzed dioxygen activation. Notably, a more negative ρ value in the Hammett plot of para-substituted styrene oxygenations was observed in the presence of a stronger Lewis acid, disclosing the enhanced electrophilic oxygenation capability of the putative iron(III) superoxo species through its electrostatic interaction with a stronger Lewis acid. Thereof, this work has demonstrated a new strategy in catalyst design for dioxygen activation and catalysis for olefin oxygenation, a significant process in the chemical industry.
Collapse
Affiliation(s)
- Guangjian Liao
- School of Chemistry and Chemical Engineering, Key laboratory of Material Chemistry for Energy Conversion and Storage (Huazhong University of Science and Technology), Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, Huazhong University of Science and Technology, Wuhan 430074, PR China.
| | - Fuming Mei
- School of Chemistry and Chemical Engineering, Key laboratory of Material Chemistry for Energy Conversion and Storage (Huazhong University of Science and Technology), Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, Huazhong University of Science and Technology, Wuhan 430074, PR China.
| | - Zhuqi Chen
- School of Chemistry and Chemical Engineering, Key laboratory of Material Chemistry for Energy Conversion and Storage (Huazhong University of Science and Technology), Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, Huazhong University of Science and Technology, Wuhan 430074, PR China.
| | - Guochuan Yin
- School of Chemistry and Chemical Engineering, Key laboratory of Material Chemistry for Energy Conversion and Storage (Huazhong University of Science and Technology), Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, Huazhong University of Science and Technology, Wuhan 430074, PR China.
| |
Collapse
|
5
|
Teptarakulkarn P, Lorpaiboon W, Anusanti T, Laowiwatkasem N, Chainok K, Sangtrirutnugul P, Surawatanawong P, Chantarojsiri T. Incorporation of Cation Affects the Redox Reactivity of Fe- NNN Complexes on C-H Oxidation. Inorg Chem 2022; 61:11066-11074. [PMID: 35815773 DOI: 10.1021/acs.inorgchem.2c00762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Cations such as Lewis acids have been shown to enhance the catalytic activity of high-valent Fe-oxygen intermediates. Herein, we present a pyridine diamine ethylene glycol macrocycle, which can form Zn(II)- or Fe(III)-complex with the NNN site, while allowing redox-inactive cations to bind to the ethylene glycol moiety. The addition of alkali, alkali earth, and lanthanum ions resulted in positive shifts to the Fe(III/II) redox potential. Calculation of dissociation constants showed the tightest binding with a Ba2+ ion. Density functional theory calculations were used to elucidate the effects of redox inactive cations toward the electronic structures of Fe complexes. Although the Fe-NNN complexes, both in the absence and presence of cations, can catalyze C-H oxidation of 9,10-dihydroanthracene, to give anthracene [hydrogen atom transfer (HAT) product], anthrone, and anthraquinone [oxygen atom transfer (OAT) products], highest overall activity and OAT/HAT product ratios were obtained in the presence of dications, that is, Ba2+ and Mg2+, respectively.
Collapse
Affiliation(s)
- Pathorn Teptarakulkarn
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Wanutcha Lorpaiboon
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Thana Anusanti
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Natchapol Laowiwatkasem
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Kittipong Chainok
- Thammasat University Research Unit in Multifunctional Crystalline Materials and Applications (TU-MCMA), Faculty of Science and Technology, Thammasat University, Pathum Thani 12121, Thailand
| | - Preeyanuch Sangtrirutnugul
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Panida Surawatanawong
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| | - Teera Chantarojsiri
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand
| |
Collapse
|
6
|
Zhang J, Lee YM, Seo MS, Fukuzumi S, Nam W. Acid Catalysis in the Oxidation of Substrates by Mononuclear Manganese(III)-Aqua Complexes. Inorg Chem 2022; 61:6594-6603. [PMID: 35442673 DOI: 10.1021/acs.inorgchem.2c00430] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Acids are known to enhance the reactivities of metal-oxygen intermediates, such as metal-oxo, -hydroperoxo, -peroxo, and -superoxo complexes, in biomimetic oxidation reactions. Although metal-aqua (and metal-hydroxo) complexes have been shown to be potent oxidants in oxidation reactions, acid effects on the reactivities of metal-aqua complexes have never been investigated previously. In this study, a mononuclear manganese(III)-aqua complex, [(dpaq5NO2)MnIII(OH2)]2+ (1; dpaq5NO2 = 2-[bis(pyridin-2-ylmethyl)]amino-N-quinolin-8-ylacetamidate with an NO2 substituent at the 5 position), which is relatively stable in the presence of triflic acid (HOTf), is used in the investigation of acid-catalyzed oxidation reactions by metal-aqua complexes. As a result, we report a remarkable acid catalysis in the six-electron oxidation of anthracene by 1 in the presence of HOTf; anthraquinone is formed as the product. In the HOTf-catalyzed six-electron oxidation of anthracene by 1, the rate constant increases linearly with an increase of the HOTf concentration. Combined with the observed one-electron oxidation product, anthracene (derivative) radical cation, and the substitution effect at the 5 position of the dpaq ligand in 1 on the rate constants of the oxidation of anthracene, it is concluded that the oxidation of anthracene occurs via an acid-promoted electron transfer (APET) from anthracene to 1. The dependence of the rate constants of the APET from electron donors, including anthracene derivatives, to 1 on the driving force of electron transfer is also shown to be well fitted by the Marcus equation of outer-sphere electron transfer. To the best of our knowledge, this is the first example showing acid catalysis in the oxidation of substrates by metal(III)-aqua complexes.
Collapse
Affiliation(s)
- Jisheng Zhang
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul 03760, Korea
| | - Yong-Min Lee
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul 03760, Korea
| | - Mi Sook Seo
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul 03760, Korea
| | - Shunichi Fukuzumi
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul 03760, Korea.,Faculty of Science and Engineering, Meijo University, Nagoya, Aichi 468-8502, Japan
| | - Wonwoo Nam
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul 03760, Korea.,Institute of Drug Discovery Technology, Ningbo University, Ningbo 315211, China
| |
Collapse
|
7
|
Extraction, antioxidant, and anticancer activity of saponins extracted from Curcuma angustifolia. APPLIED NANOSCIENCE 2022. [DOI: 10.1007/s13204-021-02096-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
8
|
Karmalkar DG, Seo MS, Lee YM, Kim Y, Lee E, Sarangi R, Fukuzumi S, Nam W. Deeper Understanding of Mononuclear Manganese(IV)-Oxo Binding Brønsted and Lewis Acids and the Manganese(IV)-Hydroxide Complex. Inorg Chem 2021; 60:16996-17007. [PMID: 34705465 DOI: 10.1021/acs.inorgchem.1c02119] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Binding of Lewis acidic metal ions and Brønsted acid at the metal-oxo group of high-valent metal-oxo complexes enhances their reactivities significantly in oxidation reactions. However, such a binding of Lewis acids and proton at the metal-oxo group has been questioned in several cases and remains to be clarified. Herein, we report the synthesis, characterization, and reactivity studies of a mononuclear manganese(IV)-oxo complex binding triflic acid, {[(dpaq)MnIV(O)]-HOTf}+ (1-HOTf). First, 1-HOTf was synthesized and characterized using various spectroscopic techniques, including resonance Raman (rRaman) and X-ray absorption spectroscopy/extended X-ray absorption fine structure. In particular, in rRaman experiments, we observed a linear correlation between the Mn-O stretching frequencies of 1-HOTf (e.g., νMn-O at ∼793 cm-1) and 1-Mn+ (Mn+ = Ca2+, Zn2+, Lu3+, Al3+, or Sc3+) and the Lewis acidities of H+ and Mn+ ions, suggesting that H+ and Mn+ bind at the metal-oxo moiety of [(dpaq)MnIV(O)]+. Interestingly, a single-crystal structure of 1-HOTf was obtained by X-ray diffraction analysis, but the structure was not an expected Mn(IV)-oxo complex but a Mn(IV)-hydroxide complex, [(dpaq)MnIV(OH)](OTf)2 (4), with a Mn-O bond distance of 1.8043(19) Å and a Mn-O stretch at 660 cm-1. More interestingly, 4 reverted to 1-HOTf upon dissolution, demonstrating that 1-HOTf and 4 are interconvertible depending on the physical states, such as 1-HOTf in solution and 4 in isolated solid. The reactivity of 1-HOTf was investigated in hydrogen atom transfer (HAT) and oxygen atom transfer (OAT) reactions and then compared with those of 1-Mn+ complexes; an interesting correlation between the Mn-O stretching frequencies of 1-HOTf and 1-Mn+ and their reactivities in the OAT and HAT reactions is reported for the first time in this study.
Collapse
Affiliation(s)
- Deepika G Karmalkar
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea
| | - Mi Sook Seo
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea
| | - Yong-Min Lee
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea
| | - Youngsuk Kim
- Department of Chemistry, Pohang University of Science and Technology, Pohang 37673, Korea
| | - Eunsung Lee
- Department of Chemistry, Pohang University of Science and Technology, Pohang 37673, Korea
| | - Ritimukta Sarangi
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, United States
| | - Shunichi Fukuzumi
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea
| | - Wonwoo Nam
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea
| |
Collapse
|
9
|
Nanocrystals perovskites photocatalyzed singlet oxygen generation for light-driven organic reactions. Photochem Photobiol Sci 2021; 21:613-624. [PMID: 34617257 DOI: 10.1007/s43630-021-00106-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 09/16/2021] [Indexed: 10/20/2022]
Abstract
Lead halide perovskite nanocrystals were prepared and used as photocatalysts for the in situ 1O2 generation to perform hetero Diels-Alder, ene and oxidation reactions with suitable dienes and alkenes. The methodology has been reasonably standardized and made applicable to a variety of olefinic substrates. The scope of the method is finely illustrated by the results in all the tested reactions, which allowed to obtain desymmetrized hydroxy-ketone derivatives, unsaturated ketones and epoxides. Some limitations were also observed especially in the case of the alkene oxidations as well as poor chemoselectivity was somewhere observed. 1O2 generated by lead halide perovskite nanocrystals as photocatalyst in organic reactions.
Collapse
|
10
|
Ganesan K, Kaliyaperumal I, Vadivelu P. A Density Functional Theory Study on Comparing the Reactivity of [Mn(13-TMC)(OOH)] 2+ and [Mn(13-TMC)(O 2)] + for the Sulfoxidation of Thioanisole: Elucidation of Substrate and Non-Redox Metal Ion Effects. Inorg Chem 2021; 60:13615-13625. [PMID: 34410107 DOI: 10.1021/acs.inorgchem.1c01915] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The reactivities of [Mn(13-TMC)(OOH)]2+ (1) and [Mn(13-TMC)(O2)]+ (2) in the sulfoxidation of thioanisole have been compared using density functional theory methods. The orientation of the 13-TMC ligand and substrate and non-redox metal ion effects have been considered to improve the oxidation efficiency of 1 and 2. In 1, the syn- and anti-orientation of the 13-TMC ligand do not change the coordination of the Mn ion. In contrast, the orientation of the 13-TMC ligand regulates the geometry of 2, wherein the syn-13-TMC ligand exhibits the MnIII-peroxo (2hs and 2ls) species, while the anti-13-TMC shows the MnII-superoxo (2'hs and 2'ls) species. However, the MnII-superoxo species are found to be less stable than the MnIII-peroxo complexes by around +26.6 kcal/mol. The ground state geometries of 1 and 2 with the syn-13-TMC ligand are found to be more stable in the high- (S = 2) spin states (1hs and 2hs) than the low- (S = 1) spin complexes (1ls and 2ls), by +15.6 and +25.5 kcal/mol, respectively. The computed mechanistic pathways clearly indicate that the sulfoxidation of thioanisole by 1hs is kinetically (by +16.6 to +46.1 kcal/mol) and thermodynamically (+14.4 to +56.1 kcal/mol) more preferred than 1ls, 2hs, and 2ls species. This is mainly due to the feasible heterolytic O1-O2 bond cleavage followed by the proton transfer step. In addition, the molecular electrostatic potential analysis indicates that the higher oxidation efficacy of 1hs than 2hs is due to the -OOH moiety. The reactivity of 1hs is further enhanced by incorporating electron donating substituents in thioanisole, wherein the p-NH2 thioanisole decreases the ΔG‡ of 1hs by 28%. Interestingly, the incorporation of non-redox metal ions (Mn+ = Sc3+, Y3+, Mg2+, and Zn2+) improves the reactivity of 2hs, wherein the non-redox metal ions tend to bind with the oxygen atoms of 2hs and subsequently shift the one-electron reduction potential (E0(red) vs SCE) toward the positive side. The positive shift in the E0(red) is more evident in 2hs-Y3+ that significantly decreases the ΔG‡ of 2hs by 58.7%, which is in fact lower than the ΔG‡ of 1hs by +2.0 kcal/mol. Hence, in the presence of Y3+, the reactivity of 2hs is comparable with 1hs in the sulfoxidation of thioanisole.
Collapse
Affiliation(s)
- Krithika Ganesan
- Department of Chemistry, Central University of Tamil Nadu, Neelakudi, Thiruvarur 610 005, India
| | - Ilakya Kaliyaperumal
- Department of Chemistry, Central University of Tamil Nadu, Neelakudi, Thiruvarur 610 005, India
| | - Prabha Vadivelu
- Department of Chemistry, Central University of Tamil Nadu, Neelakudi, Thiruvarur 610 005, India
| |
Collapse
|
11
|
Jana RD, Das A, Paine TK. Enhancing Chemo- and Stereoselectivity in C-H Bond Oxygenation with H 2O 2 by Nonheme High-Spin Iron Catalysts: The Role of Lewis Acid and Multimetal Centers. Inorg Chem 2021; 60:5969-5979. [PMID: 33784082 DOI: 10.1021/acs.inorgchem.1c00397] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Spin states of iron often direct the selectivity in oxidation catalysis by iron complexes using hydrogen peroxide (H2O2) on an oxidant. While low-spin iron(III) hydroperoxides display stereoselective C-H bond hydroxylation, the reactions are nonstereoselective with high-spin iron(II) catalysts. The catalytic studies with a series of high-spin iron(II) complexes of N4 ligands with H2O2 and Sc3+ reported here reveal that the Lewis acid promotes catalytic C-H bond hydroxylation with high chemo- and stereoselectivity. This reactivity pattern is observed with iron(II) complexes containing two cis-labile sites. The enhanced selectivity for C-H bond hydroxylation catalyzed by the high-spin iron(II) complexes in the presence of Sc3+ parallels that of the low-spin iron catalysts. Furthermore, the introduction of multimetal centers enhances the activity and selectivity of the iron catalyst. The study provides insights into the development of peroxide-dependent bioinspired catalysts for the selective oxygenation of C-H bonds without the restriction of using iron complexes of strong-field ligands.
Collapse
Affiliation(s)
- Rahul Dev Jana
- School of Chemical Sciences, Indian Association for the Cultivation of Science (IACS), 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India
| | - Abhishek Das
- School of Chemical Sciences, Indian Association for the Cultivation of Science (IACS), 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India
| | - Tapan Kanti Paine
- School of Chemical Sciences, Indian Association for the Cultivation of Science (IACS), 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700032, India
| |
Collapse
|
12
|
Dyckhoff F, Schlagintweit JF, Bernd MA, Jakob CHG, Schlachta TP, Hofmann BJ, Reich RM, Kühn FE. Degradation pathways of a highly active iron(iii) tetra-NHC epoxidation catalyst. Catal Sci Technol 2021. [DOI: 10.1039/d0cy02433c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Elucidation of different decomposition pathways of a highly active tetradentate iron–NHC epoxidation catalyst reveals direct carbene oxidation to be the decisive cause of catalyst degradation.
Collapse
Affiliation(s)
- Florian Dyckhoff
- Molecular Catalysis, Catalysis Research Center and Department of Chemistry
- Technische Universität München
- 85748 Garching bei München
- Germany
| | - Jonas F. Schlagintweit
- Molecular Catalysis, Catalysis Research Center and Department of Chemistry
- Technische Universität München
- 85748 Garching bei München
- Germany
| | - Marco A. Bernd
- Molecular Catalysis, Catalysis Research Center and Department of Chemistry
- Technische Universität München
- 85748 Garching bei München
- Germany
| | - Christian H. G. Jakob
- Molecular Catalysis, Catalysis Research Center and Department of Chemistry
- Technische Universität München
- 85748 Garching bei München
- Germany
| | - Tim P. Schlachta
- Molecular Catalysis, Catalysis Research Center and Department of Chemistry
- Technische Universität München
- 85748 Garching bei München
- Germany
| | - Benjamin J. Hofmann
- Molecular Catalysis, Catalysis Research Center and Department of Chemistry
- Technische Universität München
- 85748 Garching bei München
- Germany
| | - Robert M. Reich
- Molecular Catalysis, Catalysis Research Center and Department of Chemistry
- Technische Universität München
- 85748 Garching bei München
- Germany
| | - Fritz E. Kühn
- Molecular Catalysis, Catalysis Research Center and Department of Chemistry
- Technische Universität München
- 85748 Garching bei München
- Germany
| |
Collapse
|
13
|
Corti M, Chiara R, Romani L, Mannucci B, Malavasi L, Quadrelli P. g-C 3N 4/metal halide perovskite composites as photocatalysts for singlet oxygen generation processes for the preparation of various oxidized synthons. Catal Sci Technol 2021. [DOI: 10.1039/d0cy02352c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Singlet oxygen generated by g-C3N4/metal halide perovskite composites as photocatalysts in organic oxidation reactions.
Collapse
Affiliation(s)
- Marco Corti
- University of Pavia
- Department of Chemistry
- 27100 – Pavia
- Italy
| | - Rossella Chiara
- University of Pavia
- Department of Chemistry
- 27100 – Pavia
- Italy
| | - Lidia Romani
- University of Pavia
- Department of Chemistry
- 27100 – Pavia
- Italy
| | - Barbara Mannucci
- University of Pavia
- Centro Grandi Strumenti (CGS)
- 27100 – Pavia
- Italy
| | | | - Paolo Quadrelli
- University of Pavia
- Department of Chemistry
- 27100 – Pavia
- Italy
| |
Collapse
|
14
|
Zeng M, Lou C, Xue J, Jiang H, Li K, Chen Z, Fu S, Yin G. Palladium (II)‐catalyzed homogeneous alcohol oxidations: Disclosing the crucial contribution of palladium nanoparticles in catalysis. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.6093] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Miao Zeng
- School of Chemistry and Chemical Engineering, Key laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure Huazhong University of Science and Technology Wuhan China
| | - Chenlin Lou
- School of Chemistry and Chemical Engineering, Key laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure Huazhong University of Science and Technology Wuhan China
| | - Jing‐Wen Xue
- School of Chemistry and Chemical Engineering, Key laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure Huazhong University of Science and Technology Wuhan China
| | - Hongwu Jiang
- School of Chemistry and Chemical Engineering, Key laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure Huazhong University of Science and Technology Wuhan China
| | - Kaiwen Li
- School of Chemistry and Chemical Engineering, Key laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure Huazhong University of Science and Technology Wuhan China
| | - Zhuqi Chen
- School of Chemistry and Chemical Engineering, Key laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure Huazhong University of Science and Technology Wuhan China
| | - Shitao Fu
- School of Chemistry and Chemical Engineering, Key laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure Huazhong University of Science and Technology Wuhan China
| | - Guochuan Yin
- School of Chemistry and Chemical Engineering, Key laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure Huazhong University of Science and Technology Wuhan China
| |
Collapse
|
15
|
Bernd MA, Dyckhoff F, Hofmann BJ, Böth AD, Schlagintweit JF, Oberkofler J, Reich RM, Kühn FE. Tuning the electronic properties of tetradentate iron-NHC complexes: Towards stable and selective epoxidation catalysts. J Catal 2020. [DOI: 10.1016/j.jcat.2020.08.037] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
16
|
Xue SS, Li XX, Lee YM, Seo MS, Kim Y, Yanagisawa S, Kubo M, Jeon YK, Kim WS, Sarangi R, Kim SH, Fukuzumi S, Nam W. Enhanced Redox Reactivity of a Nonheme Iron(V)-Oxo Complex Binding Proton. J Am Chem Soc 2020; 142:15305-15319. [PMID: 32786748 DOI: 10.1021/jacs.0c05108] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Acid effects on the chemical properties of metal-oxygen intermediates have attracted much attention recently, such as the enhanced reactivity of high-valent metal(IV)-oxo species by binding proton(s) or Lewis acidic metal ion(s) in redox reactions. Herein, we report for the first time the proton effects of an iron(V)-oxo complex bearing a negatively charged tetraamido macrocyclic ligand (TAML) in oxygen atom transfer (OAT) and electron-transfer (ET) reactions. First, we synthesized and characterized a mononuclear nonheme Fe(V)-oxo TAML complex (1) and its protonated iron(V)-oxo complexes binding two and three protons, which are denoted as 2 and 3, respectively. The protons were found to bind to the TAML ligand of the Fe(V)-oxo species based on spectroscopic characterization, such as resonance Raman, extended X-ray absorption fine structure (EXAFS), and electron paramagnetic resonance (EPR) measurements, along with density functional theory (DFT) calculations. The two-protons binding constant of 1 to produce 2 and the third protonation constant of 2 to produce 3 were determined to be 8.0(7) × 108 M-2 and 10(1) M-1, respectively. The reactivities of the proton-bound iron(V)-oxo complexes were investigated in OAT and ET reactions, showing a dramatic increase in the rate of sulfoxidation of thioanisole derivatives, such as 107 times increase in reactivity when the oxidation of p-CN-thioanisole by 1 was performed in the presence of HOTf (i.e., 200 mM). The one-electron reduction potential of 2 (Ered vs SCE = 0.97 V) was significantly shifted to the positive direction, compared to that of 1 (Ered vs SCE = 0.33 V). Upon further addition of a proton to a solution of 2, a more positive shift of the Ered value was observed with a slope of 47 mV/log([HOTf]). The sulfoxidation of thioanisole derivatives by 2 was shown to proceed via ET from thioanisoles to 2 or direct OAT from 2 to thioanisoles, depending on the ET driving force.
Collapse
Affiliation(s)
- Shan-Shan Xue
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea
| | - Xiao-Xi Li
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea
| | - Yong-Min Lee
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea
| | - Mi Sook Seo
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea
| | - Yujeong Kim
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea.,Western Seoul Center, Korea Basic Science Institute, Seoul 03759, Korea
| | - Sachiko Yanagisawa
- Graduate School of Life Science, University of Hyogo, Hyogo 678-1297, Japan
| | - Minoru Kubo
- Graduate School of Life Science, University of Hyogo, Hyogo 678-1297, Japan
| | - Young-Kyo Jeon
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea
| | - Won-Suk Kim
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea
| | - Ritimukta Sarangi
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, California 94025, United States
| | - Sun Hee Kim
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea.,Western Seoul Center, Korea Basic Science Institute, Seoul 03759, Korea
| | - Shunichi Fukuzumi
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea
| | - Wonwoo Nam
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea.,School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
| |
Collapse
|
17
|
Xu A, Wei Y, Zou Q, Zhang W, Jin Y, Wang Z, Yang L, Li X. The effects of nonredox metal ions on the activation of peroxymonosulfate for organic pollutants degradation in aqueous solution with cobalt based catalysts: A new mechanism investigation. JOURNAL OF HAZARDOUS MATERIALS 2020; 382:121081. [PMID: 31470296 DOI: 10.1016/j.jhazmat.2019.121081] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Revised: 08/05/2019] [Accepted: 08/21/2019] [Indexed: 06/10/2023]
Abstract
Herein, a new peroxymonosulfate (PMS) activation system was proposed employing nonredox metal ions as Lewis acids (LA), which have been widely recognized to play important roles in many biological and chemical oxidations. With Co2+ ions as model catalysts, it was found that oxidizing power of PMS was enhanced after binding weak LA such as Ca2+ ions, leading to its easier reduction to active radicals and substantial enhancement of dye degradation. The promoting effect of Ca2+ was also observed with other cobalt catalysts including CoFe2O4 and Co3O4. The rate of PMS decomposition in Co2++LA/PMS system was correlated with Lewis acidity; while in the presence of strong LA including La3+ and Y3+, the dye degradation rate declined. The interactions of LA with PMS were characterized and the detailed mechanism was proposed. The present study provides the first example of the promoting effect of weak LA on PMS activation with cobalt based catalysts.
Collapse
Affiliation(s)
- Aihua Xu
- School of Environmental Engineering, Wuhan Textile University, Wuhan, 430200, PR China
| | - Yi Wei
- School of Environmental Engineering, Wuhan Textile University, Wuhan, 430200, PR China
| | - Qiancheng Zou
- School of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan, 430200, PR China
| | - Wenyu Zhang
- School of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan, 430200, PR China
| | - Yezi Jin
- School of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan, 430200, PR China
| | - Zeyu Wang
- School of Environmental Engineering, Wuhan Textile University, Wuhan, 430200, PR China
| | - Lizhen Yang
- School of Environmental Engineering, Wuhan Textile University, Wuhan, 430200, PR China
| | - Xiaoxia Li
- School of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan, 430200, PR China; Engineering Research Center for Clean Production of Textile Dyeing and Printing, Ministry of Education, Wuhan, 430200, PR China.
| |
Collapse
|
18
|
Dyckhoff F, Schlagintweit JF, Reich RM, Kühn FE. Pushing the limits of activity and stability: the effects of Lewis acids on non-heme iron–NHC epoxidation catalysts. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00631a] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Tetradentate iron–NHC complexes exhibit unprecedented activity (TOF: 410 000 h−1) in the epoxidation of cis-cyclooctene by addition of Lewis acids.
Collapse
Affiliation(s)
- Florian Dyckhoff
- Molecular Catalysis
- Catalysis Research Center and Department of Chemistry
- Technische Universität München
- 85748 Garching bei München
- Germany
| | - Jonas F. Schlagintweit
- Molecular Catalysis
- Catalysis Research Center and Department of Chemistry
- Technische Universität München
- 85748 Garching bei München
- Germany
| | - Robert M. Reich
- Molecular Catalysis
- Catalysis Research Center and Department of Chemistry
- Technische Universität München
- 85748 Garching bei München
- Germany
| | - Fritz E. Kühn
- Molecular Catalysis
- Catalysis Research Center and Department of Chemistry
- Technische Universität München
- 85748 Garching bei München
- Germany
| |
Collapse
|
19
|
Li X, Zou Q, Wei Y, Zhang W, Feng X, Zhou X, Xu A. Lewis acids promoted organic pollutants degradation in aqueous solution with peroxymonosulfate and MnO 2: New insights into the activation mechanism. CHEMOSPHERE 2020; 239:124763. [PMID: 31526989 DOI: 10.1016/j.chemosphere.2019.124763] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 08/27/2019] [Accepted: 09/04/2019] [Indexed: 06/10/2023]
Abstract
Nonredox metal ions have been widely recognized to be important in a wide range of biological and chemical oxidations as Lewis acids (LA). However, the role of LA in peroxymonosulfate (PMS) activation for wastewater treatment has not been considered until now. This study shows that oxidizing power of PMS can be promoted after binding nonredox metal ions such as Ca2+ as LA, leading to the easier reduction of the oxidant to radicals and substantial enhancement of dye degradation by employing manganese oxides OMS-2 as model catalysts. Increased with Lewis acidity of the metal ion, the rate of PMS decomposition enhanced linearly, while the dye degradation rate first increased and then declined due to the formation of a larger amount of dioxygen. The interactions between Ca2+ and PMS were further investigated by Raman, cyclic voltammetry and XPS; and the detailed mechanism of PMS activation was proposed. The performance of Ca2++OMS-2/PMS system under different conditions was also studied. The findings indicate the importance of LA in PMS activation reaction and their role must be considered in other transition metal oxides/PMS systems. It will be also helpful to design new and highly active catalysts for the reactions.
Collapse
Affiliation(s)
- Xiaoxia Li
- School of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan, 430200, PR China
| | - Qiancheng Zou
- School of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan, 430200, PR China
| | - Yi Wei
- School of Environmental Engineering, Wuhan Textile University, Wuhan, 430200, PR China
| | - Wenyu Zhang
- School of Environmental Engineering, Wuhan Textile University, Wuhan, 430200, PR China
| | - Xianjie Feng
- School of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan, 430200, PR China
| | - Xiaochuan Zhou
- School of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan, 430200, PR China
| | - Aihua Xu
- School of Environmental Engineering, Wuhan Textile University, Wuhan, 430200, PR China; Engineering Research Center for Clean Production of Textile Dyeing and Printing, Ministry of Education, Wuhan, 430200, PR China.
| |
Collapse
|
20
|
Lu X, Lee YM, Seo MS, Nam W. Proton-promoted disproportionation of iron(v)-imido TAML to iron(v)-imido TAML cation radical and iron(iv) TAML. Chem Commun (Camb) 2020; 56:11207-11210. [DOI: 10.1039/d0cc05145d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
An iron(v)-imido TAML complex is disproportionated to give an iron(v)-imido TAML cation radical and an iron(iv) TAML upon addition of acids.
Collapse
Affiliation(s)
- Xiaoyan Lu
- Department of Chemistry and Nano Science
- Ewha Womans University
- Seoul 03760
- Korea
| | - Yong-Min Lee
- Department of Chemistry and Nano Science
- Ewha Womans University
- Seoul 03760
- Korea
| | - Mi Sook Seo
- Department of Chemistry and Nano Science
- Ewha Womans University
- Seoul 03760
- Korea
| | - Wonwoo Nam
- Department of Chemistry and Nano Science
- Ewha Womans University
- Seoul 03760
- Korea
| |
Collapse
|
21
|
Steen JD, Stepanovic S, Parvizian M, de Boer JW, Hage R, Chen J, Swart M, Gruden M, Browne WR. Lewis versus Brønsted Acid Activation of a Mn(IV) Catalyst for Alkene Oxidation. Inorg Chem 2019; 58:14924-14930. [PMID: 31625380 PMCID: PMC6832668 DOI: 10.1021/acs.inorgchem.9b02737] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
![]()
Lewis acid (LA) activation
by coordination to metal oxido species
has emerged as a new strategy in catalytic oxidations. Despite the
many reports of enhancement of performance in oxidation catalysis,
direct evidence for LA-catalyst interactions under catalytically relevant
conditions is lacking. Here, we show, using the oxidation of alkenes
with H2O2 and the catalyst [Mn2(μ-O)3(tmtacn)2](PF6)2 (1), that Lewis acids commonly used to enhance catalytic activity,
e.g., Sc(OTf)3, in fact undergo hydrolysis with adventitious
water to release a strong Brønsted acid. The formation of Brønsted
acids in situ is demonstrated using a combination of resonance Raman,
UV/vis absorption spectroscopy, cyclic voltammetry, isotope labeling,
and DFT calculations. The involvement of Brønsted acids in LA
enhanced systems shown here holds implications for the conclusions
reached in regard to the relevance of direct LA-metal oxido interactions
under catalytic conditions. Lewis acid activation of oxidation
catalysts is proposed
to be through binding of the Lewis acids to metal-oxo species. The
activity of the catalyst [Mn2(μ-O)3(tmtacn)2](PF6)2 in the oxidation of alkenes
with H2O2 appears to correlate with the strength
of the Lewis acid used for its activation. We show that the correlation
arises from the relative propensity of the Lewis acids to generate
Brønsted acids in situ.
Collapse
Affiliation(s)
- Jorn D Steen
- Molecular Inorganic Chemistry, Stratingh Institute for Chemistry, Faculty of Science and Engineering , University of Groningen , Nijenborgh 4 , 9747 AG , Groningen , The Netherlands
| | - Stepan Stepanovic
- Faculty of Chemistry , University of Belgrade , Studentski trg 12-16 , 11000 Belgrade , Serbia
| | - Mahsa Parvizian
- Molecular Inorganic Chemistry, Stratingh Institute for Chemistry, Faculty of Science and Engineering , University of Groningen , Nijenborgh 4 , 9747 AG , Groningen , The Netherlands
| | - Johannes W de Boer
- Catexel B.V. , BioPartner Center Leiden , Galileiweg 8 , 2333 BD Leiden , The Netherlands
| | - Ronald Hage
- Molecular Inorganic Chemistry, Stratingh Institute for Chemistry, Faculty of Science and Engineering , University of Groningen , Nijenborgh 4 , 9747 AG , Groningen , The Netherlands.,Catexel B.V. , BioPartner Center Leiden , Galileiweg 8 , 2333 BD Leiden , The Netherlands
| | - Juan Chen
- Department of Applied Chemistry, School of Science , Northwestern Polytechnical University , Xi'an , Shaanxi 710072 , China
| | - Marcel Swart
- IQCC & Departament de Química , Universitat de Girona , Campus Montilivi (Ciències) , 17003 Girona , Spain.,ICREA , Pg. Lluís Companys 23 , 08010 Barcelona , Spain
| | - Maja Gruden
- Faculty of Chemistry , University of Belgrade , Studentski trg 12-16 , 11000 Belgrade , Serbia
| | - Wesley R Browne
- Molecular Inorganic Chemistry, Stratingh Institute for Chemistry, Faculty of Science and Engineering , University of Groningen , Nijenborgh 4 , 9747 AG , Groningen , The Netherlands
| |
Collapse
|
22
|
Wang Y, Gayet F, Guillo P, Agustin D. Organic Solvent-Free Olefins and Alcohols (ep)oxidation Using Recoverable Catalysts Based on [PM 12O 40] 3- (M = Mo or W) Ionically Grafted on Amino Functionalized Silica Nanobeads. MATERIALS (BASEL, SWITZERLAND) 2019; 12:E3278. [PMID: 31600903 PMCID: PMC6829895 DOI: 10.3390/ma12203278] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 09/25/2019] [Accepted: 09/27/2019] [Indexed: 12/18/2022]
Abstract
Catalyzed organic solvent-free (ep)oxidation were achieved using H3PM12O40 (M = Mo or W) complexes ionically grafted on APTES-functionalized nano-silica beads obtained from straightforward method (APTES = aminopropyltriethoxysilane). Those catalysts have been extensively analyzed through morphological studies (Dynamic Light Scattering (DLS), TEM) and several spectroscopic qualitative (IR, multinuclear solid-state NMR) and quantitative (1H and 31P solution NMR) methods. Interesting catalytic results were obtained for the epoxidation of cyclooctene, cyclohexene, limonene and oxidation of cyclohexanol with a lower [POM]/olefin ratio. The catalysts were found to be recyclable and reused during three runs with similar catalytic performances.
Collapse
Affiliation(s)
- Yun Wang
- CNRS, LCC (Laboratoire de Chimie de Coordination), Université de Toulouse, UPS, INPT, 205, route de Narbonne, F-31077 Toulouse, France.
- Université de Toulouse, Institut Universitaire de Technologie Paul Sabatier-Département de Chimie, Av. Georges Pompidou, BP 20258, F-81104 Castres, CEDEX, France.
| | - Florence Gayet
- CNRS, LCC (Laboratoire de Chimie de Coordination), Université de Toulouse, UPS, INPT, 205, route de Narbonne, F-31077 Toulouse, France.
- INPT, ENSIACET 4, allée Emile Monso-CS 44362, F-31030 Toulouse, CEDEX 4, France.
| | - Pascal Guillo
- CNRS, LCC (Laboratoire de Chimie de Coordination), Université de Toulouse, UPS, INPT, 205, route de Narbonne, F-31077 Toulouse, France.
- Université de Toulouse, Institut Universitaire de Technologie Paul Sabatier-Département de Chimie, Av. Georges Pompidou, BP 20258, F-81104 Castres, CEDEX, France.
| | - Dominique Agustin
- CNRS, LCC (Laboratoire de Chimie de Coordination), Université de Toulouse, UPS, INPT, 205, route de Narbonne, F-31077 Toulouse, France.
- Université de Toulouse, Institut Universitaire de Technologie Paul Sabatier-Département de Chimie, Av. Georges Pompidou, BP 20258, F-81104 Castres, CEDEX, France.
| |
Collapse
|
23
|
Piquette MC, Kryatov SV, Rybak-Akimova EV. Kinetic Studies on the Oxoiron(IV) Complex with Tetradentate Aminopyridine Ligand PDP*: Restoration of Catalytic Activity by Reduction with H2O2. Inorg Chem 2019; 58:13382-13393. [DOI: 10.1021/acs.inorgchem.9b02269] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Marc C. Piquette
- Department of Chemistry, Tufts University, 62 Talbot Avenue, Medford, Massachusetts 02155, United States
| | - Sergiy V. Kryatov
- Department of Chemistry, Tufts University, 62 Talbot Avenue, Medford, Massachusetts 02155, United States
| | - Elena V. Rybak-Akimova
- Department of Chemistry, Tufts University, 62 Talbot Avenue, Medford, Massachusetts 02155, United States
| |
Collapse
|
24
|
Xue JW, Zeng M, Zhang S, Chen Z, Yin G. Lewis Acid Promoted Aerobic Oxidative Coupling of Thiols with Phosphonates by Simple Nickel(II) Catalyst: Substrate Scope and Mechanistic Studies. J Org Chem 2019; 84:4179-4190. [DOI: 10.1021/acs.joc.9b00194] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Jing-Wen Xue
- School of Chemistry and Chemical Engineering, Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, Huazhong University of Science and Technology, Wuhan 430074, P.R. China
| | - Miao Zeng
- School of Chemistry and Chemical Engineering, Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, Huazhong University of Science and Technology, Wuhan 430074, P.R. China
| | - Sicheng Zhang
- School of Chemistry and Chemical Engineering, Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, Huazhong University of Science and Technology, Wuhan 430074, P.R. China
| | - Zhuqi Chen
- School of Chemistry and Chemical Engineering, Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, Huazhong University of Science and Technology, Wuhan 430074, P.R. China
| | - Guochuan Yin
- School of Chemistry and Chemical Engineering, Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, Huazhong University of Science and Technology, Wuhan 430074, P.R. China
| |
Collapse
|
25
|
Lionetti D, Suseno S, Tsui EY, Lu L, Stich TA, Carsch KM, Nielsen RJ, Goddard WA, Britt RD, Agapie T. Effects of Lewis Acidic Metal Ions (M) on Oxygen-Atom Transfer Reactivity of Heterometallic Mn 3MO 4 Cubane and Fe 3MO(OH) and Mn 3MO(OH) Clusters. Inorg Chem 2019; 58:2336-2345. [PMID: 30730725 DOI: 10.1021/acs.inorgchem.8b02701] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The modulation of the reactivity of metal oxo species by redox inactive metals has attracted much interest due to the observation of redox inactive metal effects on processes involving electron transfer both in nature (the oxygen-evolving complex of Photosystem II) and in heterogeneous catalysis (mixed-metal oxides). Studies of small-molecule models of these systems have revealed numerous instances of effects of redox inactive metals on electron- and group-transfer reactivity. However, the heterometallic species directly involved in these transformations have rarely been structurally characterized and are often generated in situ. We have previously reported the preparation and structural characterization of multiple series of heterometallic clusters based on Mn3 and Fe3 cores and described the effects of Lewis acidity of the heterometal incorporated in these complexes on cluster reduction potential. To determine the effects of Lewis acidity of redox inactive metals on group transfer reactivity in structurally well-defined complexes, we studied [Mn3MO4], [Mn3MO(OH)], and [Fe3MO(OH)] clusters in oxygen atom transfer (OAT) reactions with phosphine substrates. The qualitative rate of OAT correlates with the Lewis acidity of the redox inactive metal, confirming that Lewis acidic metal centers can affect the chemical reactivity of metal oxo species by modulating cluster electronics.
Collapse
Affiliation(s)
| | | | | | - Luo Lu
- Department of Chemistry , University of California , Davis , California 95616 , United States
| | - Troy A Stich
- Department of Chemistry , University of California , Davis , California 95616 , United States
| | | | | | | | - R David Britt
- Department of Chemistry , University of California , Davis , California 95616 , United States
| | | |
Collapse
|
26
|
Liu Y, Lau TC. Activation of Metal Oxo and Nitrido Complexes by Lewis Acids. J Am Chem Soc 2019; 141:3755-3766. [DOI: 10.1021/jacs.8b13100] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Yingying Liu
- Department of Chemistry and Institute of Molecular Functional Materials, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong 999077, China
| | - Tai-Chu Lau
- Department of Chemistry and Institute of Molecular Functional Materials, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong 999077, China
| |
Collapse
|
27
|
Chang HC, Mondal B, Fang H, Neese F, Bill E, Ye S. Electron Paramagnetic Resonance Signature of Tetragonal Low Spin Iron(V)-Nitrido and -Oxo Complexes Derived from the Electronic Structure Analysis of Heme and Non-Heme Archetypes. J Am Chem Soc 2019; 141:2421-2434. [PMID: 30620571 PMCID: PMC6728100 DOI: 10.1021/jacs.8b11429] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
Iron(V)-nitrido and -oxo complexes
have been proposed as key intermediates
in a diverse array of chemical transformations. Herein we present
a detailed electronic-structure analysis of [FeV(N)(TPP)]
(1, TPP2– = tetraphenylporphyrinato),
and [FeV(N)(cyclam-ac)]+ (2, cyclam-ac
= 1,4,8,11-tetraazacyclotetradecane-1-acetato) using electron paramagnetic
resonance (EPR) and 57Fe Mössbauer spectroscopy
coupled with wave function based complete active-space self-consistent
field (CASSCF) calculations. The findings were compared with all other
well-characterized genuine iron(V)-nitrido and -oxo complexes, [FeV(N)(MePy2tacn)](PF6)2 (3, MePy2tacn = methyl-N′,N″-bis(2-picolyl)-1,4,7-triazacyclononane), [FeV(N){PhB(t-BuIm)3}]+ (4, PhB(tBuIm)3– = phenyltris(3-tert-butylimidazol-2-ylidene)borate),
and [FeV(O)(TAML)]− (5,
TAML4– = tetraamido macrocyclic ligand). Our results
revealed that complex 1 is an authenticated iron(V)-nitrido
species and contrasts with its oxo congener, compound I, which contains
a ferryl unit interacting with a porphyrin radical. More importantly,
tetragonal iron(V)-nitrido and -oxo complexes 1–3 and 5 all possess an orbitally nearly doubly
degenerate S = 1/2 ground state. Consequently, analogous
near-axial EPR spectra with g|| < g⊥ ≤ 2 were measured for them,
and their g|| and g⊥ values were found to obey a simple relation of g⊥2 + (2 – g∥)2 = 4. However, the bonding situation for trigonal iron(V)-nitrido
complex 4 is completely different as evidenced by its
distinct EPR spectrum with g|| < 2
< g⊥. Further in-depth analyses
suggested that tetragonal low spin iron(V)-nitrido and -oxo complexes
feature electronic structures akin to those found for complexes 1–3 and 5. Therefore, the
characteristic EPR signals determined for 1–3 and 5 can be used as a spectroscopic marker
to identify such highly reactive intermediates in catalytic processes.
Collapse
Affiliation(s)
- Hao-Ching Chang
- Max-Planck-Institut für Kohlenforschung , Kaiser-Wilhelm-Platz 1 , D-45470 Mülheim an der Ruhr , Germany
| | - Bhaskar Mondal
- Max-Planck-Institut für Chemische Energiekonversion , Stiftstr. 34-36 , D-45470 Mülheim an der Ruhr , Germany
| | - Huayi Fang
- Max-Planck-Institut für Chemische Energiekonversion , Stiftstr. 34-36 , D-45470 Mülheim an der Ruhr , Germany
| | - Frank Neese
- Max-Planck-Institut für Kohlenforschung , Kaiser-Wilhelm-Platz 1 , D-45470 Mülheim an der Ruhr , Germany
| | - Eckhard Bill
- Max-Planck-Institut für Chemische Energiekonversion , Stiftstr. 34-36 , D-45470 Mülheim an der Ruhr , Germany
| | - Shengfa Ye
- Max-Planck-Institut für Kohlenforschung , Kaiser-Wilhelm-Platz 1 , D-45470 Mülheim an der Ruhr , Germany
| |
Collapse
|
28
|
Sankaralingam M, Lee YM, Pineda-Galvan Y, Karmalkar DG, Seo MS, Jeon SH, Pushkar Y, Fukuzumi S, Nam W. Redox Reactivity of a Mononuclear Manganese-Oxo Complex Binding Calcium Ion and Other Redox-Inactive Metal Ions. J Am Chem Soc 2019; 141:1324-1336. [PMID: 30580510 DOI: 10.1021/jacs.8b11492] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Mononuclear nonheme manganese(IV)-oxo complexes binding calcium ion and other redox-inactive metal ions, [(dpaq)MnIV(O)]+-M n+ (1-Mn+, M n+ = Ca2+, Mg2+, Zn2+, Lu3+, Y3+, Al3+, and Sc3+) (dpaq = 2-[bis(pyridin-2-ylmethyl)]amino- N-quinolin-8-yl-acetamidate), were synthesized by reacting a hydroxomanganese(III) complex, [(dpaq)MnIII(OH)]+, with iodosylbenzene (PhIO) in the presence of redox-inactive metal ions (M n+). The Mn(IV)-oxo complexes were characterized using various spectroscopic techniques. In reactivity studies, we observed contrasting effects of M n+ on the reactivity of 1-M n+ in redox reactions such as electron-transfer (ET), oxygen atom transfer (OAT), and hydrogen atom transfer (HAT) reactions. In the OAT and ET reactions, the reactivity order of 1-M n+, such as 1-Sc3+ ≈ 1-Al3+ > 1-Y3+ > 1-Lu3+ > 1-Zn2+ > 1-Mg2+ > 1-Ca2+, follows the Lewis acidity of M n+ bound to the Mn-O moiety; that is, the stronger the Lewis acidity of M n+, the higher the reactivity of 1-M n+ becomes. In sharp contrast, the reactivity of 1-M n+ in the HAT reaction was reversed, giving the reactivity order 1-Ca2+ > 1-Mg2+ > 1-Zn2+ > 1-Lu3+> 1-Y3+> 1-Al3+ ≈ 1-Sc3+; that is, the higher is Lewis acidity of M n+, the lower the reactivity of 1-M n+ in the HAT reaction. The latter result implies that the Lewis acidity of M n+ bound to the Mn-O moiety can modulate the basicity of the metal-oxo moiety, thus influencing the HAT reactivity of 1-M n+; cytochrome P450 utilizes the axial thiolate ligand to increase the basicity of the iron-oxo moiety, which enhances the reactivity of compound I in C-H bond activation reactions.
Collapse
Affiliation(s)
| | - Yong-Min Lee
- Department of Chemistry and Nano Science , Ewha Womans University , Seoul 03760 , Korea
| | - Yuliana Pineda-Galvan
- Department of Physics and Astronomy , Purdue University , 525 Northwestern Avenue , West Lafayette , Indiana 47907 , United States
| | - Deepika G Karmalkar
- Department of Chemistry and Nano Science , Ewha Womans University , Seoul 03760 , Korea
| | - Mi Sook Seo
- Department of Chemistry and Nano Science , Ewha Womans University , Seoul 03760 , Korea
| | - So Hyun Jeon
- Department of Chemistry and Nano Science , Ewha Womans University , Seoul 03760 , Korea
| | - Yulia Pushkar
- Department of Physics and Astronomy , Purdue University , 525 Northwestern Avenue , West Lafayette , Indiana 47907 , United States
| | - Shunichi Fukuzumi
- Department of Chemistry and Nano Science , Ewha Womans University , Seoul 03760 , Korea.,Faculty of Science and Engineering, SENTAN, Japan Science and Technology Agency (JST) , Meijo University , Nagoya , Aichi 468-8502 , Japan
| | - Wonwoo Nam
- Department of Chemistry and Nano Science , Ewha Womans University , Seoul 03760 , Korea.,State Key Laboratory for Oxo Synthesis and Selective Oxidation, Center for Excellence in Molecular Synthesis, Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP) , Chinese Academy of Sciences , Lanzhou , 730000 , China
| |
Collapse
|
29
|
Kal S, Draksharapu A, Que L. Sc 3+ (or HClO 4) Activation of a Nonheme Fe III-OOH Intermediate for the Rapid Hydroxylation of Cyclohexane and Benzene. J Am Chem Soc 2018; 140:5798-5804. [PMID: 29618199 DOI: 10.1021/jacs.8b01435] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[Fe(β-BPMCN)(CH3CN)2]2+ (1, BPMCN = N,N' -bis(pyridyl-2-methyl)- N,N' -dimethyl- trans-1,2-diaminocyclo-hexane) is a relatively poor catalyst for cyclohexane oxidation by H2O2 and cannot perform benzene hydroxylation. However, addition of Sc3+ activates the 1/H2O2 reaction mixture to be able to hydroxylate cyclohexane and benzene within seconds at -40 °C. A metastable S = 1/2 FeIII-(η1-OOH) intermediate 2 is trapped at -40 °C, which undergoes rapid decay upon addition of Sc3+ at rates independent of [substrate] but linearly dependent on [Sc3+]. HClO4 elicits comparable reactivity as Sc3+ at the same concentration. We thus postulate that these additives both facilitate O-O bond heterolysis of 2 to form a common highly electrophilic FeV═O oxidant that is comparably reactive to the fastest nonheme high-valent iron-oxo oxidants found to date.
Collapse
Affiliation(s)
- Subhasree Kal
- Department of Chemistry and Center for Metals in Biocatalysis , University of Minnesota , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , United States
| | - Apparao Draksharapu
- Department of Chemistry and Center for Metals in Biocatalysis , University of Minnesota , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , United States
| | - Lawrence Que
- Department of Chemistry and Center for Metals in Biocatalysis , University of Minnesota , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , United States
| |
Collapse
|