1
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Golwankar RR, Kumar A, Day VW, Blakemore JD. Revealing the Influence of Diverse Secondary Metal Cations on Redox‐Active Palladium Complexes. Chemistry 2022; 28:e202200344. [DOI: 10.1002/chem.202200344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Indexed: 11/09/2022]
Affiliation(s)
- Riddhi R. Golwankar
- Department of Chemistry University of Kansas 1567 Irving Hill Road Lawrence Kansas 66045 USA
| | - Amit Kumar
- Department of Chemistry University of Kansas 1567 Irving Hill Road Lawrence Kansas 66045 USA
- Current address: Department of Chemistry University of Pennsylvania Philadelphia Pennsylvania 19104 USA
| | - Victor W. Day
- Department of Chemistry University of Kansas 1567 Irving Hill Road Lawrence Kansas 66045 USA
| | - James D. Blakemore
- Department of Chemistry University of Kansas 1567 Irving Hill Road Lawrence Kansas 66045 USA
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2
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Electrocatalytic hydrogen evolution upon reduction of pyridoxal semicarbazone and thiosemicarbazone-based Cu(II) complexes. JOURNAL OF THE SERBIAN CHEMICAL SOCIETY 2022. [DOI: 10.2298/jsc210520050a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The growing global demand for renewable energy sources has pushed renewable, green energy sources to the forefront, among which the production of hydrogen gas from water occupies a significant place. To realize this goal, researchers across the globe are developing various systems that could swiftly catalyze the hydrogen evolution reaction (HER) in the highest possible yield. In the present work, the electrocatalytic HER performances of pyridoxal semicarbazone- and thiosemicarbazone-based Cu(II) complexes, i.e., ([Cu(PLSC)Cl2] and [Cu(PLTSC-H)H2O]Br?H2O) are reported. It has been unambiguously demonstrated that the complexes exhibit enviable level of HER catalytic activity. The catalytic activity of the complexes was not only the function of central metal but it was also controlled by the nature of the coordinating ligand.
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3
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San Esteban ACM, Kuwamura N, Kojima T, Konno T. Dimensional Structures and Electrocatalytic Activities of Platinum(II)-Palladium(II)-Manganese(II) Coordination Polymers Controlled by Chloride versus Bromide. Inorg Chem 2020; 59:14847-14851. [PMID: 33000938 DOI: 10.1021/acs.inorgchem.0c01775] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Here we report the synthesis and structural characterization of heterotrimetallic (PtII2PdII2MnII2)n coordination polymers that show different dimensionalities and electrocatalytic activities depending on chloride and bromide employed in the system. The reaction of the PtII2PdII2 tetranuclear complex [Pd2Pt2(NH3)4(d-pen)4] (1), bearing free carboxylate groups, with Mn2+ in the presence of chloride produced the (PtII2PdII2MnII2)n coordination polymer [Mn2Cl2(H2O)6(1)]Cl2 (2Cl), in which the PtII2PdII2 units of 1 are linked by [MnCl(H2O)3]+ moieties in a 1:2 ratio to form a 2D sheetlike structure. The corresponding reaction in the presence of bromide also gave the (PtII2PdII2MnII2)n coordination polymer [Mn2(H2O)6(1)]Br4 (3Br), but 3Br adopted a 3D network structure via a 1:1 linkage of the PtII2PdII2 units with [Mn2(H2O)6]4+ moieties. These complexes showed appreciably different electrocatalytic activities for H2 evolution.
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Affiliation(s)
| | - Naoto Kuwamura
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Tatsuhiro Kojima
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Takumi Konno
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
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4
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Kennedy CR, Choi BY, Reeves MGR, Jacobsen EN. Enantioselective Catalysis of an Anionic Oxy-Cope Rearrangement Enabled by Synergistic Ion Binding. Isr J Chem 2020; 60:461-474. [PMID: 33132416 PMCID: PMC7592710 DOI: 10.1002/ijch.201900168] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Accepted: 02/20/2020] [Indexed: 01/09/2023]
Abstract
Charge-accelerated rearrangements present interesting challenges to enantioselective catalysis, due in large part to the competing requirements for maximizing reactivity (ion-pair separation) and stereochemical communication. Herein, we describe application of a synergistic ion-binding strategy to catalyze the anionic oxy-Cope rearrangement of a symmetric bis-styrenyl allyl alcohol in up to 75:25 e.r. Structure-reactivity-selectivity relationship studies, including linear free-energy-relationship analyses, with bifunctional urea catalysts indicate that H-bonding and cation-binding interactions act cooperatively to promote the chemo- and enantioselective [3,3]-rearrangement. Implications for catalyst designs applicable to other transformations involving oxyanionic intermediates are discussed.
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Affiliation(s)
- C Rose Kennedy
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA 02138
| | - Bo Young Choi
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA 02138
| | - Mary-Grace R Reeves
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA 02138
| | - Eric N Jacobsen
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA 02138
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5
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Hong Z, Chong WK, Ng AYR, Li M, Ganguly R, Sum TC, Soo HS. Hydrophobic Metal Halide Perovskites for Visible‐Light Photoredox C−C Bond Cleavage and Dehydrogenation Catalysis. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201812225] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Zonghan Hong
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University 21 Nanyang Link Singapore 637371 Singapore
| | - Wee Kiang Chong
- Division of Physics and Applied PhysicsSchool of Physical and Mathematical SciencesNanyang Technological University 21 Nanyang Link Singapore 637371 Singapore
| | - Andrew Yun Ru Ng
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University 21 Nanyang Link Singapore 637371 Singapore
| | - Mingjie Li
- Division of Physics and Applied PhysicsSchool of Physical and Mathematical SciencesNanyang Technological University 21 Nanyang Link Singapore 637371 Singapore
| | - Rakesh Ganguly
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University 21 Nanyang Link Singapore 637371 Singapore
| | - Tze Chien Sum
- Division of Physics and Applied PhysicsSchool of Physical and Mathematical SciencesNanyang Technological University 21 Nanyang Link Singapore 637371 Singapore
| | - Han Sen Soo
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University 21 Nanyang Link Singapore 637371 Singapore
- Solar Fuels LaboratoryNanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore
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6
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Hong Z, Chong WK, Ng AYR, Li M, Ganguly R, Sum TC, Soo HS. Hydrophobic Metal Halide Perovskites for Visible‐Light Photoredox C−C Bond Cleavage and Dehydrogenation Catalysis. Angew Chem Int Ed Engl 2019; 58:3456-3460. [DOI: 10.1002/anie.201812225] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Zonghan Hong
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University 21 Nanyang Link Singapore 637371 Singapore
| | - Wee Kiang Chong
- Division of Physics and Applied PhysicsSchool of Physical and Mathematical SciencesNanyang Technological University 21 Nanyang Link Singapore 637371 Singapore
| | - Andrew Yun Ru Ng
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University 21 Nanyang Link Singapore 637371 Singapore
| | - Mingjie Li
- Division of Physics and Applied PhysicsSchool of Physical and Mathematical SciencesNanyang Technological University 21 Nanyang Link Singapore 637371 Singapore
| | - Rakesh Ganguly
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University 21 Nanyang Link Singapore 637371 Singapore
| | - Tze Chien Sum
- Division of Physics and Applied PhysicsSchool of Physical and Mathematical SciencesNanyang Technological University 21 Nanyang Link Singapore 637371 Singapore
| | - Han Sen Soo
- Division of Chemistry and Biological ChemistrySchool of Physical and Mathematical SciencesNanyang Technological University 21 Nanyang Link Singapore 637371 Singapore
- Solar Fuels LaboratoryNanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore
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7
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Ho XL, Das SP, Ng LKS, Ng AYR, Ganguly R, Soo HS. Cobalt Complex of a Tetraamido Macrocyclic Ligand as a Precursor for Electrocatalytic Hydrogen Evolution. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00032] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Xian Liang Ho
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
- Solar Fuels Laboratory, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
| | - Siva Prasad Das
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
- Department of Chemistry, School of Science, RK University, Bhavnagar Highway, Kasturbadham, Rajkot 360020, Gujarat India
| | - Leonard Kia-Sheun Ng
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
| | - Andrew Yun Ru Ng
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
- Institute of Materials Research and Engineering (IMRE), A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, Singapore 138634
| | - Rakesh Ganguly
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
| | - Han Sen Soo
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
- Solar Fuels Laboratory, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
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8
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Ho XL, Shao H, Ng YY, Ganguly R, Lu Y, Soo HS. Visible Light Driven Hydrogen Evolution by Molecular Nickel Catalysts with Time-Resolved Spectroscopic and DFT Insights. Inorg Chem 2019; 58:1469-1480. [DOI: 10.1021/acs.inorgchem.8b03003] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Xian Liang Ho
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371, Singapore
- Solar Fuels Laboratory, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
| | - Haiyan Shao
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371, Singapore
- Solar Fuels Laboratory, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
| | - Yik Yie Ng
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371, Singapore
| | - Rakesh Ganguly
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371, Singapore
| | - Yunpeng Lu
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371, Singapore
| | - Han Sen Soo
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371, Singapore
- Solar Fuels Laboratory, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
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9
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Ng YY, Tan LJ, Ng SM, Chai YT, Ganguly R, Du Y, Yeow EKL, Soo HS. Spectroscopic Characterization and Mechanistic Studies on Visible Light Photoredox Carbon–Carbon Bond Formation by Bis(arylimino)acenaphthene Copper Photosensitizers. ACS Catal 2018. [DOI: 10.1021/acscatal.8b02502] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yik Yie Ng
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Lisa Jiaying Tan
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Shue Mei Ng
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Yoke Tin Chai
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Rakesh Ganguly
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Yonghua Du
- Institute of Chemical and Engineering Sciences A*STAR, 1 Pesek Road, Singapore 627833
| | - Edwin Kok Lee Yeow
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Han Sen Soo
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
- Solar Fuels Laboratory, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798
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10
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Chantarojsiri T, Reath AH, Yang JY. Cationic Charges Leading to an Inverse Free‐Energy Relationship for N−N Bond Formation by Mn
VI
Nitrides. Angew Chem Int Ed Engl 2018; 57:14037-14042. [DOI: 10.1002/anie.201805832] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2018] [Revised: 07/15/2018] [Indexed: 11/12/2022]
Affiliation(s)
- Teera Chantarojsiri
- Department of Chemistry University of California Irvine CA USA
- Department of Chemistry Faculty of Science Mahidol University Bangkok Thailand
| | | | - Jenny Y. Yang
- Department of Chemistry University of California Irvine CA USA
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11
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Chantarojsiri T, Reath AH, Yang JY. Cationic Charges Leading to an Inverse Free‐Energy Relationship for N−N Bond Formation by Mn
VI
Nitrides. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201805832] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Teera Chantarojsiri
- Department of Chemistry University of California Irvine CA USA
- Department of Chemistry Faculty of Science Mahidol University Bangkok Thailand
| | | | - Jenny Y. Yang
- Department of Chemistry University of California Irvine CA USA
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12
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Yamazaki SI. Metalloporphyrins and related metallomacrocycles as electrocatalysts for use in polymer electrolyte fuel cells and water electrolyzers. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2017.09.016] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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13
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Ghosh D, Febriansyah B, Gupta D, Ng LKS, Xi S, Du Y, Baikie T, Dong Z, Soo HS. Hybrid Nanomaterials with Single-Site Catalysts by Spatially Controllable Immobilization of Nickel Complexes via Photoclick Chemistry for Alkene Epoxidation. ACS NANO 2018; 12:5903-5912. [PMID: 29775278 DOI: 10.1021/acsnano.8b02118] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Catalyst deactivation is a persistent problem not only for the scientific community but also in industry. Isolated single-site heterogeneous catalysts have shown great promise to overcome these problems. Here, a versatile anchoring strategy for molecular complex immobilization on a broad range of semiconducting or insulating metal oxide ( e. g., titanium dioxide, mesoporous silica, cerium oxide, and tungsten oxide) nanoparticles to synthesize isolated single-site catalysts has been studied systematically. An oxidatively stable anchoring group, maleimide, is shown to form covalent linkages with surface hydroxyl functionalities of metal oxide nanoparticles by photoclick chemistry. The nanocomposites have been thoroughly characterized by techniques including UV-visible diffuse reflectance spectroscopy, high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, infrared spectroscopy, and X-ray absorption spectroscopy (XAS). The IR spectroscopic studies confirm the covalent linkages between the maleimide group and surface hydroxyl functionalities of the oxide nanoparticles. The hybrid nanomaterials function as highly efficient catalysts for essentially quantitative oxidations of terminal and internal alkenes and show molecular catalyst product selectivities even in more eco-friendly solvents. XAS studies verify the robustness of the catalysts after several catalytic cycles. We have applied the photoclick anchoring methodology to precisely control the deposition of a luminescent variant of our catalyst on the metal oxide nanoparticles. Overall, we demonstrate a general approach to use irradiation to anchor molecular complexes on oxide nanoparticles to create recyclable, hybrid, single-site catalysts that function with high selectivity in a broad range of solvents. We have achieved a facile, spatially and temporally controllable photoclick method that can potentially be extended to other ligands, catalysts, functional molecules, and surfaces.
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Affiliation(s)
- Dwaipayan Ghosh
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences , Nanyang Technological University , 21 Nanyang Link , Singapore 637371 , Singapore
| | - Benny Febriansyah
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences , Nanyang Technological University , 21 Nanyang Link , Singapore 637371 , Singapore
| | - Disha Gupta
- School of Materials Science and Engineering , 50 Nanyang Avenue , Nanyang Technological University , Singapore 639798 , Singapore
| | - Leonard Kia-Sheun Ng
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences , Nanyang Technological University , 21 Nanyang Link , Singapore 637371 , Singapore
- Energy Research Institute@NTU (ERI@N) , Nanyang Technological University, Interdisciplinary Graduate School , Research Techno Plaza , Singapore 637553 , Singapore
| | - Shibo Xi
- Institute of Chemical and Engineering Sciences A*STAR , 1 Pesek Road , Singapore 627833 , Singapore
| | - Yonghua Du
- Institute of Chemical and Engineering Sciences A*STAR , 1 Pesek Road , Singapore 627833 , Singapore
| | - Tom Baikie
- Energy Research Institute@NTU (ERI@N), Nanyang Technological University , Research Techno Plaza , Singapore 637553 , Singapore
| | - ZhiLi Dong
- School of Materials Science and Engineering , 50 Nanyang Avenue , Nanyang Technological University , Singapore 639798 , Singapore
| | - Han Sen Soo
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences , Nanyang Technological University , 21 Nanyang Link , Singapore 637371 , Singapore
- Solar Fuels Laboratory , Nanyang Technological University , 50 Nanyang Avenue , Singapore 639798 , Singapore
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14
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Lim JH, Engelmann X, Corby S, Ganguly R, Ray K, Soo HS. C-H activation and nucleophilic substitution in a photochemically generated high valent iron complex. Chem Sci 2018; 9:3992-4002. [PMID: 29862004 PMCID: PMC5944818 DOI: 10.1039/c7sc05378a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Accepted: 03/22/2018] [Indexed: 12/15/2022] Open
Abstract
The (photo) chemical oxidation of a (TAML)FeIII complex using outer-sphere oxidants results in valence tautomerisation and C–H activation governed by exogenous anions.
The photochemical oxidation of a (TAML)FeIII complex 1 using visible light generated Ru(bpy)33+ produces valence tautomers (TAML)FeIV (1+) and (TAML˙+)FeIII (1-TAML˙+), depending on the exogenous anions. The presence of labile Cl– or Br– results in a ligand-based oxidation and stabilisation of a radical-cationic (TAML˙+)FeIII complex, which subsequently leads to unprecedented C–H activation followed by nucleophilic substitution on the TAML aryl ring. In contrast, exogenous cyanide culminates in metal-based oxidation, yielding the first example of a crystallographically characterised S = 1 [(TAML)FeIV(CN)2]2– species. This is a rare report of an anion-dependent valence tautomerisation in photochemically accessed high valent (TAML)Fe systems with potential applications in the oxidation of pollutants, hydrocarbons, and water. Furthermore, the nucleophilic aromatic halogenation reaction mediated by (TAML˙+)FeIII represents a novel domain for high-valent metal reactivity and highlights the possible intramolecular ligand or substrate modification pathways under highly oxidising conditions. Our findings therefore shine light on high-valent metal oxidants based on TAMLs and other potential non-innocent ligands and open new avenues for oxidation catalyst design.
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Affiliation(s)
- Jia Hui Lim
- Energy Research Institute@NTU (ERI@N) , Nanyang Technological University , Interdisciplinary Graduate School , Research Techno Plaza , Singapore 63755.,Division of Chemistry and Biological Chemistry , School of Physical and Mathematical Sciences , Nanyang Technological University , 21 Nanyang Link , Singapore 637371 .
| | - Xenia Engelmann
- Humboldt-Universität zu Berlin , Institut für Chemie , Brook-Taylor-Straβe 2 , 12489 Berlin , Germany .
| | - Sacha Corby
- Division of Chemistry and Biological Chemistry , School of Physical and Mathematical Sciences , Nanyang Technological University , 21 Nanyang Link , Singapore 637371 . .,Imperial College London , Department of Chemistry , South Kensington Campus , London , SW7 2AZ , UK
| | - Rakesh Ganguly
- Division of Chemistry and Biological Chemistry , School of Physical and Mathematical Sciences , Nanyang Technological University , 21 Nanyang Link , Singapore 637371 .
| | - Kallol Ray
- Humboldt-Universität zu Berlin , Institut für Chemie , Brook-Taylor-Straβe 2 , 12489 Berlin , Germany .
| | - Han Sen Soo
- Division of Chemistry and Biological Chemistry , School of Physical and Mathematical Sciences , Nanyang Technological University , 21 Nanyang Link , Singapore 637371 . .,Singapore-Berkeley Research Initiative for Sustainable Energy , 1 Create Way , Singapore 138602.,Solar Fuels Laboratory , Nanyang Technological University , 50 Nanyang Avenue , Singapore 639798
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15
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Chantarojsiri T, Ziller JW, Yang JY. Incorporation of redox-inactive cations promotes iron catalyzed aerobic C-H oxidation at mild potentials. Chem Sci 2018; 9:2567-2574. [PMID: 29732136 PMCID: PMC5911827 DOI: 10.1039/c7sc04486k] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Accepted: 01/28/2018] [Indexed: 12/18/2022] Open
Abstract
The synthesis and characterization of the Schiff base complexes Fe(ii) (2M) and Fe(iii)Cl (3M), where M is a K+ or Ba2+ ion incorporated into the ligand, are reported. The Fe(iii/ii) redox potentials are positively shifted by 440 mV (2K) and 640 mV (2Ba) compared to Fe(salen) (salen = N,N'-bis(salicylidene)ethylenediamine), and by 70 mV (3K) and 230 mV (3Ba) compared to Fe(Cl)(salen), which is likely due to an electrostatic effect (electric field) from the cation. The catalytic activity of 3M towards the aerobic oxidation of allylic C-H bonds was explored. Prior studies on iron salen complexes modified through conventional electron-donating or withdrawing substituents found that only the most oxidizing derivatives were competent catalysts. In contrast, the 3M complexes, which are significantly less oxidizing, are both active. Mechanistic studies comparing 3M to Fe(salen) derivatives indicate that the proximal cation contributes to the overall reactivity in the rate determining step. The cationic charge also inhibits oxidative deactivation through formation of the corresponding Fe2-μ-oxo complexes, which were isolated and characterized. This study demonstrates how non-redox active Lewis acidic cations in the secondary coordination sphere can be used to modify redox catalysts in order to operate at milder potentials with a minimal impact on the reactivity, an effect that was unattainable by tuning the catalyst through traditional substituent effects on the ligand.
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Affiliation(s)
| | - Joseph W Ziller
- Department of Chemistry , University of California , Irvine , 92697 , USA .
| | - Jenny Y Yang
- Department of Chemistry , University of California , Irvine , 92697 , USA .
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16
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Đokić M, Soo HS. Artificial photosynthesis by light absorption, charge separation, and multielectron catalysis. Chem Commun (Camb) 2018; 54:6554-6572. [DOI: 10.1039/c8cc02156b] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
We highlight recent novel approaches in the field of artificial photosynthesis. We emphasize the potential of a highly modular plug-and-play concept that we hope will persuade the community to explore a more inclusive variety of multielectron redox catalysis to complement the proton reduction and water oxidation half-reactions in traditional solar water splitting systems.
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Affiliation(s)
- Miloš Đokić
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore 637371
- Singapore
| | - Han Sen Soo
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore 637371
- Singapore
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17
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Wang J, Ganguly R, Yongxin L, Díaz J, Soo HS, García F. Synthesis and the Optical and Electrochemical Properties of Indium(III) Bis(arylimino)acenaphthene Complexes. Inorg Chem 2017; 56:7811-7820. [DOI: 10.1021/acs.inorgchem.7b00539] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Jingyi Wang
- Division of Chemistry
and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore
| | - Rakesh Ganguly
- Division of Chemistry
and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore
| | - Li Yongxin
- Division of Chemistry
and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore
| | - Jesus Díaz
- Departamento de
Química Orgánica e Inorgánica, Facultad de Veterinaria, Universidad de Extremadura, Cáceres 10071, Spain
| | - Han Sen Soo
- Division of Chemistry
and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore
- Singapore-Berkeley Research Initiative for Sustainable Energy (SinBeRISE), 1
Create Way, 138602 Singapore
- Solar Fuels Laboratory, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore
| | - Felipe García
- Division of Chemistry
and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore
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18
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Gazi S, Đokić M, Moeljadi AMP, Ganguly R, Hirao H, Soo HS. Kinetics and DFT Studies of Photoredox Carbon–Carbon Bond Cleavage Reactions by Molecular Vanadium Catalysts under Ambient Conditions. ACS Catal 2017. [DOI: 10.1021/acscatal.7b01036] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sarifuddin Gazi
- Division
of Chemistry and Biological Chemistry, School of Physical and Mathematical
Sciences, Nanyang Technological University, Singapore 637371
| | - Miloš Đokić
- Division
of Chemistry and Biological Chemistry, School of Physical and Mathematical
Sciences, Nanyang Technological University, Singapore 637371
| | - Adhitya Mangala Putra Moeljadi
- Division
of Chemistry and Biological Chemistry, School of Physical and Mathematical
Sciences, Nanyang Technological University, Singapore 637371
| | - Rakesh Ganguly
- Division
of Chemistry and Biological Chemistry, School of Physical and Mathematical
Sciences, Nanyang Technological University, Singapore 637371
| | - Hajime Hirao
- Division
of Chemistry and Biological Chemistry, School of Physical and Mathematical
Sciences, Nanyang Technological University, Singapore 637371
- Department
of Biology and Chemistry, City University of Hong Kong, Tat Chee
Avenue, Kowloon, Hong Kong
SAR, China
| | - Han Sen Soo
- Division
of Chemistry and Biological Chemistry, School of Physical and Mathematical
Sciences, Nanyang Technological University, Singapore 637371
- Solar
Fuels Laboratory, Nanyang Technological University, 50 Nanyang
Avenue, Singapore 639798
- Singapore-Berkeley Research Initiative for Sustainable Energy, 1 Create Way, Singapore 138602
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19
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Kuwamura N, Kurioka Y, Konno T. A platinum(ii)–palladium(ii)–nickel(ii) heterotrimetallic coordination polymer showing a cooperative effect on catalytic hydrogen evolution. Chem Commun (Camb) 2017; 53:846-849. [DOI: 10.1039/c6cc08789b] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Stepwise construction of a 1D heterotrimetallic coordination polymer containing all three group 10 metal ions and its heterogeneous catalytic activity for electrochemical hydrogen evolution are reported.
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Affiliation(s)
- Naoto Kuwamura
- Department of Chemistry
- Graduate School of Science
- Osaka University
- Osaka 560-0043
- Japan
| | - Yoshinari Kurioka
- Department of Chemistry
- Graduate School of Science
- Osaka University
- Osaka 560-0043
- Japan
| | - Takumi Konno
- Department of Chemistry
- Graduate School of Science
- Osaka University
- Osaka 560-0043
- Japan
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20
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Kee JW, Shao H, Kee CW, Lu Y, Soo HS, Tan CH. Mechanistic insights for the photoredox organocatalytic fluorination of aliphatic carbons by anthraquinone using time-resolved and DFT studies. Catal Sci Technol 2017. [DOI: 10.1039/c6cy02484j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Nanosecond TAS and DFT calculations reveal mechanistic insights for photoredox fluorination of aliphatic C–H bonds and evidence of an anthraquinone–Selectfluor® exciplex.
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Affiliation(s)
- J. W. Kee
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- 21 Nanyang Link
- Nanyang Technological University
- 637371 Singapore
| | - H. Shao
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- 21 Nanyang Link
- Nanyang Technological University
- 637371 Singapore
| | - C. W. Kee
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- 21 Nanyang Link
- Nanyang Technological University
- 637371 Singapore
| | - Y. Lu
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- 21 Nanyang Link
- Nanyang Technological University
- 637371 Singapore
| | - H. S. Soo
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- 21 Nanyang Link
- Nanyang Technological University
- 637371 Singapore
| | - C.-H. Tan
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- 21 Nanyang Link
- Nanyang Technological University
- 637371 Singapore
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21
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Koch F, Berkefeld A, Schubert H, Grauer C. Redox and Acid-Base Properties of Binuclear 4-Terphenyldithiophenolate Complexes of Nickel. Chemistry 2016; 22:14640-7. [DOI: 10.1002/chem.201603060] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Felix Koch
- Institut für Anorganische Chemie; Eberhard Karls Universität Tübingen; Auf der Morgenstelle 18 72076 Tübingen Germany
| | - Andreas Berkefeld
- Institut für Anorganische Chemie; Eberhard Karls Universität Tübingen; Auf der Morgenstelle 18 72076 Tübingen Germany
| | - Hartmut Schubert
- Institut für Anorganische Chemie; Eberhard Karls Universität Tübingen; Auf der Morgenstelle 18 72076 Tübingen Germany
| | - Claudius Grauer
- Institut für Anorganische Chemie; Eberhard Karls Universität Tübingen; Auf der Morgenstelle 18 72076 Tübingen Germany
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22
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Metal(II) Complexes of Compartmental Polynuclear Schiff Bases Containing Phenolate and Alkoxy Groups. CRYSTALS 2016. [DOI: 10.3390/cryst6080091] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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23
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Hong Z, Ong DY, Muduli SK, Too PC, Chan GH, Tnay YL, Chiba S, Nishiyama Y, Hirao H, Soo HS. Understanding the Origins of Nucleophilic Hydride Reactivity of a Sodium Hydride-Iodide Composite. Chemistry 2016; 22:7108-14. [PMID: 27038135 DOI: 10.1002/chem.201600340] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Indexed: 12/14/2022]
Abstract
Sodium hydride (NaH) has been commonly used as a Brønsted base in chemical syntheses, while it has rarely been employed to add hydride (H(-) ) to unsaturated electrophiles. We previously developed a procedure to activate NaH through the addition of a soluble iodide source and found that the new NaH-NaI composite can effect even stereoselective nucleophilic hydride reductions of nitriles, imines, and carbonyl compounds. In this work, we report that mixing NaH with NaI or LiI in tetrahydrofuran (THF) as a solvent provides a new inorganic composite, which consists of NaI interspersed with activated NaH, as revealed by powder X-ray diffraction, and both solid-state NMR and X-ray photoelectron spectroscopies. DFT calculations imply that this remarkably simple inorganic composite, which is comprised of NaH and NaI, gains nucleophilic hydridic character similar to covalent hydrides, resulting in unprecedented and unique hydride donor chemical reactivity.
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Affiliation(s)
- Zonghan Hong
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
| | - Derek Yiren Ong
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
| | - Subas Kumar Muduli
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore.,Energy Research Institute@NTU, Nanyang Technological University, Research Techno Plaza, Singapore, 637553, Singapore
| | - Pei Chui Too
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
| | - Guo Hao Chan
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
| | - Ya Lin Tnay
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
| | - Shunsuke Chiba
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore.
| | - Yusuke Nishiyama
- RIKEN CLST-JEOL Collaboration Center, Yokohama, Kanagawa 230-0045 (Japan). .,JEOL RESONANCE Inc. Akishima, Tokyo, 196-8558, Japan.
| | - Hajime Hirao
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore.
| | - Han Sen Soo
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore. .,Solar Fuels Laboratory, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 637553, Singapore. .,Singapore-Berkeley Research Initiative for Sustainable Energy (SinBeRISE), 1 Create Way, Singapore, 138602, Singapore.
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24
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Kee JW, Ng YY, Kulkarni SA, Muduli SK, Xu K, Ganguly R, Lu Y, Hirao H, Soo HS. Development of bis(arylimino)acenaphthene (BIAN) copper complexes as visible light harvesters for potential photovoltaic applications. Inorg Chem Front 2016. [DOI: 10.1039/c5qi00221d] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Readily synthesized, new bis(arylimino)acenaphthene copper(i) complexes exhibit panchromatic light absorption to the NIR region and function in dye-sensitized solar cells.
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Affiliation(s)
- J. W. Kee
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore 637371
| | - Y. Y. Ng
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore 637371
| | - S. A. Kulkarni
- Energy Research Institute@NTU (ERI@N)
- Nanyang Technological University
- Singapore 637553
| | - S. K. Muduli
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore 637371
- Energy Research Institute@NTU (ERI@N)
| | - K. Xu
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore 637371
| | - R. Ganguly
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore 637371
| | - Y. Lu
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore 637371
| | - H. Hirao
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore 637371
| | - H. S. Soo
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore 637371
- Singapore-Berkeley Research Initiative for Sustainable Energy (SinBeRISE)
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25
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Wang J, Ganguly R, Yongxin L, Díaz J, Soo HS, García F. A multi-step solvent-free mechanochemical route to indium(iii) complexes. Dalton Trans 2016; 45:7941-6. [DOI: 10.1039/c6dt00978f] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Indium complexes bearing bis(imino)acenaphthene (BIAN) ligands have been synthesized using “solvent-free”, facile mechanochemistry and can potentially be used as photosensitizers.
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Affiliation(s)
- Jingyi Wang
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- 21 Nanyang Link 637371
- Singapore
| | - Rakesh Ganguly
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- 21 Nanyang Link 637371
- Singapore
| | - Li Yongxin
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- 21 Nanyang Link 637371
- Singapore
| | - Jesus Díaz
- Departamento de Química Orgánica e Inorgánica
- Facultad de Veterinaria
- Cáceres 10071
- Spain
| | - Han Sen Soo
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- 21 Nanyang Link 637371
- Singapore
| | - Felipe García
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- 21 Nanyang Link 637371
- Singapore
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26
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Das SP, Ganguly R, Li Y, Soo HS. Nucleophilic reactivity and electrocatalytic reduction of halogenated organic compounds by nickel o-phenylenedioxamidate complexes. Dalton Trans 2016; 45:13556-64. [DOI: 10.1039/c6dt02349e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nickel(ii)-ate complexes supported by o-phenylenebis(N-methyloxamide) reacted with alkyl halides to form new imidate tautomers which were characterized by X-ray crystallography and FT-IR spectroscopy, and used for electroreduction of chloroform.
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Affiliation(s)
- Siva Prasad Das
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore
| | - Rakesh Ganguly
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore
| | - Yongxin Li
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore
| | - Han Sen Soo
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore
- Singapore-Berkeley Research Initiative for Sustainable Energy (SinBeRISE)
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