Humboldt-Universität zu Berlin - Mathematisch-Naturwissenschaftliche Fakultät - Arbeitsgruppe Ray


[2024] [2023] [2022] [2021] [2020] [2019] [2018] [2017] [2016] [2015] [2014] [2013] [2012] [2011] [2010] [2008] [2007] [2006] [2005] [2004] [2003]


  1. "Investigation of m- and p-xylene linked bimetallic Ni-cyclam-complexes as potential electrocatalysts for the CO2 reduction"
    S. Bimmermann, D. Siegmund, K. Ray, U.-P. Apfel, Mat. Tod. Cat. 2024, 6, 100058.
    DOI: 10.1016/j.mtcatav.2024.100058 toc science direct article.jpg
  2. "A Bioinspired Nonheme FeIII-(O22-)-CuII Complex with an St = 1 Ground State"
    D. Kass, S. Katz, H. Özgen, S. Mebs, M. Haumann, R. García-Serres, H. Dau, P. Hildebrandt, T. Lohmiller, K. Ray, J. Am. Chem. Soc. 2024.
    DOI: 10.1021/jacs.4c04492 toc dustin jacs 2024.jpeg
  3. "An Iminophosphinite Pincer Iridium Complex: Synthesis and Catalytic Tool for Alkane Transfer Dehydrogenations"
    J. Cardozo, O. He, W. Ma, K. Ray, T. Braun, Z. anorg. allg. Chem. 2024, e202400028.
    DOI: 10.1002/zaac.202400028 TOC zaac wanli.jpg
  4. "Origin of Unprecedented Formation and Reactivity of FeIV=O Species viaOxygen Activation: Role of Noncovalent Interactions and Magnetic Coupling"
    A. Sen, N. J. Britto, D. Kass, K. Ray, G. Rajaraman, Inorg. Chem. 2024.
    DOI: 10.1021/acs.inorgchem.4c00371 images_large_ic4c00371_0011.jpeg
  5. "Identification, Characterization, and Electronic Structures of Interconvertible Cobalt-Oxygen TAML intermediates"
    D. D. Malik, W. Ryu, Y. Kim, G. Singh, J.-H. Kim, M. Sankaralingam, Y.-M. Lee, M. S. Seo, M. Sundararajan, D. Ocampo, M. Roemelt, K. Park, S. H. Kim, M.-H. Baik, J. Shearer, K. Ray, S. Fukuzumi, W. Nam, J. Am. Chem. Soc. 2024146, 13817-13835.
    DOI: 10.1021/jacs.3c14346 images_large_ja3c14346_0016.jpeg
  6. "Long-Term Stability of Light-Induced Ti3+ Defects in TiO2 Nanotubes for Amplified Photoelectrochemical Water Splitting"
    E. Wierzbicka, E. Szaniawska-Bialas, T. Schultz, A. O. Basilio, D. Siemiaszko, K. Ray, N. Koch, N. Pinna, M. Polanski, ChemSusChem 2024, e202301614.
    DOI: 10.1002/cssc.202301614amanda toc collab ti.jpg
  7. "Trapping of a phenoxyl radical at a non-haem high-spin iron(II) centre"
    D. Kass, V. Larson, T. Corona, U. Kuhlmann, P. Hildebrandt, T. Lohmiller, E. Bill, N. Lehnert, K. Ray, Nat. Chem. 2024.
    DOI: 10.1038/s41557-023-01405-9TOC dustin nature.webp
  8. "A high-spin alkylperoxo-iron(III) complex with cis-anionic ligands: implications for the superoxide reductase mechanism"
    T. Devi, K. Dutta, J. Deutscher, S. Mebs, U. Kuhlmann, M. Haumann, B. Cula, H. Dau, P. Hildebrandt, K. Ray, Chem. Sci. 2024, 15, 528-533.
    DOI: 10.1039/D3SC05603tarali toc chem science.gif
  9. "How Ligand Geometry Affects the Reactivity ofCo(II) Cyclam Complexes"
    L. Iffland-Mühlhaus, B. Battistella, D. Siegmund, K. Ray, U.-P. Apfel, Eur. J. Inorg. Chem. 2023, 26, e202300418.
    DOI: 10.1002/ejic.202300418bea toc collab linda.jpg
  10. "Reactivities of iron(IV)-oxido compounds with pentadentate bispidine ligands"
    K. Bleher, P. Comba, D. Kass, K. Ray, H. Wadepohl, J. Inorg. Biochem. 2023, 241, 112123.
    DOI: 10.1016/j.jinorgbio.2023.112123TOC Dustin Fe 2023.jpg
  11. "A New Thiolate-Bound Dimanganese Cluster as a Structural and Functional Model for Class Ib RNRs"
    B. Battistella, T. Lohmiller, B. Cula, P. Hildebrandt, U. Kuhlmann, H. Dau, S. Mebs, K. Ray, Angew. Chem. Int. Ed. 202362, 202217076.
    DOI: 10.1002/anie.202217076TOC Bea Mangan.png
  12. "Spectroscopic Properties of a Biologically Relevant [Fe2(µ-O)2] Diamond Core Motif with a Short Iron-Iron Distance"
    D. Kass, S. Yao, K. Krause, T. Corona, L. Richter, T. Braun, S. Mebs, M. Haumann, H. Dau, T. Lohmiller, C. Limberg, M. Drieß, K. Ray, Angew. Chem. Int. Ed. 2023, 62, e202209437.
    DOI: 10.1002/anie.202209437Dustin Fe Angew Chem.jpeg
  13. "Evidence of Sulfur Non-Innocence in [CoII(dithiacyclam)]2+-Mediated Catalytic Oxygen Reduction Reactions"
    B. Battistella, L. Iffland-Mühlhaus, M. Schütze, B. Cula, U. Kuhlmann, H. Dau, P. Hildebrandt, T. Lohmiller, S. Mebs, U.-P. Apfel, K. Ray, Angew. Chem. Int. Ed. 2022, e202214074.
    DOI: 10.1002/anie.202214074Angew Chem Int Ed - 2022 - Battistella - Evidence of Sulfur Non‐Innocence in  CoII dithiacyclam  2 ‐Mediated Catalytic.jpg
  14. "Modelling the coordination environment in α-ketoglutarate dependent oxygenases - a comparative study on the effect of N- vs. O-ligation"
    K. Warm, D. Kass, M. Haumann, H. Dau, K. Ray, Z. Anorg. Allg. Chem. 2022, 648, e202100310.
    DOI: 10.1002/zaac.202100310TOC-FeMe2tacnO.png
  15. "The influence of secondary interactions on the [Ni(O2)]+ mediated aldehyde oxidation reactions"
    B. Battistella, K. Warm, B. Cula, B. Lu, P. Hildebrandt, U. Kuhlmann, H. Dau, S. Mebs, K. Ray, J. Inorg. Biochem. 2022, 227, 111668.
    DOI: 10.1016/j.jinorgbio.2021.111668

    Bea NiO2.jpg
  16. "Formation of cobalt-oxygen intermediates by dioxygen activation at a mononuclear nonheme cobalt(II) center"
    D. D. Malik, A. Chandra, M. S. Seo, Y.-M. Lee, E. R. Farquhar, S. Mebs, H. Dau, K. Ray, W. Nam, Dalton Trans. 2021, 50, 11889-11898.
    DOI: 10.1039/D1DT01996A
    Formation of cobalt–oxygen intermediates by.jpeg
  17. "Spectroscopic Characterization of a reactive [Cu2(µ-OH)2] intermediate in Cu/TEMPO catalyzed aerobic alcohol oxidation reaction"
    K. Warm, G. Tripodi, E. Andris, S. Mebs, U. Kuhlmann, H. Dau, P. Hildebrandt, J. Roithová, K. Ray, Angew. Chem. Int. Ed. 2021, 60, 23018-23024.
    DOI: 10.1002/anie.202108442
    Spectroscopic Characterization of a reactive [Cu2(µ-OH)2] intermediate in CuTEMPO catalyzed aerobic alcohol oxidation reaction.tif
  18. "Stable, but still reactive - investigations on the effects of Lewis acid binding on copper nitrene intermediates"
    K. Warm, I. Monte-Pérez, U. Kuhlmann, P. Hildebrandt, E. Farquhar, M. Swart, K. Ray, Z. Anorg. Allg. Chem. 2021, 647, 1495-1502.
    DOI: 10.1002/zaac.202100092
    katrin zaac.jpeg
  19. "Ligand Constraint Induced Peroxide Activation for Electrophilic Reactivity"
    A. Chandra, M. Ansari, I. Monte-Pérez, S. Kundu, G. Rajaraman, K. Ray, Angew. Chem. Int. Ed. 2021, 60, 14954-14959.
    DOI: 10.1002/anie.202100438
    chanra 2021.png
  20. "Transition metal-mediated O-O bond formation and activation in chemistry and biology"
    X.-P. Zhang, A. Chandra, Y.-M. Lee, R. Cao, K. Ray, W. Nam, Chem. Soc. Rev. 2021, 50, 4804-4811.
    DOI: 10.1039/D0CS01456G
    transition metal-mediated o-o bon formation and activation in chemistry and biology.gif
  21. "A Bioinspired Oxoiron(IV) Motif Supported on a N2S2 Macrocyclic Ligand"
    J. Deutscher, P. Gerschel, K. Warm, U. Kuhlmann, S. Mebs, M. Haumann, H. Dau, P. Hildebrandt, U.-P. Apfel, K. Ray, Chem. Comm. 2021, 57, 2947-2950.
    DOI: 10.1039/D1CC00250C
    a bioinspired oxoiron motiv supported on a n2s2 macrocyclic ligand.gif
  22. "A Pseudotetrahedral Terminal Oxoiron(IV) Complex: Mechanistic Promiscuity in C-H bond Oxidation Reactions"
    K. Warm, A. Paskin, U. Kuhlmann, E. Bill, M. Swart, M. Haumann, H. Dau, P. Hildebrandt, K. Ray, Angew. Chem. Int. Ed. 2021, 60, 6752-6756.
    DOI: 10.1002/anie.202015896a pseudotetrahedral terminal oxoiron complex, mech promiscuity in ch bond oxidation reactions.jpg
  23. "Synthesis, Characterization, and Reactivity of a Series of Homo- and Hetero-dinuclear Complexes based on an Asymmetric FloH Ligand System"
    B. Battistella, F. Heims, B. Cula, K. Ray, Z. Anorg. Allg. Chem. 2020, 646, 1010-1019.
    DOI: 10.1002/zaac.202000221
  24. "Redox Potentials of High-Valent Iron-, Cobalt-, and Nickel-Oxido Complexes: Evidence for Exchange Enhanced Reactivity"
    P. Comba, A.-M. Löhr, F. Pfaff, K. Ray, Israel J. Chem. 2020, 60, 957-962.
    DOI: 10.1002/ijch.202000038
  25. "Iron and manganese oxo complexes, the oxo wall and beyond"
    V. A. Larson, B. Battistella, K. Ray, N. Lehnert, W. Nam, Nature Rev. Chem. 2020, 4, 404-419.
    DOI: 10.1038/s41570-020-0197-9
  26. "Electrochemical CO2 Reduction - The Effect of Chalcogenide Exchange in Ni-Isocyclam Complexes"
    P. Gerschel, B. Battistella, D. Siegmund, K. Ray, U. P. Apfel, Organometall. 2020, 39, 1497-1510.
    DOI: 10.1021/acs.organomet.0c00129
  27. "Catalytic dioxygen reduction mediated by a tetranuclear cobalt complex supported on a stannoxane core"
    A. Chandra, S. Mebs, S. Kundu, U. Kuhlmann, P. Hildebrandt, H. Dau, K. Ray, Dalton Trans. 2020, 49, 6065-6073.
    DOI: 10.1039/d0dt00475h
  28. "O2 and H2O2 activations at dinuclear Mn and Fe active sites"
    B. Battistella, K. Ray, Coord. Chem. Rev. 2020, 408, 213176.
    DOI: 10.1016/j.ccr.2019.213176
  29. "Stoichiometric Formation of an Oxoiron(IV) Complex by a Soluble Methane Monooxygenase Type Activation of O2 at an Iron(II)-Cyclam Center"
    D. Kass, T. Corona, K. Warm, B. Braun-Cula, U. Kuhlmann, E. Bill, S. Mebs, M. Swart, H. Dau, M. Haumann, P. Hildebrandt, K. Ray, J. Am. Chem. Soc. 2020, 142, 5924-5928.
    DOI: 10.1021/jacs.9b13756
  30. "Trapping of a Highly Reactive Oxoiron(IV) Complex in the Catalytic Epoxidation of Olefins by Hydrogen Peroxide"
    X. Engelmann, D. D. Malik, T. Corona, K. Warm, E. R. Farquhar, M. Swart, W. Nam, K. Ray, Angew. Chem. Int. Ed. 2019, 131, 4052-4056.
    DOI: 10.1002/anie.201812758
  31. "Sulfur substitution in a Ni(cyclam) derivative results in lower overpotential for CO2 reduction and enhanced proton reduction"
    P. Gerschel, K. Warm, E. R. Farquhar, U. Englert, M. L. Reback, D. Siegmund, K. Ray, U.-P. Apfel, Dalton Trans. 2019, 48, 5923-5932.
    DOI: 10.1039/c8dt04740e
  32. "Heme and Nonheme High-Valent Iron and Manganese Oxo Cores in Biological and Abiological Oxidation Reactions"
    M. Guo, T. Corona, K. Ray, W. Nam, ACS Cent. Scie. 2019, 5, 13-28.
    DOI: 10.1021/acscentsci.8b00698
  33. "Water Oxidation Reaction Mediated by an Octanuclear Iron-Oxo Cluster"
    J. Deutscher, T. Corona, K. Warm, X. Engelmann, S. Sobottka, B. Braun-Cula, B. Sarkar, K. Ray, Eur. J. Inorg. Chem. 2018, 45, 4925–4929.
    DOI: 10.1002/ejic.201800269
  34. "Structure, bonding, reactivity and spectral features of putative NiIII=O species: a theoretical perspective"
    B. Pandey, K. Ray, G. Rajaraman, Z. Anorg. Allg. Chem. 2018, 644, 790-800.
    DOI: 10.1002/zaac.201800122
  35. "Observation of Carbodicarbene Ligand Redox Noninnocence in Highly Oxidized Iron Complexes"
    S. C. Chan, P. Gupta, X. Engelmann, Z. Z. Ang, R. Ganguly, E. Bill, K. Ray, S. Ye, J. England, Angew. Chem. Int. Ed. 2018, 57, 1-7.
    DOI: 10.1002/anie.201809158
  36. "Four-electron reduction of dioxygen to water by a trinuclear copper complex"
    X. Engelmann, E. R. Farquhar, J. England, K. Ray, Inorg. Chem. Acta 2018, 481, 159-165.
    DOI: 10.1016/j.ica.2017.11.014
  37. "Nucleophilic vs. Electrophilic Reactivity of Bioinspired Superoxido Nickel(II) Complexes"
    C. Panda, A. Chandra, T. Corona, E. Andris, B. Pandey, S. Garai, N. Lindenmaier, S. Kuenstner, E. R. Farquhar, J. Roithova, G. Rajaraman, M. Driess, K. Ray, Angew. Chem. Int. Ed. 2018, 57, 14883-14887.
    DOI: 10.1002/anie.201808085
  38. "C-H activation and nucleophilic substitution in a photochemically generated high valent iron complex"
    J. Hui Lim, X. Engelmann, S. Corby, R. Ganguly, K. Ray, H. S. Soo, Chem. Sci. 2018, 9, 3992-4002.
    DOI: 10.1039/C7SC05378A
  39. "A Highly Reactive Oxoiron(IV) Complex Supported by a Bioinspired N3O Macrocyclic Ligand"
    I. Monte-Pérez, X. Engelmann, Y.-M. Lee, M. Yoo, K. Elumalai, E. R. Farquhar, E. Bill, J. England, W. Nam, M. Swart, K. Ray, Angew. Chem. Int. Ed. 2017, 56, 14384-14388.
    DOI: 10.1002/anie.201707872
  40. "Temperature Dependence of the Catalytic Two- versus Four Electron Reduction of Dioxygen by a Hexanuclear Cobalt Complex"
    I. Monte-Pérez, S. Kundu, A. Chandra, K. E. Craigo, P. Chernev, U. Kuhlmann, H. Dau, P. Hildebrandt, C. Greco, C. Van Stappen, N. Lehnert, K. Ray, J. Am. Chem. Soc. 2017, 139, 15033-15042.
    DOI: 10.1021/jacs.7b07127
  41. "A High-Valent Non-Heme μ-Oxo Manganese(IV) Dimer Generated from a Thiolate-Bound Manganese(II) Complex and Dioxygen"
    D. Brazzolotto, F. G. Cantú Reinhard, J. Smith-Jones, M. Retegan, L. Amidani, A. S. Faponle, K. Ray, C. Philouze, S. P. de Visser, M. Gennari, C. Duboc, Angew. Chem. Int. Ed. 2017, 56, 8211-8215.
    DOI: 10.1002/ange.201703215
  42. "Synthesis and reactivity of a mononuclear non-haem cobalt(IV)-oxo complex"
    B. Wang, Y.-M. Lee, W.-Y. Tcho, S. Tussupbayev, S.-T. Kim, Y. Kim, M. S. Seo, K.-B. Cho, Y. Dede, B. C. Keegan, T. Ogura, S. H. Kim, T. Ohta, M.-H. Baik, K. Ray, J. Shearer, W. Nam, Nat. Commun. 2017, 8, 14839.
    DOI: 10.1038/ncomms14839
  43. "A New Domain of Reactivity for High-Valent Dinuclear [M(µ-O2M'] Complexes in Oxidation Reactions"
    X. Engelmann, S. Yao, E. R. Farquhar, T. Szilvási, U. Kuhlmann, P. Hildebrandt, M. Driess, K. Ray, Angew. Chem. 2017, 56, 303-307.
    DOI: 10.1002/anie.201607611
  44. "Characterization and reactivity studies of a terminal copper-nitrene species"
    T. Corona, L. Ribas, M. Rovira, E. R. Farquhar, X. Ribas, K. Ray, A. Company, Angew. Chem. Int. Ed. 2016, 55, 14005-14008.
    DOI: 10.1002/anie.201607238
  45. "A cobalt(II) iminoiodane complex and its scandium adduct: mechanistic promiscuity in hydrogen atom abstraction reactions"
    S. Kundu, P. Chernev, X. Engelmann, C. S. Chung, H. Dau, E. Bill, J. England, W. Nam, K. Ray, Dalton Trans. 2016, 45, 14538-14543.
    DOI: 10.1039/C6DT01815G
  46. "Changing the chemical and physical properties of high valent heterobimetallic bis-(μ-oxido) Cu-Ni complexes by ligand effects"
    M.-C. Kafentzi, M. Orio, M. Reglier, S. Yao, U. Kuhlmann, P. Hildebrandt, M. Driess, A. J. Simaan, K. Ray, Dalton Trans. 2016, 45, 15994-16000.
    DOI: 10.1039/C6DT02391F
  47. "Dioxygen activation chemistry by synthetic mononuclear nonheme iron, copper and chromium complexes"
    S. Hong, Y.-M. Lee, K. Ray, W. Nam, Coord. Chem. Rev. 2016, 334, 25-42.
    DOI: 10.1016/j.ccr.2016.07.006
  48. "An iron(II) hydride complex of a ligand with two adjacent β-diketiminate binding sites and its reactivity"
    H. Gehring, R. Metzinger, B. Braun, C. Herwig, S. Harder, K. Ray, C. Limberg, Dalton Trans. 2016, 45, 2989-2996.
    DOI: 10.1039/C5DT04266F
  49. "Oxidation Reactions with Bioinspired Mononuclear Non-Heme Metal-Oxo Complexes"X. Engelmann, I. Monte-Pérez, K. Ray, Angew. Chem. Int. Ed. 2016, 55, 7632-7649.
    DOI: 10.1002/anie.201600507
  50. "High-Valent Metal-Oxo Intermediates in Energy Demanding Processes: From Dioxygen Reduction to Water Splitting"
    F. Heims, K. Ray, M. Schwalbe, W. Nam, Curr. Opin. Chem. Biol. 2015, 25, 159-171.
    DOI: 10.1016/j.cbpa.2015.01.014
  51. "An Open-Shell Spin Singlet Copper-Nitrene Intermediate Binding Redox-innocent Metal Ions: Influence of the Lewis Acidity of the Metal Ions on Spectroscopic and Reactivity Properties"
    I. M.-Pérez, S. Kundu, K. Ray, Z. Anorg. Allg. Chem. 2015, 641, 78–82.
    DOI: 10.1002/zaac.201400389
  52. "Characterization of Porphyrin-Co(III)-‘Nitrene radical’ species relevant in catalytic nitrene transfer reactions"
    M. Goswami, V. Lyaskovskyy, S. R. Domingos, W. J. Buma, S. Woutersen, O. Troeppner, I. I-Burmazović, H. Lu, X. Cui, P. Zhang, E. J. Reijerse, S. DeBeer, M. M. van Schooneveld, F. Pfaff, K. Ray, B. de Bruin, J. Am. Chem. Soc. 2015, 137, 5468–5479.
    DOI: 10.1021/jacs.5b01197
  53. "Reactivity of a Nickel(II) Bis(amidate) Complex with meta-Chloroperbenzoic Acid: Formation of a Potent Oxidizing Species"
    T. Corona, F. F. Pfaff, F. Acuña-Parés, A. Draksharapu, C. J. Whiteoak, V. Martin-Diaconescu, J. L-Fillol, W. R. Browne, K. Ray, A. Company, Chem. Eur. J. 2015, 21, 15029-15038.
    DOI: 10.1002/chem.201501841
  54. "[Ni(cod)2][Al(ORF)4], a Source for Naked Nickel(I) Chemistry"
    M. Schwab, D. Himmel, S. Kacprzak, D. Kratzert, V. Radtke, M. Wernet, P. Weis, K. Ray, E. W. Scheidt, W. Scherer, B. de Bruin, T. Augenstein, F. Breher, S. Weber, I. Krossing, Angew. Chem. Int. Ed. 2015, 54, 14706-14709.
    DOI: 10.1002/anie.201506475
  55. "Spectroscopic Capture and Reactivity of a Low-Spin Cobalt(IV)-Oxo Complex Stabilized by Binding Redox-Inactive Metal Ions"
    S. Hong, F. F. Pfaff, E. Kwon, Y. Wang, M.-S. Seo, E. Bill, K. Ray, W. Nam, Angew. Chem. Int. Ed. 2014, 53, 10403-1407.
    DOI: 10.1002/ange.201701623
  56. "Evidence of Two-State Reactivity in Alkane Hydroxylation by Lewis-acid Bound Copper-Nitrene Complexes"
    S.-L. Abram, I. Monte-Pérez, F. F. Pfaff, E. Farquhar, K. Ray, Chem. Commun. 2014, 50, 9852-9854.
    DOI: 10.1039/C4CC03754E
  57. "Status of Reactive Non-Heme Metal-Oxygen Intermediates in Chemical and Enzymatic Reactions"
    K. Ray, F. F. Pfaff, B. Wang, W. Nam, J. Am. Chem. Soc. 2014, 136, 13942-13958.
    DOI: 10.1021/ja507807v
  58. "Redox Non-Innocence of a N-Heterocyclic Nitrenium Cation Bound to a Nickel–Cyclam Core"
    F. Heims, F. F. Pfaff, S.-L. Abram, E. R. Farquhar, M. Bruschi, C. Greco, K. Ray, J. Am. Chem. Soc. 2014, 136, 582-585.
    DOI: 10.1021/ja4099559
  59. "Mechanism of phenol oxidation by heterodinuclear Ni Cu bis(µ-oxo) complexes involving nucleophilic oxo groups"
    S. Kundu, E. Miceli, E. R. Farquharb, K. Ray, Dalton Trans. 2014, 43, 4264-4267.
    DOI: 10.1039/C3DT52644E
  60. "Access to a CuII–O–CuII Motif: Spectroscopic Properties, Solution Structure, and Reactivity"
    P. Haack, A. Kärgel, C. Greco, J. Dokic, B. Braun, F. F. Pfaff, S. Mebs, K. Ray, C. Limberg, J. Am. Chem. Soc. 2013, 135, 16148-16160.
    DOI: 10.1021/ja406721a
  61. "A High-Valent Heterobimetallic [CuIII(μ-O)2NiIII]2+ Core with Nucleophilic Oxo Groups"
    S. Kundu, F. F. Pfaff, E. Miceli, I. Zaharieva, C. Herwig, S. Yao, E. R. Farquhar, U. Kuhlmann, E. Bill, P. Hildebrandt, M. Driess, C. Limberg, K. Ray, Angew. Chem. Int. Ed. 2013, 52, 5622-5626.
    DOI: 10.1002/anie.201300861
  62. "Terminal oxo and imido transition metal complexes of Groups 9-11"
    K. Ray, F. Heims, F. F. Pfaff, Eur. J. Inorg. Chem. 2013, 2013, 3784-3807.
    DOI: 10.1002/ejic.201300223
  63. "Nonheme oxoiron(IV) complexes of pentadentate N5 ligands: spectroscopy, electrochemistry, and oxidative reactivity"
    D. Wang, K. Ray, M. J. Collins, E. R. Farquhar, J. R. Frisch, L. Gomez, T. A. Jackson, M. Kerscher, A. Waleska, P. Comba, M. Costas, L. Que Jr., Chem. Sci. 2013, 4, 282-291.
    DOI: 10.1039/C2SC21318D
  64. "Lewis-acid Trapping of an Elusive Copper-Tosylnitrene Intermediate Using Scandium Triflate"
    S. Kundu, E. Miceli, E. Farquhar, F. F. Pfaff, U. Kuhlmann, P. Hildebrandt, B. Braun, C. Greco, K. Ray, J. Am. Chem. Soc. 2012, 134, 14710-14713.
    DOI: 10.1021/ja306674h
  65. "Metal-oxo-mediated O-O bond formation reactions in chemistry and biology"
    S. Kundu, M. Schwalbe, K. Ray, BioInorg. React. Mech. 2012, 8, 41-57.
    DOI: 10.1515/irm-2012-0004
  66. "Synthesis and Spectroscopic Characterisation of a Heterodinuclear Iron(III)-Copper(II) Complex Based on an Asymmetric Dinucleating Ligand System"
    F. Heims, V. Mereacre, A. Ciancetta, S. Mebs, A. K. Powell, C. Greco, K. Ray, Eur. J. Inorg. Chem. 2012, 29, 4565-4569.
    DOI: 10.1002/ejic.201200156
  67. "The biology and chemistry of high-valent iron–oxo and iron–nitrido complexes"
    J. Hohenberger, K. Ray, K. Meyer, Nature Commun. 2012, 3, 720.
    DOI: 10.1038/ncomms1718
  68. "Spectroscopic capture and reactivity of S = 1/2 nickel(III)–oxygen intermediates in the reaction of a NiII-salt with mCPBA"
    F. F. Pfaff , F. Heims , S. Kundu , S. Mebs, K. Ray, Chem. Commun. 2012, 48, 3730-3732.
    DOI: 10.1039/C2CC30716B
  69. "O-O Bond Formation Mediated by a Hexanuclear Iron Complex Supported on a Stannoxane Core"
    S. Kundu, E. Matito, S. Walleck, F. F. Pfaff, F. Heims, B. Rábay, J. M. Luis, A. Company, B. Braun, T. Glaser, K. Ray, Chem. Eur. J. 2012, 10, 2787-2791.
    DOI: 10.1002/chem.201102326
  70. "An Oxocobalt(IV) Complex Stabilized by Lewis Acid Interactions with Scandium(III) Ions"
    F. F. Pfaff, S. Kundu, M. Risch, S. Pandian, F. Heims, I. Pryjomska-Ray, P. Haack, R. Metzinger, E. Bill, H. Dau, P. Comba, K. Ray, Angew. Chem. Int. Ed. 2011, 7, 1711-1715.
    DOI: 10.1002/anie.201005869
  71. "Dinuclear Copper Complexes Based on Parallel ß-Diiminato Binding Sites and their Reactions with O2: Evidence for a Cu-O-Cu Entity"
    P. Haack, C. Limberg, K. Ray, B. Braun, U. Kuhlmann, P. Hildebrandt, C. Herwig, Inorg. Chem. 2011, 6, 2133-2142.
    DOI: 10.1021/ic101249k
  72. "Dioxygenase-Like Reactivity of an Isolable Superoxo-Nickel(II) Complex"
    A. Company, S. Yao, K. Ray, M. Driess, Chem. Eur. J. 2010, 16, 9669-9675.
    DOI: 10.1002/chem.201001138
  73. "Determination by High-Frequency and -Field EPR of Zero-Field Splitting in Iron(IV) Oxo Complexes: Implications for Intermediates in Nonheme Iron Enzymes"
    J. Krzystek, J. England, K. Ray, A. Ozarowski, D. Smirnov, L. Que Jr., J. Telser, Inorg. Chem. 2008, 47, 3483-3485.
    DOI: 10.1021/ic800411c
  74. "An Inverted and More Oxidizing Isomer of [FeIV(O)(TMC)(NCCH3)]2+"
    K. Ray, J. England, M. Martinho, E. Munck, L. Que Jr., Angew. Chem. 2008, 120, 8188-8191.
    DOI: 10.1002/ange.200802219
  75. "Iron-Oxidation-State Dependent O-O bond cleavage in meta-chloroperbenzoic acid to form an oxoiron(IV) complex"
    K. Ray, S. M. Lee, L. Que Jr., Inorg. Chim. Acta 2008, 361, 1066-1069.
    DOI: 10.1016/j.ica.2007.07.039
  76. "Description of the Ground-State Covalencies of the Bis(dithiolato) Transition-Metal Complexes from X-ray Absorption Spectroscopy and Time-Dependent Density-Functional Calculations"
    K. Ray, S. D. George, E. I. Solomon, K. Wieghardt, F. Neese, Chem. Eur. J. 2007, 13, 2783-2797.
    DOI: 10.1002/chem.200601425
  77. "Molecular and Electronic Structure of Square-Planar Gold Complexes Containing Two 1,2-Di(4-tert-butylphenyl)ethylene-1,2-dithiolato Ligands: [Au(2L)2]1+/0/1-/2-. A Combined Experimental and Computational Study"
    S. Kokatam, K. Ray, J. Pap, E. Bill, W. E. Geiger, R. J. LeSuer, P. H. Rieger, T. Weyhermüller, F. Neese, K. Wieghardt, Inorg. Chem. 2007, 46, 1100-1111.
    DOI: 10.1021/ic061181u
  78. "Axial Ligand Tuning of a Nonheme Iron(IV)-Oxo Unit for Hydrogen Atom Abstraction"
    C. V. Sastri, J. Lee, K. Oh, Y. J. Lee, J. Lee, T. A. Jackson, K. Ray, H. Hirao, W. Shin, J. A. Halfen, L. Que Jr., S. Shaik, W. Nam, Proc. Natl. Acad. Sc. 2007, 104, 19181-19186.
    DOI: 10.1073/pnas.0709471104
  79. "Joint Spectroscopic and Theoretical Investigations of Transition Metal Complexes Involving Non-innocent ligands"
    K. Ray, T. Petrenko, K. Wieghardt, F. Neese, Dalton Trans. 2007, 16, 1552-1566.
    DOI: 10.1039/B700096K
  80. "Electrochemical Generation of a Nonheme Oxoiron(IV) Complex"
    M. J. Collins, K. Ray, L. Que Jr., Inorg. Chem. 2006, 45, 8009-8011.
    DOI: 10.1021/ic061263i
  81. "Vibrational Markers for the Open-Shell Character of Transition Metal Bis-dithiolenes: An Infrared, Resonance Raman, and Quantum Chemical Study"
    T. Petrenko, K. Ray, K. Wieghardt, F. Neese, J. Am. Chem. Soc. 2006, 128, 4422-4436.
    DOI: 10.1021/ja0578451
  82. "Molecular and Electronic Structures of Oxo-bis(benzene-1,2-dithiolato)chromate(V) Monoanions. A Combined Experimental and Density Functional Study"
    R. Kapre, K. Ray, I. Sylvestre, T. Weyhermüller, S. D. George, F. Neese, K. Wieghardt, Inorg. Chem. 2006, 45, 3499-3509.
    DOI: 10.1021/ic051844s
  83. "A Lipophilic Hexaporphyrin Assembly Supported on a Stannoxane Core"
    V. Chandrasekhar, S. Nagendran, R. Azhakar, M. R. Kumar, A. Srinivasan, K. Ray, T. K. Chandrashekar, C. Madhavaiah, S. Verma, U. D. Priyakumar, G. N. Sastry, J. Am. Chem. Soc. 2005, 127, 2410-2411.
    DOI: 10.1021/ja043748g
  84. "Electronic Structure of Square Planar Bis(benzene-1,2-dithiolato)metal Complexes [M(L)2]z (z = 2-, 1-, 0; M = Ni, Pd, Pt, Cu, Au): An Experimental, Density Functional, and Correlated ab initio Study"
    K. Ray, T. Weyhermüller, F. Neese, K. Wieghardt, Inorg. Chem. 2005, 44, 5345-5360.
    DOI: 10.1021/ic0507565
  85. "Redox-Noninnocence of the S,S'-Coordinated Ligands in Bis(benzene-1,2-dithiolato)iron Complexes"
    K. Ray, E. Bill, T. Weyhermüller, K. Wieghardt, J. Am. Chem. Soc. 2005, 127, 5641-5654.
    DOI: 10.1021/ja040237l
  86. "The Electronic Structure of the Isoelectronic, Square Planar Complexes, [FeII(L)2]2- and [CoIII(LBu)2]- (L2- and (LBu)2- = benzene-1,2-dithiolates): An Experimental and Density Functional Theoretical Study"
    K. Ray, A. Begum, T. Weyhermüller, S. Piligkos, J. van Slageren, F. Neese, K. Wieghardt, J. Am. Chem. Soc. 2005, 127, 4403-4415.
    DOI: 10.1021/ja042803i
  87. "Molecular and Electronic Structure of Four- and Five- Coordinate Cobalt Complexes Containing Two o-Phenylenediamine- or two o-Aminophenol-Type Ligands at Various Oxidation Levels: An Experimental, Density Functional, and Correlated ab initio Study"
    E. Bill, E. Bothe, P. Chaudhuri, K. Chlopek, D. Herebian, S. Kokatam, K. Ray, T. Weyhermüller, F. Neese, K. Wieghardt, Chem. Eur. J. 2004, 11, 204-224.
    DOI: 10.1002/chem.200400850
  88. "Do S,S'–Coordinated o-dithiobenzosemiquinonate(1-) Radicals Exist in Coordination Compounds? The [AuIII(1,2-C6H4S2)2]1-/0 Couple"
    K. Ray, T. Weyhermüller, A. Goossens, M. W. J. Crajé, K. Wieghardt, Inorg. Chem. 2003, 42, 4082-4087.
    DOI: 10.1021/ic0207092