Publications
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RESEARCH @ UVA
74. Isolation and Reactivity of Carbene-Stabilized Carbon Disulfide Radical Anions
72. Developing Homogeneous First Row Early Transition Metal Catalysts for the Oxygen Reduction Reaction
McCormick, M.J.; Machan C.W.* Dalton Trans. 2024, DOI: 10.1039/D4DT01969E
71. Acid Strength Effects on Dimerization During Metal-Free Catalytic Dioxygen Reduction
70. Pre-Equilibrium Reactions Involving Pendent Relays Improve CO2 Reduction Mediated by Molecular Cr-based Electrocatalysts
Moberg, M.E.; Reid, A.G.; Dickie, D.A.; Machan, C.W.* Dalton Trans. 2024 DOI: 10.1039/D4DT01981D
69. Design of Cr-Based Molecular Electrocatalyst Systems for the CO2 Reduction Reaction
Moberg, M.E.; Machan, C.W.* Acc. Chem. Res. 2024 DOI: 10.1021/acs.accounts.4c00283
68. Exploring the Role of Polymer Interactions During Water Electrolysis Under Basic Conditions with Bifunctional Cobalt Corroles
Sahoo, S.; Johnson, E.K.; Wei, X.; Zhang, S.; Machan, C.W.* Energy Adv. 2024 DOI: 10.1039/D4YA00257A
67. Expanding the Design Space of Polymer–Metal Organic Framework (MOF) Gels by Understanding Polymer–MOF Interactions
Verma, P.; Bannon, M.S.; Kuenen, M.K.; Ray, S.; Dhakal, A.; Stone, K.; Nichols, A.W.; Machan, C.W.; Colón, Y.J.; Letteri, R.A.; Guarav, G. Chem. Mater. 2024 DOI: 10.1021/acs.chemmater.4c00112.
66. Improving Co-Electrocatalytic Carbon Dioxide Reduction by Optimizing the Relative Potentials of the Redox Mediator and Catalyst
Reid, A.G.; Zelenke, E.A.; Moberg, M.E.; Dickie, D.A.; Machan, C.W.* Chem. Commun. 2024 DOI: 10.1039/D4CC01988A. ** Inside Cover
65. Metal-Free Homogeneous O2 Reduction by an Iminium-Based Electrocatalyst
Cook, E.N.; Davis, A.E.; Hilinski, M.K.*; Machan, C.W.* J. Am. Chem. Soc. 2024, DOI: 10.1021/jacs.3c14549.
64. Controlling Product Selectivity During Dioxygen Reduction with Mn Complexes Using Pendent Proton Donor Relays and Added Base
Cook, E.N.; Coulter, I.M.; Dickie, D.A.; Machan, C.W.* Chem. Sci. 2024, DOI: 10.1039/D3SC02611F.
63. Photoluminescence Switching in Quantum Dots Connected with Fluorinated and Hydrogenated Photochromic Molecules
Sarabamoun, E.S.; Bietch, J.M.; Aryal, P.; Reid, A.G.; Curran, M.; Johnson, G.; Tsai, E.H.R.; Machan, C.W.; Wang, G.; Choi, J. RSC Adv. 2024, DOI: 10.1039/D3RA07539G.
62. Solution Shearing of Zirconium (Zr)-Based Metal–Organic Frameworks NU-901 and MOF-525 Thin Films for Electrocatalytic Reduction Applications
Verma, P.K.; Koellner, C.A.; Hall, H.; Phister, M.R.; Stone, K.H.; Nichols, A.W.; Dhakal, A.; Ashcraft, E.; Machan, C.W.; Giri, G.* ACS Appl. Mater. Interfaces 2023, DOI: 10.1021/acsami.3c12011
61. Sterically Attenuated Electronic Communication in Cobalt Complexes of Meridional Isoquinoline-Derived Ligands for Applications in Electrocatalysis
Reid, A.G.; Moberg, M.E.; Koellner, C.A.; Machan, C.W.*; Thornton, D.A.; Dickenson, J.C.; Stober, J.J.; Turner, D.A.; Tarring, T.J.; Brown, C.A.; Harrison, D.P.* J. Chem. Phys. 2023, DOI: 10.1063/5.0174177
60. Co-Electrocatalytic CO2 Reduction Mediated by a Dibenzophosphole Oxide and a Chromium Complex
Koellner, C.A.; Reid, A.G.; Machan, C.W.* Chem. Commun. 2023 DOI: 10.1039/D3CC00166K
59. Comparisons of bpy and phen Ligand Backbones in Cr-Mediated (Co-)Electrocatalytic CO2 Reduction
Reid, A.G.; Moberg, M.E.; Koellner, C.A.; Moreno, J.J.; Hooe, S.L.; Baugh, K.R.; Dickie, D.A.; Machan, C.W.* Organometallics 2023 DOI: 10.1021/acs.organomet.2c00600
58. Redox Mediators in Homogeneous Co-Electrocatalysis
Reid, A.G. and Machan, C.W. J. Am. Chem. Soc. 2023 DOI: 10.1021/jacs.2c10033
57. Electrocatalytic Hydrogen Evolution Reaction by a Ni(N2O2) Complex Based on 2,2′-bipyridine
Dressel, J.M.; Cook, E.N.; Hooe, S.L.; Moreno, J.J.; Dickie, D.A.; Machan, C.W. Inorg. Chem. Front. 2023 DOI: 10.1039/D2QI01928K
*Frontiers Emerging Investigator Series
56. Homogeneous Electrocatalytic Reduction of CO2 by a CrN3O Complex: Electronic Coupling with a Redox-Active Terpyridine Fragment Favors Selectivity for CO
Reid, A.G.; Hooe, S.L.; Moreno, J.J.; Dickie, D.A.; Machan, C.W.* Inorg. Chem. 2022 DOI: 10.1021/acs.inorgchem.2c02013
55. Homogeneous Catalysis of Dioxygen Reduction by Molecular Mn Complexes
Cook, E.N.; Machan, C.W.* Chem. Commun. 2022 DOI: 10.1039/D2CC04628H
54. Inverse Potential Scaling in Co-Electrocatalytic Activity for CO2 Reduction Through Redox Mediator Tuning and Catalyst Design
Reid, A.G.; Moreno, J.J.; Hooe, S.L.; Baugh, K.R.; Thomas, I.H.; Dickie, D.A.; Machan, C.W.* Chem. Sci. 2022 DOI: 10.1039/D2SC03258A
53. Homogeneous Catalytic Reduction of O2 to H2O by a Terpyridine-Based FeN3O Complex
Cook, E.N.; Hooe, S.L.; Dickie, D.A.; Machan, C.W.* Inorg. Chem. 2022 DOI: 10.1021/acs.inorgchem.2c00524
**Featured Article
52. Bioinspired Mononuclear Mn Complexes for O2 Activation and Biologically Relevant Reactions
Cook, E.N.; Machan, C.W.* Dalton Trans. 2021 DOI: 10.1039/D1DT03178C
**HOT Article
51. Mediated Inner-Sphere Electron Transfer Induces Homogeneous Reduction of CO2 via Through-Space Electronic Conjugation
Hooe, S.L.; Moreno, J. J.; Reid, A.G.; Cook, E.N.; Machan, C.W.* Angew. Chemie, Int. Ed. 2022 DOI: 10.1002/anie.202109645
Corrigendum 61: e202205139
**VIP Designation
50. Catalytic Reduction of Dioxygen to Water by a Bioinspired Non-Heme Iron Complex via a 2+2 Mechanism
Cook, E.N.; Dickie, D.A.; Machan, C.W.* J. Am. Chem. Soc. 2021 DOI: 10.1021/jacs.1c04572
49. Pendent Relay Enhances H2O2 Selectivity during Dioxygen Reduction Mediated by Bipyridine-Based Co–N2O2 Complexes
Nichols, A.W.; Cook, E.N.; Gan, Y.J.; Miedaner, P.R.; Dressel, J.M.; Dickie, D.A.; Shafaat, H.S.; Machan, C.W.* J. Am. Chem. Soc. 2021 DOI: 10.1021/jacs.1c03381
48. Non-covalent Assembly of Proton Donors and p-benzoquinone Anions for Co-electrocatalytic Reduction of Dioxygen
Hooe, S.L.; Cook, E.N.; Reid, A.G.; Machan, C.W.* Chem. Sci. 2021 DOI: 10.10139/D1SC01271A
47. Electrocatalytic Water Oxidation by a Trinuclear Copper(II) Complex
Geer, A. M.; Musgrave III, C.; Webber, C.; Nielsen, R. J.; McKeown, B. A.; Liu, C.; Schleker, P. P. M.; Jakes, P.; Jia, X.; Dickie, D. A.; Granwehr, J.; Zhang, S.; Machan, C. W.*; Goddard, W. A.*; Gunnoe, T. B.*, ACS Catal. 2021 DOI: 10.1021/acscatal.1c01395.
46. DFT Study on the Electrocatalytic Reduction of CO2 to CO by a Molecular Chromium Complex
Moreno, J.J; Hooe, S.H.; Machan, C.W.* Inorg. Chem. 2021 DOI: 10.1021/acs.inorgchem.0c03136
45. Soluble, Crystalline, and Thermally Stable Alkali CO2– and Carbonite (CO22–) Clusters Supported by Cyclic(Alkyl)(Amino) Carbenes
Freeman, L.A.; Obi, A.D.; Machost, H.R.; Molino, A.; Nichols, A.W.; Dickie, D.A.; Wilson, D.J.D.*; Machan, C.W.*; Gilliard Jr., R.J.* Chem. Sci. 2021 DOI: 10.1039/D0SC06851A
44. Reduction of dioxygen to water by a Co(N2O2) complex with a 2,2′-bipyridine backbone
Nichols, A.W.; Kuehner, J.S.; Huffman, B.L.; Miedaner, P.R.; Dickie, D.A.; Machan, C.W.* Chem. Commun. 2021 DOI: 10.1039/D0CC06763F
43. Controlling Polymorphism and Orientation of NU-901/NU-1000 Metal–Organic Framework Thin Films
Verma, P.K.; Huelsenbeck, L.; Nichols, A.W.; Islamoglu, T.; Heinrich, H.; Machan, C.W.; Giri, G.* Chem. Mater. 2020 DOI: 10.1021/acs.chemmater.0c03539
42. Mechanistic Insight into Initiation and Regioselectivity in the Copolymerization of epoxides and anhydrides by Al Complexes
Popowski, Y.; Moreno, J.J.; Nichols, A.W.; Hooe, S.L.; Bouchey, C.J.; Rath, N.P.; Machan, C.W.*; Tolman, W.B.* Chem. Commun. 2020 DOI: 10/10339/D0CC05652A
41. Electrocatalytic CO2 Reduction to Formate with Molecular Fe(III) Complexes Containing Pendent Proton Relays
Nichols, A.W.; Hooe, S.L.; Kuehner, J.S.; Dickie, D.A.; Machan, C.W.* Inorg. Chem. 2020 DOI: https://doi.org/10.1021/acs.inorgchem.9b03341
40. Advances in the Molecular Catalysis of Dioxygen Reduction
Machan, C.W.* ACS Catal. 2020 DOI: 10.1021/acscatal.9b04477
39. Electrochemical CO2 Reduction in a Continuous Non-Aqueous Flow Configuration with [Ni(cyclam)]2+ Catalyst
Jiang, C.; Nichols, A.W.; Walzer, J.F.; Machan, C.W.* Inorg. Chem. 2020 DOI: 10.1021/acs.inorgchem.9b03171
38. Highly Efficient Electrocatalytic Reduction of CO2 to CO by a Molecular Chromium Complex
Hooe, S.L.; Dressel, J.M.; Dickie, D.A.; Machan, C.W.* ACS Catal. 2020 DOI: 10.1021/acscatal.9b04687
37. Catalytic Reduction of O2 to H2O2 via a Mn Complex
Hooe, S.L.; Machan, C.W.* Trends in Chemistry - Mechanism of the Month 2019 DOI: https://doi.org/10.1016/j.trechm.2019.09.002
36. Secondary-Sphere Effects in Molecular Electrocatalytic CO2 Reduction
Nichols, A.W.; Machan, C.W.* Front. Chemi. - Inorg. Chem. 2019 DOI: 10.3389/fchem.2019.00397
35. Electrocatalytic Reduction of Dioxygen by Mn(III) meso-Tetra(N-methylpyridinium-4-yl)porphyrin in Universal Buffer
Lieske, L.E.; Hooe, S.L.; Nichols, A.W.; Machan, C.W.* Dalton Trans. 2019 DOI: 10.1039/C9DT01436E
**HOT Article
34. Metal-Organic Frameworks as Porous Templates for Enhanced Cobalt Oxide Electrocatalyst Performance
Huelsenbeck, L.; Hooe, S.L.; Ghorbanpour, A.; Conley, A.M.; Heinrich, H.; Machan, C.W.*; Giri, G.* ACS Appl. Energy Mat. 2019 DOI: 10.1021/acsaem.9b00127
33. A Look at Periodic Trends in d-Block Molecular Electrocatalysts for CO2 Reduction
Jiang, C.; Nichols, A.W.; Machan, C.W.* Dalton Trans. 2019 DOI: 10.1039/C9DT00491B
32. Recent Advances in Spectroelectrochemistry Related to Molecular Catalytic Processes
Machan, C.W.* Curr. Opin. Electrochem. 2019 DOI: 10.10.1016/j.coelec.2019.03.010
31. Metal-Free Electrochemical Reduction of Carbon Dioxide Mediated by Cyclic(Alkyl)(Amino) Carbenes
Lieske, L.E.†; Freeman, L.A.†; Wang, G.; Dickie, D.A.; Gilliard Jr., R.J.*; Machan, C.W. * Chem. – Eur. J. 2019 DOI: 10.1002/chem.201900316
30. Dioxygen Reduction to Hydrogen Peroxide by a Molecular Mn Complex: Mechanistic Divergence Between Homogeneous and Heterogeneous Reductants
Hooe, S.L. and Machan, C.W. J. Am. Chem. Soc. 2019 DOI: 10.1021/jacs.8b13373
29. Nitric oxide activation facilitated by cooperative multimetallic electron transfer within an iron-functionalized polyoxovanadate–alkoxide cluster
Li, F.; Meyer, R.L.; Carpenter, S.H.; VanGelder, L.E.; Nichols, A.W.; Machan, C.W.; Neidig, M.L.; Matson, E.M.* Chem. Sci. 2018 DOI: 10.1039/C8SC00987B
28. Electrochemical Reduction of Carbon Dioxide with a Molecular Polypyridyl Nickel Complex
Lieske, L.E.; Rheingold, A.L.; Machan, C.W.* Sust. Energy Fuels 2018 DOI: 10.1039/C8SE00027A
27. Reversible Modulation of the Redox Characteristics of Acid-Sensitive Molybdenum and Tungsten Scorpionate Complexes
Heyer, A.J.; Shivokevich, P.J.; Hooe, S.L.; Welch, K.D.; Harman, W.D.; Machan, C.W. Dalton Trans. 2018 DOI:10.1039/C8DT00598B
26. Electrocatalytic Reduction of CO2 to Formate by an Iron Schiff Base Complex
Nichols, A.W.; Chatterjee, S.; Sabat, M.; Machan, C.W. Inorg. Chem. 2018, DOI: 10.1021/acs.inorgchem.7b02955
25. Electrocatalytic Reduction of Dioxygen to Hydrogen Peroxide by a Molecular Manganese Complex with a Bipyridine-Containing Schiff Base Ligand
Hooe, S.L.; Rheingold, A.L.; Machan, C.W. J. Am. Chem. Soc. 2018, DOI: 10.1021/jacs.7b09027
POSTDOCTORAL RESEARCH AT THE UNIVERSITY OF CALIFORNIA – SAN DIEGO
24. Charged Macromolecular Rhenium Bipyridine Catalysts with Tunable CO2 Reduction Potentials
Sahu, S.; Cheung, P.L.; Machan, C.W.; Chabolla, S.A.; Kubiak, C.P.; Gianneschi, N.C. Chem. – Eur. J. 2017, DOI: 10.1002/chem.201701901
23. Concerted One-Electron Two-Proton Transfer Processes in Models Inspired by the Tyr-His Couple of Photosystem II
Huynh, M.R.; Mora, S.J.; Villalba, M.; Tejeda-Ferrari, M.E.; Liddell, P.A; Cherry, B.R.; Teillout, A.-L.; Machan, C.W.; Kubiak, C.P.; Gust, D.; Moore, T.A.; Hammes-Schiffer, S.; Moore, A.L. ACS Cent. Sci. 2017, DOI: 10.1021/acscentsci.7b00125
22. Bio-inspired CO2 reduction by a rhenium tricarbonyl bipyridine-based catalyst appended to amino acids and peptidic platforms: incorporating proton relays and hydrogen-bonding functional groups
Chabolla, S.A.; Machan, C.W.; Yin, J.; Dellamary, E.A.; Sahu, S.; Gianneschi, N.C.; Gilson, M.K.; Tezcan, F.A.; Kubiak, C.P. Faraday Discuss. 2017, DOI: 10.1039/c7fd00003k
21. Electrocatalytic Reduction of Carbon Dioxide with Mn(terpyridine) Carbonyl Complexes
Machan, C.W.; Kubiak, C.P. Dalton Trans. 2016, 45, 17179
20. Interrogating Heterobimetallic Co-Catalytic Responses for the Electrocatalytic Reduction of CO2 Using Supramolecular Assembly
Machan, C.W.; Kubiak, C.P. Dalton Trans. Special Issue on 'Reactions Facilitated by Ligand Design' 2016, 45, 15942
19. Improving the Efficiency and Activity of Electrocatalysts for the Reduction of CO2 Through Supramolecular Assembly with Amino Acid-Modified Ligands
Machan, C.W.; Yin, J.; Chabolla, S.A.; Gilson, M.K.; Kubiak, C.P. J. Am. Chem. Soc. 2016, 138, 8184
18. Re(I) NHC Complexes for Electrocatalytic Conversion of CO2
Stanton III, C.J.; Machan, C.W.; Vandezande, J.E.; Jin, T.; Majetich, G.; Schaefer III, H.F.; Kubiak, C.P.; Li, G.; Agarwal, J. Inorg. Chem. 2016, 55, 3136
17. Photocatalytic Reduction of Carbon Dioxide to CO and HCO2H Using fac-Mn(CN)(bpy)(CO)3
Cheung, P.L.; Machan, C.W.; Malkhasian, Y.S.; Agarwal, J.; Kubiak, C.P. Inorg. Chem. 2016, 55, 3192
16. Rapid synthesis of redox-active dodecaborane B12(OR)12 clusters under ambient conditions
Wixtrom, A.I.; Shao, Y.; Jung, D.; Machan, C.W.; Kevork, S.N.; Qian, E.A.; Axtell, J.C.; Khan, S.I.; Kubiak, C.P.; Spokoyny, A.M. Inorg. Chem. Front. (Emerging Investigator Issue) 2016, 3, 711
15. Orientation of Immobilized Cyano-Substituted Bipyridine Re(I) fac-Tricarbonyl Electrocatalysts on Au Surfaces
Clark, M.L.; Rudshteyn, B.; Ge, A.; Chabolla, S.A.; Machan, C.W.; Psciuk, B.T.; Song, J.; Canzi, G.; Lian, T.; Batista, V.S.; Kubiak, C.P. J. Phys. Chem. C 2016, 120, 1657
14. Electrocatalytic Reduction of Carbon Dioxide by Mn(CN)(2,2ʹ-bipyridine(CO)3: CN Coordination Alters Mechanism
Machan, C.W.; Stanton III, C.J.; Vandezande, J.E.; Majetich, G.F.; Schaefer III, H.F; Kubiak, C.P.; Agarwal, J. Inorg. Chem. 2015, 54, 8849
13. Reductive Disproportionation of Carbon Dioxide by an Alkyl-Functionalized Pyridine Monoimine Re(I) fac-tricarbonyl Electrocatalyst
Machan, C.W.; Chabolla, S.A.; Kubiak, C.P. Organometallics 2015, 34, 4678
12. A Molecular Ruthenium Electrocatalyst for the Reduction of Carbon Dioxide to CO and Formate
Machan, C.W.; Sampson, M.D.; Kubiak, C.P. J. Am. Chem. Soc. 2015, 137, 8564
11. Synthesis, Spectroscopy, and Electrochemistry of (α-diimine)M(CO)3Br, M = Mn, Re, Complexes: Ligands Isoelectronic to Bipyridyl Show Differences in CO2 Reduction
Vollmer, M.; Machan, C.W.; Clark, M.L.; Antholine, W.; Agarwal, J.; Schaefer, H.F.; Kubiak, C.P; Walensky, J. Organometallics 2015, 34, 3
10. Supramolecular Assembly Promotes the Electrocatalytic Reduction of Carbon Dioxide by Re(I) Bipyridine Catalysts at a Lower Overpotential
Machan, C.W.; Chabolla, S.A.; Yin, J.; Gilson, M.K.; Tezcan, F.A.; Kubiak, C.P. J. Am. Chem. Soc. 2014, 136, 14598
9. Combined Steric and Electronic Effects of Positional Substitution on Dimethyl-Bipyridine Rhenium(I) Tricarbonyl Electrocatalysts for the Reduction of CO2
Chabolla, S.A.; Dellamary, E.A.; Machan, C.W.; Tezcan, F.A.; Kubiak, C.P. Inorg. Chim. Acta 2014, 422, 109
8. Developing a Mechanistic Understanding of Molecular Electrocatalysts for CO2 Reduction Using Infrared Spectroelectrochemistry
Machan, C.W.; Sampson, M.D.; Chabolla, S.A.; Dang, T.; Kubiak, C.P. Organometallics 2014, 33, 4550
GRADUATE RESEARCH AT NORTHWESTERN UNIVERSITY
7. General Strategy for the Synthesis of Rigid Higher-Order Platinum(II) Complexes via the Weak-Link Approach: Tweezers, Triple-Layers and Macrocycles
Kennedy, R.D.; Machan, C.W.; McGuirk, C.M.; Rosen, M.S.; Stern, C.L.; Mirkin, C.A. Inorg. Chem. 2013, 52, 5876
6. One-Pot Synthesis of an Fe(II) Bisterpyridine Complex with Allosterically Regulated Electronic Properties
Machan, C.W.; Adelhardt, M.; Sarjeant, A.A.; Stern, C.L.; Sutter, J.; Meyer, K.; Mirkin, C. A. J. Am. Chem. Soc. 2012, 134, 16921
5. Crystallographic Snapshots of the Bond-Breaking Isomerization Reactions of Ni(II) Complexes with Hemilabile Ligands
Machan, C.W.; Lifschitz, A.M.; Sarjeant, A.A.; Stern, C.L.; Mirkin, C.A.; Angew. Chem., Int. Ed. 2012, 51, 1469
4. A Coordination Chemistry Dichotomy for Icosahedral Carborane-Based Ligands
Spokoyny, A.M.; Machan, C.W.; Clingerman, D.J.; Rosen, M.S.; Wiester, M.J.; Kennedy, R.D.; Sarjeant, A.A.; Stern, C.L.; Mirkin, C.A.; Nat. Chem. 2011, 3, 590 Highlight by A. Weller, ibid.
3. Plasticity of the Nickel (II) Coordination Environment in Complexes with Hemilabile Phosphino Thioether Ligands
Machan, C.W.; Spokoyny, A.M.; Jones, M.R.; Sarjeant, A.A.; Stern, C.L.; Mirkin, C.A. J. Am. Chem. Soc. 2011, 33, 3023
2. Chelating Effect as a Driving Force for the Selective Formation of Heteroligated Pt(II) Complexes with Bidentate Phosphino-Chalcoether Ligands
Rosen, M.S.; Spokoyny, A.M.; Machan, C.W.; Stern, C.; Sarjeant, A.A.; Mirkin, C.A.; Inorg. Chem. 2011, 50, 1411
1. Electronic Tuning of Nickel-Based Bis(dicarbollide) Redox Shutles in Dye-Sensitized Solar Cells
Spokoyny, A.M.; Li, T.C.; Farha, O.K.; Machan, C.W.; She, C.; Marks, T.J.; Hupp, J.T.; Mirkin, C.A.; Angew. Chem., Int. Ed. 2010, 49, 5339
