Machan Research Group

Inorganic chemistry focused on catalysis related to energy, electrochemistry, spectroelectrochemistry, and materials chemistry

Publications

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Research @ UVA

30. Dioxygen Reduction to Hydrogen Peroxide by a Molecular Mn Complex: Mechanistic Divergence Between Homogeneous and Heterogeneous Reductants

Hooe, S.L.; Machan, C.W. Journal of the American Chemical Society 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. Chemical Science 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. Sustainable 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 Transactions, 2018 ASAP 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

24. Charged Macromolecular Rhenium Bipyridine Catalysts with Tunable CO2 Reduction Potentials

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

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