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Research @ UVA

15. 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

14. 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 Catalysis 2020 DOI: 10.1021/acscatal.9b04687

13. 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

12. Secondary-Sphere Effects in Molecular Electrocatalytic CO₂ Reduction

Nichols, A.W.; Machan, C.W.* Frontiers in Chemistry - Inorganic Chemistry 2019 DOI: 10.3389/fchem.2019.00397

11. 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, Charles W.* Dalton Transactions 2019 DOI: 10.1039/C9DT01436E

10. 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, Charles W.*; Giri, G.* ACS Applied Energy Materials 2019 DOI: 10.1021/acsaem.9b00127

9. A Look at Periodic Trends in d-Block Molecular Electrocatalysts for CO2 Reduction

Jiang, C.; Nichols, A.W.; Machan, Charles W.* Dalton Transactions 2019 DOI: 10.1039/C9DT00491B

8. Recent Advances in Spectroelectrochemistry Related to Molecular Catalytic Processes

Machan, C.W.* Current Opinion in Electrochemistry 2019 DOI: 10.10.1016/j.coelec.2019.03.010

7. 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. * Chemistry – A European Journal 2019 DOI: 10.1002/chem.201900316

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

Hooe, S.L. and Machan, C.W. Journal of the American Chemical Society 2019 DOI: 10.1021/jacs.8b13373

5. 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 

4. 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

3. 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 DOI:10.1039/C8DT00598B

2. 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

1. 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

17. 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

16. 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

15. 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

14. Electrocatalytic Reduction of Carbon Dioxide with Mn(terpyridine) Carbonyl Complexes

Machan, C.W.; Kubiak, C.P. Dalton Trans. 2016, 45, 17179

13. 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

12. 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

11. 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

10. 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

9. 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

8. 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

7. 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

6. 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

5. 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

4. 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

3. 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

2. 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

1. 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