PUBLICATIONS
2025
82. Nelson, K.; Kazmierczak, N. P.; Cagan, D. A.; Follmer, A. H.; Scott, T. R.; Raj, S. L.; Garratt, D.; Powers-Riggs, N.; Gaffney, K. J.; Hadt, R. G.*; Cordones, A. A.*
J. Phys. Chem. Lett., 2025, 16, 87.
2024
81. Kazmierczak, N. P.;† Xia, K. T;† Sutcliffe, E.; Aalto, J. P.; Hadt, R. G.*
A Spectrochemical Series for Electron Spin Relaxation
ChemRxiv, 2024.
†Co-first authors
80. Sutcliffe, E.; Kazmierczak, N. P.; Hadt, R. G.*
Ultrafast, all-optical coherence of molecular electron spins in room-temperature water solution
Science 2024, 386 (6724), 888.
79. Totoiu, C. A.; Follmer, A. H.; Oyala, P. H.; Hadt, R. G.*
Probing Bioinorganic Electron Spin Decoherence Mechanisms with an Fe2S2 Metalloprotein
J. Phys. Chem B, 2024, 128 (42), 10417.
78. Mirzoyan, R.; Barrientos, H. F. K-H.; Hwang, K. H.; Hadt, R. G.*
ChemRxiv, 2024.
77. Kazmierczak, N. P.; Oyala, P. H.; Hadt, R. G.*
Spectroscopic Signatures of Phonon Character in Molecular Electron Spin Relaxation
ACS Cent. Sci., 2024.
76. Lohaus, S. H.; Kazmierczak, N. P.; Luedecke, K. M.; Marx, B.; Nemykin, V. N.; Hadt, R. G.*
J. Porphyr. Phthalocyanines 2024, 28 (06), 383.
Invited submission for the SPP / JPP Young Investigator Award.
75. Cagan, D. A.; Bím, D.; Kazmierczak, N. P.; Hadt, R.G.*
Mechanisms of Photoredox Catalysis Featuring Nickel–Bipyridine Complexes
ACS Catal. 2024, 14 (11), 9055.
74. Sutcliffe, E.;† Cagan, D. A.;† Hadt, R. G.*
J. Am. Chem. Soc. 2024, 146 (22), 15506.
†Co-first authors
73. Poh, Y. R.; Morozov, D.; Kazmierczak, N. P.; Hadt, R. G.; Groenhof, G.;* Yuen-Zhou, J.*
Alternant Hydrocarbon Diradicals as Optically Addressable Molecular Qubits
J. Am. Chem. Soc. 2024, 146 (22), 15549.
72. Smith, N.; Dasgupta, M.; Wych, D. C.; Dolamore, C.; Sierra, R. G.; Lisova, S.; Marchany-Rivera, D.; Cohen, A. E.; Boutet, S.; Hunter, M. S.; Kupitz, C.; Poitevin, F.; Moss III, F. R.; Mittan-Moreau, D. W.; Brewster, A. S.; Sauter, N. K.; Young, I. D.; Wolff, A. M.; Tiwari, V. K.; Kumar, N.; Berkowitz, D. B.; Hadt, R. G.; Thompson, M. C.; Follmer, A. H.; Wall, M. E.; Wilson, M. A.*
Changes in an enzyme ensemble during catalysis observed by high-resolution XFEL crystallography
Sci. Adv. 2024, 10, eadk7201.
71. Bím, D.; Luedecke, K. M.; Cagan, D. A.; Hadt, R. G.*
Inorg. Chem. 2024, 63 (9), 4120.
70. Kazmierczak, N. P.; Lopez, N. E.; Luedecke, K. M.; Hadt, R. G.*
Chem. Sci. 2024, 15, 2380.
Selected for the 2024 HOT Article Collection.
69. Mirzoyan, R.; Follmer, A.; Hadt, R. G.*
Observing Long-lived Photogenerated Holes in Cobalt Oxyhydroxide Oxygen Evolution Catalysts
ACS Appl. Energy Mater. 2024, 7 (7), 2837.
2023
68. Kazmierczak, N. P.;† Luedecke, K. M.;† Gallmeier, E. T.; Hadt, R. G.*
J. Phys. Chem. Lett. 2023, 14 (34), 7658.
†Co-first authors
67. McNicholas, B. J.;† Tong, Z. J.;† Bím, D.; Turro, R. F.; Kazmierczak, N. P.; Chalupský, J.; Reisman, S. E.; Hadt, R. G.*
Inorg. Chem. 2023, 62(34), 14010.
†Co-first authors.
66. Turro, R. F.; Wahlman, J. L. H.; Tong, Z. J.; Chen, X.; Yang, M.; Chen, E. P.; Hong, X.; Hadt, R. G.; Houk, K. N.; Yang, Y-F.; Reisman, S. E.*
J. Am. Chem. Soc. 2023, 145 (27), 14705
65. Cagan, D. A.;† Bím, D.;† McNicholas, B. J.; Kazmierczak, N. P.; Oyala, P. H.; Hadt, R. G.*
Inorg. Chem. 2023, 62 (24), 9538.
†Co-first authors
64. McNicholas, B. J.;* Nie, C.; Jose, A.; Oyala, P. H.; Takase, M. K.; Henling, L. M.; Barth, A. T.; Amaolo, A.; Hadt, R. G.; Solomon, E. I.; Winkler, J. R.; Gray, H. B.;* Despagnet-Ayoub, E.*
Inorg. Chem.2023, 62 (7), 2959.
Selected for front cover (art by Gared C. Luquet).
2022
63. Follmer, A. H.;† Luedecke, K. M.;† Hadt, R. G.*
Inorg. Chem. 2022, 61 (50), 20493.
†Co-first authors
62. Kazmierczak, N. P.; Hadt, R. G.*
Illuminating Ligand Field Contributions to Molecular Qubit Spin Relaxation via T1 Anisotropy
J. Am. Chem. Soc. 2022, 144 (45), 20804.
61. Cagan, D. A.; Bím, D.; Silva, B.; Kazmierczak, N. P.; McNicholas, B. J.; Hadt, R. G.*
Elucidating the Mechanism of Excited-State Bond Homolysis in Nickel–Bipyridine Photoredox Catalysts
J. Am. Chem. Soc. 2022, 144 (14), 6516.
2021
60. Li, N.; Hadt, R. G.*; Hayes, D.*; Chen, L. X.; Nocera, D. G.*
Nat. Commun. 2021, 12 (4218), 1-6.
59. Kazmierczak, N. P.; Mirzoyan, R.; Hadt, R. G.*
The Impact of Ligand Field Symmetry on Molecular Qubit Coherence
J. Am. Chem. Soc., 2021, 143 (42), 17305.
58. Hwang, S. J.; Hadt, R. G.; Ruccolo, S.; Gygi, D.; Zheng, S.-L.; Chen, Y.-S.; Nocera, D. G.*
Photohalogen Elimination Chemistry in Low-valent Binuclear Nickel Complexes
Polyhedron, 2021, 203, 115228.
57. Mirzoyan, R.; Kazmierczak, N. P.; Hadt, R. G.*
Chem. Eur. J. 2021, 27, 9482.
Selected by the editorial office as part of their Showcase for outstanding review-type articles.
Frontispiece artwork by David A. Cagan.
56. Gao, Y.; Hill, D. E.; Hao, W.; McNicholas, B. J.; Vantourout, J. C.; Hadt, R. G.; Reisman, S. E.*; Blackmond, D.*; Baran, P. S.*
Electrochemical Nozaki–Hiyama–Kishi Coupling: Scope, Applications, and Mechanism
J. Am. Chem. Soc., 2021, 143 (25), 9478.
55. Reinhard, M. E.; Mara, M. W.; Kroll, T.; Lim, H.; Hadt, R. G.; Alonso-Mori, R.; Chollet, M.; Glownia, J. M.; Nelson, S.; Sokaras, D.; Kunnus, K.; van Driel, T. B.; Hartsock, R. W.; Kjaer, K. S.; Weninger, C.; Biasin, E.; Gee, L. B.; Hodgson, K. O.; Hedman, B.; Bergmann, U.; Solomon, E. I.*; Gaffney, K. J.*
Nat. Commun. 2021, 12 (1086), 1-8.
2020
54. Ribson, R. D.; Choi, G.; Hadt, R. G.*; Agapie, T.*
ACS Cent. Sci. 2020, 6 (11), 2088.
53. Follmer, A. H.†; Ribson, R. D.†; Oyala, P. H.; Chen, G. Y.; Hadt, R. G.*
J. Phys. Chem. A. 2020, 124 (44), 9252.
†Co-first authors
52. Cagan, D. A.†; Stroscio, G. D.†; Cusumano, A. Q.; Hadt, R. G.*
Multireference Description of Nickel–Aryl Bond Dissociation Processes in Photoredox Catalysis
J. Phys. Chem. A. 2020, 124 (48), 9915.
†Co-first authors
51. Li, N.; Keane, T. P.; Veroneau, S. S.; Hadt, R. G.; Hayes, D.; Chen, L. X.; Nocera, D. G.*
Template stabilized oxidic nickel oxygen evolution catalyst
Proc. Natl. Acad. Sci. 2020, 117 (28), 16187.
50. Ngo, D. X.; Del Ciello, S. A.; Barth, A. T.; Hadt, R. G.; Grubbs, R. H; Gray, H. B.*; McNicholas, B. J.*
Inorg. Chem. 2020, 59 (14), 9594.
49. Stroscio, G. D.; Srnec, M.*; Hadt, R. G.*
Inorg. Chem. 2020, 59 (13), 8707.
48. Higdon, N. J.; Barth, A. T.; Kozlowski, P. T.; Hadt, R. G.*
J. Chem. Phys. 2020, 152, 204306. Part of the 2020 Emerging Investigators Special Collection.
47. Mirzoyan, R.; Hadt, R. G.*
“The Dynamic Ligand Field of a Molecular Qubit: Decoherence Through Spin-Phonon Coupling,”
Phys. Chem. Chem. Phys. 2020, 22, 11249.
Selected for the front cover (art by David A. Cagan)
Selected for the HOT articles collection.
2019
46. Stroscio, G. D.; Ribson, R. D.; Hadt, R. G.*
Quantifying Entatic States in Photophysical Processes: Applications to Copper Photosensitzers
Inorg. Chem. 2019, 58 (24), 16800.
Selected for cover (art by David A. Cagan).
45. Jette, C. I.; Tong, Z. J.; Hadt, R. G.*; Stoltz, B. M.*
Angew. Chem. Int. Ed. 2019, 58, 1-7.
Prior to Caltech
44. Snyder, B. E. R.; Bols, M. L.; Rhoda, H. M.; Vanelderen, P; Bottger, L. H.; Braun, A.; Yan, J. J.; Hadt, R. G.; Babicz, J. T. Jr.; Hu, M. Y.; Zhao, J.; Alp, E. E.; Hedman, B.; Hodgson, K. O.; Schoonheydt, R. A.; Sels, B. F.; Solomon, E. I.
Mechanism of selective benzene hydroxylation catalyzed by iron-containing zeolites
Proc. Natl. Acad. Sci. 2018, 115(48), 12124.
43. Hong, J.; Kelley, M. S.; Shelby, M. L.; Hayes, D.; Hadt, R. G.; Rimmerman, D.; Zhang, X.; Chen, L. X.
Chem. Sus. Chem. 2018, 11(14), 2421.
42. Hayes, D.; Kohler, L.*; Hadt, R. G.*; Zhang, X.; Liu, C.; Mulfort, K. L.; Chen, L. X.
Chem. Sci. 2017, 9(4), 860. *Equal contributions.
41. Kohler, L. Hadt, R. G.; Hayes, D.; Chen, L. X.; Mulfort, K. L.
Dalton Trans. 2017, 46(38), 13088.
40. Mara, M.; Hadt, R. G.; Reinhart, M. E.; Kroll, T.; Lim, H.; Hartsock, R. W.; Alonso-Mori, R; Chollet, M; Glownia, J. M.; Nelson, S.; Sokaras, D.; Kunnus, K; Hodgson, K. O.; Hedman, B.; Bergmann, U.; Gaffney, K. J.; Solomon, E. I.
Metalloprotein entatic control of ligand-metal bonds quantified by ultrafast x-ray spectroscopy
Science 2017, 356(6544), 1276. SSRL press release June 2017.
Featured News Article: How a Single Chemical Bond Balances Cells Between Life and Death
39. Kjaer, K. S.; Zhang, W.; Alonso-Mori, R.; Bergmann, U.; Chollet, M.; Hadt, R. G.; Hartsock, R. W.; Harlang, T.; Kroll, T.; Kubicek, K; Lemke, H. T.; Liang, H. W.; Liu, Y.; Nielsen, M. M.; Robinson, J. S.; Solomon, E. I.; Sokaras, D.; van Driel, T. B.; Weng, T.-C.; Zhu, D.; Persson, P.; Wämmark, K; Sundström, V; Gaffney, K. J.
Struc. Dyn. 2017, 4(4), 044030. Special issue in memory of Ahmed Zewail.
38. Kelley, M. S.; Shelby, M. L.; Mara, M. W.; Haldrup, K.; Hayes, D.; Hadt, R. G.; Zhang, X. Stickrath, A. B.; Ruppert, R.; Sauvage, J. P.; Zhu, D.; Lemke, H. T.; Chollet, M.; Schatz, G. C.; Chen, L. X.
J. Phys. B. 2017, 50(15), 154003. Special issue on Problems of Light Energy Conversion, Light Harvesting.
37. Brodsky, C. N.*; Hadt, R. G.*; Hayes, D.; Reinhart, B. J.; Li, N.; Chen, L. X.; Nocera, D. G.
Proc. Natl. Acad. Sci. 2017, 114(15), 3855. *Co first authors. ANL press release June 2017.
Featured News Article: Chemical “dance” of cobalt catalysis could pave way to solar fuels
36. Li, N.*; Bediako, D. K.*; Hadt, R. G.; Hayes, D.; Kempa, T. J.; von Cube, F.; Bell, D. C.; Chen, L. X.; Nocera, D. G.
Influence of iron doping on tetravalent nickel content in catalytic oxygen evolving films
Proc. Natl. Acad. Sci. 2017, 114(7) 1486. *Co first authors.
35. Zhang, W.; Kjaer, K. S.; Alonso-Mori, R.; Bergmann, U.; Chollet, M.; Fredin, L. A.; Hadt, R. G.; Hartsock, R. W.; Harlang, T.; Kroll, T.; Kubicek, K; Lemke, H. T.; Liang, W.; Liu, Y.; Nielsen, M. M.; Persson, P.; Robinson, J. S.; Solomon, E. I.; Sun, Z.; Sokaras, D.; van Driel, T. B.; Weng, T.-C.; Zhu, D.; Warnmark, K; Sundström, V; Gaffney, K. J.
Chem. Sci. 2017, 8(1), 515.
34. Hayes, D.; Hadt, R. G.; Emery, J. D.; Cordones, A. A.; Martinson, A. B. F.; Shelby, M. L.; Fransted, K. A.; Dahlberg, P. D.; Hong, J.; Zhang, X.; Kong, Q.; Schoenlein, R. W.; Chen, L. X.
Energy Environ. Sci. 2016, 9(12), 3754.
33. Hadt, R. G.; Hayes, D.; Brodsky, C. N.; Ullman, A. J.; Casa, D. M.; Upton, M. H.; Nocera, D. N.; Chen, L. X.
J. Am. Chem. Soc. 2016, 138(34), 11017.
32. Solomon, E. I.; Hadt, R. G.; Snyder, B. E. R.
Activating Metal Sites for Biological Electron Transfer
Isr. J. Chem. 2016, 56(9-10), 649. Special Issue in honor of Harry Gray’s 80th birthday.
31. Li, L.*; Hadt, R. G.*; Yao, S.; Cai, Z.; Wu, Q.; Lo, W.; Chen, L. X.; Yu, L.
Photocatalysts Based on Cobalt-Chelating Conjugated Polymers for Hydrogen Evolution from Water
Chem. Mater. 2016, 28(15), 5394. *Co first authors.
30. Hwang, S. J.; Anderson, B. L.; Powers, D. C.; Maher, A. G.; Hadt, R. G.; Nocera, D. G.
Organometallics 2015, 34(19), 4766. Special issue in honor of Gregory Hillhouse.
29. Hwang, S. J.; Powers, D. C.; Maher, A. G.; Anderson, B. L.; Hadt, R. G.; Zheng, S.-L.; Chen, Y.-S.; Nocera, D. G.
Trap-Free Halogen Photoelimination from Mononuclear Ni(III) Complexes
J. Am. Chem. Soc. 2015, 137(20), 6472.
28. Vanelderen, P.; Snyder, B. E. R.; Tsai, M.-L.; Hadt, R. G., Vancauwenbergh, J. Coussens, O.; Schoonheydt, R. A.; Sels, B. F.; Solomon, E. I.
Spectroscopic Definition of the Copper Active Sites in Mordenite: Selective Methane Oxidation
J. Am. Chem. Soc. 2015, 137(19), 6383.
27. Kroll, T.; Hadt, R. G.; Wilson, S. A.; Lundberg, M.; Yan, J. J.; Weng, T. C.; Sokaras, D.; Alonso-Mori, R. A.; Casa, D.; Upton, M.; Hedman, B.; Hodgson, K. O.; Solomon, E. I.
J. Am. Chem. Soc. 2014, 136(52), 18087.
26. Hadt, R. G.; Gorelsky, S. I.; Solomon, E. I.
Anisotropic Covalency Contributions to Superexchange Pathways in Type One Copper Sites
J. Am. Chem. Soc. 2014, 136(42), 15034.
25. Nguyen, A; Hadt, R. G.; Solomon, E. I.; Tilley, T. D.
Efficient C-H Bond Activations via O2Cleavage by a Dianionic Cobalt(II) Complex
Chem. Sci. 2014, 5(7), 2874. Top 25 downloaded articles for Q2 2014.
24. Zhang, W.; Alonso-Mori, R.; Bergmann, U.; Chollet; M.; Hadt, R. G.; Hartsock, R. W.; Kroll, T.; Kjaer, K. S.; Kubicek, K.; Lemke, H. T.; Liang, H. W.; Meyer, D. A.; Nielsen, M. M.; Purser, C.; Robinson, J. S.; Solomon, E. I.; Sun, Z.; Sokaras, D.; van Driel, T. B.; Weng, T.-C.; Zhu, D.; Gaffney, K. J.
Tracking Excited State Charge and Spin Dynamics in Iron Coordination Complexes
Nature 2014, 509(7500), 345.
23. Vanelderen, P. V.; Vacauwenbergh, J.; Tsai, M.-L.; Hadt, R. G.; Solomon, E. I.; Schoonheydt, R. A; Sels, B. F.
Spectroscopy and Redox Chemistry of Copper in Mordenite
Chem. Phys. Chem. 2014, 15(1), 91. Cover Article.
22. Tsai, M.-L.; Hadt, R. G.; Vanelderen, P.; Sels, B. F; Schoonheydt, R. A.; Solomon, E. I.
J. Am. Chem. Soc. 2014, 136(9), 3522.
21. Solomon, E. I.; Heppner, D. E.; Pierce, E.; Ginsbach, J. G.; Cirera, J.; Qayyum, M.; Kieber-Emmons, M. T.; Kjaergaard, C. H.; Hadt, R. G.; Tian, T.
Copper Active Sites in Biology
Chem. Rev. 2014, 114, 3659. Thematic Issue: Bioinorganic Enzymology II.
20. Sieracki, N. A.*; Tian, S.*; Hadt, R. G.*; Zhang, J.-L; Woertink, J. S.; Nilges, M. J.; Sun, F.; Solomon, E. I.; Lu, Y.
Copper-sulfenate Complex from Oxidation of a Cavity Mutant of Pseudomonas aeruginosa Azurin
Proc. Natl. Acad. Sci. 2014, 111(3), 918. *Co first authors.
19. Tsai, M.-L.; Hadt, R. G.; Marshall, N. M.; Wilson, T. D.; Lu, Y.; Solomon, E. I.
Proc. Natl. Acad. Sci. 2013, 110(36), 14658.
18. Hadt, R. G.; Sun, N.; Marshall, N. M; Lu, Y.; Hodgson, K. O.; Hedman, B.; Solomon, E. I.
J. Am. Chem. Soc. 2012, 134(40), 16701.
17. Hadt, R. G.; Xie, X.; Pauleta, S. R.; Moura, I.; Solomon, E. I.
J. Inorg. Biochem. 2012, 115, 155. Special Issue in Honor of Hans Freeman.
16. Durand, F.; Kjaergaard, C. H., Suraniti, E.; Gounel, S.; Hadt, R. G.; Solomon, E. I.; Mano, N.
Biosensors and Bioelectronics 2012, 35(1), 140.
15. Vanelderen, P., Hadt, R. G.; Smeets, P. J., Solomon, E. I.; Schoonheydt, R. A.; Sels, B. F.
Cu-ZSM-5: A Biomimetic Inorganic Model for Methane Oxidation
J. Catalysis 2011, 284(2), 157.
14. Solomon, E. I. & Hadt, R. G.
Recent Advances in Understanding Blue Copper Proteins
Coord. Chem. Rev. 2011, 255(7-8), 774.
13. Nemykin, V. N. & Hadt, R. G.
J. Phys. Chem. A 2010, 114(45), 12062.
12. Smeets, P. J.; Hadt, R. G.; Woertink, J. S.; Vanelderen, P.; Schoonheydt, R. A.; Sels, B. F.; Solomon, E. I.
Oxygen Precursor to the Reactive Intermediate in Methanol Synthesis by Cu-ZSM-5
J. Am. Chem. Soc. 2010, 132(42), 14736.
11. Nemykin, V. N.; Rohde, G. T.; Barrett, C. D.; Hadt, R. G.; Sabin, J. R.; Reina, G.; Galloni, P.; Floris, B.
Long-range Electronic Communication in Free-base Meso-poly(ferrocenyl)-containing Porphyrins
Inorg. Chem. 2010, 49(16), 7497.
10. Hadt, R. G.; Nemykin, V. N.; Olsen, J. G.; Basu, P.
Phys. Chem. Chem. Phys. 2009, 11(44), 10377.
9. Nemykin, V. N.; Rohde, G. T.; Barrett, C. D.; Hadt, R. G.; Bizzarri, C.; Galloni, P.; Floris, B; Nowik, I; Herber, R. H.; Marrani, A. G.; Zanoni, R.; Loim, N. M.
J. Am. Chem. Soc. 2009, 131(41), 14969–14978.
8. Xie, X.; Hadt, R. G.; Pauleta, S.; Moura, I; Solomon, E. I.
J. Inorg. Biochem. 2009, 103(10), 1307. Special Issue Containing Contributions from the First Latin American Meeting on Biological Inorganic Chemistry – LABIC 2008.
7. Hadt, R. G.& Nemykin, V. N.
Inorg. Chem. 2009,48(9), 8297.
6. Nemykin, V. N.; Galloni, P; Floris, B; Barrett, C. D.; Hadt, R. G.; Subbotin, R. I.; Polshin, E. V.; Marrani, A. G.; Zanoni; R.; Nikolay, N. M.
Dalton Trans. 2008, 32, 4233.
5. Nowik, I; Herber, R. H; Grosland, J. O.; Hadt, R. G.; Nemykin, V. N.
Metal Atom Dynamics in Organometallics: Cyanoferrocenes
Organometallic Chem. 2008, 693(10), 1850.
4. Nemykin, V. N.; Hadt, R. G.; Belosludov, R. V.; Mizuseki, H; Kawazoe, Y.
J. Phys. Chem. A. 2007, 111(50), 12901.
3. Nemykin, V. N.; Makarova, E. A.; Grosland, J. O.; Hadt, R. G.; Koposov, A. Y.
Inorg. Chem. 2007, 46(23), 9591.
2. Nemykin, V. N.; Barrett, C. D.; Hadt, R. G.; Subbotin, R. I.; Maximov, A. Y.; Polshin, E. V.; Koposov, A. Y.
Dalton Trans. 2007, 31, 3378.
1. Nemykin, V. N. & Hadt, R. G.
Inorg. Chem. 2006, 45(20), 8297.