Overview
David Eichhorn is the Interim Dean of Fairmount College and a professor of chemistry. He started his career as an assistant professor of chemistry at 鶹ƽ State in 1996, with promotions to associate professor in 2002 and professor in 2009. He has served as associate dean of the graduate school (2005-2008), chair of the department of chemistry (2008-2018), and Associate Dean for Faculty Development and Research (2019-2024). Dr. Eichhorn has authored more than 60 papers in bioinorganic and transition metal chemistry.
Originally from the Maryland suburbs of Washington, DC, Dr. Eichhorn earned a Ph.D. in inorganic chemistry from the University of California, Berkeley, in 1992 and a bachelor of arts in chemistry from Harvard University in 1986. Before coming to 鶹ƽ State, he completed four years of postdoctoral research at Northwestern University.
Information
Metalloenzyme active sites, Transition metal scorpionate complexes
Inorganic Chemistry
64. Kromer, J.R.; Oberley, A.J.; Kadel, L.R.; Vonarx, D.; McNeil, J.; Haskin, J.; Steinert, R.M.; Mitchell-Koch, K.R.; Moore, C.E.; Eichhorn, D.M.; “Synthesis and X-ray crystal structures of mononuclear and multinuclear metal complexes of 3-substituted 4-cyanopyrazole ligands”; Polyhedron 2023, 243, 116546.
63. Salerno, E.V.; Kadel, L.R.; Eichhorn, D.M.; “Ethanol(nitrato)[tris(4-cyano-3-phenyl-1H-pyrazol-1-yl)hydroboratonickel(II)”; IUCrData 2021, 6, x210690.
62. Freige, M.J.; Senaratne, N.K.; Eichhorn, D.M.; “(2-{[2-(Dimethylamino)ethyl]iminomethyl}benzenethiolato-κ3N,N’,S )(4-methoxybenzenethiolato-κS)nickel(II)” ; IUCrData 2018, 3, x181167.
61. Oberley, A.J.; Kadel, L.R.; Senaratne, N.K.; Eichhorn, D.M.; “Tetraethylammonium (acetonitrile)trichloridopalladate(II)”; IUCrData 2018, 3, x180750.
60. Senaratne, N.K.; Mwania, T.M.; Moore, C.E.; Eichhorn, D.M.; “Ni complexes of N2S ligands with amine/imine and amine/amide donors with relevance to the active site of Ni Superoxide Dismutase”; Inorg. Chim. Acta 2018, 476, 27-37.
59. Meloccaro, A.; Zimmerman, J.R.; Eichhorn, D.M.; “Bis{2-[({[3-(dimethyl-azaniumyl)propyl]imino}-methyl)phenyl]sulfanido}nickel(II) tetraphenylborate”; IUCrData 2017, 2, x171067.
58. Rillema, D.P.; KomReddy, V.; Senaratne, N.K.; Eichhorn, D.M.; “Methyl 5-methylpyrazine-2-carboxylate”; IUCrData 2017, 2, x170997.
57. Rillema, D.P.; KomReddy, V.; Senaratne, N.K.; Eichhorn, D.M.; “(2,2′-Bipyrazine-κ2N1,N1′)1,2-(徱ԲDz)ٳԱ-κP]tricarbonylrhenium(I) trifluoromethanesulfonate monohydrate”; IUCrData 2017, 2, x170935.
56. Panja, A; Jana, N.C.; Bauzá, A; Adak, S.; Eichhorn, D.M.; Frontera, A.; “Introducing supramolecular interactions into robust bis(tetrabromocatecholate) chelated manganese(III) systems and biomimetic catalytic activity”; Chem. Select, 2017, 2, 2094-2105.
55. Kadel, L.R.; Kromer, J.R.; Moore, C.E.; Eichhorn, D.M.; “New trisubstituted cyanopyrazoles and cyanoscorpionates”; Polyhedron 2017,125, 206-218.
54. Kadel, L.R.; Bullinger, J.C.; Baum, Robert R.; Moore, C.E.; Tierney, D.L.; Eichhorn, D.M.; “Cyanoscorpionate Ligands: Agostic Interactions in a Series of Metal Complexes Containing the Tris(4-cyano-3-phenylpyrazolyl)borate and Bis(4-cyano-3-phenylpyrazolyl)borate Ligands”; Eur. J. Inorg. Chem. 2016 2543-2551.
53. Sullivan, M.T.; Senaratne, N.K.; Eichhorn, D.M.; “Synthesis and X-ray Crystallographic Characterization of [In(tsalen)(OAc)] (tsalen = N,N'-Ethylenebis(thiosalicylideneimine))”; Polyhedron 2016, 114, 152-155.
52. Panja, A.; Jana, N.C.; Patra, M.; Brandão, P.; Moore, C.E.; Eichhorn, D.M.; Frontera, A; “Valence tautomerism induced nucleophilic ipso substitution in a coordinated tetrabromocatecholate ligand and diverse catalytic activity mimicking the function of phenoxazinone synthase”; J. Mol. Cat. A 2016, 412, 56-66.
51. Panja, A.; Eichhorn, D.M.; “A linear S-bridged trinuclear cobalt(III) complex with 2-aminobenzenethiol: synthesis, crystal structure, and spectroscopic characterization”; J. Coord. Chem. 2013, 66, 3037-3044.
50. Lai, H.; Dou, D.; Aravapalli, S.; Teramoto, T.; Lushington, G.H.; Mwania, T.M.; Alliston, K.R.; Eichhorn, D.M.; Padmanabhan, R.; Groutas, W.C.; “Design, Synthesis and Characterization of Novel 1,2-Benzisothiazol-3(2H)-one and 1,3,4-Oxadiazole Hybrid Derivatives: Potent Inhibitors of Dengue and West Nile Virus NS2B/NS3 Proteases” Bioorganic & Medicinal Chemistry 2013, 21, 102-113.
49. Panja, A.; Eichhorn, D.M.; “Mono- and di-nuclear nickel(II) complexes with mixed N/S-donor ligands: Syntheses, structures and physical properties”; Inorg. Chim. Acta 2012, 391, 88-92.
48. Johnson, D.M.; Eichhorn, D.M.; Moore, C.E.; Mwania, T.M.; Zhao, N.; Cyano-substituted bispyrazolylborates thallium(I) complexes”; J. Chem. Crystallog. 2012, 42, 746-751.
47. Zimmerman, J.R.; Smucker, B.W.; Dain, R.P.; VanStipdonk, M.J.; Eichhorn, D.M.; “Tridentate N2S ligand from 2,2’-dithiodibenzaldehyde and N,N-dimethylethylenediamine: Synthesis, structure, and characterization of a Ni(II) complex with relevance to Ni Superoxide Dismutase”; Inorg. Chim. Acta 2011,373 54-61.
46. Andra, K.K.; Bullinger, J.C.; Bann, J.G.; Eichhorn, D.M.; 2-Fluoro-L-Histidine; Acta Cryst. 2010, E66, o2713.
45. Dou, D.; He, G.; Lai, Z.; Wei, L.; Alliston, K.R.; Lushington, G.H.; Eichhorn, D.M.; Groutas, W.C.; “Utilization of the 1,2,3,5-thiatriazolidin-3-one 1,1-Dioxide Scaffold in the Design of Potential Inhibitors of Human Leukocyte Proteinase 3; Bioorg. Med. Chem. 2010, 18, 1093-1102.
44. Eichhorn, D.M.; “Analysis of ‘Janus Scorpionates: Supramolecular Tectons for the Directed Assembly of Hard–Soft Alkali Metallopolymer Chains’ and ‘A Second-Generation Janus Scorpionate Ligand: Controlling Coordination Modes in Iron(II) Complexes’”; Chemtracts Organic Chemistry 2009, 22, 135-140.
43. Bullinger, J.C.; Eichhorn, D.M.; “Cyanoscorpionates: Co(II), Mn(II), and Ni(II) Complexes Coordinated Only Through the Cyano Group”; Inorg. Chim. Acta, 2009, 362, 4510-4516.
42. Panja, A.; Eichhorn, D.M.; “Synthesis and Characterization of Tetrahedrally and Octahedrally Coordinated Mixed Valence Cobalt(II,III) Complex with Thiosemicarbazone Based Ligand”; J. Coord. Chem. 2009, 62, 2600-2609.
41. Dou, D.; Talaty, E.R.; Moore, C.; Bullinger, J.; Eichhorn, D.M.; Groutas, W.C.; “Formation of an Unusual Dimeric Product in the Reaction of a 1,2,5 –Thiadiazolidine 1,1 Dioxide-Derived Thioether with Sulfuryl Chloride”; J. Heterocyclic Chem. 2009, 46, 669&Բ;–&Բ;673.
40. Burns, D.H.; Meece, F.A.; Moore, C.E.; Eichhorn, D.M. “Two similar dibenzo cyclic ethers with dissimilar conformations”; Acta Crystallogr. 2009, C65, o27-o30. DOI
39. Panja, A.; Campana, C.; Leavitt, C.; Van Stipdonk, M.J.; Eichhorn, D.M. “Iron and Cobalt Complexes of 2,6-Diacetylpyridine-bis(R-thiosemicarbazone) (R=H, phenyl) Showing Unprecedented Ligand Deviation from Planarity”; Inorg. Chim. Acta 2009, 362, 1348-1354. DOI
38. Zhao, N.; Bullinger, J.C.; Van Stipdonk, M.J.; Stern, C.L.; Eichhorn, D.M.; “Cyanoscorpionates – Synthesis and Crystallographic Characterization of 1-D Cu(I) Coordination Polymers”; Inorg. Chem. 2008, 47, 5945-5950. DOI:
37. Zhao, N.; Van Stipdonk, M.J.; Bauer, C.; Campana, C.; Eichhorn, D.M. “Sandwich Compounds of Cyanotrispyrazolylborates – Complexation-induced Ligand Isomerization”; Inorg. Chem. 2007, 46, 8662-8667. DOI:
36. Smucker, B.W.; Van Stipdonk, M.J.; Eichhorn, D.M. “Incorporation of Thiolate Donation Using 2,2'-Dithiodibenzaldehyde: Complexes of a Pentadentate N2S3 Ligand With Relevance to the Active Site of Co Nitrile Hydratase”; J. Inorg. Biochem., 2007, 101, 1537-1542. DOI
35. Zhao, N.; Van Stipdonk, M.J.; Eichhorn, D.M. “Syntheses and Crystal Structures of 3-tert-butyl-4-cyano Pyrazole and its Complexes with Cobalt(II), Manganese(II), and Copper(II)”; Polyhedron, 2007, 26, 2449-2454. DOI
34. Kirgan, R.; Moore, C.; Eichhorn, D.M.; Rillema, D.P. “4-Acetylresorcinol”; Acta Cryst. 2007, E63, o4252. DOI
33. Zhao, N.; Eichhorn, D.M. “Dichlorobis(3,5-dimethylpyrazole)copper(II)” Acta Cryst. 2005, E61, m822-m823. DOI
32. Villegas, J.M.; Stoyanov, S.R.; Moore, C.E.; Eichhorn, D.M.; Rillema, D.P. “fac-Tricarbonyl(2,9-dimethyl-1,10-phenanthroline)(2,6-dimethylphenyl-isocyanide)rhenium(I) hexafluorophosphate” Acta Cryst. 2005, E61, m533-m534. DOI
31. Zhong, J.; Lai, Z.; Groutas, C. S.; Wong, T.; Gan, X.; Alliston, K. R.; Eichhorn, D.; Hoidal, J. R.; Groutas, W. C. “Serendipitous Discovery of an Unexpected Rearrangement Leads to Two New Classes of Potential Protease Inhibitors” Bioorg. Med. Chem. 2004, 12, 6249-6254.
30. Oshin, K.; Landis, A. M.; Smucker, B. W.; Eichhorn, D. M.; Rillema, D. P. “fac-Bipyridyltricarbonyl(pyridine)rhenium(I) trifluoromethanesulfonate” Acta Cryst. 2004, E60, m1126-m1127. DOI
29. Eller, C.; Smucker, B. W.; Kirgan, R.; Eichhorn, D. M.; Rillema, D. P. "5,5'-Dimethyl-2,2'-bipyrazine"; Acta Cryst. 2004, E60, o433-o434. DOI
28. Siemer, C. J.; VanStipdonk, M. J.; Kahol, P. K.; Eichhorn, D. M.; "A Coordination Polymer from a Cyanoscorpionate Complex"; Polyhedron 2004, 23, 235-238.
27. Eichhorn, D. M.; Goswami, N.; "New Synthetic Techniques for the Incorporation of Thiolate Donation in Transition Metal Complexes"; Comm. Inorg. Chem. 2003, 24, 1-13. DOI:
26. Vongtragool, S.; Gorshunov, B.; Dressel, M.; Krzystek, J.; Eichhorn, D. M.; Telser, J.; "Direct Observation of Fine Structure Transitions in a Paramagnetic Nickel(II) Complex Using Far-Infrared Magnetic Spectroscopy: A New Method for Studying High-Spin Transition Metal Complexes"; Inorg Chem. 2003, 42, 1788-1790. DOI:
25. Gu, W.; Jacquamet, L.; Patil, D. S.; Wang, H.-X.; Evans, D. J.; Smith, M. C.; Millar, M.; Koch, S.; Eichhorn, D. M.; Latimer, M.; Cramer, S. P.; "Refinement of the Nickel Site Structure in Desulfovibrio gigas Hydrogenase Using Range-extended EXAFS Spectroscopy"; J. Inorg. Biochem. 2003, 93, 41-51. DOI:
24. Goswami, N.; Van Stipdonk, M. J.; Eichhorn, D. M.; "Formation of an ethylene-bridged bis(benzisothiazole) dication by oxidative decomplexation of Ni(tsalen) with FeCl3"; Inorg. Chem. Commun. 2003, 6, 86-89. DOI:
23. Siemer, C. J.; Meece, F. A.; Armstrong, W. H.; Eichhorn, D. M.; "Iron, Copper, and Cobalt Complexes of Hydrotris(3-phenylpyrazolyl)borate and Dihydrobis(3-phenylpyrazolyl)borate. Synthesis and X-ray Crystallographic Characterization"; Polyhedron 2001, 20, 2637-2646. DOI
22. Siemer, C. J.; Goswami, N.; Van Stipdonk, M. J.; Eichhorn, D. M.; " Dihydrobis(4-cyano-3-phenylpyrazol-1-yl)borate: Homoleptic Mononuclear Cobalt(II) and Copper(II) Complexes With a Cyano-substituted Scorpionate Ligand."; Inorg. Chem., 2001 40, 4081-4084. DOI:
21. McCormick, B. J.; Siemer, C.; Afroz, F.; Wasson, J. R.; Eichhorn, D. M.; Scott, B.; Shah, S.; Noffsinger, K.; Kahol, P. K.; "The Copper Acetylenedicarboxylate System" Synthetic Metals, 2001, 120 , 969-970. DOI:
20. Shan, B.-Z.; Zhao, Q.; Goswami, N.; Eichhorn, D. M.; Rillema, D. P.; "Structure, NMR, and Other Physical and Photophysical Properties of Ruthenium Complexes Containing the 3,3'-Dicarboxyl-2,2'-Bipyridine Ligand"; Coord. Chem. Rev.; 2001, 211, 117-144. DOI:
19. Xue, W.-M.; Goswami, N.; Eichhorn, D. M.; Orizondo, P. L.; Rillema, D. P.; "Synthesis and Luminescence Properties of a Nonsymmetric Ligand-Bridged ReI-ReI Chromophore" Inorg. Chem. 2000, 39, 4460-4467. DOI:
18. Burns, D. H.; Chan, H.-K.; Miller, J. D.; Jayne, C. L; Eichhorn, D. M. " Synthesis, Modification, and Characterization of a Family of Homologs of exo-Calix[4]arene: exo-[n.m.n.m]Metacyclophanes, n,m≥3"; J. Org. Chem., 2000, 65, 5185-5196. DOI:
17. Goswami, N.; Eichhorn, D. M.; "Incorporation of Thiolate Donation Using 2,2'-Dithiodibenzaldehyde: Synthesis of Ni, Fe, and Cu Complexes. Crystal Structures of [M(tsalen)] (tsalen = N,N'-Ethylenebis(thiosalicylidene)imine); M = Cu, Ni) Showing a Tetrahedral Distortion of Cu(tsalen)"Inorg. Chim. Acta , 2000,303, 272-277. DOI
16. Depriest, J.; Zheng, G. Y.; Goswami, N.; Eichhorn, D. M.; Woods, C.; Rillema, D. P.; "Structure, Physical and Photophysical Properties of Platinum(II) Complexes Containing Bidentate Aromatic and Bis(diphenylphosphino)methane as Ligands"; Inorg. Chem. 2000, 39, 1955-1963. DOI:
15. Deviprasad, G. R.; Eichhorn, D. M.; D'Souza, F. "Crystal Structure and Intermolecular Coordination Behavior of a Porphyrin Bearing Hydroquinone Receptor, meso-Mono(hydroquinonyl)triphenylporphyrinatozinc" J. Chem. Crystallogr. 1999 29, 849-853. DOI:
14. Goswami, N.; Eichhorn, D. M.; "A New Method for Incorporating Thiolate Donors into a Metal Coordination Sphere. Synthesis and Crystal Structures of the First Nickel Complexes of an N3S Ligand" Inorg. Chem. 1999, 36, 4329-4333. DOI:
13. Wang, Y.; Eichhorn, D. M.; Goswami, N.; Zhao, Q.; Rillema, D. P.; "Crystal Structure and Physical Properties of a Ruthenium(II) Bipyridine Complex" J. Chem. Crystallog. 1999, 29, 277-281. DOI:
12. Huyett, J.E.; Choudhury, S.B.; Eichhorn, D. M.; Bryngelson, P.A.; Maroney, M.J.; Hoffman, B.M.; "Pulsed ENDOR and ESEEM Study of [Bis(maleonitriledithiolato)nickel]-: An Investigation into the Ligand Electronic Structure" Inorg. Chem. 1998, 37, 1361-1367. DOI:
11. Andersen, K.; Andersen, M.; Anderson, O. P.; Baum, S.; Baumann, T. G.; Beall, L. S.; Broderick, W. E.; Cook, A. S.; Eichhorn, D. M.; Goldberg, D.; Hope, H.; Jarrell, W.; Lange, S. J.; McCubbin, Q. J.; Mani, N. S.; Miller, T.; Garrido Montalban, A.; Rodriquez-Morgade, M. S.; Lee, S.; Nie, H.; Olmstead, M. M.; Sabat, M.; Sibert, J. W.; Stern, C.; White, A. J. P.; Williams, D. B. G.; Williams, D. J.; Barrett, A. G. M.; Hoffman, B. M.; “Star Porphyrazines and Related Multimetallic Macrocycles” J. Heterocyclic Chem. 1998, 35, 1013-1042. DOI:
10. Eichhorn, D. M.; Yang, S.; Jarrell, W.; Baumann, T.; Beall, L.S.; White, A.J.P.; Williams, D.J.; Barrett, A.G.M.; Hoffman, B.M.; “[60]Fullerene and TCNQ Donor-Acceptor Crystals of Octakis(dimethylamino)porphyrazine” J. Chem. Soc., Chem. Commun.1995, 1703-1704.
9. Broderick, W.E.; Eichhorn, D. M.; Liu, X.; Toscano, P.M.; Owen, S.; Hoffman, B.M.; "Three Phases of [Fe(C5Me5)2]+[TCNQ]-: Ferromagnetism in a New Structural Phase" J. Am. Chem. Soc. 1995, 117, 3641-3642. DOI:
8. Broderick, W.E.; Eichhorn, D. M.; Liu, X., Owens, S.; Toscano, P.M.; Hoffman, B.M.; "Ferromagnetism in a New Structural Phase of [Fe(C5Me5)2][TCNQ]" Mol. Cryst. Liq. Cryst. 1995, 273, 17-20. DOI
7. Eichhorn, D. M.; Telser, J.; Stern, C.L.; Hoffman, B.M.; "Influence of Zero-Field Splitting and State Mixing on Ferromagnetic Exchange in the Integrated-Stack Charge-Transfer Salt [Cp*2Fe][Co(HMPA-B)]" Inorg. Chem. 1994, 33, 3533-3537. DOI:
6. Eichhorn, D. M.; Skee, D.C.; Broderick, W.E.; Hoffman, B.M.; "Ferromagnetism in Decamethylchromocenium tetracyanoethylenide" Inorg. Chem. 1993, 32, 491-492. DOI:
5. Eichhorn, D. M., Armstrong, W.H.; "A Remarkably Stable Mononuclear Manganese(III) Hydroxide Complex: [L1MnIII(OH)] (L1=bis(2-hydroxy, 5-nitrobenzyliminopropyl)methylamine)" J. Chem. Soc., Chem. Commun. 1992, 85-87.
4. Cramer, S.P.; deGroot, F.M.F.; Ma, Y.; Chen, C.T.; Sette, F.; Kipke, C.A.; Eichhorn, D. M.; Chan, M.K.; Armstrong, W.H.; Fuggle, J.C. "Ligand Field Strengths and Oxidation States from Manganese L-Edge Spectroscopy" J. Am. Chem. Soc. 1991, 113, 7937-7940.
3. Chambron, J.-C.; Eichhorn, D. M.; Franczyk, T.S.; Stearns, D.M. "Structure of [Hydro(trispyrazolylborato)-triphenylphosphinoiodomethyl] Rhodium(III)"Acta Crystallogr., 1991, C47, 1732-1734. DOI:
2. Low, D.W.; Eichhorn, D. M.; Draganescu, A.; Armstrong, W.H. "Structure and Properties of [Mn9O7(O2CC6H5)13py)2]: A Novel Nonanuclear Mn(III) Oxo-Carboxylate Species Synthesized by Employing an Oxygen Atom Transfer Agent" Inorg. Chem., 1991, 30, 877-878. DOI:
1. Eichhorn, D. M.; Armstrong, W.H. "M{(Hydrotris(3-phenyl-pyrazolyl)borate}2: Sterically Encumbered Iron(II) and Manganese(II) Complexes " Inorg. Chem. 1990, 29, 3607-3612. DOI: