Faculty Biography

Dr. Mark M. Turnbull

Mark M. Turnbull

Synthetic Chemistry

Professor of Chemistry
Carlson School of Chemistry
Clark University
Worcester, MA 01610-1477

Office: S307, Sackler Sciences Center
Phone: 508-793-7167
E-mail: mturnbull@clarku.edu

Curriculum Vitae


Professor Turnbull served as a visiting lecturer at the University of Canterbury, Christchurch, NZ in 1995, and as a visiting professor at the Universitat de Barcelona, Spain in 2001-2002.


Ph.D. Brandeis University, 1987
M.S. University of New Hampshire, 1984
B.S. University of New Hampshire, 1978

Current Research

Our research lies in the preparation of new materials and is focused in two areas.

Molecular Magnetism
Over the last two decades, a new field of research has emerged called molecular magnetism. The guiding principle is to use our understanding of structure, bonding and geometry to control the bulk magnetic properties of a material at the molecular level. This is highly interdisciplinary work and involves teams of collaborating organic and inorganic chemists, theoreticians and condensed matter physicists (our group works in collaboration with that of Prof. Christopher Landee in the Physics Dept. as well as several groups around the world, including Spain, Germany, Great Britain and New Zealand).

Low-dimensional Antiferromagnets
The copper oxide-based high temperature superconductors have introduced a new era to the field of conducting materials, but the mechanism of their superconductivity is still not well understood. One theory suggests that the mechanism of the electrical superconductivity is relted to the mechanism of magnetic super-exchange in these compounds. We are working to prepare structurally related complexes which have more moderate ordering tempertures as models for these systems and others where the magnetic interactions are not principally propagatged in 3-dimensions. Of special interests are those materials where the magnetic interactions are not strictly one- or two-dimensional in nature, but whose topology may be described as inter-dimensional, such as ladders, honeycombs and rectangles. We have recently succeeded in preparing a large family of the best examples of magnetic ladders known (at right) and experiments are in progress to determine their properties and whether doping the systems will generate superconducting materials as predicted by theory.

Selected Publications

228) Farris, P.C.*; Wall, A.D.*; Chellali, J.E.*; Chittim, C.L.^; Landee, C.P.; Turnbull, M.M.; Wikaira, J. L. J. Coord. Chem. 2018, 71, 2487-2509. “Copper (II) halide complexes of amino pyridines: syntheses, structures and magnetic properties of (5CAP) 2CuX2 and (5BAP)nCuX2 (X=Cl,Br)”

229) DuBois, R.J.*; Landee, C.P.; Rademeyer, M.; Turnbull, M.M. J. Coord. Chem. 2018, 71, 3534-53. “2-Chloro-3-fluoropyridine copper (II) complexes and the effect of structural changes on magnetic behavior”

231)  Chellali, J.E.*; Keely, C.*; Bell, G.F.*; Dimanno, K.L.*; Tran, T.*; Dickie, D.; Landee, C.P.;  Rademeyer, M.; Turnbull, M.M.; Xiao, F. Polyhedron 2019, 168, 1-10. “Cobalt and zinc halide complexes of 4-chloro and 4-methylaniline: syntheses, structures and magnetic behavior.”(cover article)

235)  Pilichos, E.; Spanakis, E.; Maniaki, E.-K.; Raptopoulou, C.; Psycharis, V.; Turnbull, M.M.; Perlepes, S.P. Magnetochemistry 2019, 5, 39/1-24. “Diversity of Coordination Modes in a Flexible Ditopic Ligand Containing 2-pyridyl, Carbonyl and Hydrazone Functionalities: Mononuclear and Dinuclear Cobalt(III) Complexes, and Tetranuclear Copper(II) and Nickel(II) Clusters”

236) DuBois, R.J.*; Landee, C.P.; Rademeyer, M.; Turnbull, M.M. J. Coord. Chem. 2019, 72, 1785-1809. “Pyridine-based complexes of copper(II) chloride and bromide: ligand conformation effects on crystal structure. Synthesis, structure and magnetic behavior of Cu(2-Cl-3-X’py)2X2 [X, X’= Cl, Br]”

239) Monroe, J.C.#; Landee, C.P.; Turnbull, M.M.; Polson, M.; Wikaira, J.L. Polyhedron 2019, 171, 344-52. “Halide bridged Cu(pyrazine)2 perchlorate layers: Structure and magnetism”

240) Monroe, J.C.#; Turnbull, M.M. J. Coord. Chem. 2019, 72, 3210-21. “Unusual coordination behavior by a hydroxypyridine/pyridone ligand: Synthesis and structure of [ (2-bromo-4-hydroxypyridine)2(2-bromo-1(H)-4-pyridone)2copper(II)] perchlorate • 2(2-bromo-4-hydroxypyridine) • 2(2-bromo-1(H)-4-pyridone)”

241) Monroe, J.C.#; Landee, C.P.; Turnbull, M.M.; Wikaira, J.L. J. Coord. Chem. 2019, 72, 3458-70. “Effects of deuteration on the structure and magnetic properties of (quinolinium)2 tetrabromidocuprate(II) dihydrate”

243) Shakirova, О.G.; Protsenko, A.N.; Protsenko, A.E.; Kuratieva, N.V.; Fowles, S.M.*; Turnbull, M.M. Inorg. Chim. Acta 2020, 470, 119246. “Syntheses, structures and properties of copper(II) and cobalt(II) complexes with 5(3)-amino-2-chloro-3(5)-methylpyridine isomer cations”

244) Abid Derbel, M.; Turnbull, M.M.; Naïli, H.; Rekik, W. Polyhedron 2020, 175, 114220. “A new mixed halide 2d hybrid perovskite: structural, thermal, optic and magnetic properties”

245) Monroe, J.C.#; Landee, C.P.; Rademeyer, M.; Turnbull, M.M.  Inorganics 2020, 8, 18/1-11.  “Copper(II) halide salts with 1-(4’-pyridinium)-pyridinium”

246) Monroe, J.C.#; Landee, C.P.; Carvajal, M.A.; Deumal, M.; Rademeyer, M.; Turnbull, M.M. Inorg. Chem. 2020, 59, 6319-31. “Revisiting the role of hydrogen bonding in the strong dimer superexchange of a 2D copper(II) halide honeycomb-like lattice: Structural and magnetic study”

247) †Witkos, F.E.*; Monroe, J.C.#; Landee, C.P.; Turnbull, M.M.; Wikaira, J.L. Trans. Metal Chem. 2020, 45, 237-43. “Structure and Magnetic Properties of a Serendipitously Synthesized Copper(II) Complex: [Cu(3-Br-2-pyone)6](ClO4)2”

249) Coetzee, S.; Turnbull, M.M.; Landee, C.P.; Novoa, J.J.; Deumal, M.; Vela, S.; Rademeyer, M. Polyhedron 2020, 185, 114603(1-14). “Assessing Cu2L2X4 dimeric moieties as ferromagnetic building blocks in double halide-bridged polymers (X = Cl-, Br- and L = benzamide). An experimental and computational study”

250) †Kupko, N.*; Meehan, K.L.*; Witkos, F.E.*; Hutcheson, H.*; Monroe, J.C.#; Landee, C.P.; Dickie, D.A.; Turnbull, M.M.; Xiao, F. Polyhedron 2020, 187, 114680/1-13. “Cobalt halide complexes of 2-, 3- and 4-methoxyaniline: syntheses, structures and magnetic behavior”

251) Opherden, D.; Nizar, N.*; Richardson, K.#; Monroe, J.C.#; Turnbull, M.M.; Polson, M.; Vela, S.; Blackmore, W.; Goddard, P.A.; Xiao, F.; Lancaster, T.; Williams, R.C.; Gape, P.M.D.; Pratt, F.L.; Blundell, S.J.; Scurschii, I.; Uhlarz, M.; Ponomaryov, A.N.; Zvyagin, S.; Wosnitza, J.; Baenitz, M.; Heinmaa, I.; Stern, R.; Kühne, H.; Landee, C.P. Phys. Rev. B 2020, 102, 064431/1-13. “Extremely well-isolated 2D spin-1/2 antiferromagnetic Heisenberg layers with small exchange coupling in the molecular-based magnet CuPOF”

252) †Kirkman-Davis, E.;* Witkos, F.E.;* Selmani, V.;* Monroe, J.C.;# Landee, C.P.; Turnbull, M.M.; Dawe, L.N.; Polson, M.; Wikaira, J.L. Dalton Trans. 2020, 49, 13693-703. “Pyrazine-bridged Cu(II) chains: diaquabis(n-methyl-2-pyridone)copper(II) perchlorate complexes”

253) Dgachi, S.; Turnbull, M.M.; Mezzadri, F.; Boonmak, J.; Youngme, S.; Norquist, A.J.; Gagoug, Y.; Houcine Naïli, H. Inorg. Chim. Acta 2021, 514, 119997/1-10. “Polymorphism in the metal-organic hybrid (PhCH2NEt3)2[CoBr4]: Synthesis, crystal structures and physico-chemical characterizations”

255)  †Monroe, J.C.;# Landee, C.P.; Turnbull, M.M.; Wikaira, J.L.  J. Coord. Chem. 2020, 73, 2645-63. “Well-isolated pyrazine-bridged copper(II) chains: Synthesis and magneto-structural analysis”

* Clark Undergraduate Student Co-author
# Clark Graduate Student Co-author