William W. Shum

B.S. University of Utah
Ph.D candidate, University of Utah


email: s h u m w l @ c h e m . u t a h . e d u


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                            Magnetic Interaction of Molecule-based Materials

Cu(II) Trifluoroacetate Quinoline High Spin Triplet State

Cu(II) Trifluoroacetate Quinoline Antiferromagnetic Singlet State

Interpenetrated Center Cubic Ruthenium Acetate PBA
My research involved using both theoretical and physical methods to study properties of molecule-based materials, from dinuclear and trinuclear metal cluster molecule-based magnets to 3-D Prussian blue analog (PBA) extended structures.
 
The understanding of their electronic structure is essential.  ab initio and density functional theory with broken symmetry method are generally used as computational methods.  The study involve exchange interaction, spin density, spin anisotropy, charge distribution and charge transfer in various spin states.
 
I am also working on synthesize new PBA magnetic materials.

 

 

 


 Publications:

Title Author Journal Year Volume Issue Page
Corner Sharing Tetrahedral Network in Co3(HAT)[N(CN)2]6(OH2)2 (HAT = 1,4,5,8,9,12-Hexaazatriphenylene). Marshall, Shireen R.; Rheingold, Arnold L.; Dawe, Louise N.; Shum, William W.; Kitamura, Chitoshi; Miller, Joel S. Inorganic Chemistry 2002 41 14 3599-3601
Synthesis and Magnetic Properties of 3-D [RuII/III2(O2CMe)4]3[MIII(CN)6] (M = Cr, Fe, Co). Liao, Yi; Shum, William W.; Miller, Joel S. Journal of the American Chemical Society 2002 124 32 9336-9337
Novel coordination of dicyanamide, [N(CN)2]-: preferential binding of the amide nitrogen. Marshall, Shireen R.; Incarvito, Christopher D.; Shum, William W.; Rheingold, Arnold L.; Miller, Joel S. Chemical Communications 2002 24
3006-3007
One- and Two-Step Spin-Crossover Behavior of [FeII(isoxazole)6]2+ and the Structure and Magnetic Properties of Triangular [FeIII3O(OAc)6(isoxazole)3][ClO4]. Hibbs, Wendy; Van Koningsbruggen, Petra J.; Arif, Atta M.; Shum, William W.; Miller, Joel S. Inorganic Chemistry 2003 42 18 5645-5653
Zero-Field Splitting, Field-Dependent Magnetization of Mixed-Valent S = 3/2 Diruthenium(II,III) Tetracarboxylates. Shum, William W.; Liao, Yi; Miller, Joel S. Journal of Physical Chemistry A 2004 108 36 7460-7462
Diruthenium Tetraacetate Monocation, [RuII/III2(O2CMe)4]+, Building Blocks for 3-D Molecule-Based Magnets. Vos, Thomas E.; Liao, Yi; Shum, William W.; Her, Jae-Hyuk; Stephens, Peter W.; Reiff, William M.; Miller, Joel S. Journal of the American Chemical Society 2004 126 37 11630-11639
The myth of cyanide always being a strong-field ligand: Synthesis and structural characterization of homoleptic S = 2 pentacyanochromate(II), [CrII(CN)5]3-, and nonacyanodichromate(II), [CrII(CN)9]5-. Nelson, Kendric J.; Giles, Ian D.; Shum, William W.; Arif, Atta M.; Miller, Joel S. Angewandte Chemie, International Edition 2005 44 20 3129-3132
Structure and Magnetic Properties of meso-Tetraphenylporphinatomanganese(III) Bis(dithiolato)nickelates. L. N. Dawe, L. Turnbow, J. M. Miglioi, M. L. Taliaferro,  W. W. Shum, J. D. Bagnato, L. N. Zakharov, A. L. Rheingold, A. M. Arif, M. Fourmigu, J. S. Miller Inorganic Chemistry 2005 44

Interpenetrating Lattice-structured Magnets Exhibiting Anomalous Magnetic Properties J. S. Miller T. E. Vos, W. W. Shum Advanced Materials 2005 17