Demir, Selvan - Michigan State University

个人简介

Selvan Demir studied chemistry at the University of Cologne and received her Diploma in 2007. She conducted research on scandium solid state chemistry with Prof. Gerd Meyer and scandium organometallic chemistry with Prof. William J. Evans at the University of California, Irvine earning her Dr. rer. nat. in 2010. In 2011, Selvan accepted a DAAD Postdoctoral Fellowship and began her postdoctoral research on lanthanide-based single-molecule magnets and porous aromatic frameworks with Prof. Jeffrey R. Long at the University of California, Berkeley. She was also a postdoctoral research affiliate at the Lawrence Berkeley National Laboratory working on neptunium, plutonium, and americium chemistry with Dr. David K. Shuh. Subsequently, Selvan took up a junior professorship of inorganic chemistry at the University of Göttingen. In January 2019, she moved to East Lansing and is currently an assistant professor of chemistry. Her research interests are in the areas of synthetic organometallic chemistry and magnetism.

研究领域

Radical-Bridged Single-Molecule Magnets Single-molecule magnets (SMMs) are molecules that behave like nanoscopic bar magnets. They are interesting due to various potential applications in high-density information storage, molecular spintronics, and magnetic refrigeration. The challenge in realizing these applications lies in designing molecular magnets that have much higher operating temperatures than have been obtained currently. Lanthanide ions are particularly well-suited for the design of effective SMM because of their high magnetic anisotropic nature. This property inherently possessed by the lanthanide metals arise from unquenched orbital angular momentum and strong spin-orbit coupling. In order to suppress quantum tunneling relaxation processes that leads to a shortcut of the maximum spin-relaxation barrier and thus, a weaker magnet, a strong exchange coupling is required between the spins. Therefore, a promising route to increase operating temperature of single-molecule magnet is to design lanthanide complexes that simultaneously feature high-magnetic anisotropy and strong magnetic exchange coupling. As a means of achieving strong coupling, radical-bridging ligands with diffused spin orbitals are employed in order to penetrate the core electron density of the deeply buried 4f orbitals within lanthanide ions. We are exploring the utility of various redox-active ligands for the design of radical-bridged multinuclear lanthanide single-molecule magnets. Synthesis, Reactivity, and Magnetism of Uranium Complexes Uranium’s rich chemistry lies in certain properties that results in chemical bonding and reactivity that are not seen with other elements. Uranium-ligand multiple bond compounds have been recognized as promising subjects of study for advancing uranium catalysis and actinide/lanthanide separation by shedding light on the extent of covalency in bonding of 5f orbitals. Covalency is expected to be more prominent when softer ligands are used such as C ligands rather than N or O ligands. Hence, investigating the electronic and reactivity properties of molecular uranium carbenes will improve fundamental knowledge that is crucial to the development of catalysts and new generation nuclear fuels.

近期论文

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Taming Super-Reduced Bi23– Radicals with Rare Earth Cations Zhang, P.; Nabi, R.; Staab, A. K; Chilton, N. F.*; Demir, S.*; J. Am. Chem. Soc. 2023. ASAP Article. DOI: 10.1021/jacs.3c01058. A rare isocyanide derived from an unprecedented neutral yttrium(II) bis(amide) complex Jena, R.; Benner, F.; Delano IV, F., Holmes, D.; McCracken, J.*; Demir, S.*; Odom, A. L.* Chem. Sci. 2023. Advance Article. DOI: 10.1039/D3SC00171G. Guanidinate Rare-Earth Tetraphenylborate Complexes and Their Prospects in Single-Molecule Magnetism Delano IV, F., Demir, S.* Cryst. Growth Des. 2023. ASAP Article. DOI: 10.1021/acs.cgd.2c01258. Linear, Electron-Rich, Homoleptic Rare Earth Metallocene and Its Redox Activity Castellanos, E.; Demir, S.* Inorg. Chem. 2023, 62, 2095–2104. Isolation of the elusive bisbenzimidazole Bbim3–• radical anion and its employment in a metal complex Benner, F.; Demir, S.* Chem. Sci. 2022, 13, 5818-5829. Pursuing the excision of carbon-centred hexanuclear scandium clusters {CSc6} from solid {CSc6}I12Sc Demir, S.*; Wieland T.; Schmitz, S,; , Klein, A.*; Meyer, G. H.* Aust. J. Chem. 2022, 75, 523-531. Taming Salophen in Rare Earth Metallocene Chemistry Castellanos, E.; Benner, F.; Demir, S.* Inorg. Chem. Front. 2022, 9, 1325-1336. Heteroleptic Rare-Earth Tris(metallocenes) Containing a Dibenzocyclooctatetraene Dianion Pugliese, E. R; Benner, F.; Castellanos, E.; Delano IV, F.; Demir, S.* Inorg. Chem. 2022, 61, 2444-2454. Organometallic Lanthanide Bismuth Cluster Single-Molecule Magnets Zhang, P.; Benner, F.; Chilton, N. F.; Demir, S.* Chem 2022, 8, 717–730. Cyclopentadienyls and Phospholyls of the Group 3 Metals and Lanthanides Benner, F.; Delano IV, F.; Pugliese, E. R.; Demir, S.* Comprehensive Organometallic Chemistry IV 2022, 4, 98-184. A Rare Earth Metallocene Containing a 2,2’-Azopyridyl Radical Anion Delano IV, F.; Castellanos, E.; McCracken, J.; Demir, S.* Chem. Sci. 2021, 12, 15219-15228. Uncovering pseudo-doublet ground states innate to U(IV) complexes through magnetism Delano IV, F.; Demir, S.* Chem 2021, 7, 1686-1688. Slow Magnetic Relaxation in Mono- and Bimetallic Lanthanide Tetraimido-Sulfate S(NtBu)42‒ Complexes Jung, J.; Benner, F.; Herbst-Irmer, R.; Demir, S.*; Stalke, D.* Chem. Eur. J. 2021, 27, 12310-12319. Substituent Effects on Exchange Coupling and Magnetic Relaxation in 2,2′-Bipyrimidine Radical-Bridged Dilanthanide Complexes Gould, C. A.; Mu, E.; Vieru, V.; Darago, L. E.; Chakarawet, K.; Gonzalez, M. I.; Demir, S.; Long, J. R.* J. Am. Chem. Soc. 2020, 50, 21197-21209. Trendbericht Anorganische Chemie: Bioanorganische und Koordinationschemie 2018 Daumann, L.*; Hohloch, S.*; Demir, S.* Nachr. Chem. 2019, 67, 65-80. Trendbericht Anorganische Chemie 2017: Koordinationschemie und Bioanorganik Apfel, U.-P.*; Demir, S.*; Berkefeld, A.* Nachr. Chem. 2018, 66, 230-239. Slow magnetic relaxation in a neodymium metallocene tetraphenylborate complex Demir, S.*; Meihaus, K. R.; Long, J. R.* J. Organomet. Chem. 2018, 857, 164-169. Giant Coercivity and High Magnetic Blocking Temperatures for N23‒ Radical-Bridged Dilanthanide Complexes Upon Ligand Dissociation Demir, S.*; Gonzalez, M. I.; Darago, L. E.; Evans, W. J.; Long, J. R.* Nat. Commun. 2017, 8, 2144. Slow Magnetic Relaxation in a Dysprosium Ammonia Metallocene Complex Demir, S.*; Boshart, M. D.; Corbey, J. F.; Woen, D. H.; Gonzalez, M. I.; Ziller, J. W.; Meihaus, K. R.; Long, J. R.*; Evans, W. J.* Inorg. Chem. 2017, 56, 15049−15056. Anorganische Chemie 2016: Koordinationschemie und Bioanorganik Apfel, U.-P.*; Berkefeld, A.*; Demir, S.* Nachr. Chem. 2017, 65, 245-254. A Trinuclear Radical-Bridged Lanthanide Single-Molecule Magnet Gould, C. A.; Darago, L. E.; Gonzalez, M. I.; Demir, S.; Long, J. R.* Angew. Chem. Int. Ed. 2017, 56, 10103−10107. Perspectives on Neutron Scattering in Lanthanide-Based Single-Molecule Magnets and a Case Study of the Tb2(μ-N2) System Prša, K.; Nehrkorn, J.; Corbey, J. F.; Evans, W. J.; Demir, S.; Long, J. R.; Guidi, T.; Waldmann, O.* Magnetochemistry 2016, 2, 45. Solubility of Nanocrystalline Cerium Dioxide: Experimental Data and Thermodynamic Modeling Plakhova, T. V.; Romanchuk, A.; Yakunin, S.; Dumas, T.; Demir, S.; Wang, S.; Minasian, S. G.; Shuh, D. K.; Tyliszczak, T.; Shiryaev, A.; Egorov, A.; Ivanov, V.; Kalmykov, S. N.* J. Phys. Chem. C 2016, 120, 22615−22626. Extraction of Lanthanide and Actinide Ions from Aqueous Mixtures Using a Carboxylic Acid-Functionalized Porous Aromatic Framework Demir, S.; Brune, N. K.; Van Humbeck, J. F.; Mason, J.A.; Plakhova, T. V.; Wang, S.; Tian, G.; Minasian, S.G.; Tyliszczak, T.; Yaita, T.; Kobayashi, T; Kalmykov, S. N.; Shiwaku, H.; Shuh, D. K.; Long, J. R.* ACS Cent. Sci. 2016, 2, 253-265. Radical Ligand-Containing Single-Molecule Magnets Demir, S.; Jeon, I.-R.; Long, J. R.*; Harris, T. D.* Coord. Chem. Rev. 2015, 289−290, 149−176. Exchange Coupling and Magnetic Blocking in Dilanthanide Complexes Bridged by the Multi-Electron Redox-Active Ligand 2,3,5,6-Tetra(2-pyridyl)pyrazine Demir, S.; Nippe, M.; Gonzalez, M. I; Long, J. R.* Chem. Sci. 2014, 5, 4701−4711. Large Spin Relaxation Barriers for the Low-Symmetry Organolanthanide Complexes [Cp2Ln(BPh4)] (Cp = pentamethyl-cyclopentadienyl; Ln = Tb, Dy) Demir, S.; Zadrozny, J. M.; Long, J. R.* Chem. Eur. J. 2014, 31, 9524−9529. Exchange Coupling and Magnetic Blocking in Bipyrimidyl Radical-Bridged Dilanthanide Complexes Demir, S.; Zadrozny, J. M.; Nippe, M.; Long, J. R.* J. Am. Chem. Soc. 2012, 134, 18546−18549. Scandium and Yttrium Metallocene Borohydride Complexes: Comparisons of (BH4)1− vs (BPh4)1− Coordination and Reactivity Demir, S.; Siladke, N. A.; Ziller, J. W.; Evans, W. J.* Dalton Trans. 2012, 41, 9659−9666. Sigma Bond Metathesis Reactivity of Allyl Scandium Metallocenes with Diphenyldichalcogenides, PhEEPh (E = S, Se, Te) Demir, S.; Mueller, T. J.; Ziller, J. W.; Evans, W. J.* Organometallics 2011, 30, 515-518. Tris(polyalkylcyclopentadienyl) Complexes: The Elusive [(η5-C5R5)2M(η1-C5R5)] Structure and Trihapto Cyclopentadienyl Coordination Involving a Methyl Substituent Demir, S.; Mueller, T. J.; Ziller, J. W.; Evans, W. J.* Angew. Chem. Int. Ed. 2011, 50, 515−518. Facile Insertion of N2O into Metal-Carbon Bonds of Metallocene Allyl Complexes to Form (RN2O)1‒ Ligands Demir, S.; Montalvo, E; Ziller, J. W.; Meyer, G.; Evans, W. J.* Organometallics 2010, 29, 6608−6611. Synthesis, Structure and Density Functional Theory Analysis of a Scandium Dinitrogen Complex, [(C5Me4H)2Sc]2(μ–η2:η2-N2) Demir, S.*; Lorenz, S. E.; Fang, M.; Furche, F.; Meyer, G.; Ziller, J. W.; Evans, W. J.* J. Am. Chem. Soc. 2010, 132, 11151−11158.