Dr. Dennis Wiedemann

• Röntgen- und Neutronenbeugung an Pulvern und Einkristallen
• Ionenleitung in Festkörpern
• Synthese ionischer Festkörper

• Vorlesung „Einführung in die Allgemeine und Anorganische Chemie für Nebenfachstudierende”
• Seminar „Einführung in die Allgemeine und Anorganische Chemie für Nebenfachstudierende”
• Praktikum „Einführung in die Allgemeine und Anorganische Chemie für Nebenfachstudierende”
• Vorlesung „Strukturchemie”

• Spin-Crossover in Metallkomplexen
• Computer in der Chemie
• Rechtliche Aspekte der Chemie
• Chancengleichheit und Diversity

• Hybrid Perovskite at Full Tilt: Structure and Symmetry Relations of the Incommensurately Modulated Phase of Methylammonium Lead Bromide, MAPbBr₃ [10]
  D. Wiedemann, J. Breternitz, D. W. Paley, S. Schorr,
  J. Phys. Chem. Lett. 2021, 12, 2358–2362.
  
  
• Synthesis and Doping Strategies to Improve the Photoelectrochemical Water Oxidation Activity of BiVO₄ Photoanodes [11]
  M. Rohloff, B. Anke, D. Wiedemann, A. C. Ulpe, O. Kasian, S. Zhang, C. Scheu, T. Bredow, M. Lerch, A. Fischer,
  Z. Phys. Chem. 2020, 234, 655–682.
  
  
• And Yet It Moves: A High-Temperature Neutron Diffraction Study of Ion Diffusion in the Inverse Perovskites BaLiX₃ (X = F, H, D) [12]
  D. Wiedemann, E. M. Heppke, A. Franz,
  Eur. J. Inorg. Chem. 2019, 5085–5088.
  
  
• Structural complexities and sodium-ion diffusion in the intercalates Na_xTiS₂: move it, change it, re-diffract it [13]
  D. Wiedemann, E. Suard, M. Lerch,
  RSC Adv. 2019, 9, 27780–27788.
  
  
• Synthesis, characterization, and crystal structure of aquabis(4,4'-dimethoxy-2,2'-bipyridine)[µ-(2R,3R)-tartrato(4–)]dicopper(II) octahydrate [14]
  D. Wiedemann, R.-D. Kulko, A. Grohmann,
  Acta Crystallogr., Sect. E: Crystallogr. Commun. 2019, 75, 972–975.
  
  
• Commensurate Nb₂Zr₅O₁₅: Accessible Within the Field Nb₂Zr_xO_2x+5 After All [15]
  D. Wiedemann, S. Orthmann, M. J. Mühlbauer, M. Lerch,
  ChemistryOpen 2019, 8, 447–450.
  
  
• The inverse perovskite BaLiF₃: single-crystal neutron diffraction and analyses of potential ion pathways [16]
  D. Wiedemann, F. Meutzner, O. Fabelo, S. Ganschow,
  Acta Crystallogr., Sect. B: Struct. Sci., Cryst. Eng. Mater. 2018, 74, 643–650.
  
  
• At the Gates: The Tantalum-Rich Phase Hf₃Ta₂O₁₁ and its Commensurately Modulated Structure [17]
  D. Wiedemann, T. Lüdtke, L. Palatinus, E. Willinger, M. G. Willinger, M. J. Mühlbauer, M. Lerch,
  Inorg. Chem. 2018, 57, 14435–14442.
  
  
• Structural Dynamics of Spin Crossover in Iron(II) Complexes with Extended-Tripod Ligands [18]
  P. Stock, D. Wiedemann, H. Petzold, G. Hörner,
  Inorganics 2017, 5, 60.
  
  
• Invariom-model refinement and Hirshfeld surface analysis of well-ordered solvent-free dibenzo-21-crown-7 [19]
  D. Wiedemann, J. Kohl,
  Acta Crystallogr., Sect. C: Struct. Chem. 2017, 73, 654–659.
  
  
• Diffusion Pathways and Activation Energies in Crystalline Lithium-Ion Conductors [20]
  D. Wiedemann, M. M. Islam, T. Bredow, M. Lerch,
  Z. Phys. Chem. 2017, 231, 1279–1302.
  
  
• HP-MoO₂: A High-Pressure Polymorph of Molybdenum Dioxide [21]
  T. Lüdtke, D. Wiedemann, I. Efthimiopoulos, N. Becker, S. Seidel, O. Janka, R. Pöttgen, R. Dronskowski, M. Koch-Müller, M. Lerch,
  Inorg. Chem. 2017, 56, 2321–2327.
  
  
• Lithium diffusion pathways in metastable ramsdellite-like Li₂Ti₃O₇ from high-temperature neutron diffraction [22]
  D. Wiedemann, S. Nakhal, A. Franz, M. Lerch,
  Solid State Ionics 2016, 293, 37–43.
  
  
• LiBi₃S₅—A Lithium Bismuth Sulfide with Strong Cation Disorder [23]
  S. Nakhal, D. Wiedemann, B. Stanje, O. Dolotko, M. Wilkening, M. Lerch,
  J. Solid State Chem. 2016, 238, 60–67.
  
  
• Unravelling Ultraslow Lithium-Ion Diffusion in γ-LiAlO₂: Experiments with Tracers, Neutrons, and Charge Carriers [24]
  D. Wiedemann, S. Nakhal, J. Rahn, E. Witt, M. M. Islam, S. Zander, P. Heitjans, H. Schmidt, T. Bredow, M. Wilkening, M. Lerch,
  Chem. Mater. 2016, 28, 915–924.
  
  
• Single-crystal neutron diffraction on γ-LiAlO₂: structure determination and estimation of lithium diffusion pathway [25]
  D. Wiedemann, S. Indris, M. Meven, B. Pedersen, H. Boysen, R. Uecker, P. Heitjans, M. Lerch,
  Z. Kristallogr. – Cryst. Mater. 2016, 231, 189–193.
  
  
• Controlled ligand distortion and its consequences for structure, symmetry, conformation and spin-state preferences of iron(II) complexes [26]
  N. Kroll, K. Theilacker, M. Schoknecht, D. Baabe, D. Wiedemann, M. Kaupp, A. Grohmann, G. Hörner,
  Dalton Trans. 2015, 44, 19232–19247.
  
  
• Ternary transition-metal fluoride precursors for the fluorolytic sol–gel route: new insights into speciation and decomposition [27]
  J. Kohl, D. Wiedemann, S. Troyanov, E. Palamidis, M. Lerch,
  Dalton Trans. 2015, 44, 13272–13281.
  
  
• Spin-state dynamics of a photochromic iron(II) complex and its immobilization on oxide surfaces via phenol anchors [28]
  P. Stock, N. Spintig, J. Scholz, J. D. Epping, C. Oelsner, D. Wiedemann, A. Grohmann, G. Hörner,
  J. Coord. Chem. 2015, 68, 3099–3115.
  
  
• Lithium Diffusion Pathways in 3R-Li_xTiS₂: A Combined Neutron Diffraction and Computational Study [29]
  D. Wiedemann, M. M. Islam, S. Nakhal, A. Senyshyn, T. Bredow, M. Lerch,
  J. Phys. Chem. C 2015, 119, 11370–11381.
  
  
• The High-Temperature Transformation from 1T- to 3R-Li_xTiS₂ (x = 0.7, 0.9) as Observed in situ with Neutron Powder Diffraction [30]
  D. Wiedemann, S. Nakhal, A. Senyshyn, T. Bredow, M. Lerch,
  Z. Phys. Chem. 2015, 229, 1275–1288.
  
  
• Thiocyanate Anchors for Salt-like Iron(II) Complexes on Au(111): Promises and Caveats [31]
  P. Stock, A. Erbe, M. Buck, D. Wiedemann, H. Ménard, G. Hörner, A. Grohmann,
  Z. Naturforsch., B: J. Chem. Sci. 2014, 69, 1164–1180.
  
  
• Slowly But Surely—Pathways of Ultraslow Lithium Diffusion in γ-LiAlO₂ [32]
  D. Wiedemann, S. Nakhal, S. Zander, M. Lerch,
  Z. Anorg. Allg. Chem. 2014, 640, 2342.
  
  
• X Marks the Path—Lithium Diffusion Pathways in 3R-Li_xTiS₂ [33]
  D. Wiedemann, S. Nakhal, A. Senyshyn, M. Lerch,
  Z. Anorg. Allg. Chem. 2014, 640, 2342.
  
  
• 3d- and 4d-Metal(II) Complexes of a Tris(pyridyl)ethane-­Derived N₄ Ligand – A Structural Study and Reactivity ­Remarks [34]
  D. Wiedemann, A. Grohmann,
  Z. Anorg. Allg. Chem. 2014, 640, 1632–1640.
  
  
• Bulk spin-crossover in the complex [FeL(NCS)₂] of a tris(pyridyl)ethane-derived N₄-ligand—A temperature-dependent crystallographic study [35]
  D. Wiedemann, A. Grohmann,
  Dalton Trans. 2014, 43, 2406–2417.
  
  
• (OC-6-13)-Difluoridooxidobis(propan-2-ol)(propan-2-olato)vanadium(V) [36]
  J. Kohl, D. Wiedemann,
  Acta Crystallogr., Sect. C: Cryst. Struct. Commun. 2013, 69, 1482–1484.
  
  
• Copper(I) and Iron(II) Complexes of a Novel Tris(pyridyl)­ethane-Derived N₄ Ligand: Aspects of Redox Behaviour and Bioinorganic Physicochemistry [37]
  D. Wiedemann, E. Świętek, W. Macyk, A. Grohmann,
  Z. Anorg. Allg. Chem. 2013, 649, 1483–1490.
  
  
• Iron(II) Complexes of Two Amine/Imine N₅ Chelate Ligands Containing a 1,4-Diazepane Core – To Crossover or Not To Crossover [38]
  M. Schmidt, D. Wiedemann, B. Moubaraki, N. F. Chilton, K. S. Murray, K. R. Vignesh, G. Rajaraman, A. Grohmann,
  Eur. J. Inorg. Chem. 2013, 958–967.
  
  
• Spin Crossover in a Vacuum-Deposited Submonolayer of a Molecular Iron(II) Complex [39]
  M. Bernien, D. Wiedemann, C. F. Hermanns, A. Krüger, D. Rolf, W. Kroener, P. Müller, A. Grohmann, W. Kuch,
  J. Phys. Chem. Lett. 2012, 3, 3431–3434.
  
  
• Synthesis of Ternary Transition Metal Fluorides Li₃MF₆ via a Sol–Gel Route as Candidates for Cathode Materials in Lithium-Ion Batteries [40]
  J. Kohl, D. Wiedemann, S. Nakhal, P. Bottke, N. Ferro, T. Bredow, E. Kemnitz, M. Wilkening, P. Heitjans, M. Lerch,
  J. Mater. Chem. 2012, 22, 15819–15827.
  
  
• Copper Complexes of “Superpodal” Amine Ligands and Reactivity Studies towards Dioxygen [41]
  A. Jozwiuk, E. A. Ünal, S. Leopold, J. P. Boyd, M. Haryono, N. Kurowski, F. V. Escobar, P. Hildebrandt, J. Lach, F. W. Heinemann, D. Wiedemann, E. Irran, A. Grohmann,
  Eur. J. Inorg. Chem. 2012, 3000–3013.
  
  
• Efficient Synthesis of Pentakis- and Tris(pyridine) Ligands [42]
  E. A. Ünal, D. Wiedemann, J. Seiffert, J. P. Boyd, A. Grohmann,
  Tetrahedron Lett. 2012, 53, 54–55.
  
  
• First-Row Transition Metal Complexes of a Novel Pentadentate Amine/Imine Ligand Containing a Hexahydropyrimidine Core [43]
  M. Schmidt, D. Wiedemann, A. Grohmann,
  Inorg. Chim. Acta 2011, 374, 514–520.
  
  
• Bond Activation in Iron(II) and Nickel(II) Complexes of Polypodal Phosphane [44]
  S.-A. Gentschow, S. W. Kohl, W. Bauer, F. W. Heinemann, D. Wiedemann, A. Grohmann,
  Z. Naturforsch., B: Chem. Sci. 2010, 65, 238–250.
  
  
• „... und ehrt mir ihre Kunst!” – Evaluierung historischer und neuer Synthesewege zu 1,5-Dihydroxy-6-oxo-1,6-dihydropyridin-2-carbonsäure und 1,3-Dihydroxy-2-oxo-3-pyrrolin-4-carbonsäure [45]
  D. Wiedemann, A. Grohmann,
  Z. Naturforsch., B: Chem. Sci. 2009, 64, 1276–1288.
  
  
• Substituted Bisphosphanylamines as Ligands in Gold(I) Chemistry—Synthesis and Structures
  [46]D. Wiedemann, M. T. Gamer, P. W. Roesky,
  Z. Anorg. Allg. Chem. 2009, 635, 125–129.

Aktuelle Version

• CalcOPP – A Program for the Calculation of Effective One-Particle Potentials (OPPs) [47]
  D. Wiedemann, Technische Universität Berlin, Berlin (Germany), 2021, doi:10.5281/zenodo.2530345 [48].
  
  

Frühere Versionen

• CalcOPP 1.6.1 – Calculation of 2D OPP from PDF Data [49]
  D. Wiedemann, Technische Universität Berlin, Berlin (Germany), 2015, doi:10.6084/m9.figshare.1461721.
  
  
• CalcOPP-3D 1.0 – Calculation of 3D OPP from PDF Data [50]
  D. Wiedemann, Technische Universität Berlin, Berlin (Germany), 2018, doi:10.6084/m9.figshare.57981301.

• Aus Null mach Eins – Schaltbare Komplexe neuartiger pyridinbasierter Podanden [51]
  D. Wiedemann, Dissertation, Technische Universität Berlin, 2013, doi:10.14279/depositonce-3495.