Leaching Mechanism of Different Palladium Surface Species in Heck Reactions of Aryl Bromides and Chlorides
Gnad, Christoph; Abram, Andrea; Urstöger, Alexander; Weigl, Florian; Schuster, Michael; Köhler, Klaus, ACS Catal. (2020), 10 (11), 6030–6041.

Efficient water splitting electrolysis on a platinum-free tungsten carbide electrocatalyst in molten CsH₂PO₄ at 350–390 °C
Bretzler, Patrick; Köhler, Klaus; Nikiforov, Aleksey V.; Christensen, Erik; Berg, Rolf Willestofte; Bjerrum,Niels Janniksen, International Journal of Hydrogen Energy (2020), 45 (41), 21262-21272.

Hydrogenation of furfural by noble metal-free nickel modified tungsten carbide catalysts
Bretzler, Patrick; Huber, Michael; Nickl, Simon; Köhler, Klaus, RSC Adv. (2020), 10, 27323.

Manganese containing copper aluminate catalysts: Genesis of structures and active sites for hydrogenation of aldehydes
Dörfelt, Christoph; Hammerton, Michelle; Martin, David; Wellmann, Alexander; Aletsee, Clara C.; Tromp, Moniek; Köhler, Klaus, Journal of Catalysis (2021), 395, 80–90.

Walter Reppe Revival – Identification and Genesis of Copper Acetylides Cu₂C₂ as Active Species in Ethynylation Reactions.
Bruhm, Tobias; Abram, Andrea; Häusler, Johannes; Thomys, Oliver; Köhler, Klaus, Chem. Eur. J. (2021), 27,16834.

Leaching of palladium atoms from small cluster models during Heck reactions – An experimental and theoretical study
Wussow, Katharina; Abram, Andrea; Köhler, Klaus; Chang, Chun-Ran; Genest, Alexander; Li, Jun; Rösch, Notker, Catalysis Communications (2022), 165, 106441.

Copper-Zinc Oxide Catalysts for Aldehyde Hydrogenation by Direct Reductive Activation of Precursors
Hiller, Max; Köhler, Klaus, Chemie Ingenieur Technik (2022), 94, 1720–1726.

Synthesis of methyl palladium complexes on silica as single site catalysts activating C-Cl bonds in heck reactions
Gnad, Christoph; Dachwald, Oliver; Raudaschl-Sieber, Gabriele; Köhler, Klaus, Journal of Catalysis (2019), 375, 257-266.

Targeted Fe‐Doping of Ni−Al Catalysts via the Surface Redox Reaction Technique for Unravelling its Promoter Effect in the CO₂ Methanation Reaction
Burger, Thomas; Augenstein, Hannah M. S.; Hnyk, Franziska; Döblinge, Markus; Köhler, Klaus; Hinrichsen, Olaf, ChemCatChem (2019), 11, 1-15.

CO₂ methanation over Fe- and Mn-promoted co-precipitated Ni-Al catalysts: Synthesis, characterization and catalysis study
Burger, Thomas; Koschany, Franz; Thomys, Oliver; Köhler, Klaus; Hinrichsen, Olaf, Applied Catalysis, A: General (2018), 558, 44-54.

Simultaneous activity and stability increase of co-precipitated Ni–Al CO₂ methanation catalysts by synergistic effects of Fe and Mn promoters
Burger, Thomas; Koschany, Franz; Wenng, Andreas; Thomys, Oliver; Köhler, Klaus; Hinrichsen, Olaf, Catal. Sci. Technol. (2018), 8, 5920-5932.

SOMC grafting of vanadium oxytriisopropoxide (VO(OiPr)3) on dehydroxylated silica; analysis of surface complexes and thermal restructuring mechanism
Högerl, Manuel P.; Goh, Li Min Serena; Abou-Hamad, Edy; Barman,  Samir; Dachwald, Oliver; Pasha, Farhan Ahmad; Pelletier, Jeremie; Köhler, Klaus; D'Elia, Valerio; Cavallo, Luigi; Basset, Jean-Marie, RSC Adv. (2018), 8, 20801-20808.

Palladium Nanoparticles Supported on Nitrogen-Doped Carbon Nanotubes as a Release-and-Catch Catalytic System in Aerobic Liquid-Phase Ethanol Oxidation
Dong, Weiwen; Chen, Peirong; Xia, Wei; Weide, Philipp; Ruland, Holger; Kostka, Aleksander; Koehler, Klaus; Muhler, Martin, ChemCatChem (2016), 8(7), 1269.

Single-Site VO_x Moieties Generated on Silica by Surface Organometallic Chemistry: A Way To Enhance the Catalytic Activity in the Oxidative Dehydrogenation of Propane
Barman, Samir; Maity, Niladri; Bhatte, Kushal; Ould-Chikh, Samy; Dachwald, Oliver; Haessner, Carmen; Saih, Youssef; Abou-Hamad, Edy; Llorens, Isabelle; Hazemann, Jean-Louis; Koehler, Klaus; D' Elia, Valerio; Basset, Jean-Marie, ACS Catalysis (2016), 6(9), 5908.

CO₂ Methanation over Supported Ru/Al₂O₃ Catalysts: Mechanistic Studies by In situ Infrared Spectroscopy
Zheng, Jian; Wang, Chengyang; Chu, Wei; Zhou, Yuanlin; Koehler, Klaus, ChemistrySelect (2016), 1(12), 3197.

Catalytic Properties of a Novel Raney-Nickel Foam in the Hydrogenation of Benzene
Doerfelt, Christoph; Kolvenbach, Robin; Wirth, Andreas S.; Albert, Matthias; Koehler, Klaus, Catalysis Letters (2016), 146(12), 2425.

Transition metal carbides (WC, Mo₂C, TaC, NbC) as potential electrocatalysts for the hydrogen evolution reaction (HER) at medium temperatures
Meyer, Simon; Nikiforov, Aleksey V.; Petrushina, Irina M.; Koehler, Klaus; Christensen, Erik; Jensen, Jens Oluf; Bjerrum, Niels J., International Journal of Hydrogen Energy (2015), 40(7), 2905.

Palladium Nanoparticles Supported on Fibrous-Structured Silica Nanospheres (KCC-1): An Efficient and Selective Catalyst for the Transfer Hydrogenation of Alkenes
Qureshi, Ziyauddin S.; Sarawade, Pradip B.; Albert, Matthias; D'Elia, Valerio; Hedhili, Mohamed N.; Koehler, Klaus; Basset, Jean-Marie, ChemCatChem (2015), 7(4), 635.

Space-confined preparation of high surface area tungsten oxide and tungsten nitride inside the pores of mesoporous silica SBA-15
Meyer, Simon; Beyer, Hans; Koehler, Klaus; Jensen, Annemette Hindhede; Christensen, Erik; Bjerrum, Niels J., Microporous and Mesoporous Materials (2015), 211, 147.

Abatement of nitrous oxide by ruthenium catalysts: Influence of the support
Zheng, Jian; Meyer, Simon; Koehler, Klaus, Applied Catalysis, A: General (2015), 505.

Fluoridonitrosyl Complexes of Technetium(I) and Technetium(II). Synthesis, Characterization, Reactions, and DFT Calculations
Balasekaran, Samundeeswari Mariappan; Spandl, Johann; Hagenbach, Adelheid; Koehler, Klaus; Drees, Markus; Abram, Ulrich, Inorganic Chemistry (2014), 53(10), 5117.

Conversion and storage of solar energy: photochemistry and catalysis for the energy supply of the future
Haessner, Carmen; Koehler, Klaus; Wussow, Katharina, Chemie in Unserer Zeit (2014), 48(4), 246.

The effect of Al-doping on ZnO nanoparticles applied as catalyst support
Behrens, Malte; Lolli, Giulio; Muratova, Nelli; Kasatkin, Igor; Haevecker, Michael; Naumann d'Alnoncourt, Raoul; Storcheva, Oksana; Koehler, Klaus; Muhler, Martin; Schloegl, Robert, Physical Chemistry Chemical Physics (2013), 15(5), 1374.

Palladium-catalyzed cross-coupling reactions - a general introduction
Koehler, Klaus; Wussow, Katharina; Wirth, Andreas Sebastian, Edited by Molnar, Arpad, Palladium-Catalyzed Coupling Reactions (2013), 1-30.

Isolated Vanadium surface complexes on aluminum fluoride - A model for the relevance of oxygen atoms of aluminum oxide supports in catalytic oxidation reactions
Haessner, Carmen; Mueller, Barbara; Storcheva, Oksana; Koehler, Klaus, ChemCatChem (2013), 5(11), 3260.

Theoretical study on the leaching of palladium in a CO atmosphere
Chang, Chun-Ran; Zhao, Zhi-Jian; Koehler, Klaus; Genest, Alexander; Li, Jun; Roesch, Notker, Catalysis Science & Technology (2012), 2(11), 2238.

Suzuki Coupling Reactions in Neat Water as the Solvent: Where in the Biphasic Reaction Mixture Do the Catalytic Reaction Steps Occur?
Roehlich, Christoph; Wirth, Andreas S.; Koehler, Klaus, Chemistry - A European Journal (2012), 18(48), 15485-15.

Suzuki Coupling Reactions in Pure Water Catalyzed by Supported Palladium: Relevance of the Surface Polarity of the Support
Soomro, Saeeda S.; Roehlich, Christoph; Koehler, Klaus, Advanced Synthesis & Catalysis (2011), 353(5), 767.

In situ NMR studies of the mechanism of homogeneously and heterogeneously catalyzed Heck reactions of aryl chlorides and bromides
Smirnov, Vladimir V.; Prockl, Sandra S.; Schmidt, Alexander F.; Koehler, Klaus, ARKIVOC (Gainesville, FL, United States) (2011), (8), 225-241. | Language: English, Database: CAPLUS

Different Roles of Surface Nitrates in the Selective Catalytic Reduction of NO by Propane over CoO_x/Al₂O₃ and Ga₂O₃/Al₂O₃: Intermediates or Spectators
He, Chuanhua; Koehler, Klaus, Journal of Physical Chemistry C (2011), 115(4), 1248.

Copper(II) complexes incorporating poly/perfluorinated alkoxyaluminate-type weakly coordinating anions: Syntheses, characterization and catalytic application in stereoselective olefin aziridination
Li, Yang; He, Jiayue; V. Khankhoje; E. Herdtweck; K. Koehler; O. Storcheva; M. Cokoja; F. E. Kuehn, Dalton Transactions (2011), 40(21), 5746.

Decomposition of nitrous oxide by rhodium catalysts: Effect of rhodium particle size and metal oxide support
H. Beyer; J. Emmerich; K. Chatziapostolou; K.Koehler, Applied Catalysis, A: General (2011), 391(1-2), 411.

Acceleration of the Rate of the Heck Reaction through UV- and Visible-Light-Induced Palladium(II) Reduction
M. A. Fredricks; M. Drees; K. Koehler, ChemCatChem, 2010, 2, 1467.

Macrocyclic Palladium(II) Complexes in C-C Coupling Reactions: efficient Catalysis by Controlled Temporary Release of Active Species
Ch. Roehlich; K. Koehler, Synthesis & Catalysis, 2010, 352(139, 2263.

Palladium leaching dependent on reaction parameters in Suzuki-Miyaura coupling reactions catalyzed by palladium supported on alumina under mild reactions conditions
S. S .Soomro; F. L. Ansari; K. Chatziapostolou; K. Koehler, Journal of Catalysis, 2010, 273(2), 138.

NO_x removal by rhodium catalysts supported on carbon nanotubes: Evidence for the stoichiometric reduction of NO₂ and NO by the carbon support
H. Beyer; K. Koehler, Applied Catalysis B Enviromental, 2010, 96(1-2), 110.

Tetraalkylammonium-Free Heck Olefination of Deactivated Chloroarenes by Using a Macrocyclic Catalyst Precursor
Ch. Roehlich; K. Koehler, Chemistry - A European Journal, 2010, 16(8), 2363.
 

Abatement of NO Using Rhodium Catalysts Supported on Carbon Nanotubes: Carbon as Support Material and Reducing Agent
H. Beyer, K. Chatziapostolou, K. Koehler, Topics in Catalysis, 2009, 52(13-20), 1752.

Increased Conversion in the Heck Reaction Under Irradiation with Light
M. A. Fredricks, K. Koehler, Catalysis Letters, 2009, 133(1-2), 23.

Amination of aryl chlorides and fluorides toward the synthesis of aromatic amines by palladium-catalyzed route or transition metal free way: Scopes and limitations
W. Kleist; S. Proeckl; M. Drees; K. Koehler; L. Djakovitch, Journal of Molecular Catalysis A: Chemical, 2009, 303(1-2), 15.

Pd/MO_x materials synthesized by sol-gel coprecipitation as catalysts for carbon-carbon coupling reactions of aryl bromides and chlorides
W. Kleist, J.-K. Lee, K. Koehler, European Journal of Inorganic Chemistry, 2009, (2), 261.

Supported palladium catalysts for Suzuki reactions: structure-property relationships, optimized reaction protocol and control of palladium leaching.
K. Koehler, R. Heidenreich, S. S. Soomro, S. Proeckl, Advanced Synthesis & Catalysis, 2008, 350(18), 2930.

Solvent-ligated copper(II) complexes for the homopolymerization of 2-methylpropene
Y. Li, L. Voon, H. Yeong, A. Hijazi, N. Radhakrishnan, K. Koehler, B. Voit, O. Nuyken, F. Kuehn, Chemistry-A European Journal, 2008, 14(26), 7997.

Amination reactions
T. Mallat, A. Baiker, W. Kleist, K. Koehler, Handbook of Heterogeneous Catalysis (2nd Edition), 2008, 7, 3548.

Selective catalytic reduction of NO by C₃H₈ over CoO_x/Al₂O₃: An investigation of structure-activity relationships
C. He, M. Paulus, W. Chu, J. Find, J. Nickl, K. Koehler, Catalysis Today, 2008, 131(1-4), 305.

Heck Reactions of Aryl Chlorides Catalyzed by Ligand Free Palladium Salts
W. Kleist, S. Pröckl, K. Köhler, Catal. Lett., 2008, 128, 197.

Genesis of Coordinatively Unsaturated Palladium Complexes Dissolved from Solid Precursors during Heck Coupling Reactions and Their Role as Catalytically Active Species
K. Köhler, W. Kleist, S. S. Pröckl, Inorg. Chem., 2007, 46, 1876.

A Simple Aqueous Phase Synthesis of High Surface Area Aluminum Fluoride and its Bulk and Surface Structure
W. Kleist, C. Haeßner, O. Storcheva, K. Köhler, Inorg. Chim. Acta, 2006, 359, 4851.

Method for Carrying out CC-Coupling Reactions
J. Krauter, J. Pietsch, P. Panster, K. Köhler, R. Heidenreich, US-Patent 7.102.045, 2006

Selective Catalytic Reduction of NO by Propane over CoO_x/Al₂O₃: An Investigation of the Surface Reactions Using In Situ Infrared Spectroscopy
C. He, K. Köhler, Phys. Chem. Chem. Phys., 2006, 8, 898.

Applications of Heterogeneous Pd Catalysts in Heck Coupling Reactions - Problems, Potential and Recent Advances
K. Köhler, S. S. Pröckl, W. Kleist, Curr. Org. Chem., 2006, 10, 1585.

Design of Highly Active Heterogeneous Palladium Catalysts for the Activation of Aryl Chlorides in Heck Reactions
S. S. Pröckl, W. Kleist, K. Köhler, Tetrahedron, 2005, 61, 9855.

In-situ Infrared Spectroscopic Studies on the Mechanism of the Selective Catalytic Reduction of NO by C₃H₈ over Ga₂O₃/Al₂O₃ - High Efficiency of the Reducing Agents
C. He, M. Paulus, J. Find, J. A. Nickl, H.-J. Eberle, J. Spengler, W. Chu, K. Köhler, J. Phys. Chem. B, 2005, 109, 15906.

Identification of Surface States on Finely Divided Supported Palladium Catalysts by Means of Inelastic Incoherent Neutron Scattering
P. W. Albers, J. G. E. Krauter, D. K. Ross, R. G. Heidenreich, K. Köhler, S. F. Parker, Langmuir, 2004, 20, 8254.

In situ generation of highly active dissolved palladium species from solid catalysts - A concept for the activation of aryl chlorides in the Heck reaction
S. S. Pröckl, W. Kleist, M. A. Gruber, K. Köhler, Angewandte Chemie- International Edition, 2004, 43, 1881-1882.

Heterogeneous catalysts for hydroamination reactions: structure-activity relationship
J. C. Penzien, C. Haeßner, A. Jentys, K. Köhler, T. E. Müller and J. A. Lercher, Journal of Catalysis, 2004, 221, 302-312.

Incorporation of manganese and iron into the zirconia lattice in promoted sulfated zirconia catalysts
F. C. Jentoft, A. Hahn, J. Krohnert, G. Lorenz, R. E. Jentoft, T. Ressler, U. Wild, R. Schlögl, C. Haeßner, K. Köhler, Journal of Catalysis, 2004, 224, 124-137.

A Q- and X-band pulsed electron nuclear double resonance study of the structure and location of the vanadyl ions in the Cs salt of heteropolyacid PVMo₁₁O₄₀
M. Gutjahr, J. Hoentsch, R. Böttcher, O. Storcheva, K. Köhler, A. Pöppl, Journal of the American Chemical Society, 2004, 126, 2905-2911.

Controlled distribution of solid catalysts into two immiscible liquid phases - synthesis and catalytic applications
M. Gruber, M. Wagner, R. Heidenreich, J. G. E. Krauter, N. Coskun, K. Köhler, Catalysis Letters, 2004, 94, 177-180.

Palladium on activated carbon: a valuable heterogeneous catalyst for one-pot multi-step synthesis
M. Gruber, S. Chouzier, K. Köhler, L. Djakovitch, Applied Catalysis A-General, 2004, 265, 161-169.

Pd-catalyzed Heck arylation of cycloalkenes-studies on selectivity comparing homogeneous and heterogeneous catalysts
L. Djakovitch, M. Wagner, C. G. Hartung, M. Beller and K. Köhler, Journal of Molecular Catalysis A: Chemical, 2004, 219, 121-130.

Identification of Surface States on Finely Divided Supported Palladium Catalysts by Means of Inelastic Incoherent Neutron Scattering
P. W. Albers, J. G. E. Krauter, D. K. Ross, R. G. Heidenreich, K. Köhler, S. F. Parker, Langmuir, 2004, 20, 8254-8260.

Interaction of actinides with aluminosilicate colloids in statu nascendi Part I: generation and characterization of actinide(III)-pseudocolloids
M. A. Kim, P. J. Panak, J. I. Yun, J. I. Kim, R. Klenze, K. Köhler, Colloids and Surfaces a-Physicochemical and Engineering Aspects, 2003, 216, 97-108.

A Q-band pulsed ENDOR spectrometer for the study of transition metal ion complexes in solids
J. Hoentsch, Y. Rosentzweig, D. Heinhold, K. Köhler, M. Gutjahr, A. Pöppl, G. Volkel , R. Böttcher , Applied Magnetic Resonance, 2003, 25, 249-259.

Structures of paramagnetic V-IV amido complexes grafted onto metal oxide surfaces: Model systems for heterogeneous vanadium catalysts
S. Grasser, C. Haeßner, K. Köhler, F. Lefebvre, J. M. Basset, Physical Chemistry Chemical Physics, 2003, 5, 1906-1911.

Supported Palladium Catalysts : A Highly Active Catalytic System for CC-Coupling Reactions
J. G. E. Krauter, J. Pietsch, K. Köhler, R. Heidenreich, Catalysis of Organic Reactions, 2002, 379.

Highly active palladium/activated carbon catalysts for Heck reactions: Correlation of activity, catalyst properties, and Pd leaching
K. Köhler, R. G. Heidenreich, J. G. E. Krauter and M. Pietsch, Chemistry-A European Journal, 2002, 8, 622-631.

Control of Pd leaching in Heck reactions of bromoarenes catalyzed by Pd supported on activated carbon
R. G. Heidenreich, J. G. E. Krauter, J. Pietsch, K. Köhler, Journal of Molecular Catalysis A-Chemical, 2002, 182, 499-509.

Pd/C as a highly active catalyst for Heck, Suzuki and Sonogashira reactions
R. G. Heidenreich, K. Köhler, J. G. E. Krauter, J. Pietsch, Synlett., 2002, 1118-1122.

TiOx overlayers on MCM-48 silica by consecutive grafting
M. Widenmeyer, S. Grasser, K. Köhler, R. Anwander, Microporous and Mesoporous Materials, 2001, 44, 327-336.

Elucidation of structure and location of V(IV) ions in heteropolyacid catalysts H₄PVMo₁₁O₄₀ as studied by hyperfine sublevel correlation spectroscopy and pulsed electron nuclear double resonance at W- and X-band frequencies
A. Pöppl, P. Manikandan, K. Köhler, P. Maas, P. Strauch, R. Böttcher, D. Goldfarb, Journal of the American Chemical Society, 2001, 123, 4577-4584.

Transient responses of the local electronic and geometric structures of vanado-molybdo-phoshate catalysts H_3+nPV_nMo_12-nO₄₀ in selective oxidation
J.-K. Lee, J. Melsheimer, S. Berndt, G. Mestl, R. Schlögl, K. Köhler, Applied Catalysis A- General, 2001, 214, 125-148.

Supported palladium as catalyst for carbon-carbon bond construction (Heck reaction) in organic synthesis
K. Köhler, M. Wagner, L. Djakovitch, Catalysis Today, 2001, 66, 105-114.

Heck reaction catalyzed by Pd-modified zeolites
L. Djakovitch, K. Köhler, Journal of the American Chemical Society, 2001, 123, 5990-5999.

Heck reactions catalyzed by oxide-supported palladium - structure-activity relationships
M. Wagner, K. Köhler, L. Djakovitch, S. Weinkauf, V. Hagen, M. Muhler, Topics in Catalysis, 2000, 13, 319-326.

Surface confined ketyl radicals via samarium(II)-grafted mesoporous silicas
I. Nagl, M. Widenmeyer, S. Grasser, K. Köhler, R. Anwander, Journal of the American Chemical Society, 2000, 122, 1544-1545.

Genesis of V⁴⁺ in heteropoly compounds Cs_xH_4-xPVMo₁₁O₄₀ during thermal treatment, rehydration and oxidation of methanol studied by EPR spectroscopy
J. K. Lee, V. Russo, J. Melsheimer, K. Köhler, R. Schlögl, Physical Chemistry Chemical Physics, 2000, 2, 2977-2983.

Vanadia-chromia grafted on titania: structural and catalytic properties in the selective catalytic reduction of NO by NH₃
K. Köhler, J. Engweiler and A. Baiker, Journal of Molecular Catalysis A-Chemical, 2000, 162, 415-422.

First heterogeneously palladium catalysed alpha-arylation of diethyl malonate
L. Djakovitch, K. Köhler, Journal of Organometallic Chemistry, 2000, 606, 101-107.
 

Highly selective palladium-catalyzed Heck reactions of aryl bromides with cycloalkenes
G. Hartung, K. Köhler, M. Beller, Organic Letters, 1999, 1, 709-711.

Heterogeneously catalysed Heck reaction using palladium modified zeolites
L. Djakovitch and K. Köhler, Journal of Molecular Catalysis A-Chemical, 1999, 142, 275-284.

Heck reactions between aryl halides and olefins catalysed by Pd-complexes entrapped into zeolites NaY
L. Djakovitch, W. Heise, K. Köhler, Journal of Organometallic Chemistry, 1999, 584, 16-26.

Amination of aryl bromides catalysed by supported palladium
L. Djakovitch, M. Wagner, K. Köhler, Journal of Organometallic Chemistry, 1999, 592, 225-234.

Magnetic resonance (FMR, EPR) of chromium dioxide supported on titania
K. Köhler, W. Morke, T. Bieruta, Colloids and Surfaces A - Physicochemical and Engineering Aspects, 1998, 144, 81-87.

X-ray absorption spectroscopy of small chromium oxide particles (Cr₂O₃, CrO₂) supported on titanium dioxide
T. Schedel-Niedrig, T. Neisius, C. T. Simmons, K. Köhler, Langmuir, 1996, 12, 6377- 6381.

Coordination environment of copper(II) during the sol-gel process of an aminated alkoxide
M. Klonkowski, K. Köhler, T. Widernik, B. Grobelna, Journal of Materials Chemistry, 1996, 6, 579-584.

The solid-state structure of K₃C₆₀(THF)₁₄
C. Janiak, S. Muhle, H. Hemling, K. Köhler, Polyhedron, 1996, 15, 1559-1563.

Chromia supported on titania .6. Properties of different chromium oxide phases in the catalytic reduction of NO by NH₃ studied by in situ diffuse reflectance FTIR spectroscopy
H. Schneider, M. Maciejewski, K. Köhler, A. Wokaun, A. Baiker, Journal of Catalysis, 1995, 157, 312-320.

Interconversion of CrO2 Formed by Decomposition of Chromium(III) Nitrate Nonahydrate
M. Maciejewski, K. Köhler, H. Schneider, A. Baiker, Journal of Solid State Chemistry, 1995, 119, 13-23.

Chromium Oxide Supported on Titania: Preparation of Highly Dispersed Cr(III) Systems by Grafting
K. Köhler, J. Engweiler, H. Viebrock, A. Baiker, Langmuir, 1995, 11, 3423-30.

Chromia supported on titania .5. Preparation and characterization of supported CrO₂, CrOOH, and Cr₂O₃
K. Köhler, M. Maciejewski, H. Schneider, A. Baiker, Journal of Catalysis, 1995, 157, 301-311.

Adsorption of [Cr(CN)₅NO]^3- on TiO₂ from Solution Studied by Electron-Paramagnetic-Resonance Spectroscopy
K.Köhler, C. W. Schläpfer, A. Vonzelewsky, Journal of the Chemical Society-Faraday Transactions, 1993, 89, 1809-1815.

Chromia Supported on Titania .1. An EPR Study of the Chemical and Structural-Changes Occurring During Catalyst Genesis
K. Köhler, C. W. Schläpfer, A. Von Zelewsky, J. Nickl, J. Engweiler, A. Baiker, Journal of Catalysis, 1993, 143, 201-214.

Coordination Chemistry on Oxide Surfaces
K. Köhler and C. W. Schläpfer, Chemie in unserer Zeit, 1993, 27, 248-255.

Copper(II) in Organically Modified Silicate Gels Prepared by the Sol-Gel Method
M. Klonkowski, K. Köhler, C. W. Schläpfer, Journal of Materials Chemistry, 1993, 3, 105-110.

Single-Crystal EPR and ¹⁵N Powder ENDOR Studies of [C₄H₉)₄N] [Tc^VINBr₄/Tc^VOBr₄]
K. Köhler, R. Kirmse, R. Böttcher, U. Abram, Chemical Physics, 1992, 160, 281- 287.

Determination of Equilibrium-Constants for Ligand-Exchange Reactions of TcNX₄^- (X = Cl, Br) by Means of EPR
K. Köhler, R. Kirmse , U. Abram, Zeitschrift für anorganische und allgemeine Chemie, 1991, 600, 83-87.

Single-Crystal EPR, ³⁵Cl, ³⁷Cl and ¹⁴N, ¹⁵N ENDOR and ESEEM Studies on (Ph₄As)[Tc^VNCl₄/Tc^VOCl₄].2. Determination of the ³⁵Cl, ³⁷Cl and ¹⁴N, ¹⁵N Hyperfine and Quadrupole Tensors by ENDOR and ESEEM
K. Köhler, R. Kirmse, R. Böttcher, U. Abram, M. C. M. Gribnau, C. P. Keijzers, E. De Boer, Chemical Physics, 1990, 143, 83-95.

EPR, ENDOR and ESEEM Studies on [TcNX₄/TcOX₄]^- complexes (X=Cl, Br).
R. Kirmse, K. Köhler, R. Böttcher, R. Münze, S. Abram, M. C. M. Gribnau, C. P. Keijzers, Technetium and Rhenium in Chemistry and Nuclear Medicine, 1990, 3, 305.

Single-Crystal EPR, ³⁵Cl, ³⁷Cl and ¹⁴N, ¹⁵N ENDOR and ESEEM Studies on (Ph₄As) [Tc^VINCl₄/Tc^VOCl₄ ].1. Single-Crystal EPR on (Ph₄As)[Tc^14,15NCl₄/TcOCl₄], and Crystal-Structure of (Ph₄As)[TcOCl₄]
R. Kirmse, K. Köhler, U. Abram, R. Böttcher, L. Golic, E. De Boer, Chemical Physics, 1990, 143, 75-82.

Single-Crystal and Powder EPR Study on Tetra-n-butylammonium Bis(2-thioxo-1,3-dithiole-4,5-diselenolato)Cuprate(II), (n-Bu₄N)₂[⁶³Cu(dsit)₂, Doped into (n-Bu₄N)₂[Ni(dsit)₂]
R. Kirmse, K. Köhler, R. M. Olk, W. Dietzsch, E. Hoyer, G. Zwanenburg, Inorganic Chemistry, 1990, 29, 4073-4076.

Ligand-Exchange Reactions between Metal(II) Chelates of Different Sulfur and Selenium Containing Ligands .9. Exchange Behavior of Chelates of 1,3-Dithiole-2-thione-4,5-dithiolate (dmit) and 1,1-Dichalcogenolates - X-Ray Structure of Bu₄N[Zn(dmit)(Et₂dtc)]
W. Dietzsch, S. Rauer, R. M. Olk, R. Kirmse, K. Köhler, L. Golic, B. Olk, Inorganica Chimica Acta, 1990, 169, 55-62.

Mixed-Ligand Complexes of Technetium .9. Oxidative Ligand-Exchange Reactions on Tetraphenylarsonium-bis(dithiooxalato)nitridotechnetate(V), (Ph₄As)₂[TcN(dto)₂ ]. X-Ray Crystal-Structure of a Further Modification of (Ph₄As)₂[TcN(dto)₂
U. Abram, R. Munze, R. Kirmse, K. Köhler, W. Dietzsch, L. Golic, Inorganica Chimica Acta, 1990, 169, 49-53.

Mixed-Ligand Complexes of Technetium .10. Detection of Nitridotechnetate(VI) Complexes with Coordinated Azido Ligands, ]TcNX_n(N₃)_4-n]^- (X=Cl, Br; n=1-4), by EPR Spectroscopy in Solution
U. Abram, K. Köhler, R. Kirmse, N. B. Kalinichenko, I. N. Marov, Inorganica Chimica Acta, 1990, 176, 139-142.

Coordination Chemistry of 1,3-Dithiole-2-thione-4,5-diselenolate (dsit) - Comparison with 1,3-Dithiole-2-thione-4,5-dithiolate (dmit)
R. M. Olk, A. Rohr, J. Sieler, K. Köhler, R. Kirmse, W. Dietzsch, E. Hoye, B. Olk, Zeitschrift für anorganische und allgemeine Chemie, 1989, 577, 206-216.

Synthesis and Characterization of Technetium(V) Complexes with N-(Thiocarbamoyl)benzamidines. X-Ray Crystal-Structure of Bis[N-(N,N-Diethylthiocarbamoyl)benzamidinato]oxotechnetium(V) Chloride, [TcO(Et₂tcb)₂]Cl
U. Abram, R. Münze, J. Hartung, L. Beyer, R. Kirmse, K. Köhler, J. Stach, H. Behm, P. T. Beurskens, Inorganic Chemistry, 1989, 28, 834-839.

Technetium Complexes Containing Tri(2-Cyanoethyl)Phosphine
U. Abram, P. Mading, R. Kirmse, K. Köhler, Zeitschrift für Chemie, 1989, 29, 183- 184.

Coordination Chemistry of 1,3-Dithiole-2-One-4,5-Dithiolate (dmid) - Comparison with 1,3-Dithiole-2-Thione-4,5-Dithiolate (dmit) - Crystal and Molecular-Structure of Tetrabutylammonium Bis(1,3-Dithiole-2-One-4,5-Dithiolato) Nickelate (III), [n-C₄H₉)₄N][ Ni(dmid)₂ ]
R. M. Olk, W. Dietzsch, K. Köhler, R. Kirmse, J. Reinhold, E. Hoyer, L. Golic, B. Olk, Zeitschrift für anorganische und allgemeine Chemie, 1988, 567, 131-144.

Synthesis, Crystal and Molecular-Structure of Tetraphenylarsonium Bis(Maleonitriledithiolato)Tellurate(II),(AsPh₄)₂[Te(mnt)₂ ], and Single-Crystal Electron-Spin Resonance-Spectra of the System [As₄Ph)₂[Cu/Te(mnt)]
L. Golic, W. Dietzsch, K. Köhler, J. Stach, R. Kirmse, Journal of the Chemical Society-Dalton Transactions, 1988, 97-100.

N,N'-Ethylenebis(Salicylideneiminato)Nitrido Technetium(VI) Chloride, [TcN(salen)]Cl
H. J. Pietzsch, U. Abram, R. Kirmse, K. Köhler, Zeitschrift für Chemie, 1987, 27, 265-266.

^₁₀₃Rh and ³³S Hyperfine Interactions in Tetraphenylarsonium-Bis(Maleonitriledithiolato)Rhodate(II), (Ph₄As)₂ Rh(mnt)₂ : A Single-Crystal EPR-ENDOR Study
R. Kirmse, K. Köhler, J. Stach, W. Dietzsch, R. Böttcher, L. Golic, Chemical Physics Letters, 1987, 133, 81-85.

Electron-Paramagnetic-Res Examination of Vanadyl Complexes
W. Bechmann, E. Uhlemann, R. Kirmse, K. Köhler, Zeitschrift für Anorganische und Allgemeine Chemie, 1987, 544, 215-224.

Ligand-Exchange Reactions on TcNCl₄^-, TcNBr₄^- Complexes
U. Abram, S. Abram, H. Spies, R. Kirmse, J. Stach, K. Köhler, Zeitschrift für Anorganische und Allgemeine Chemie, 1987, 544, 167-180.

Tc(NX)Y₃(Me₂PhP)₂ Complexes (X=O or S,Y=Cl or Br) - Preparation, Characterization and Electron-Paramagnetic-Res Studies
U. Abram, R. Kirmse, K. Köhler, B. Lorenz, L. Kaden, Inorganica Chimica Acta, 1987, 129, 15-20.

Complex-Formation of Technetium with N-(Thiocarbamoyl)Benzamidine Ligands
U. Abram, J. Hartung, L. Beyer, R. Kirmse, K. Köhler, Zeitschrift für Chemie, 1987, 27, 101-102.

Electron-Paramagnetic-Res Investigations on Tetrabutylammonium-Tetrabromonitridotechnetate(VI), (Normal-Bu₄N)[TcNBr₄]
K. Köhler, R. Kirmse, Zeitschrift für Chemie, 1986, 26, 339-340.

Symmetry-Relations of Copper-Chelates with 1-Phenyl-3-Methyl-4-Phenylhydrazono-Pyrazol-5-One and 5-Thione
G. Hinsche, E. Uhlemann, K. Köhler, R. Kirmse, Zeitschrift für Chemie, 1986, 26, 216-216.