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Prof. Dr. Erhard Kemnitz

Phone +49 (0)30 2093-7555
Fax +49 (0)30 2093-7277
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Institut für Chemie
Humboldt-Universität zu Berlin
Brook-Taylor-Str. 2
12489 Berlin-Adlershof

Administrative Assistant:
Ingrid Rauch
Phone +49 (0)30 2093 7303
Fax +49 (0)30 2093 7468

Journals 1996 - 2000



Synthese, Kristallstruktur und thermischer Abbau von neuen Fluoroaluminaten der Zusammensetzung (NH4)[M(H20)6][AlF6] (M=Zn, Ni), [Zn(H2O)][AlF5(H2O)] und PyH)4(Al2F10)·4H2O
B. Adamczyk, S.I. Troyanov,M. Schneider und E. Kemnitz
Z. Anorg. Allg. Chem., 626 (2000) 2543/48


The Synthesis and Crystal Determination of Two Sodium Monofluorophosphates: NaHPO4·2.5H2O(I) and Na2PO3F·10H2O (II)
H.A. Prescott, S.I.Troyanov, E. Kemnitz
J. Solid State Chem.,156 (2001)  415/21


The reactivity of manganites in 18O isotope exchange reactions
I. A. Koudriashov, G.N. Mazo, I. K. Murwani, S. Scheurell and E. Kemnitz
Therm Anal., 63 (2001) 59/68


Superprotonic high temperature phase and refinement of the low temperature structure of CsHSeO4
M.A. Zakharov, S.I.Troyanov and E. Kemnitz
Z. Kristallogr. 216 (2001) 172/75


Conversion of 1,1,2-trichlorotrifluoroethane to 1,1,1-trichlorotrifluoroethane and 1,1-dichlorotetrafluoroethane over aluminium-based catalysts
H. Bozorg Zadeh, E.Kemnitz, M. Nickkho-Amiry, T. Skapin, J. M. Winfield
J. Fluorine Chem., 107 (2001) 45/52


The Oxygen Mobility and Catalytic Activity of LaMO3+d (M=Cr, Mn, Co) Phases
I.A. Koudriashov, L.V.Borovskikh, G.N. Maso, S. Scheurell, E. Kemnitz
Mat. Res. Soc. Symp. Proc. 602 (2000) 377/83


Synthese und Kristallstruktur von K2(HSO4)(H2PO4), K4(HSO4)3(H2PO4) und Na(HSO4)(H3PO4)
A. Stiewe, E. Kemnitz
Z. Anorg. Allg. 626 (2000) 2004/11


Catalytic Acylation of Aromatics with Carboxylic Ahydrides over Sulfated Zirconia
J. Deutsch, V. Quaschning,E. Kemnitz, A. Auroux, H. Ehwald, H. Lieske
Topics in Catal. 13 (2000) 281/85


b-AlF3 by Au 4f7/2-referenced XPS and XAES
A. Lippitz, O. Böse,E. Kemnitz, W.E.S. Unger
Surface Science Spectra 7 (2000) 1/7


Crystal Structure of Two Modifications of Sodium Pentahydrogendiphosphate NaH5(PO4)2
E.V. Kosterina, V.B.Rybakov, E. Kemnitz, S.I. Troyanov
Kristallografia, 45 (2000) 520/524, Cryst. Reports 45 (2000)  563/567


Phase transition in (NH4)H5(PO4)2
S.I. Troyanov, E.M. Snigirewa, E. Kemnitz
Z. Krist. 215 (2000) 364-367


Neutron diffraction study of K4(HSeO4)3(H2PO4). A comparison with X-ray structure
S.I. Troyanov, I.V. Morozov, M. Reehius, E. Kemnitz
Z. Krist. 215 (2000) 377-380


Perfluorocarbons – Useful Tools for Medicine
St. Rüdiger, U. Groß, E. Kemnitz
Europ. J. Med. Res. 5 (2000) 209-216


Two oxidation states and four different coordinations of iron in an unusual chloro complex. TG-MS, Raman and Mössbauer spectroscopic investigations of the thermal behaviour
M. Feist, R. Kunze,D. Neubert, K. Witke, H. Mehner, E. Kemnitz
Therm. Anal., 361 (2000) 53/60


Alkalimetal Hydrogen Selenate Phosphates M2H3(SeO4)(PO4) (M=Rb or K) and M4H5(SeO4)3(PO4) (M= K or Na)
S.I. Troyanov, I.V. Morozov, V.B. Rybbakov, E. Kemnitz
Kristallographiya  45 (2000) 441 (Rus), Crystallography reports 45 (2000) 398 (Engl.)


The Crystal Structures of Two Hydrogen Monofluorophosphates: CsHPO3F and Cs3(NH4)2(HPO3F)3(PO3F) H.A. Prescott, S.I. Troyanov and E. Kemnitz
Zeitschr. Krist., 215 (2000) 240-245


Fluorine Modified Chromium Oxide and Its Impact on Heterogeneously Catalyzed Fluorination Reactions
B. Adamczyk, O. Boese, N. Weiher, S.L.M. Schroeder, E. Kemnitz,
J. Fluorine Chem., 101 (2000) 239-246 l


Synthesis and crystal structure of zirconium phosphate fluorides with new 2D and 3D structure types
M. Wloka, S.I. Troyanov, E. Kemnitz
J. Solid State Chem., 149 (2000) 21-27


Synthesis and structure determination of Rb2(HSO4)(H2PO4) and Rb4(HSO4)3(H2PO4) by X-ray single and neutron powder diffraction
A. Stiewe, S.I. Troyanov and E. Kemnitz
J. Solid State Chem., 149 (2000) 9-15



Heterogeneously catalysed hydrolytic decomposition of CFCs - how to treat CFCs still deposited in refrigerators and foams?
K.-U. Niedersen, E. Lieske, E. Kemnitz
Green Chemistry, 1 (1999) 225-229


Crystal Structure of K4(HSeO4)3(H2PO4)
S.I. Troyanov, I. Morosov, E. Kemnitz , M. Reehuis
BENSC Experimental Reports 1999, 169


Synthesis and Crystal Structure of Cesium Nitratometalates(II), Cs2[M(NO3)2] (M=Mn, Co, Ni, Zn)
I.V. Morozov, E. Kemnitz, S.I. Troyanov
Z. Anorg. Allg. Chem.625 (1999) 1664/69


Lithium and Rubidium Hydrogen Monofluoroacetates, M[H(CH2FCOO)2]; Synthesis, Crystal Structure and Hydrogen Bonding
E.V. Karpova, A.I. Boltalin, Yu. M. Korenev, E. Kemnitz, S.I. Troyanov
Rus. J. Coord. Cem. 25 (1999) 98-104


Halogenometallate von Übergangselementen mit Kationen stickstoffhaltiger heterozyklischer Basen. VIII
M. Feist, S.I. Tryanov, E. Kemnitz
Z. Anorg. Allg. Chem. 625 (1999)  806-812


Neue 3D-Zirkoniumphosphatfluoride im ZrPOF-1-Strukturtyp
M. Wloka, S.I. Troyanov, E. Kemnitz
Z. Anorg. Allg. 625 (1999) 1028-32


Synthesis of two modifications of (NH4)2SeO4(H3PO4) and their crystal structure as probed by X-ray and neutron diffraction
S.I. Troyanov, I.V. Morozov, M. Reehuis, E. Kemnitz
Zhurn. Neorg. Khim., 44 (1999) 1924/30,  Rus. J. Inorg. Chem. 44 (1999) 2028/34


Synthese und Kristallstruktur von Hydrogensulfaten einwertiger Metalle - Ag(H3O)(HSO4)2, Ag2(HSO4)2(H2SO4), Ag(HSO4) und Hg2(HSO4)2
A. Stiewe, E. Kemnitz, S.I. Troyanov
Z. Anorg. Allg. Chem. 1999, 625, 329-335


Synthesis and Crystal Structure of Sodium Hydrogen Selenates, NaHSeO4 and Na3[H(HSeO4)2](HSeO4)2
M.A. Zakharov, S.I. Troyanov, V.B. Rybakov, L.A. Aslanov, E. Kemnitz
Kristallografia, 44 (1999)  448/451, Cryst. Reports 44 (1999)  408/413


Synthesis and crystal structure of LiHSeO4
M.A. Zakharov, S.I. Troyanov, E. Kemnitz
Zhurn. Neorg. Khim., 44 (1999) 1242/44, Rus. J. Inorg. Chem. 44 (1999) 1170/72


Zwei Oxidationsstufen und vier verschiedene Koordinationen von Eisen in einer Verbindung. Synthese und Kristallstruktur von 1,4-Dimethylpiperazinium-Chloroferrat(II,III): (dmpipzH2)6[FeIICl4]2[FeIIICl4]2[FeIICl5] [FeIIICl6]
M. Feist, S.I. Troyanov, E. Kemnitz
Z. Anorg. Allg. 625 (1999) 141/46


ESR evidence for chemically assisted thermal incorporation of Mn2+ centres into aluminium fluoride lattices
G. Scholz, R. Stösser, S. Sebastian, E. Kemnitz and J. Bartoll
J. Phys. Chem. of Solids 60 (1999)  153/62


Synthesis and crystal structure of metal selenates, Cd(HSeO4)2, CdSeO4, and Na2Se2O7
I.V. Morozov, S.I. Troyanov, A. Stiewe, E. Kemnitz
Zhurn. Neorg. Khim., 44 (1999) 1620/24, Rus. J. Inorg. Chem. 44 (1999) 1536/41


Synthesis and crystal structure of metal hydrogen selenates, K(HSeO4)(H2SeO4)2 and Cs(HSeO4)(H2SeO4)2
S.I. Troyanov, I. Morozov, M.A. Zakharov, E. Kemnitz
Kristallografia, 44 (1999) 607/611, Cryst. Reports 44 (1999) 560/564



S.I. Troyanov, I. Morosov, E. Kemnitz , M. Reehuis;
BENSC Experimental Reports 1998, 133


S.I. Troyanov, A. Stiewe, E. Kemnitz, M. Reehuis, R. Sonntag,
BENSC Experimental Reports 1998, 130


XANES Investigation of Co-precipitated Fe and Cr Fluorides Catalytically Active in Heterogeneous Dehydrochlorination
Böse, B. Adamczyk, K. Fiedler and E. Kemnitz
Catalysis Letters 54 (1998) 211/16


Activation of g2O3 for Catalytic Cl/F Exchange Reactions: In Situ Studies by X-ray Absorption Near-Edge Structure (XANES) Spectroscopy
O. Böse, E. Kemnitz, S.L.M. Schroeder
Jahresbericht HASYLAB 1998


New Hydrogensulfates of Manganese - Mn(HSO4)2, Mn(HSO4)2.H2O and Mn(HSO4)2.(H2SO4)2
A. Stiewe, S. Troyanov and E.Kemnitz
Zeitschr. Krist. 213 (1998) 654/58


New Cesium Hydrogen Selenate-Phosphates. Synthesis and Crystal Structures
S.I. Troyanov, I.V. Morozov, V.B. Rybakov, A. Stiewe, E. Kemnitz
J. Solid State Chem., 141, (1998) 317/22


XANES-Investigations of coprecipitated AlF3/MgF2 phases
I. Grohmann, A. Hess, E. Kemnitz, W. Fentrup, W.E.S. Unger, J.Wong, M. Rowen, T. Tanaka, M. Fröba
J. Mat. Chem, 8 (1998) 1453/57


Properties of Modified Zirconia used as Friedel-Crafts-Acylation Catalysts
V. Quaschning, J. Deutsch, P. Druska, H.-J. Niclas and E. Kemnitz*
J. Catal., 177 (1998) 164


Oxygen exchange of oxides of the multicomponent systems RBa2Cu3Oy (R=Nd,Ho,Y)
A.A. Galkin, G.N. Maso, B.B. Lunin, S. Scheurell, E. Kemnitz
Rus. J. Phys. 72 (1998) 1619


Effect of pre-treatment and fluorination on the morphology, surface properties and catalytic behaviour of chromia aerogels
T. Skapin and E. Kemnitz
J. Non-Crystalline Solids 225 (1998) 163


On sorption and thermal properties of the zirconium phosphate fluoride [(H2en)0.5] [Zr2(PO4)2(HPO4)F].H2O
M. Feist, M. Wloka, M. Epple, E. Post and E. Kemnitz
J. Mat. Chem. 8  (1998) 433


Hydrolytic decomposition of dichlorodifluoromethane on modified zirconium oxide surfaces
A.Hess and E. Kemnitz
Catal. Letters 49 (1998) 199


New Zirconium Phosphate Fluorides - Hydrothermal Synthesis and Crystal Structures
M. Wloka, S.I. Troyanov and E. Kemnitz
J. Solid State Chem. 135 (1998)  293-301


Synthese und Kristllstruktur von Hydrogenselenaten zweiwertiger Metalle - M(HSeO4)2 (M = Mg,Mn,Zn) und M(HSeO4)2.H2O (M = Mn,Cd) I. Morosov, S.Troyanov, A.Stiewe und E. Kemnitz Z. Anorg. Allg. 624 (1998) 135/140


Au 4f7/2 referenced XPS spectral data of 3 phases with aluminium successively substituted by magnesium
O. Böse, E. Kemnitz, A. Lippitz, W.E.S. Unger
Surface Science Spectra 5 (1998) 17



The thermal behaviour of triethylenediammoniumsalts Zum thermischen Verhalten von Triethylendiammonium-Salzen: Eine kombinierte Untersuchung von (trienH2)[CoCl4] und (trienH2)2[(FeCl4)2(m-C2O4)].H2O mittels TG-MS, FT-IR und Raman-Spektroskopie
M. Feist, R. Kunze, D.Neubert, K. Witke and E. Kemnitz,
J. Therm. Anal. 49, (1997) 635


Synthese, Kristallstrukturen und thermisches Verhalten von trien H2)[Mn(H2O)3X3]X.H2O (X=Cl, Br)
M. Feist, S. Troyanov, A.Stiewe, R. Kunze, E. Kemnitz
Z. Naturforsch. 52b (1997) 1094/1102


Oxygen diffusion and isotop exchange behaviour of Nd1+zBa2-zCu3O7-x
A.A. Galkin, G.N. Mazo, A.P. Mozhaev, S. Scheurell, E. Kemnitz
Solid State Ionics 101-103 (1997) 1087/1092


Synthesis of 1,1,1,2-Tetrafluoroethane from Tetrachloroethylen - a Kinetic and Mechanistic Contribution
E.Kemnitz, K-U. Niedersen, A. Kohne
Indian J. Chem. 36 (1997) 498-506


C 1s and Au 4f7/2b referenced XPS binding energy data obtained with different aluminium oxides, -hydroxides and -fluorides
O.Böse, E. Kemnitz, A. Lippitz, W.E.S. Unger
Fresenius Z. f. Analyt. Chem. 358 (1997) 175-179


Isomerization Reaction of on Chromia - a Study of the Active Sites on the Surface
K.-U. Niedersen, E. Schreier, E. Kemnitz
J. Catal. 167 (1997) 210-214


Oxygen Diffusion and Isotope Exchange Behaviour of NdBa2Cu3O7-x
E. Kemnitz, A.A. Galkin,T. Olesch, S. Scheurell, A.P. Mozhaev, G.N. Mazo
J. Thermal. Anal. 48 (1997) 997-1010


[(enH2)1/2][Zr2(PO4)2(HPO4)F].H2O - a unique Zr phosphate fluoride with a cavity structure
E. Kemnitz, M. Wloka, S.I. Troyanov
Angew. Chem. 108 (1996) 2809; Angew. Chem. Int. Ed. 35 (1996) 2677


Surface acidity and catalytic behaviour of modified zirconium and titanium dioxides
A.Hess and E. Kemnitz
Appl. Catal. 149 (1997) 373/89


Heterogeneous Catalyzed Decomposition Reactions of Dichlorodifluoromethane in the Presence of Water on g-Alumina
E.Kemnitz, A. Kohne, E. Lieske
J. Fluorine Chem. 81 (1997) 197-204



Structural Chemistry of Alkaline Metal Hydrogen Sulfates - a Review of New Structural Data, Part II - The Hydrogen Bonding System
E. Kemnitz, C. Werner, S.I. Troyanov
Eur. J. Solid State Inorg. Chem. 33 (6) (1996) 581-596


Structural Chemistry of Alkaline Metal Hydrogen Sulfates - a Review of New Structural Data, Part I - Synthesis, Metal and Sulfur Polyhedra Coordination
E. Kemnitz, C. Werner, S.I. Troyanov
Eur. J. Solid State Inorg. Chem. 33 (6) (1996) 563-580


Fluorinated g-Alumina Aerogels and Xerogels: Characterisation and Catalytic Behaviour
T. Skapin, E. Kemnitz
Catal. Lett. 40 (1996) 241-247


Die Kristallstruktur von 2,4-Diaminovinamidinium-bis-Tetrachloroferrat(III), (C9H16N4)[FeCl4]2)
M. Feist. S.I. Troyanov, E. Kemnitz
Z. Naturforsch. 51b (1996) 1137-1140


Mg and Fe doped chromium fluoride / hydroxyfluoride - Synthesis, charcterization and catalytic activity
B. Adamczyk, A. Hess and E. Kemnitz
J. Mat. Chem. 6 (1996) 1731-1735


Mechanistic Aspects of Isomerization Reactions of 1,1,2,2-Tetrafluoroethane on a CFC-Conditioned Chromia Catalyst
E. Kemnitz, K.-U. Niedersen
J. Fluorine Chem. 79 (1996) 111-119


Synthese und Kristallstruktur von Ba(HSO4)2(H2SO4)3 und Sr(HSO4)2(H2SO4)
C. Werner, S. Troyanov, E. Kemnitz
Z. Naturforsch. 51b (1996) 952-958


Hydrogensulfate mit fehlgeordneten Wasserstoffatomen - Synthese und Struktur von Li[H(HSO4)2](H2SO4)2 sowie Verfeinerung der Struktur von -NaHSO4
C. Werner, S. Troyanov, H. Worzala, E. Kemnitz
Z. anorg. allg. 622 (1996) 337/42


Refinement of crystal structures of sulfuric acid and oxonium hydrogen sulfate
E. Kemnitz, C. Werner, S. Troyanov
Acta Cryst. C52 (1996) 2665-2668


Synthese und Struktur saurer Übergangsmetallsulfate - Ti(H5O2)(SO4)22(H2O) und Zr(H3O)2(SO4)3
S. Troyanov, A. Stiewe, E. Kemnitz
Z. Naturforsch. 51b (1996) 19/24


A New Binuclear Chloroferrate Anion with Octahedral Metal Coordination: Octachloro(m-oxalato)diferrate(III), [(FeCl4)2(m2O4)]4-
M. Feist, S. Troyanov, E. Kemnitz
Inorg. Chem. 35 (1996) 3067/68


Die Kristallstrukturen von 1,4-Dimethylpiperazinium-tetrabromocobaltat(II) und-zinkat(II), (dmpipzH2)[MIIBr4] (M = Co, Zn)
M. Feist, S. Troyanov, E. Kemnitz
Z. Naturforsch. 51b (1996) 9/13


Synthese und Struktur von Zn(HSO4)2(H2SO4)2 und Cd(HSO4)2
E.Kemnitz, C. Werner, A. Stiewe, H. Worzala, S. Troyanov
Z. Naturforsch. 51b (1996) 14/18


Heterogeneous Catalyzed Synthesis of 1,1,1,2-Tetrafluoroethane from 1,1,1,2 Tetrachloroethane - Thermodynamics and Reaction Pathways
A. Kohne, E. Kemnitz
J. Fluorine Chem. 75 (1995) 103/10


Synthese und Struktur von Hydrogensulfaten des Typs M(HSO4)(H2SO4)(mit M=NH4, Rb,Cs)
C. Werner, S. Troyanov, E. Kemnitz, H. Worzala
Z. anorg. allg. 622 (1996) 380/84


Characterization and catalytic behavior of HTB and pyrochlore phases AlF3-x(OH) with aluminium successively replaced by chromium and magnesium
E. Kemnitz, A. Heß, G. Rother, S. Troyanov
J. Catal. 159 (1996) 332/39


X-ray photoelectron and X-ray excited Auger electron spectroscopic analysis of surface modifications of chromia catalysts during heterogeneous chlorine/fluorine exchange
E. Kemnitz, A. Kohne, I. Grohmann, A. Lippitz, A.W.S. Unger
J. Catal. 159 (1996) 270/79
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