PD Dr. Oliver Janka

[img]http://www.uni-muenster.de/Chemie.ac/janka/research/Research_Fields.jpg

Institut für Chemie

Carl von Ossietzky Universität Oldenburg
Postfach 2503
26111 Oldenburg

Homepage: www.uni-muenster.de/Chemie.ac/janka/welcome.html Raum: W03 3-354 (» Adresse und Lageplan) Sprechzeiten: Dienstags, 13-15 Uhr - nur nach Vereinbarung Tel.: 798-3660 Fax: +40 (0)-441/798-3329

Aktuelle Lehrveranstaltungen

Wintersemester 2017/2018

Sommersemester 2017


Publikationen

BUCHKAPITEL:
[4] R. Pöttgen, O. Janka: ’Thermodynamically controlled synthesis of Bulk Materials: High-
Temperature Methods’ in Handbook of Solid State Chemistry, Wiley, 2017, Volume 2:
Synthesis, im Druck, Manuskriptnummer: HSSC-Vol2-003.R1.
[3] O. Janka*, R. Pöttgen: ’Kinetically controlled synthesis of Bulk Materials: Reactive Fluxes’
in Handbook of Solid State Chemistry, Wiley, 2017, Volume 2: Synthesis, im Druck,
Manuskriptnummer: HSSC-Vol2-012.R1.
[2] O. Janka, S. M. Kauzlarich: ’Zintl Compounds’ in Encyclopedia of Inorganic and Bioinorganic
Chemistry, Wiley, 2013, 1–14.
[DOI: 10.1002/9781119951438.eibc0244.pub2]
[1] Th. Schleid, H. Müller-Bunz, O. Janka: ’Geo-Inspired Phosphors Based on Rare-Earth
Metal(III) Fluorides with Complex Oxoanions: I. Fluoride Oxocarbonates and Oxosilicates’,
in Minerals as Advanced Materials II, Springer, 2012, 353–366.
[DOI: 10.1007/978-3-642-20018-2_33]

PEER-REVIEW PUBLIKATIONEN:
[58] S. Eusterwiemann, C. Doerenkamp, T. Dresselhaus, O. Janka, M. de Oliveira Jr., C.
G. Daniliuc, H. Eckert, J. Neugebauer, R. Pöttgen, A. Studer: ’Strong Intermolecular
Antiferromagnetic Verdazyl-Verdazyl Coupling in the Solid State’ Phys. Chem. Chem. Phys.
2017, angenommen.
[DOI: 10.1039/c7cp02950k]
[57] M. K. Schmitt, O. Janka, R. Pöttgen, H. Huppertz: ’Structure Elucidation and Characterization
of the High-Pressure Nickel Borate Hydroxide NiB3O5(OH)’ Z. Anorg. Allg. Chem.
2017, angenommen.
[DOI: 10.1002/zaac.201700130]
[56] C. Benndorf, H. Eckert, O. Janka*: ’Structural Characterization of Intermetallic Compounds
by 27Al Solid State NMR Spectroscopy’ Acc. Chem. Res. 2017, angenommen.
[DOI: 10.1021/acs.accounts.7b00153]
[55] F. Eustermann, F. Stegemann, K. Renner, O. Janka*: ’Platinum Triangles in the Pt/Al
Framework of the Intermetallic REPt6Al3 (RE = Ce–Nd, Sm, Gd, Tb) Series’ Z. Anorg.
Allg. Chem. 2017, angenommen.
[DOI: 10.1002/10.1002/zaac.201700090]
[54] F. Stegemann, C. Benndorf, Y. Zhang, M. Bartsch, H. Zacharias, B. P. T. Fokwa, H.
Eckert, O. Janka*: ’On Ternary Intermetallics Aurides: CaAu2Al2, SrAu2−xAl2+x and
Ba3Au5+xAl6−x’ Z. Anorg. Allg. Chem. 2017, angenommen.
[DOI: 10.1002/10.1002/zaac.201700103]
[53] S. Eusterwiemann, T. Dresselhaus, O. Janka, C. Doerenkamp, A. Massolle, C. G. Daniliuc,
H. Eckert, R. Pöttgen, J. Neugebauer, A. Studer: ’Ferromagnetic and Antiferromagnetic
Cooperative Effects within a Series of tert-Butyl Substituted 1,5-Diaryl-6-oxo Verdazyl
Radicals’ Chem. Eur. J. 2017, 23, 6069–6082.
[DOI: 10.1002/chem.201700988]
[52] M. K. Schmitt, O. Janka, R. Pöttgen, C. Benndorf, M. de Oliveira Jr., H. Eckert, F.
Pielnhofer, A.-S. Tragl, R. Weihrich, B. Joachim, D. Johrendt, H. Huppertz: ’Mo2B4O9 -
Connecting borate and metal cluster chemistry’ Angew. Chem. Int. Ed. 2017, 56, 6449–6453.
[DOI: 10.1002/anie.201701891] und [DOI: 10.1002/ange.201701891]
[51] M. K. Schmitt, O. Janka, O. Niehaus, T. Dresselhaus, R. Pöttgen, F. Plienhofer, R.
Weihrich, M. Krzhizhanovskaya, S. Filatov, R. Bubnova, L. Bayarjargal, B. Winkler, R.
Glaum, H. Huppertz: ’Synthesis and Characterization of the New High-Pressure Nickel
Borate
-NiB4O7’ Inorg. Chem. 2017, 56, 4217–4228.
[DOI: 10.1021/acs.inorgchem.7b00243]
[50] M. Radzieowski, F. Stegemann, R.-D. Hoffmann, O. Janka*: ’The Monoclinic Superstructure
of the M2Pt6Al15 Series (M = Ca, Sc, Y, La, Lu) ’ Z. Kristallogr. 2017, angenommen.
[DOI: 10.1515/zkri-2017-2050]
[49] M. Radzieowski, T. Block, T. Fickenscher, Y. Zhang, B. P. T. Fokwa, O. Janka*: ’Synthesis,
Crystal and Electronic Structures, Physical Properties and 121Sb and 151Eu Mössbauer
Spectroscopy of the Alumo-Antimonide Zintl-Phase Eu5Al2Sb6’ Mater. Chem. Front. 2017,
angenommen.
[DOI: 10.1039/C7QM00057J]
[48] C. Backes, A. Isaeva, O. Janka: ’Trendberichte: Festkörperchemie 2016’ Nachrichten aus
der Chemie 2017, 65, 255–265.
[DOI: 10.1002/nadc.20174059830]
[47] B. Anke, S. Hund, C. Lorent, O. Janka, T. Block, R. Pöttgen, M. Lerch: ’Synthesis, Crystal
Structure, and Magnetic Properties of Pyrochlore-Type Eu2Ta2(O,N)7+’ Z. Allg. Anorg.
Chem. 2017, angenommen.
[DOI: 10.1002/zaac.201700024]
[46] C. Benndorf, F. Stegemann, S. Seidel, L. Schubert, M. Bartsch, H. Zacharias, B. Mausolf,
F. Haarmann, H. Eckert, R. Pöttgen, O. Janka*: ’Equiatomic AEAuX (AE = Ca–Ba, X
  1. Al–In) Intermetallics – A Systematic Study of the Electronic Structure and Spectroscopic
Properties’ Chem. Eur. J. 2017, 23, 4187–4196.
[DOI: 10.1002/chem.201605838]
[45] S. Seidel, O. Janka, C. Benndorf, B. Mausolf, F. Haarmann, H. Eckert, L. Heletta, R.
Pöttgen: ’Ternary rhombohedral Laves phases RE2Rh3Ga (RE = Y, La–Nd, Sm, Gd–Er)’ Z.
Naturforsch. 2017, 72b, 289–303.
[DOI: 10.1515/znb-2016-0265]
[44] T. Lüdtke, T. Wiedemann, I. Efthimiopoulos, N. Becker, S. Seidel, O. Janka, R. Pöttgen,
R. Dronskowski, M. Koch-Müller, M. Lerch: ’HP-MoO2 – a high-pressure polymorph of
molybdenum dioxide’ Inorg. Chem. 2017, 56, 2321–2327.
[DOI: 10.1021/acs.inorgchem.6b03067]
[43] S. Peschke, V. Weippert, M. Mühlbauer, O. Janka, R. Pöttgen, S. Holenstein, H. Luetkens,
D. Johrendt: ’Flux synthesis, crystal structures, and magnetic ordering of the rare-earth
chromium(II) oxyselenides RE2CrSe2O2 (RE = La–Nd)’ Inorg. Chem. 2017, 56, 2241–2247.
[DOI: 10.1021/acs.inorgchem.6b02895]
[42] S. Seidel, U. Ch. Rodewald, O. Janka, R. Pöttgen: ’Ternary gallides RE4Rh9Ga5,
RE5Rh12Ga7 and RE7Rh18Ga11 (RE = Y, La–Nd, Sm, Gd, Tb) – Intergrowth structures
with MgCu2 and CaCu5 related slabs’ Z. Kristallogr. 2017, 232, 365–374.
[DOI: 10.1515/zkri-2016-2017]
[41] F. Eustermann, R.-D. Hoffmann, O. Janka*: ’Superstructure Formation in PrNi2Al3 and
ErPd2Al3’ Z. Kristallogr. 2017, angenommen.
[DOI: 10.1515/zkri-2016-2023]
[40] F. Stegemann, C. Benndorf, Y. Zhang, M Bartsch, H. Zacharias, B. P. T. Fokwa, H. Eckert,
O. Janka*: ’Network Formation by Condensed Tetrahedral [Au3Al] Units in Na2Au3Al:
Crystal and Electronic Structure, Spectroscopic Investigations and Physical Properties of an
Ordered Ternary Auride’ Inorg. Chem. 2017, 56, 1919–1931.
[DOI: 10.1021/acs.inorgchem.6b02480]
[39] T. M. Atkins, J. H. Walton, M. P. Singh, S. Ganguly, O. Janka, A. Y. Louie, S. M. Kauzlarich:
’EPR and Structural Characterization of Water Soluble Mn2+ doped Si Nanoparticles’ J.
Phys. Chem. C 2017, 121, 1948–1956.
[DOI: 10.1021/acs.jpcc.6b11000]
[38] C. Benndorf, H. Eckert, O. Janka*: ’Ternary Rare-Earth Aluminium Intermetallics RE10TAl3
(RE = Y, Ho, Tm, Lu; T = Fe, Co, Ni, Ru, Rh, Pd, Os, Ir, Pt) with an Ordered anti-Co2Al5
Structure’ Dalton Trans. 2017, 48, 1083–1092.
[DOI: 10.1039/C6DT04314C]
[37] G. Heymann, B. Heying, U. Ch. Rodewald, O. Janka*: ’The high-pressure phase of CePtAl’
Z. Naturforsch. 2017, 72b, 77–82.
[DOI: 10.1016/10.1515/znb-2016-0215]
[36] O. Janka, J. Zaikina, S. Bux, H. Tabatabaifar, H. Yang, N. D. Browing, S. M. Kauzlarich:
’Microstructure Investigations of Yb- and Bi-doped Mg2Si Prepared from Metal Hydrides for
Thermoelectric Applications’ J. Solid State Chem., 2017, 245, 152–159.
[DOI: 10.1016/j.jssc.2016.10.011]
[35] T. Dresselhaus, S. Eusterwiemann, D. R. Matuschek, C. G. Daniliuc, O. Janka, R. Pöttgen,
A. Studer, J. Neugebauer: ’Black-box determination of temperature dependent susceptibilities
for crystalline organic radicals with complex magnetic topologies’ Phys. Chem. Chem. Phys.
2016, 18, 28262–28273.
[DOI: 10.1039/C6CP05875B]
[34] O. Janka*, R.-D. Hoffmann, M. Eilers-Rethwisch, U. Ch. Rodewald, O. Niehaus, R. Pöttgen:
’Revisiting Ce3Pt4Ge6 - Crystal Structure and Physical Properties’ Inorg. Chem. Front. 2016,
3, 1289–1296.
[DOI: 10.1039/C6QI00248J]
[33] J.-P. Schmiegel, T. Block, B. Gerke, T. Fickenscher, R. St. Touzani, B. P. T. Fokwa,
O. Janka*: ’EuAu3Al2: Crystal and Electronic Structures, Spectroscopic, Magnetic and
Magnetocaloric Properties’ Inorg. Chem. 2016, 55, 9057–9064.
[DOI: 10.1021/acs.inorgchem.6b01530]
[32] F. Stegemann, O. Janka*: ’RE16AuxAl13−x with RE = La - Nd, Sm (x  3.37): Synthesis,
Crystal Structure and Physical Properties of an Intermetallic Solid Solution with Barrelane
Analogue Units’ Dalton Trans. 2016, 45, 13863–13871.
[DOI: 10.1039/C6DT02649D]
[31] D. Pfister, K. Schäfer, C. Ott, B. Gerke, R. Pöttgen, O. Janka, M. Baumgartner, R.
Weihrich, A. Efimova, A. Hohmann, P. Schmidt, S. Venkatachalam, L. van Wüllen, U.
Schürmann, L. Kienle, V. Duppel, E. Parzinger, B. Miller, J. Becker, A. Holleitner, T. Nilges:
’Inorganic double helices in semiconducting SnIP’ Adv. Mater. 2016, 28, 9783–9791.
[DOI: 10.1002/adma.201603135]
[30] F. Stegemann, C. Benndorf, R. St. Touzani, B. P. T. Fokwa, O. Janka*: ’Experimental
and Theoretical Investigations of the Polar Intermetallics SrPt3Al2 and Sr2Pd2Al’ J. Solid
State Chem. 2016, 242, 143–150.
[DOI: 10.1016/j.jssc.2016.07.019]
[29] O. Janka, O. Niehaus, R. Pöttgen, B. Chevalier: ’Cerium Intermetallics with TiNiSi-Type
Structure’ Z. Naturforsch. 2016, 71b, 737–764.
[DOI: 10.1515/znb-2016-0101]
[28] M. Radzieowski, C. Benndorf. S. Haverkamp, H. Eckert, O. Janka*: ’On New Ternary
Equiatomic Scandium Transition Metal Aluminum Compounds ScTAl with T = Cr, Ru,
Ag, Re, Pt, and Au’ Z. Naturforsch. 2016, 71b, 553–566.
[DOI: 10.1515/znb-2016-0044]
[27] R. Pöttgen, O. Janka, B. Chevalier: ’Cerium Intermetallics CeTX - Review III’ Z. Naturforsch.
2016, 71b, 165–191.
[DOI: 10.1515/znb-2016-0013]
[26] F. Stegemann, C. Benndorf, R. St. Touzani, B. P. T. Fokwa, O. Janka*: ’Sr2Pd4Al5: Synthesis,
Crystal and Electronic Structures, and Chemical Bonding of a New Polar Intermetallic
Compound’ Eur. J. Inorg. Chem. 2016, 2016, 1108–1114.
[DOI: 10.1002/ejic.201501455]
[25] G. Heymann, B. Heying, U. Ch. Rodewald, O. Janka, H. Huppertz, R. Pöttgen: ’Highpressure
high-temperature crystal growth of equiatomic rare earth stannides RENiSn and
REPdSn’ J. Solid State Chem. 2015, 236, 138–146.
[DOI: 10.1016/j.jssc.2015.06.044]
[24] R.-D. Hoffmann, F. Stegemann, O. Janka*: ’SrPt2Al2 - A (3+2)D-incommensurately
modulated variant of the CaBe2Ge2 type structure’ Z. Kristallogr. 2016, 231, 127–142.
[DOI: 10.1515/zkri-2015-1891]
[23] F. Stegemann, C. Benndorf, T. Bartsch, R. St. Touzani, M. Bartsch, H. Zacharias, B. P. T.
Fokwa, H. Eckert, O. Janka*: ’Ba3Pt4Al4 – Structure, Properties, Theoretical and NMR
Spectroscopic Investigations of a Complex Platinide Featuring Heterocubane [Pt4Al4] Units’,
Inorg. Chem. 2015, 54, 10785–10793.
[DOI: 10.1021/acs.inorgchem.5b01842]
[22] D. D. Zimmermann, H. Grossholz, S. Wolf, O. Janka, A. C. Müller, Th. Schleid: ’Two
Hexagonal Rare-Earth(III) Oxide Fluoride Selenide Structure Types - M6O2F8Se3 (M = La,
Nd) and B-type M2OF2Se (M = Gd, Ho)’ Z. Anorg. Allg. Chem. 2015, 641, 1926–1933.
[DOI: 10.1002/zaac.201500253]
[21] O. Niehaus, O. Janka*: ’Gradual Cerium Valence Change in the Solid Solution
CeRu1−xPdxAl (x = 0.1-0.9)’ Z. Anorg. Allg. Chem. 2015, 641, 1792–1797.
[DOI: 10.1002/zaac.201500139]
[20] C. Benndorf, O. Niehaus, H. Eckert, O. Janka*: ’27Al and 45Sc NMR Spectroscopy on
ScT2Al and Sc(T0.5T’0.5)2Al (T = T’ = Ni, Pd, Pt, Cu, Ag, Au) Heusler Phases and
Superconductivity in Sc(Pd0.5Au0.5)2Al’ Z. Anorg. Allg. Chem. 2015, 641, 168–175.
[DOI: 10.1002/zaac.201400509]
[19] O. Janka, R. E. Baumbach, E. D. Bauer, S. M. Kauzlarich: ’Structure and Physical
Properties of Ce3(Ni/Al/Ga)11 - A New Phase with the La3Al11 Structure Type’ Crystals
2015, 5, 1–8.
[DOI: 10.3390/cryst5010001]
[18] F. Stegemann, C. Benndorf, H. Eckert, O. Janka*: ’New Transition Metal Rich Rare-Earth
Palladium/Platinum Aluminides with RET5Al2 Stoichiometry: Structure, Magnetism and
27Al NMR Spectroscopy’ Z. Naturforsch. 2015, 70b, 101–110.
[DOI: 10.1515/ZNB-2014-0223]
[17] S. Seidel, O. Niehaus, S. F. Matar, O. Janka, B. Gerke, U. Ch. Rodewald, R. Pöttgen:
’The Gallium Intermetallics REPdGa3 (RE = La, Ce, Pr, Nd, Sm, Eu) with SrPdGa3-type
Structure’ Z. Naturforsch. 2014, 69b, 1105–1118.
[DOI: 10.5560/ZNB.2014-4119]
[16] B. Gerke, O. Janka, R. Pöttgen: ’RE6Pd13Zn4 (RE = La–Nd, Sm, Gd, Tb) – New Palladiumrich
Phases with Pd@RE6 Octahedra in bcc Packing’ Z. Anorg. Allg. Chem. 2014, 640,
2747–2752.
[DOI: 10.1002/zaac.201400334]
[15] M. Eilers-Rethwisch, O. Niehaus, O. Janka*: ’Magnetic Ordering Phenomena in the Solid
Solution CePt1−xPdxAl’ Z. Anorg. Allg. Chem. 2014, 640, 153–158.
[DOI: 10.1002/zaac.201300485]
[14] O. Niehaus, U. Ch. Rodewald, P. M. Abdala, R. St. Touzani, B. P. T. Fokwa, O. Janka*:
’Synthesis and Theoretical Investigations of the Solid Solution CeRu1−xNixAl (x = 0.1 -
0.95) Showing Cerium Valence Fluctuations’ Inorg. Chem. 2014, 53, 2471–2480.
[DOI: 10.1021/ic402414f]
[13] S. K. Bux, A. Zevalkink, O. Janka, D. Uhl, S. M. Kauzlarich, J. G. Snyder, J.-P. Fleurial:
’Glass-like lattice thermal conductivity and high thermoelectric efficiency in Yb9Mn4.2Sb9’ J.
Mater. Chem. A 2014, 2, 215–220.
[DOI: 10.1039/C3TA14021K]
[12] H. Grossholz, D. D. Zimmermann, O. Janka, Th. Schleid: ’Oxidfluoridsulfide der Lanthanoide
vom Formeltyp M6O2F8S3 (M = La – Nd, Sm, Gd)’ Z. Naturforsch. 2013, 68b, 751–760.
(auf deutsch)
[DOI: 10.5560/ZNB.2013-3110]
[11] O. Janka, R. E. Baumbach, J. D. Thompson, E. D. Bauer, S. M. Kauzlarich: ’Crystal
Structure, Magnetism and Transport Properties of Ce3Ni25.75Ru3.16Al4.1B10’ J. Solid State
Chem. 2013, 205, 154–159.
[DOI: 10.1016/j.jssc.2013.05.041]
[10] O. Janka, R. E. Baumbach, F. Ronning, J. D. Thompson, E. D. Bauer, S. M. Kauzlarich:
’Crystal structure, magnetic and transport properties of CeRu1−xNixAl (x = 0.5)’ Z. Anorg.
Allg. Chem. 2012, 638, 1996–2000.
[DOI: 10.1002/zaac.201200173]
[09] E. D. Bauer, M. M. Altarawneh, P. H. Tobash, K. Gofryk, O. E. Ayala-Valenzuela, J. N.
Mitchell, R. D. McDonald, C. H. Mielke, F. Ronning, J.-C. Griveau, E. Colineau, R. Eloirdi,
R. Caciuffo, B. L. Scott, O. Janka, S. M. Kauzlarich, J. D. Thompson: ’Localized 5f
electrons in superconducting PuCoIn5: consequences for superconductivity in PuCoGa5’ J.
Phys.: Condens. Matter 2011, 24, 052206.
[DOI: 10.1088/0953-8984/24/5/052206]
[08] C. M. Schurz, F. Lissner, O. Janka, Th. Schleid: ’Synthesis and Crystal Structure of the
N3−-Poor Nitride Selenides with the Formula Type M5NSe6 (M = La – Pr) Containing
Isolated Bitetrahedra N2M6
12+’ Z. Anorg. Allg. Chem. 2011, 637, 1045–1051.
[DOI: 10.1002/zaac.201100033]
[07] H. Grossholz, O. Janka, Th. Schleid: ’Oxidfluoridsulfide der Lanthanide vom Formeltyp
M3OF5S (M = Nd, Sm, Gd – Ho)’ Z. Naturforsch. 2011, 66b. 213–220. (auf deutsch)
[DOI: 10.1515/znb-2011-0301]
[06] O. Janka, H. Müller-Bunz, Th. Schleid: ’Two Ta2O5-Rich Alkali-Metal Lanthanide(III)
Oxotantalates(V): K2LaTa5O15 and NaTm2Ta15O41’ Z. Anorg. Allg. Chem. 2010, 636.
1865–1869.
[DOI: 10.1002/zaac.201000211]
[05] O. Janka, Th. Schleid: ’Two Fluoride-Containing Oxotantalates(V) of the Light Lanthanides:
NdFTa2O6 and La3Cl3TaO5F’ Solid State Sci. 2009, 11, 1992–1997.
[DOI: 10.1016/j.solidstatesciences.2009.07.002]
[04] O. Janka, Th. Schleid: ’Facile Synthesis of Bastnaesite-Type LaF[CO3] and its Thermal
Decomposition to LaOF for Bulk and Eu3+-Doped Samples’ Eur. J. Inorg. Chem. 2009,
357–362.
[DOI: 10.1002/ejic.200800931]
[03] O. Janka, Th. Schleid: ’CuEuFTe und AgBaFTe: Zwei unterschiedliche Münzmetall(I)-
Fluorid-Telluride mit unterschiedlichen M2+-Kationen’ Z. Anorg. Allg. Chem. 2008, 634,
2048. (auf deutsch)
[DOI: 10.1002/zaac.200870080]
[02] O. Janka, Th. Schleid: ’TbFCl2: Das erste Fluoridchlorid der dreiwertigen Lanthanoide’ Z.
Anorg. Allg. Chem. 2008, 634, 31–33. (auf deutsch)
[DOI: 10.1002/zaac.200700360]
[01] H. Müller-Bunz, O. Janka, Th. Schleid: ’Er3O2F5: Ein Erbiumoxidfluorid mit Vernier-
Struktur’ Z. Anorg. Allg. Chem. 2007, 633, 37–39. (auf deutsch)
[DOI: 10.1002/zaac.200600274]