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Paul Kögerler
RWTH Aachen University
372Publications
50H-index
8,230Citations
Publications 372
Newest
#1Waqas Ali Shah (QAU: Quaid-i-Azam University)H-Index: 2
#2Sadaf Mir (QAU: Quaid-i-Azam University)
Last.Muhammad Arif Nadeem (QAU: Quaid-i-Azam University)H-Index: 13
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Abstract An uncommon copper(II) hydroxide layers based coordination polymer [Cu3(OH)4(oba)]n (1) (oba = 4,4′-oxybisbenzoate) is synthesized and tested as electro-catalyst for water oxidation reaction under basic conditions. In comparison to classical Cu(OH)2, 1 possesses improved thermal stability of up to ca. 350 °C. Chronoamperometry studies indicate that the catalyst 1 offers an anodic current density 0.1 mA cm-2 at η = 576 mV; a TOF of 2 × 10-3 at 418 mV overpotential value. The catalyst 1 s...
Four polyoxotungstate solid state structures comprising discrete and polymeric architectures based on CeIII complexes of monolacunary Wells-Dawson-type anions [α2-PV2WVI17O61]10–, isolated as [NMe4]7Li4K3[{Ce(H2O)3(α2-P2W17O61)}2]·35H2O (KLT-1), [NMe4]8Na2[Ce(H2O)7]2[{Ce(CH3COO)(H2O)4(α2-P2W17O61)}2]·32.5H2O (NT-2), [NMe4]8K0.5Na1.5[Ce(H2O)7]2[{Ce(H2O)1.5(CH3COO)(α2-P2W17O61)}2]·22H2O (KNT-3) and [NMe4]3Li[Ce(H2O)7][Ce(H2O)4(α2-P2W17O61)]·15H2O (LT-4), illustrate the structural flexibility of Ce...
#1Xiaofeng Yi (Forschungszentrum Jülich)H-Index: 1
#2Natalya V. Izarova (Forschungszentrum Jülich)
Last.Paul Kögerler (Forschungszentrum Jülich)H-Index: 50
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Controlled isomerization of individual {α-P2W12O48} polyoxotungstate building blocks under the constricted conditions of the macrocyclic [P8W48O184]40– archetype ({P8W48}) is linked to site-specific CuII coordination. The derivatives [αγαγ-P8W48O184{Cu(H2O)}2]36– (1), [γγγγ-P8W48O184{Cu(H2O)0.5}4]32– (2), and [αγγγ-P8W48O184{Cu(H2O)}3]34– (3) feature the {αγαγ-P8W48} and the hitherto unknown {γγγγ-P8W48} and {αγγγ-P8W48} isomers based on {α-P2W12} and/or CuII-stabilized {γ-P2W12} units and form ...
The crystal structure and magnetic properties of SrNbxFe12–xO19 (0.00 ≤ x ≤ 0.08) nanohexaferrites (NHFs) fabricated using a sol–gel technique is presented in this study. The X-ray powder diffractometry (XRD) and Infrared spectroscopy (FT-IR) confirmed the formation of M-type hexaferrite phase. The analyses of magnetization versus applied magnetic field, M(H), were performed at room (300 K; RT) and low (10 K) temperatures. The Bohr magneton number (nB), saturation (Ms) and remanent (Mr) magnetiz...
#1Olga Botezat (RWTH Aachen University)H-Index: 4
#2Jan van Leusen (RWTH Aachen University)H-Index: 12
Last.Svetlana G. BacaH-Index: 18
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In the presence of dicyanamide and N-butyldiethanolamine (bdeaH2), Fe(III) and Dy(III) precursors self-assemble into the charge-neutral coordination cluster [Fe6Dy3(ib)9(bdea)6(MeO)6]·MeOH (1) (ib: isobutyrate) featuring an approximately C3-symmetric wheel of edge-sharing FeO6 and DyO6N2 polyhedra. This is followed by a remarkable self-induced conversion of this cluster into the highly condensed globe-shaped coordination cluster [Fe7Dy4O4(OH)3(ib)9.25(bdea)6(NO3)0.75(H2O)] (2) in methanolic solu...
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