Detailed Information on Publication Record
2018
New molecular heptanuclear cobalt phosphonates: synthesis, structures and magnetic properties
DOROSHENKO, Iaroslav, Michal BABIAK, Axel BUCHHOLZ, Helmar GORLS, Winfried PLASS et. al.Basic information
Original name
New molecular heptanuclear cobalt phosphonates: synthesis, structures and magnetic properties
Authors
DOROSHENKO, Iaroslav (804 Ukraine, belonging to the institution), Michal BABIAK (703 Slovakia, belonging to the institution), Axel BUCHHOLZ (276 Germany), Helmar GORLS (276 Germany), Winfried PLASS (276 Germany) and Jiří PINKAS (203 Czech Republic, guarantor, belonging to the institution)
Edition
New Journal of Chemistry, Cambridge, ROYAL SOC. CHEMISTRY, 2018, 1144-0546
Other information
Language
English
Type of outcome
Článek v odborném periodiku
Field of Study
10402 Inorganic and nuclear chemistry
Country of publisher
United Kingdom of Great Britain and Northern Ireland
Confidentiality degree
není předmětem státního či obchodního tajemství
References:
Impact factor
Impact factor: 3.069
RIV identification code
RIV/00216224:14310/18:00103256
Organization unit
Faculty of Science
UT WoS
000435298100025
Keywords in English
cobalt; complex; magnetic; phosphonate
Tags
International impact, Reviewed
Změněno: 23/4/2024 11:24, Mgr. Michal Petr
Abstract
V originále
The synthesis, structures and magnetic properties of two novel heptanuclear homoleptic molecular cobalt phosphonates are described. Reactions between CoCl26H(2)O and (2-{[(E)-(2-hydroxyphenyl)methylidene]amino}propan-2-yl)phosphonate ligand (HSAA(2-)) in methanol lead to the crystalline products [Co-7(SAA)(2)(HSAA)(4)] (1) and [Co-7(SAA)(2)(NaSAA)(4)] (2), which crystallize in the space groups P2(1)/n (1) and P1 (2). Complexes show a similar structure motif - a centered trigonal antiprism composed of seven Co2+ ions with different coordination environments for the central and peripheral atoms. These heptanuclear molecular cages {Co-7} are held together by six phosphonate ligands. The main difference in their molecular cores is the presence of four sodium cations in 2 instead of four phenolic protons in 1. Magnetic measurements reveal a strong magnetic anisotropy for both structures 1 and 2. Above 50 K, both complexes follow the Curie-Weiss law. The low temperature susceptibility data indicate differences in the intramolecular exchange coupling, as ferromagnetic and antiferromagnetic interactions are observed for 1 and 2, respectively. This can be related to structural differences leading to variations in the Co-O-Co bridging angles between the central octahedral and the six peripheral trigonal-bipyramidal Co2+ ions.
Links
| LM2015043, research and development project |
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| LQ1601, research and development project |
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