Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Marcel Kahnes"'
Autor:
Jörg Töpfer, Marcel Kahnes
Publikováno v:
Journal of Magnetism and Magnetic Materials. 480:40-46
Hard/soft magnetic nanocomposites were synthesized with SrAl2Fe10O9 as hard and CoFe2 or Fe as soft magnetic phase. Al-substituted hexaferrite powder with 250 nm particle size is stable in Ar/5%H2 atmosphere at 315 °C, contrary to non-substituted he
Publikováno v:
Materials Chemistry and Physics. 227:83-89
Nanosize CoFe2O4 particles were synthesized via thermal decomposition of a mixed oxalate precursor; the mean ferrite particle size between 5 nm and 35 nm is tailored through variations of the decomposition temperature. Ferrite particles of 22 nm and
Publikováno v:
Journal of Materials Science. 54:1136-1146
Nanosize Sr-hexaferrite particles (SrM) were synthesized via a citrate-based sol–gel route, and the details of the calcination reaction conditions were investigated. Thermal decomposition of a citrate precursor proceeds in a two-step process: at lo
Publikováno v:
Journal of Chromatography B. 974:83-89
Bilirubin oxidation end products (BOXes) appear upon endogenous heme degradation and can be found in the cerebrospinal fluid after hemorrhagic stroke. BOXes are assumed to contribute to delayed cerebral vasospasm and secondary loss of brain tissue. H
Publikováno v:
Journal of Organometallic Chemistry. 696:1618-1625
The reaction of an equimolar mixture of N,N′-bis(2-pyridylmethyl)acetamidine (1) and di(tert-butyl)phosphane with dimethylzinc yields dinuclear bis(methylzinc) bis(2-pyridylmethyl)acetamidinate di(tert-butyl)phosphanide (2). A similar protocol allo
Publikováno v:
Zeitschrift für anorganische und allgemeine Chemie. 637:397-400
Exposure of a THF solution of bis(methylzinc) tert-butylamide bis(2-pyridylmethyl)amide (1) to a carbon dioxide atmosphere leads to formation of dimeric methylzinc bis(2-pyridylmethyl)carbamate (2). The preparation of 2 from 1 and CO2 is a two-step r
Publikováno v:
Organometallics. 29:3490-3499
Zincation of bis(2-pyridylmethyl)amine (dipicolylamine) and phenylacetylene with dimethylzinc yields dimeric [(PhC≡CZn){μ-N(CH2Py)2}]2 (1). The use of bulky bis[bis(trimethylsilyl)methyl]zinc gives...
Publikováno v:
Organometallics. 29:3098-3108
Direct zincation of dipicolylamin (DPA) and alcohols (MeOH, iPrOH, tBuOH) with dialkylzinc gives bis(alkylzinc)alkoxide-di(2-pyridylmethyl)amides {alkyl = methyl (1, 2), trimethylsilylmethyl (3), b...
Autor:
Helmar Görls, Julia Richthof, Leticia González, Daniel Escudero, Matthias Westerhausen, Marcel Kahnes
Publikováno v:
Journal of Organometallic Chemistry. 695:280-290
The reaction of bis(2-pyridylmethyl)amine (II) with t-butylamine and dimethylzinc gives the heteroleptic [(MeZn)2{μ-N(H)tBu}{μ-N(CH2Py)2}] (1). Stoichiometric alcoholysis of 1 with methanol leads to the exchange of the μ-N(H)tBu moiety. Almost qua
Publikováno v:
Inorganica Chimica Acta. 362:4706-4712
The addition reactions of zinc(II) chloride to N-substituted pyridine-2-carbaldimines [Py–CH NR, R = Me (1a), Ph (1b), Bz (1c), allyl (1d)] lead to different complexes dependent on the N-bound substituent R. The 1:1 complexes show molecular structu