Search results for "HDI"

Coexistence of long-range antiferromagnetic order and slow relaxation of the magnetization in the first lanthanide complex of a 1,2,4-benzotriazinyl …

2017

The first lanthanide complex of a 1,2,4-benzotriazinyl radical (1), Dy(1)(tbacac)3 (2, tbacac = 2,2,6,6-tetramethyl-3,5-heptane-dionato), was synthesised and found to have an antiferromagnetically ordered ground state with a metamagnetic phase diagram and a critical field of 0.91 T at 1.85 K. The application of a small dc field revealed the single-molecule magnet behaviour of 2, illustrating the coexistence of long-range antiferromagnetic order and slow relaxation of the magnetization. peerReviewed

In-depth structural analysis of lanthanoid coordination networks based on a flexible tripodal zwitterionic isonicotinate ligand

2019

Crystallizing metal–organic frameworks (MOFs) has been studied using a tripodal pyridinecarboxylic acid derivative ligand and selected lanthanoid salts. The zwitterionic ligand, 1,1′,1′′-((2,4,6-trimethylbenzene-1,3,5-triyl)tris(methylene))tris(pyridin-1-ium-4-carboxylate) (TTTPC) introduced as a bromide salt, forms coordination networks in aqueous environments and under ambient conditions with neodymium bromide, trifluoromethanesulfonate (OTf) or acetate (OAc). Seven structures are elucidated in detail using single crystal X-ray crystallography. TTTPC NdBr3, TTTPC NdBr2OTf, TTTPC NdBr(OTf)2 and TTTPC Nd(OTf)3 are porous 3D networks with similar ligand–metal and ligand–anion interactions, b…

A Dysprosium Metallocene Single-Molecule Magnet Functioning at the Axial Limit

2017

Abstraction of a chloride ligand from the dysprosium metallocene [(Cpttt)2DyCl] (1Dy Cpttt=1,2,4‐tri(tert‐butyl)cyclopentadienide) by the triethylsilylium cation produces the first base‐free rare‐earth metallocenium cation [(Cpttt)2Dy]+ (2Dy) as a salt of the non‐coordinating [B(C6F5)4]− anion. Magnetic measurements reveal that [2Dy][B(C6F5)4] is an SMM with a record anisotropy barrier up to 1277 cm−1 (1837 K) in zero field and a record magnetic blocking temperature of 60 K, including hysteresis with coercivity. The exceptional magnetic axiality of 2Dy is further highlighted by computational studies, which reveal this system to be the first lanthanide SMM in which all low‐lying Kramers doub…

Thermal expansion and magnetic properties of benzoquinone-bridged dinuclear rare-earth complexes.

2017

The synthesis and structural characterization of two benzoquinone-bridged dinuclear rare-earth complexes [BQ(MCl2·THF3)2] (BQ = 2,5-bisoxide-1,4-benzoquinone; M = Y (1), Dy (2)) are described. Of these reported metal complexes, the dysprosium analogue 2 is the first discrete bridged dinuclear lanthanide complex in which both metal centres reside in pentagonal bipyramidal environments. Interestingly, both complexes undergo significant thermal expansion upon heating from 120 K to 293 K as illustrated by single-crystal X-ray and powder diffraction experiments. AC magnetic susceptibility measurements reveal that 2 does not show the slow relation of magnetization in zero dc field. The absent of …

Teacher Educators’ Professional Identity in English-Medium Instruction at a Finnish University

2021

Publisher Copyright: © 2021, University of Ljubljana. All rights reserved. Although different forms of English-medium instruction (EMI) are being recognised, the different ways in which EMI can impact the pedagogical activities and expertise of higher education educators have received less attention. Using face-to-face and written interviews with nine teacher educators at a Finnish university, this study examines the most important aspects teacher educators perceive in their work through EMI and how these aspects connect to the understanding of their professional identity. The study is theoretically premised on the interconnected concepts of pedagogical doing, pedagogical being, pedagogical…

Kampanjan sanoma lehdistön kertomana : case: Nuoren Suomen Liikuntaseikkailu maapallon ympäri -kampanja

2006

Nochmals zum (Fach-)Textmuster: von der Kognition zur Beschreibung einzelner Textexemplare

2009

Im Mittelpunkt des Aufsatzes steht die Frage nach der Anwendbarkeit des Textmuster-Begriffs auf die Beschreibung und auf die Analyse von Fachdiskursen. Es wird zunächst einmal kurz an die Diskussion erinnert, welche zur Unterscheidung von Textsorte und Textmuster geführt hat: während der erste Begriff den Text als statische Größe betrachtet, so fokussiert der zweite eher auf das Prozessuale an der Textproduktion und -rezeption. Aus diesem Grund scheint der Textmuster-Begriff für eine kognitive Herangehensweise besonders geeignet zu sein. Auf dieser Basis wird dann jede der traditionellen drei Textmuster-Komponenten unter die Lupe genommen (handlungstypisch-illokutive, inhaltlich-proposition…

Effects of activated carbon ageing in three PCB contaminated sediments: Sorption efficiency and secondary effects on Lumbriculus variegatus.

2015

The sorption efficiency and possible secondary effects of activated carbon (AC) (o 63-200 μm) was studied with Lumbriculus variegatus in three PCB contaminated sediments applying long AC-sediment contact time (3 years). AC amendment efficiently reduced PCB bioavailability as determined with both, L. variegatus bioaccumulation test and passive samplers. However, dose related secondary effects of AC on egestion rate and biomass were observed (applied doses 0.25% and 2.5% sediment dry weight). The sorption capacity and secondary effects remained similar when the experiments were repeated after three years of AC-sediment contact time. Further, transmission electron microscopy (TEM) samples reve…

Martti Luther taloudellisena ajattelijana

2018

Protestanttisen kristillisyyden reformaattori Martti Luther (1483–1546) oli teologian professori, mutta hänen ajattelullaan on ollut merkittäviä yhteiskunnallisia vaikutuksia, ja hän käytti säännöllisesti taloudellisia esimerkkejä havainnollistamaan eettisiä opetuksiaan. Luther ymmärsi hintamekanismin toiminnan markkinoiden kysynnän ja tarjonnan tasapainottajana ja puolusti vapaata elinkeinoelämää. Lähimmäisenrakkauden tuli kuitenkin toteutua kaikessa taloudellisessa vaihdannassa, eikä hän hyväksynyt pidäkkeetöntä voiton maksimointia tai ostajan hädänalaisen tilan hyväksikäyttöä. Hän kritisoi voimakkaasti katolisen uskon köyhyysideaalia, luostarilaitosta, koronkiskontaa ja monopolivoimien h…

Di- and Tetrairon(III) μ-Oxido Complexes of an N3S-Donor Ligand: Catalyst Precursors for Alkene Oxidations

2019

The new di- and tetranuclear Fe(III) μ-oxido complexes [Fe 4 (μ-O) 4 (PTEBIA) 4 ](CF 3 SO 3 ) 4 (CH 3 CN) 2 ] (1a), [Fe 2 (μ-O)Cl 2 (PTEBIA) 2 ](CF 3 SO 3 ) 2 (1b), and [Fe 2 (μ-O)(HCOO) 2 (PTEBIA) 2 ](ClO 4 ) 2 (MeOH) (2) were prepared from the sulfur-containing ligand (2-((2,4-dimethylphenyl)thio)-N,N-bis ((1-methyl-benzimidazol-2-yl)methyl)ethanamine (PTEBIA). The tetrairon complex 1a features four μ-oxido bridges, while in dinuclear 1b, the sulfur moiety of the ligand occupies one of the six coordination sites of each Fe(III) ion with a long Fe-S distance of 2.814(6) A. In 2, two Fe(III) centers are bridged by one oxido and two formate units, the latter likely formed by methanol oxidati…