[M(18-crown-6)X][N(Tf)2] (M: Zn, Co; X: I, N(Tf)2) with unusual crown-ether coordination

Wolff, Michael W.; Feldmann, Claus

doi:10.1016/j.ica.2014.02.019

Cited by 2 publications

(2 citation statements)

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“…The residual porosity was calculated from the density of the sintered samples, measured using the Archimedes method. A density of 4?41 g cm 23 for the dense Ti-6Al-4V material was determined by measuring a MIMzHIP sample. The porosity of the Ti-45Al-5Nb-0?2B-0?2C samples was determined by optical pore analysis using an Olympus Analysis Pro software.…”

Section: Characterisationmentioning

confidence: 99%

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From titanium to magnesium: processing by advanced metal injection moulding

et al. 2012

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Metal Injection Moulding (MIM) is a good candidate for economic manufacturing of complex shaped components in high quantities. This is especially true for materials which are rather expensive and hard to form like titanium alloys. However, the high affinity to interstitial elements as oxygen and carbon presents a specific challenge with regard to powder purity, handling and sintering as well as to binder system and its removal. In this paper three examples for manufacturing high quality samples of advanced materials are shown in detail. These comprise an optimisation of the well known Ti-6Al-4V alloy with regard to MIM processing and fatigue resistance by adding 0.5 wt% boron powder in order to effect. a reduction in grain size. Secondly, MIM processing of intermetallic Ti-45Al-5Nb-0.2B-0.2C (at %) intended for application in turbine engines and turbochargers. And thirdly, the status of MIM of magnesium alloys is presented. In this case fabrication of biodegradable implants with adjustable porosity is the main motivation for the application of MIM.

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Section: Characterisationmentioning

confidence: 99%

“…Prestudies 23 showed that the introduction of a temporary liquid phase by the addition of Mg-Ca alloy powder of eutectic composition enhances densification significantly. Second, a binder that does not react with magnesium during sintering has to be found.…”

Section: Metal Injection Moulding Of Magnesiummentioning

confidence: 99%

From titanium to magnesium: processing by advanced metal injection moulding

et al. 2012

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MnBr₂/18-crown-6 coordination complexes showing high room temperature luminescence and quantum yield

2016

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The reaction of manganese(ii) bromide and the crown ether 18-crown-6 in the ionic liquid [(n-Bu)3MeN][N(Tf)2] under mild conditions (80-130 °C) resulted in the formation of three different coordination compounds: MnBr2(18-crown-6) (), Mn3Br6(18-crown-6)2 () and Mn3Br6(18-crown-6) (). In general, the local coordination and the crystal structure of all compounds are driven by the mismatch between the small radius of the Mn(2+) cation (83 pm) and the ring opening of 18-crown-6 as a chelating ligand (about 300 pm). This improper situation leads to different types of coordination and bonding. MnBr2(18-crown-6) represents a molecular compound with Mn(2+) coordinated by two bromine atoms and only five oxygen atoms of 18-crown-6. Mn3Br6(18-crown-6)2 falls into a [MnBr(18-crown-6)](+) cation - with Mn(2+) coordinated by six oxygen atoms and Br - and a [MnBr(18-crown-6)MnBr4](-) anion. In this anion, Mn(2+) is coordinated by five oxygen atoms of the crown ether as well as by two bromine atoms, one of them bridging to an isolated (MnBr4) tetrahedron. Mn3Br6(18-crown-6), finally, forms an infinite, non-charged [Mn2(18-crown-6)(MnBr6)] chain. Herein, 18-crown-6 is exocyclically coordinated by two Mn(2+) cations. All compounds show intense luminescence in the yellow to red spectral range and exhibit remarkable quantum yields of 70% (Mn3Br6(18-crown-6)) and 98% (Mn3Br6(18-crown-6)2). The excellent quantum yield of Mn3Br6(18-crown-6)2 and its differentiation from MnBr2(18-crown-6) and Mn3Br6(18-crown-6) can be directly correlated to the local coordination.

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[M(18-crown-6)X][N(Tf)2] (M: Zn, Co; X: I, N(Tf)2) with unusual crown-ether coordination

Cited by 2 publications

References 31 publications

From titanium to magnesium: processing by advanced metal injection moulding

From titanium to magnesium: processing by advanced metal injection moulding

MnBr₂/18-crown-6 coordination complexes showing high room temperature luminescence and quantum yield

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[M(18-crown-6)X][N(Tf)2] (M: Zn, Co; X: I, N(Tf)2) with unusual crown-ether coordination

Cited by 2 publications

References 31 publications

From titanium to magnesium: processing by advanced metal injection moulding

From titanium to magnesium: processing by advanced metal injection moulding

MnBr2/18-crown-6 coordination complexes showing high room temperature luminescence and quantum yield

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Product

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MnBr₂/18-crown-6 coordination complexes showing high room temperature luminescence and quantum yield