Effect of Partial Closing of the Open Face of Cold-Formed Steel Channel Sections

A manganese substituted Anderson type polyoxometalate, [MnMo6O24]9-, tethered with an anthracene photosensitizer was prepared and used as catalyst for CO2 reduction. The polyoxometalate-photosensitizer hybrid complex, obtained by covalent attachment of the sensitizer to only one face of the planar polyoxometalate, was characterized by NMR, IR and mass spectroscopy. Cyclic voltammetry measurements show a catalytic response for the reduction of carbon dioxide, thereby suggesting catalysis at the manganese site on the open face of the polyoxometalate. Controlled potentiometric electrolysis showed the reduction of CO2 to CO with a TOF of ~15 sec-1. Further photochemical reactions showed that the polyoxometalate-anthracene hybrid complex was active for the reduction of CO2 to yield formic acid and/or CO in varying amounts dependent on the reducing agent used. Control experiments showed that the attachment of the photosensitizer to [MnMo6O24]9- is necessary for photocatalysis.<div> </div>

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STRENX SECTION 900

Alloy Digest ◽

10.31399/asm.ad.sa0792 ◽

2017 ◽

Vol 66 (7) ◽

Keyword(s):

Fracture Toughness ◽

High Strength ◽

Bend Strength ◽

Bend Channel ◽

Cold Formed Steel ◽

The Common ◽

Hot Rolled ◽

Common Shape ◽

Minimum Yield ◽

Steel Section

Abstract Strenx Section 900 is a cold-formed steel section made of hot-rolled, high-strength steel with a minimum yield strength of 900 MPa (131 ksi). Its high strength combined with naturally stiff form enables construction of stronger and lighter structures. The common shape is a U-bend channel. This datasheet provides information on composition, physical properties, tensile properties, and bend strength as well as fracture toughness. It also includes information on forming, machining, and joining. Filing Code: SA-792. Producer or source: SSAB Swedish Steel Inc..

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Macropolyhedral Boron-Containing Cluster Chemistry. A Metallathiaborane from S2B17H17: Isolation and Characterisation of [(PMe2Ph)2PtS2B16H16]; A neo-arachno Ten-Vertex Cluster Shape, and the Constitution of the [arachno-B10H15]- Anion

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc20050430 ◽

2005 ◽

Vol 70 (4) ◽

pp. 430-440 ◽

Cited By ~ 9

Author(s):

Michael J. Carr ◽

Michael G. S. Londesborough ◽

Jonathan Bould ◽

Ivana Císařová ◽

Bohumil Štíbr ◽

...

Keyword(s):

Dft Calculations ◽

Sodium Hydride ◽

Hydrogen Atoms ◽

Subsequent Reaction ◽

Cluster Chemistry ◽

Cluster Shape ◽

Open Face

The deprotonation of S2B17H17 with sodium hydride and subsequent reaction with [PtCl2(PMe2Ph)2] gives the new macropolyhedral metallathiaborane [(PMe2Ph)2PtS2B16H16], of which the cluster consists of a conventional eleven-vertex nido {SB10} unit, fused, with two boron atoms in common, with a {PtSB8} unit of unique ten-vertex neo-arachno constitution and geometry. The latter geometry suggests a configuration for the previously structurally uncharacterised [B10H15]- anion; starting from this configuration, DFT calculations of structure and thence of boron nuclear shieldings, which are found very closely to mimic those found experimentally, thence support a fluxional structure for [B10H15]- with three {BHB(bridging)} and two {BH(endo)} hydrogen atoms around a six-membered open face.

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