Insertion of Phosphenium Ions into a Bicyclo[1.1.0]Tetraphosphabutane Iron Complex

By reacting [{Cp‴Fe(CO)2}2(µ,η1:1-P4)] (1) with in situ generated phosphenium ions [Ph2P][A] ([A]− = [OTf]− = [O3SCF3]−, [PF6]−), a mixture of two main products of the composition [{Cp‴Fe(CO)2}2(µ,η1:1-P5(C6H5)2)][PF6] (2a and 3a) could be identified by extensive 31P NMR spectroscopic studies at 193 K. Compound 3a was also characterized by X-ray diffraction analysis, showing the rarely observed bicyclo[2.1.0]pentaphosphapentane unit. At room temperature, the novel compound [{Cp‴Fe}(µ,η4:1-P5Ph2){Cp‴(CO)2Fe}][PF6] (4) is formed by decarbonylation. Reacting 1 with in situ generated diphenyl arsenium ions gives short-lived intermediates at 193 K which disproportionate at room temperature into tetraphenyldiarsine and [{Cp‴Fe(CO)2}4(µ4,η1:1:1:1-P8)][OTf]2 (5) containing a tetracyclo[3.3.0.02,7.03,6]octaphosphaoctane ligand.

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Ten-Vertex Polyhedral Monocarbaborane Chemistry. The Novel High-Yield Formation of the Ten-Vertex closo Compound [6-(PMe2Ph)-closo-1-CB9H9] from the Thermolysis of [8,8-(PMe2Ph)2-nido-8,7-PtCB9H11]

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19932924 ◽

1993 ◽

Vol 58 (12) ◽

pp. 2924-2935 ◽

Cited By ~ 8

Author(s):

Jane H. Jones ◽

Bohumil Štíbr ◽

John D. Kennedy ◽

Mark Thornton-Pett

Keyword(s):

Nmr Spectroscopy ◽

Diffraction Analysis ◽

High Yield ◽

Monoclinic Space Group ◽

The Novel ◽

X Ray Diffraction ◽

Metal Centre ◽

X Ray ◽

Yield Formation ◽

Boiling Toluene

Thermolysis of [8,8-(PMe2Ph)2-nido-8,7-PtCB9H11] in boiling toluene solution results in an elimination of the platinum centre and cluster closure to give the ten-vertex closo species [6-(PMe2Ph)-closo-1-CB9H9] in 85% yield as a colourles air stable solid. The product is characterized by NMR spectroscopy and single-crystal X-ray diffraction analysis. Crystals (from hexane-dichloromethane) are monoclinic, space group P21/c, with a = 903.20(9), b = 1 481.86(11), c = 2 320.0(2) pm, β = 97.860(7)° and Z = 8, and the structure has been refined to R(Rw) = 0.045(0.051) for 3 281 observed reflections with Fo > 2.0σ(Fo). The clean high-yield elimination of a metal centre from a polyhedral metallaborane or metallaheteroborane species is very rare.

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Photoluminescence Enhancement of CdS Nanocrystals Fabricated on Dithiocarbamate Functionalized PET Substrates

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.512-515.1511 ◽

2012 ◽

Vol 512-515 ◽

pp. 1511-1515

Author(s):

Chun Lin Zhao ◽

Li Xing ◽

Xiao Hong Liang ◽

Jun Hui Xiang ◽

Fu Shi Zhang ◽

...

Keyword(s):

Room Temperature ◽

Hexagonal Structure ◽

Diffraction Measurement ◽

X Ray Diffraction ◽

Visible Absorption ◽

X Ray ◽

Cds Nanocrystals ◽

Morphological Studies ◽

Transmission Electron

Cadmium sulfide (CdS) nanocrystals (NCs) were self-assembled and in-situ immobilized on the dithiocarbamate (DTCs)-functionalized polyethylene glycol terephthalate (PET) substrates between the organic (carbon disulfide diffused in n-hexane) –aqueous (ethylenediamine and Cd2+ dissolved in water) interface at room temperature. Powder X-ray diffraction measurement revealed the hexagonal structure of CdS nanocrystals. Morphological studies performed by scanning electron microscopy (SEM) and high-resolution transmission electron microscope (HRTEM) showed the island-like structure of CdS nanocrystals on PET substrates, as well as energy-dispersive X-ray spectroscopy (EDS) confirmed the stoichiometries of CdS nanocrystals. The optical properties of DTCs modified CdS nanocrystals were thoroughly investigated by ultraviolet-visible absorption spectroscopy (UV-vis) and fluorescence spectroscopy. The as-prepared DTCs present intrinsic hydrophobicity and strong affinity for CdS nanocrystals.

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In Situ Synchrotron X-Ray Diffraction Study of a Deformed Cu-Fe-P Alloy during Heating

Materials Science Forum ◽

10.4028/www.scientific.net/msf.850.191 ◽

2016 ◽

Vol 850 ◽

pp. 191-196 ◽

Cited By ~ 1

Author(s):

Wei Wang ◽

Cun Lei Zou ◽

Ren Geng Li ◽

Wen Wen ◽

Hui Jun Kang ◽

...

Keyword(s):

Room Temperature ◽

Lattice Distortion ◽

Copper Matrix ◽

Heating Process ◽

Recrystallization Process ◽

Full Width ◽

X Ray Diffraction ◽

Dramatic Decrease ◽

X Ray

In situ synchrotron X-ray diffraction was used to study a deformed Cu-0.88 Fe-0.24 P alloy during heating process. The measurements were performed at room temperature and also at high temperatures up to 893 K in order to determine the recovery, ageing and recrystallization process. With the increase of temperature, the angles of copper matrix peaks moved left and the FWHM (full width at half maximum) decreased slightly. Fe3P precipitates were first detected at 533 K, reached the maximum at 673 K, and re-dissolved into matrix at 853 K. A dramatic decrease in FWHM was observed accompanied by the precipitation of Fe3P phases, indicating the reduction of lattice distortion of copper matrix.

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In Situ Synchrotron X-Ray Diffraction Analysis of Phase Transformation in Epitaxial Metastable hcp Nickel Thin Films, Prepared via Plasma-Enhanced Atomic Layer Deposition

Advanced Materials Interfaces ◽

10.1002/admi.201800957 ◽

2018 ◽

Vol 5 (24) ◽

pp. 1800957 ◽

Cited By ~ 1

Author(s):

Pouyan Motamedi ◽

Ken Bosnick ◽

Ken Cadien ◽

James D. Hogan

Keyword(s):

Thin Films ◽

Phase Transformation ◽

Atomic Layer Deposition ◽

Diffraction Analysis ◽

Atomic Layer ◽

X Ray Diffraction ◽

X Ray ◽

Nickel Thin Films ◽

Layer Deposition

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Determination of the easy magnetisation direction by x-ray diffraction analysis at room temperature in the R3(Fe, M)29 compounds: R = Pr, Nd, Sm, Gd, Tb, Dy and Y; M = Ti and V

Solid State Communications ◽

10.1016/0038-1098(95)00838-1 ◽

1996 ◽

Vol 98 (6) ◽

pp. 565-570 ◽

Cited By ~ 47

Author(s):

D. Courtois ◽

Hong-Shuo Li ◽

J.M. Cadogan

Keyword(s):

Diffraction Analysis ◽

Room Temperature ◽

X Ray Diffraction ◽

X Ray

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Synthesis and Luminescence Properties of Chalcopyrite-Type CuAlS2

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.301.177 ◽

2006 ◽

Vol 301 ◽

pp. 177-180 ◽

Cited By ~ 3

Author(s):

Yuichiro Kuroki ◽

Tomoichiro Okamoto ◽

Masasuke Takata

Keyword(s):

Diffraction Analysis ◽

Room Temperature ◽

Single Phase ◽

Elevated Temperatures ◽

Emission Peak ◽

Maximum Intensity ◽

X Ray Diffraction ◽

Ultraviolet Emission ◽

X Ray ◽

Copper Aluminum

Copper aluminum disulfide (CuAlS2) powders were synthesized in an evacuated ampoule at elevated temperatures. X-ray diffraction analysis revealed that the powders heated at temperatures higher than 800oC were single-phase CuAlS2. In the cathodoluminescence (CL) spectra measured at room temperature, the powders heated at temperatures higher than 600oC exhibited a visible emission peak at approximately 1.8 eV and a distinct ultraviolet emission peak at 3.45 eV. The powder heated at 700oC showed the maximum intensity of ultraviolet emission which is considered to be associated with excitons.

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Megastachine, a new alkaloid from Lycopodiummegastachyum

Canadian Journal of Chemistry ◽

10.1139/v79-271 ◽

1979 ◽

Vol 57 (13) ◽

pp. 1691-1693 ◽

Cited By ~ 8

Author(s):

Jean-Claude Braekman ◽

Claude Hootele ◽

Noah Miller ◽

Jean-Paul Declercq ◽

Gabriel Germain ◽

...

Keyword(s):

Diffraction Analysis ◽

The Novel ◽

X Ray Diffraction ◽

X Ray ◽

Lycopodium Alkaloid ◽

New Type

The isolation of the novel pentacyclic base megastachine (1), representative of a new type of Lycopodium alkaloid, is reported. Its structure has been determined by X-ray diffraction analysis.

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