The Chemistry of Formazan Dyes. Synthesis and Characterization of a Stable Verdazyl Radical and a Related Boron-Containing Heterocycle

2009 ◽  
Vol 86 (1) ◽  
pp. 76 ◽  
Author(s):  
David E. Berry ◽  
Robin G. Hicks ◽  
Joe B. Gilroy
Keyword(s):  
Synthesis And Characterization ◽  
Verdazyl Radical

Synthesis and characterization of a TTF-π-verdazyl radical—a new building block for conducting and/or magnetic systems

2007 ◽  
Vol 31 (11) ◽  
pp. 1973 ◽  
Author(s):  
M’hamed Chahma ◽  
Keely Macnamara ◽  
Art van der Est ◽  
Antonio Alberola ◽  
Victor Polo ◽  
...  
Keyword(s):  
Building Block ◽  
Synthesis And Characterization ◽  
Magnetic Systems ◽  
Verdazyl Radical

Synthesis and characterization of a spirocyclic phosphaverdazyl radical - cyclophosphazene hybrid: Evidence for spin transfer from a verdazyl radical to a phosphazene ring

2002 ◽  
Vol 80 (11) ◽  
pp. 1501-1506 ◽  
Author(s):  
Tosha M Barclay ◽  
Robin G Hicks ◽  
Andrew S Ichimura ◽  
Greg W Patenaude
Keyword(s):  
Hyperfine Coupling ◽  
Spin Transfer ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
Spectroscopy Analysis ◽  
X Ray ◽  
Verdazyl Radical ◽  
Endor Spectroscopy ◽  
Stable Radicals

The synthesis and characterization of a new 6-phosphaverdazyl radical incorporated into a spirocyclic framework containing a cyclotriphosphazene ring is described. Reaction of 1,1,3,3-bis[spiro-2',2''-dioxy-1',1''-biphenyl]-5,5-bis(1-methylhydrazido)-1,3,5,2,4,6-cyclotriphosphazene (7) with trimethylorthobenzoate yielded 6-[2,2,4,4-bis(2,2'-dioxy-1,1'-biphenyl)-2,4,6,1,3,5-cyclotriphosphazen-6-yl]-1,2,5,6-tetrahydro-1,5-dimethyl-3-phenyl-1,2,4,5,6-tetrazaphosphorine (8), which was characterized spectroscopically and by X-ray diffraction. Oxidation of 8 yielded 6-[2,2,4,4-bis(2,2'-dioxy-1,1'-biphenyl)-2,4,6,1,3,5-cyclotriphosphazen-6-yl]-1,5-dimethyl-3-phenyl-6-phosphaverdazyl (5), which was characterized by EPR and ENDOR spectroscopy. Analysis of both spectra indicate that spin density from the phosphaverdazyl ring induces spin polarization into the phosphazene ring, as evidenced by hyperfine coupling to all three phosphorus nuclei.Key words: heterocycle, phosphorus–nitrogen compounds, phosphazenes, stable radicals, verdazyls.

Synthesis and Characterization of the Three Dicyclopentapyrenes

1996 ◽  
Vol 61 (10) ◽  
pp. 3572-3572
Author(s):  
Lawrence T. Scott ◽  
Atena Necula
Keyword(s):  
Synthesis And Characterization

Synthesis and characterization of TiN / Ti / AISI 410 coatings

2018 ◽  
Vol 2 (1) ◽  
pp. 7
Author(s):  
S Chirino ◽  
Jaime Diaz ◽  
N Monteblanco ◽  
E Valderrama
Keyword(s):  
Synthesis And Characterization ◽  
Photoemission Spectroscopy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Columnar Grains ◽  
Tin Thin Films ◽  
Steel Aisi ◽  
Interacting Surfaces ◽  
Stainless Steel Aisi

The synthesis and characterization of Ti and TiN thin films of different thicknesses was carried out on a martensitic stainless steel AISI 410 substrate used for tool manufacturing. The mechanical parameters between the interacting surfaces such as thickness, adhesion and hardness were measured. By means of the scanning electron microscope (SEM) the superficial morphology of the Ti/TiN interface was observed, finding that the growth was of columnar grains and by means of EDAX the existence of titanium was verified.  Using X-ray diffraction (XRD) it was possible to observe the presence of residual stresses (~ -3.1 GPa) due to the different crystalline phases in the coating. Under X-ray photoemission spectroscopy (XPS) it was possible to observe the molecular chemical composition of the coating surface, being Ti-N, Ti-N-O and Ti-O the predominant ones.

Synthesis and characterization of zeolite-encapsulated porphyrins

2009 ◽  
Author(s):  
Marziye Javaheri Kachousangi ◽  
Rahmatollah Rahimi ◽  
Mohamad Mehdi Kashani-Motlagh
Keyword(s):  
Synthesis And Characterization
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