Reactions of aromatic nitrile N-oxides with organic radicals. New type of spin-trapping reagent

1971 ◽  
Vol 93 (13) ◽  
pp. 3290-3291 ◽  
Author(s):  
B. C. Gilbert ◽  
V. Malatesta ◽  
R. O. C. Norman
Keyword(s):  
Spin Trapping ◽  
Organic Radicals ◽  
New Type ◽  
Aromatic Nitrile

scholarly journals Polyphosphorhydrazone-Based Radical Dendrimers

Molecules ◽  
2021 ◽  
Vol 26 (5) ◽  
pp. 1230
Author(s):  
Vega Lloveras ◽  
José Vidal-Gancedo
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Contrast Agents ◽  
Biomedical Applications ◽  
Organic Radicals ◽  
Resonance Imaging ◽  
Metal Free ◽  
Antioxidant Agents ◽  
New Type ◽  
Paramagnetic Properties

The search for new biomedical applications of dendrimers has promoted the synthesis of new radical-based molecules. Specifically, obtaining radical dendrimers has opened the door to their use in various fields such as magnetic resonance imaging, as anti-tumor or antioxidant agents, or the possibility of developing new types of devices based on the paramagnetic properties of organic radicals. Herein, we present a mini review of radical dendrimers based on polyphosphorhydrazone, a new type of macromolecule with which, thanks to their versatility, new metal-free contrast agents are being obtained, among other possible applications.

Spin trapping study on addition reaction of organic radicals to methyl methacrylate and methyl tiglate

1981 ◽  
Vol 6 (3-4) ◽  
pp. 143-146 ◽  
Author(s):  
Mikiharu Kamachi ◽  
Yoko Kuwae ◽  
Shun -ichi Nozakura
Keyword(s):  
Methyl Methacrylate ◽  
Addition Reaction ◽  
Spin Trapping ◽  
Organic Radicals

Über Reaktionen organischer Radikale mit Palladium- und Platinkomplexen / Reactions of Organic Radicals with Palladium and Platinum Complexes

1971 ◽  
Vol 26 (7) ◽  
pp. 684-689 ◽  
Author(s):  
W. Beck ◽  
K. Schorpp ◽  
K. H. Stetter
Keyword(s):  
Platinum Complexes ◽  
Organic Radicals ◽  
Epr Spectra ◽  
New Type ◽  
Palladium And Platinum Complexes

Preparation, IR- and EPR-spectra of paramagnetic dichloro-porphyrexid-palladium(II) from porphyrexid and sodium-tetrachloropalladate are reported.The reaction of organic radicals with tetrakis (triphenylphosphine) platinum (O) provides a new type of oxydative addition. Treatment of Pt (PPh3)4 with 1,2-diphenyl-2-picrylhydrazyl yielded diphenylamido-2,4,6-trinitrophenyl-bis (triphenylphosphine) platinum (II). Dibenzoylperoxide yielded cis-dibenzoato-bis (triphenylphosphine) platinum (II), whereas with diaryl- and dialkylnitrogenoxide and tetraarylhydrazine no reaction was observed.

Spin Trapping Organic Radicals

1994 ◽  
Vol 66 (7) ◽  
pp. 419A-427A ◽  
Author(s):  
Daniel F. Church
Keyword(s):  
Spin Trapping ◽  
Organic Radicals

Spin Trapping Organic Radicals

1994 ◽  
Vol 66 (7) ◽  
pp. 418A-427A ◽  
Author(s):  
Daniel F. Church
Keyword(s):  
Spin Trapping ◽  
Organic Radicals

The Microstructure of Shock-Synthesized Diamond

1967 ◽  
Vol 25 ◽  
pp. 324-325
Author(s):  
Lucien F. Trueb
Keyword(s):  
Single Crystals ◽  
Preferred Orientation ◽  
High Magnification ◽  
Texture Pattern ◽  
Shock Process ◽  
New Type ◽  
Diffraction Diagram

A new type of synthetic industrial diamond formed by an explosive shock process has been recently developed by the Du Pont Company. This material consists of a mixture of two basically different forms, as shown in Figure 1: relatively flat and compact aggregates of acicular crystallites, and single crystals in the form of irregular polyhedra with straight edges.Figure 2 is a high magnification micrograph typical for the fibrous aggregates; it shows that they are composed of bundles of crystallites 0.05-0.3 μ long and 0.02 μ. wide. The selected area diffraction diagram (insert in Figure 2) consists of a weak polycrystalline ring pattern and a strong texture pattern with arc reflections. The latter results from crystals having preferred orientation, which shows that in a given particle most fibrils have a similar orientation.

New type electron gun with electrostatic and electromagnetic lenses

1978 ◽  
Vol 36 (1) ◽  
pp. 62-63
Author(s):  
T. Ichinokawa ◽  
H. Maeda
Keyword(s):  
Electron Microscopy ◽  
Electron Beam ◽  
Optimum Condition ◽  
Bias Voltage ◽  
Electron Gun ◽  
Charge Effect ◽  
Micro Fabrication ◽  
Maximum Brightness ◽  
New Type ◽  
The Ideal

I. IntroductionThermionic electron gun with the Wehnelt grid is popularly used in the electron microscopy and electron beam micro-fabrication. It is well known that this gun could get the ideal brightness caluculated from the Lengumier and Richardson equations under the optimum condition. However, the design and ajustment to the optimum condition is not so easy. The gun has following properties with respect to the Wehnelt bias; (1) The maximum brightness is got only in the optimum bias. (2) In the larger bias than the optimum, the brightness decreases with increasing the bias voltage on account of the space charge effect. (3) In the smaller bias than the optimum, the brightness decreases with bias voltage on account of spreading of the cross over spot due to the aberrations of the electrostatic immersion lens.In the present experiment, a new type electron gun with the electrostatic and electromagnetic lens is designed, and its properties are examined experimentally.

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