scholarly journals Investigation of Molecular Bridging Using Atom Migration in Nanogap Electrodes

2021 ◽  
Vol 64 (9) ◽  
pp. 406-410
Author(s):  
Yasuhisa NAITOH ◽  
Touru SUMIYA ◽  
Guento MISAWA ◽  
Hisashi SHIMA ◽  
Hiroruki AKINAGA
Keyword(s):  
Atom Migration ◽  
Nanogap Electrodes

Electron Beam Damage of Biomolecules Assessed by Energy Loss Spectroscopy

1978 ◽  
Vol 36 (3) ◽  
pp. 61-69
Author(s):  
M. Isaacson ◽  
M.L. Collins ◽  
M. Listvan
Keyword(s):  
Electron Microscopy ◽  
Radiation Damage ◽  
Structural Integrity ◽  
Analytical Electron Microscopy ◽  
High Dose ◽  
Dose Rates ◽  
Special Cases ◽  
Analytical Electron ◽  
Atom Migration ◽  
Beam Damage

Over the past five years it has become evident that radiation damage provides the fundamental limit to the study of blomolecular structure by electron microscopy. In some special cases structural determinations at very low doses can be achieved through superposition techniques to study periodic (Unwin & Henderson, 1975) and nonperiodic (Saxton & Frank, 1977) specimens. In addition, protection methods such as glucose embedding (Unwin & Henderson, 1975) and maintenance of specimen hydration at low temperatures (Taylor & Glaeser, 1976) have also shown promise. Despite these successes, the basic nature of radiation damage in the electron microscope is far from clear. In general we cannot predict exactly how different structures will behave during electron Irradiation at high dose rates. Moreover, with the rapid rise of analytical electron microscopy over the last few years, nvicroscopists are becoming concerned with questions of compositional as well as structural integrity. It is important to measure changes in elemental composition arising from atom migration in or loss from the specimen as a result of electron bombardment.

scholarly journals Infrared Photoactivation Reduces Peptide Folding and Hydrogen-Atom Migration following ETD Tandem Mass Spectrometry

2009 ◽  
Vol 48 (45) ◽  
pp. 8526-8528 ◽  
Author(s):  
Aaron R. Ledvina ◽  
Graeme C. McAlister ◽  
Myles W. Gardner ◽  
Suncerae I. Smith ◽  
James A. Madsen ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Hydrogen Atom ◽  
Tandem Mass Spectrometry ◽  
Peptide Folding ◽  
Tandem Mass ◽  
Atom Migration

A synthesis and some reactions of 7-Oxabicyclo[2.2.1]heptan-2-one

1983 ◽  
Vol 36 (12) ◽  
pp. 2473 ◽  
Author(s):  
J Moursounidis ◽  
D Wege
Keyword(s):  
Thermal Decomposition ◽  
Alder Reaction ◽  
Diels Alder ◽  
Acid Mixture ◽  
Diels Alder Reaction ◽  
Reaction Proceeds ◽  
Atom Migration ◽  
Acyl Azide ◽  
Mild Hydrolysis ◽  
Hydrolysis Of

Diels-Alder reaction between furan and α-chloroacrylonitrile gives a mixture of exo-2-chloro-and endo-2-chloro-7-oxabicyclo[2.2.1]hept-5-ene-2-carbonitrile (4) and (5). Mild hydrolysis affords the corresponding α-chloro acid mixture, from which the endo carboxylic acid may be removed through iodo lactone formation. Catalytic hydrogenation of (4) and (5) followed by hydrolysis, acyl azide formation, Curtius rearrangement, and hydrolysis of the resulting mixture of a-chloro isocyanates yields 7-oxabicyclo[2.2.l]heptan-2-one (1) in preparatively useful amounts. Reduction of (1) gives only endo alcohol, and Baeyer-Villiger reaction proceeds with exclusive bridgehead atom migration. Thermal decomposition of the sodium salt of the p-toluenesulfonylhydrazone of (1) affords 7-oxatricyclo[2.2.1 .02,6]heptane.

scholarly journals Room-Temperature Gating of Molecular Junctions Using Few-Layer Graphene Nanogap Electrodes

Nano Letters ◽  
2011 ◽  
Vol 11 (11) ◽  
pp. 4607-4611 ◽  
Author(s):  
Ferry Prins ◽  
Amelia Barreiro ◽  
Justus W. Ruitenberg ◽  
Johannes S. Seldenthuis ◽  
Núria Aliaga-Alcalde ◽  
...  
Keyword(s):  
Room Temperature ◽  
Molecular Junctions ◽  
Layer Graphene ◽  
Nanogap Electrodes ◽  
Few Layer Graphene

Palladium-promoted sulfur atom migration on carboranes: facile B(4)−S bond formation from mononuclear Pd-B(4) complexes

2018 ◽  
Vol 90 (4) ◽  
pp. 607-616
Author(s):  
Yin-Ping Wang ◽  
Yue-Jian Lin ◽  
Guo-Xin Jin
Keyword(s):  
Sulfur Atom ◽  
Bond Formation ◽  
Reaction Process ◽  
One Pot ◽  
Leaving Group ◽  
Atom Migration ◽  
First Time

AbstractFor the first time, carborane complexes containing a B(4)–S bond were obtained directly by heating mononuclear Pd-B(4)-bound carborane complexes. A possible mechanism involved in sulfur atom migration is presented in which the leaving group, pyridine, benzyl isocyanide or PPh3, is demonstrated to be the trigger of the reaction process. In this work, efficient routes are developed through one-pot reactions to prepare B(4)-S carborane derivatives.

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