Effects of molecular gases on Xe electroluminescence and electron resonance trapping

1984 ◽  
Vol 3 (6) ◽  
pp. 963-980 ◽  
Author(s):  
G. M. de' Munari ◽  
L. Gabba ◽  
F. Giusiano ◽  
G. Mambriani
Keyword(s):  
Electron Resonance ◽  
Molecular Gases ◽  
Resonance Trapping

Electron resonance-trapping in rare gases in an electric field and transport properties

1970 ◽  
Vol 3 (26) ◽  
pp. 849-855 ◽  
Author(s):  
G. M. de’ Munari ◽  
G. Mambriani ◽  
F. Giusiano
Keyword(s):  
Electric Field ◽  
Transport Properties ◽  
Rare Gases ◽  
Electron Resonance ◽  
Resonance Trapping

Temperature effects in Xe electroluminescence and electron resonance trapping

1977 ◽  
Vol 20 (10) ◽  
pp. 351-360 ◽  
Author(s):  
G. M. de’ Munari ◽  
L. Gabba ◽  
F. Giusiano ◽  
G. Mambriani
Keyword(s):  
Temperature Effects ◽  
Electron Resonance ◽  
Resonance Trapping

Direct Observation of Chain Lengths and Conformations in Oligofluorene Distributions from Controlled Polymerization by Double Electron-Electron Resonance

2019 ◽  
Author(s):  
Dennis Bücker ◽  
Annika Sickinger ◽  
Julian D. Ruiz Perez ◽  
Manuel Oestringer ◽  
Stefan Mecking ◽  
...  
Keyword(s):  
Chain Length ◽  
Length Distribution ◽  
Catalyst System ◽  
Chain Conformation ◽  
Controlled Polymerization ◽  
Chain Length Distribution ◽  
Electron Resonance ◽  
Double Electron ◽  
The Individual ◽  
Double Electron Electron Resonance

Synthetic polymers are mixtures of different length chains, and their chain length and chain conformation is often experimentally characterized by ensemble averages. We demonstrate that Double-Electron-Electron-Resonance (DEER) spectroscopy can reveal the chain length distribution, and chain conformation and flexibility of the individual n-mers in oligo-(9,9-dioctylfluorene) from controlled Suzuki-Miyaura Coupling Polymerization (cSMCP). The required spin-labeled chain ends were introduced efficiently via a TEMPO-substituted initiator and chain terminating agent, respectively, with an in situ catalyst system. Individual precise chain length oligomers as reference materials were obtained by a stepwise approach. Chain length distribution, chain conformation and flexibility can also be accessed within poly(fluorene) nanoparticles.

In-Cell Double Electron–Electron Resonance at Nanomolar Protein Concentrations

2021 ◽  
pp. 3679-3684
Author(s):  
Svetlana Kucher ◽  
Christina Elsner ◽  
Mariya Safonova ◽  
Stefano Maffini ◽  
Enrica Bordignon
Keyword(s):  
Electron Resonance ◽  
Double Electron ◽  
Double Electron Electron Resonance

Modular Device for the Formation and Study of Cluster Beams of Inert and Molecular Gases

2019 ◽  
Vol 13 (5) ◽  
pp. 862-869
Author(s):  
A. N. Nechay ◽  
A. A. Perekalov ◽  
N. I. Chkhalo ◽  
N. N. Salashchenko ◽  
I. G. Zabrodin ◽  
...  
Keyword(s):  
Molecular Gases ◽  
Cluster Beams

Line broadening in the electron resonance spectra of spin probes dissolved in anisotropic media: the effect of nuclear spin quantization

1977 ◽  
Vol 353 (1672) ◽  
pp. 87-102 ◽  
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Nuclear Spin ◽  
Dynamic Properties ◽  
Orientational Order ◽  
Anisotropic Media ◽  
Approximate Theory ◽  
Spin Probes ◽  
Line Broadening ◽  
Electron Resonance

The line broadening in the electron resonance spectra of monoradicals dissolved in anisotropic media, such as liquid crystals, provides a valuable probe of both the orientational order and the molecular dynamics. However, the fast-motion relaxation theory employed to extract this information from the linewidths assumes that the nuclear spin is quantized along the direction of the magnetic field. This approximation is only correct when the symmetry axis of a uniaxial liquid crystal is either parallel or perpendicular to the field. We have therefore removed this assumption and have developed a general theory of line broadening valid for all orientations of the liquid crystal. The theory is then used to evaluate the angular dependence of the linewidths and this is compared with the dependence predicted by the approximate theory, for two classes of nitroxide spin probes. These comparisons reveal that for steroidal spin probes the error, introduced by assuming the nuclear spin to be quantized along the field, is confined to the dynamic properties derived from the linewidths. In contrast, significant errors appear in both the dynamic and static properties obtained from an analysis of the linewidth variations for fatty acid spin probes based on the approximate theory. It would seem that the exact theory must be employed to obtain precise information from linewidth investigations of liquid crystals, except when the orientational order is extremely small.

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