Aqueous sample holders for high-frequency electron spin resonance

Barnes, Jeff P.; Freed, Jack H.
July 1997
Review of Scientific Instruments;Jul97, Vol. 68 Issue 7, p2838
Academic Journal
Describes the use of a quasioptical approach to design a resonator and sample holder for aqueous samples for high-frequency electron spin resonance spectroscopy. Selection of a disk-shaped sample geometry to match the field contours of the fundamental mode in a Fabry-Perot resonator; Use of a transmission line analysis; Diffractive effects of the samples.


Related Articles

  • Bimodal loop-gap resonator. Piasecki, W.; Froncisz, W.; Hyde, James S. // Review of Scientific Instruments;May96, Vol. 67 Issue 5, p1896 

    Describes a bimodal loop-gap resonator for use in electron paramagnetic resonance spectroscopy at S band. Bimodal resonator background; Resonator design; Construction details; Network analysis; Magnetic resonance experiments.

  • Broadband (up to 10 GHz) electron-paramagnetic-resonance spectrometer: cw implementation with direct detection. Rubinson, Kenneth A. // Review of Scientific Instruments;Mar89, Vol. 60 Issue 3, p392 

    The design principles for a broadband (up to 10 GHz) electron-paramagnetic-resonance (EPR) spectrometer are presented. The upper frequency limit is determined by the losses in the coaxial cables. The sample is inserted along the central conductor at the end of a short-circuited coaxial line that...

  • EPR study of iron-doped MFI zeolite and silicalite catalysts: effect of treatments after synthesis. Ferretti, Anna M.; Forni, Lucio; Oliva, Cesare; Ponti, Alessandro // Research on Chemical Intermediates;2002, Vol. 28 Issue 2/3, p101 

    The systematic study of iron-doped MFI zeolite and MFI silicalite by X- and Q-band EPR spectroscopy is reported in this paper. Both samples, which contain Fe(III) ions in the MFI lattice, underwent three sequential treatments�calcination, steaming, and washing with sodium dithionite...

  • Inversion of Spin Levels in Ni[sup 2+] : Zn(BF[sub 4])[sub 2] · 6H[sub 2]O under Uniform Compression and the Effect of Transition Coincidence. Krygin, I. M.; Prokhorov, A. A.; Neılo, G. N.; Prokhorov, A. D. // Physics of the Solid State;Dec2001, Vol. 43 Issue 12, p2242 

    The electron paramagnetic resonance (EPR) spectra of Ni[sup 2+] ions substituting for Zn[sup 2+] ions in Zn(BF[sub 4])[sub 2] · 6H[sub 2]O crystals are studied over a wide range of temperatures under uniform compression. Measurements are performed in the X- and Q-bands. The parameter D, which...

  • An improved inductive coupler for suppressing a shift in the resonance frequency of electron... Hirata, Hiroshi; Walczak, Tadeusz; Swartz, Harold M. // Review of Scientific Instruments;Aug1997, Vol. 68 Issue 8, p3187 

    Describes a method for the development of in vivo electron paramagnetic resonance spectrometers and the inductive coupling between a microwave resonator and a transmission line. Configuration and equivalent circuit of the matching system; Optimum line length for minimum frequency deviation;...

  • Far-infrared electron-paramagnetic-resonance spectrometer utilizing a quasioptical reflection... Earle, Keith A.; Tipikin, Dmitriy S.; Freed, Jack H. // Review of Scientific Instruments;Jul96, Vol. 67 Issue 7, p2502 

    Describes a far-infrared electron-paramagnetic-resonance (EPR) spectrometer for broadband use. Operation of the spectrometer in the reflection mode; Use of broadband quasioptical methods; Advantages of the reflection bridge for performing EPR experiments; Design for variable coupling of the...

  • 1-mm wave ESR spectrometer. Lynch, W. Bryan; Earle, Keith A.; Freed, Jack H. // Review of Scientific Instruments;Aug1988, Vol. 59 Issue 8, p1345 

    An ESR spectrometer operating at 250-GHz frequency (1.22-mm wavelength) and 9-T magnetic field is described. The utilization of far-infrared (FIR) technology greatly simplifies its design and performance. Good frequency and field stability are achieved by unique designee which also conveniently...

  • A high magnetic field EPR spectrometer. Muller, F.; Hopkins, M. A.; Coron, N.; Grynberg, M.; Brunel, L. C.; Martinez, G. // Review of Scientific Instruments;Dec1989, Vol. 60 Issue 12, p3681 

    We describe a tunable electron paramagnetic resonance (EPR) spectrometer designed to operate at frequencies between 160 and 525 GHz and magnetic fields of up to 20 T. To operate in such a broad frequency range we use a very stable optically pumped far infrared laser. The performance of the...

  • Reexamination of the location of VO2+ in ZnSO4·7H2O by EPR and ZFR. Bramley, Richard; Strach, Steven J. // Journal of Chemical Physics;3/1/1985, Vol. 82 Issue 5, p2437 

    The single crystal EPR spectra of VO2+ doped ZnSO4·7H2O have been reexamined. The angular behavior confirms the orthorhombic structure and the ion is found to replace zinc–water units. Accurate values of the hyperfine principal values were determined by zero-field EPR (ZFR). One...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics