Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Patent
1998-03-18
2000-04-25
Oda, Christine K.
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
G01V 300
Patent
active
060548576
ABSTRACT:
A cylindrical NMR sample cell is made from a first plastic material having Young's modulus Y.sub.1, tensile strength S.sub.1, and density p.sub.1 with precision outside diameter (OD) d.sub.4, wherein the outside diameter fits inside a ceramic NMR MAS rotor having modulus Y.sub.3 and density p.sub.3. The sample cell comprising a sample chamber with a concentric cylindrical opening at one end having inside diameter d.sub.2. A cylindrical plug is made from a second plastic material having modulus Y.sub.2, strength S.sub.2, and density p.sub.2 with plug outside diameter d.sub.1 to fit firmly inside the mouth of the cell, so as to seal the sample of density p.sub.4 inside the cell with inside cell diameter d.sub.3 when stationary and to seal when spinning at a high rate of speed inside the ceramic rotor. More-over, the following materials properties and relationships are satisfied: Y.sub.1> 0.8 GPa, Y.sub.1 <4 GPa, Y.sub.2 <3.4 GPa, S.sub.1 >8 MPa, S.sub.2 >3 MPa, p.sub.2 >880 kg/m.sup.3, p.sub.2 >p.sub.4, Y.sub.3 >Y.sub.2 >Y.sub.1, and p.sub.2 /Y.sub.2 >p.sub.1 /Y.sub.1. A dual-chamber cell is also disclosed to facilitate external lock.
REFERENCES:
patent: 4254373 (1981-03-01), Lippmaa
patent: 4456882 (1984-06-01), Doty
patent: 4511841 (1985-04-01), Bartuska
patent: 4654592 (1987-03-01), Zens
patent: 4739270 (1988-04-01), Daugaard
patent: 4940942 (1990-07-01), Bartuska
patent: 5202633 (1993-04-01), Doty
patent: 5325059 (1994-06-01), Doty
patent: 5333994 (1994-08-01), Doty et al.
patent: 5508615 (1996-04-01), Doty
T.M. Barbara, "Cylindrical Demagnetization Fields and Microprobe Design in High-Resolution NMR," J. Magn. Reson. Ser. A, 109, pp. 265-269, 1994.
A. Bielecki and D.P. Burum, "Temperature Dependence of .sup.207 Pb MAS for VT MAS Spectra of Solid Lead Nitrate. An Accurate, Sensitive Thermometer for VT MAS," J. Magn. Reson. Ser. A, vol. 116, pp. 215-220, 1995.
F.D. Doty, "Solid State NMR Probe Design," Encyclopedia of NMR, vol. 7, Wiley Press, 1996.
P.A. Keifer, L. Baltusis, D.M. Rice, A.A. Tymiak, and J. N. Shoolery, "A Comparison of NMR Spectra Obtained for Solid-Phase-Synthesis Resins Using Conventional High-Resolution, MAS, and HR-MAS Probes," J. Magn. Reson. Ser. A, vol. 119, pp. 65-75, 1996.
P.A. Keifer, "Influence of Resin Structure, Tether Length, and Solvent Upon the High Resolution .sup.1 H NMR Spectra of Solid-Phase-Synthesis Resins," in J. Org. Chem., vol. 61, pp. 1558-1559, 1996.
Doty Scientific Inc.
Fetzner Tiffany A.
Oda Christine K.
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