Magnetic coupling high resolution nuclear magnetic resolution probe and method of use
AssigneeJEOL Ltd.
InventorAlbert Zens
Life of this patent
Estimating the term…
Abstract
In an embodiment of the invention inductive coupling of an idler coil to a parent coil is used to provide a double resonance circuit without the disadvantages of capacitive coupling to the parent coil. In an embodiment of the invention, an inductive coupling coil can be used to achieve a double-tuned circuit. In an embodiment of the invention, a circuit uses inductive coupling to achieve a double resonance circuit for 1H, 19F, and 13C experiments where one of the three nuclei are observed and the other two are decoupled. In an embodiment of the invention a pivot or a shunt can be used to couple and decouple the idler coil and the parent coil.
Claims20
A method to simultaneously obtain a Nuclear Magnetic Resonance (NMR) spectrum of two or more nuclei from a sample, comprising:
- (a) introducing one or more of a homogeneous or heterogeneous liquid, gas or solid sample into a NMR probe comprising:
- (i) a parent coil circuit including a parent coil within the NMR probe;
- (ii) one or more elements selected from the group consisting of a pivot, a shunt and a screen;
- and
- (iii) an idler coil circuit including an idler coil;
- (b) introducing the NMR probe into a magnetic field;
- (c) exciting the sample with a Radio Frequency (RF) pulse at a Larmor frequency;
- (d) physically moving the idler coil and/or the screen using the pivot and/or the shunt to inductively couple or decouple the idler coil from the parent coil;
- (e) splitting of a resonance of the parent coil circuit into a first mode and a second mode, where moving the idler coil in step (d) adjusts the coupling constant from zero to a non zero value to split the resonance into the first mode and the second mode;
- and
- (f) detecting the NMR spectrum including the first mode and the second mode.
A probe comprising:
- (a) a high resolution Nuclear Magnetic Resonance (NMR) probe containing one or more of a homogeneous or heterogeneous liquid, gas or solid sample;
- (b) a parent coil circuit including a parent coil and an inductor L2;
- (c) one or more elements selected from the group consisting of a pivot, a shunt and a metallic screen;
- and
- (d) an idler coil circuit including an idler coil and an inductor L1 adapted to allow splitting of a resonance of the parent coil circuit into a first mode and a second mode, where the pivot and/or the shunt are adapted to physically move the idler coil and/or the metallic screen to one or both inductively couple and decouple the idler coil from the parent coil where the coupling constant (k) between the parent coil and idler coil is given by k=M/√(L1L2), where M is the mutual inductance between L1 and L2, where physically moving the idler coil and/or the metallic screen adjusts the coupling constant from zero to a non zero value to split the resonance into the first mode and the second mode.
A method comprising:
- (a) introducing a sample in an NMR probe into a magnetic field, the NMR probe comprising:
- (i) a parent coil circuit including a parent coil and an inductor L2;
- (ii) one or more elements selected from the group consisting of a pivot, a shunt and a metallic screen;
- and
- (iii) an idler coil circuit including an idler coil and an inductor L1;
- (b) exciting the sample with a Radio Frequency (RF) pulse at a Larmor frequency to generate a resonance;
- (c) physically moving the idler coil and/or the metallic screen-using the pivot and/or the shunt to inductively couple and/or decouple the idler coil from the parent coil to allow splitting of the resonance of the parent coil, where the coupling constant (k) between the parent coil and idler coil is given by k=M/√(L1L2), where M is the mutual inductance between L1 and L2, where physically moving the idler coil and/or the metallic screen adjusts the coupling constant from zero to a non zero value to split the resonance;
- and
- (d) inductive coupling splitting the resonance of the parent coil circuit into a first mode and a second mode.
Dependencies are inferred from the claim text.