A 1H-NMR thermometer suitable for cryoprobes
A 1H-NMR thermometer suitable for cryoprobes
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DOI：
10.1002/mrc.1941
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发表时间：
2007-02-01
影响因子：
2
通讯作者：
Berger, S.
中科院分区：
文献类型：
--
作者：
Findeisen, M.;Brand, T.;Berger, S.
大多数现有的核磁共振温度计依赖于从纯溶液或浓缩溶液(例如乙二醇、甲醇)样品中测量的随温度变化的化学位移差。它们不适用于现代低温探头，因为探头的高Q值导致了强烈的辐射衰减。以全氢甲醇为例，建立了化学位移差与温度的关系，并用二次方程进行了很好的拟合。使用铂-100电阻验证了探头中样品管内的实际温度。版权所有(C)2006 John Wiley&Sons，Ltd.
Most established NMR thermometers rely on temperature-dependent chemical shift differences measured from samples that are either neat or concentrated solutions (e.g. ethylene glycol, methanol). These are unsuitable for modern cryoprobes on account of strong radiation damping resulting from the high Q of the probe. Using perdeuterated methanol, we established a relationship between the chemical shift difference and temperature, and we show that this relationship is well fitted by a quadratic equation. The actual temperature within a sample tube in the probe was verified using a Pt-100 resistor. Copyright (c) 2006 John Wiley & Sons, Ltd.