W. Sikorski, A. Sanders, H. Reich
Jun 1, 1998
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Journal
Magnetic Resonance in Chemistry
Abstract
Tris(trimethylsilyl)methane has excellent properties for an internal chemical shift thermometer to measure temperatures in 13C DNMR spectroscopy [Δδ between the 13C signals of Si(CH3)3 and CH carbons]. It is chemically inert, soluble in most organic solvents and has an almost linear dependence of Δδ on temperature. The sensitivity (approximately 1°C Hz‐1 at 90 MHz) allows the measurement of temperature to within 1°C. The chemical shift is solvent dependent, so each solvent mixture must be calibrated. Calibrations are presented for seven solvents. © 1998 John Wiley & Sons, Ltd.