In this experiment students use diffusion-ordered NMR spectroscopy (DOSY) to determine the viscosity of a solution by measuring the diffusion coefficient (D) for a reference compound in solvents of known viscosity (η), generating a linear calibration curve of log(D) vs log(η). Measuring the reference compound’s diffusion coefficient allows an determination of its viscosity.
The full citation is here: Li, W., Kagan, G., Hopson, R., Williard, P. G. J. Chem. Educ. 2011, 88, 1331–1335 and a link to the article is provided below (subscription to the journal required).