Hyperpolarization Update #7 (Well, that worked)

This is the first clear hyperpolarized measurement we took on the single-sided NMR. (This is a picture from my phone because we were having technical difficulties with saving single-scan data.) Compare to the second figure.

A quick recap: I’m troubleshooting a setup to do hyperpolarization, a technique that allows us to take much faster measurements of chemical samples using NMR (nuclear magnetic resonance, which uses magnets and radio pulses to give you information about chemicals, think MRI) . Hyperpolarization speeds up measurements because it increases the amount of signal you pick […]

Update 5: Putting the Error in Trial and Error

Last week I performed concentration studies with a sacrificial electron donor (SEC) in hopes of establishing a photocatalytic system that produces hydrogen gas. Unfortunately, these experiments were unsuccessful and produced no hydrogen. This may be a result of incompatibility between the catalyst and chromophore used and the sacrificial donor. Luckily, there are many other catalyst/chromophore combinations available to experiment […]

Hyperpolarization Update #6 (I hyperpolarized a thing!)

The black line shows what the signal looks like before the sample is hyperpolarized, and the red line shows what the signal looks like after the sample is hyperpolarized. Notice that for each of the humps on the black line there is a much larger dip in the red line. (Hyperpolarization flips the sign of the signal so the bump goes down instead of up, but the important thing is that the bump is bigger.)

A quick recap: I’m troubleshooting a setup to do hyperpolarization, a technique that allows us to take much faster measurements of chemical samples using NMR (nuclear magnetic resonance, which uses magnets and radio pulses to give you information about chemicals, think MRI) . Hyperpolarization speeds up measurements because it increases the amount of signal you pick […]