Applications To The Parahydrogen Induced Polarization Technique And Photocatalytic Water Splitting Reaction

In situ NMR(nuclear magnetic resonance) can real-time monitor a reaction and provide much information on molecules. In this work, we studied the parahydrogen induced polarization technique and photocatalytic water splitting reaction by in situ NMR.PHIP (Parahydrogen Induced Polarization) technique can significantly enhance NMR signals and thus has shown a great prospect in chemistry, biology and medical science and so on. In the practical application, however, the NMR signal enhancement of PHP is often limited by the experiment setup. In this work, we will demonstrate how to optimize the signal enhancement in PHIP experiments by adjusting the experimental conditions, including temperature, pressure and the way to introduce parahydrogen into the PHIP experiment. The reaction system of 1-hexyne and [Rh(COD)(dppb)]BF4 is chosen for this purpose.Photocatalytic water splitting is an important way to develop the H2 energy. To develop high efficient, low price and stable catalyst, understanding the processes and mechanism of the photocatalytic water splitting reaction is a key point. In this work, we detected the hydrogen molecule signal in the water splitting reaction. With liquid NMR technique, we analysied the decomposition products of methanol and studied the the processes and mechanism of methanol dissociation.