The atmosphere of Saturn's Moon contains a high concentration of suspended particles and surrounds it as an orange-brown shell. Some of these so-called aerosols, which can also serve as condensation nuclei for clouds, absorb the UV light of the sun. There are various theories for their creation, some of which contradict each other. The Hawaiian scientists were now able to clarify the question of how these UV-absorbing polyyne molecules originated in the Titan atmosphere. In their experiments, they shot the individual constituents of the polyynes at supersonic speed into a chamber filled with the gas deuterium. They allowed the molecular currents to collide and examined the weight and speed of the resulting products. The researchers found that collisions of individual particles give the polymers with the triple bonds.
This chemical reaction takes place without energy being required. This explains how titanium can connect to each other on Titan. If there were a barrier that must first be overcome by some form of energy, as is the case with many other chemical reactions, this might prevent the formation of the polyyne molecules. During the experiments, the researchers used very sensitive instruments to monitor the changes in energy levels during the individual reaction steps.Xibin Gu (University of Hawaii in Manoa) et al .: PNAS (doi: 10.1073 / pnas.0900525106). ddp / science.de? Martina Bisculm advertisement