KCS

The gas-phase spectroscopy is a very useful way to study detailed characteristics of molecules that can not be seen by liquid-phase spectroscopy and others. To do this gas-phase spectroscopy, naturally, we should make gas-phase molecules from solid or liquid-phase. Heating is a simple and stable method to vaporize a sample. For big or chemically unstable molecules, however, heating is not a good method because of thermal-decomposition. So, if we use heating to make gas-phase molecules, then we can only study very limited number of molecules, not bio-molecules. For this reason, laser-desorption technique is used to avoid this thermal-decomposition problem. In this poster, we show the REMPI spectrum of laser-desorbed tryptophan.