More than 200 molecules have been detected in interstellar medium (ISM) and circumstellar envelope. ISM is not homogeneous rather it varies in density and temperature. The chemical and physical processes those occur in different portions of heterogeneous interstellar medium are responsible for formation and depletion of ISM molecules. Among these processes is ion-neutral reactions. Due to strong attractive force between ion and permanent or induced dipole on the neutral, many ion- neutral reactions proceed at a large rate at room temperature and below that. The rates of these reactions are critical towards the abundance of different species in ISM. We have built a 22-pole radiofrequency (RF) ion trap set-up in our lab with the motive to study ion-neutral reactions akin to ISM environment. Trapping of both positive (SF+) and negative (SF-, F-) ions have been done for about few
milliseconds. We have also performed photoelectron spectroscopy (PES) on AlF anion at the recently developed PES set-up in our lab. Vibrational spacing of neutral and its electron affinity are measured. The details of trap set-up and results of photoelectron spectroscopy on AlF anion will be discussed in the research proposal seminar along with future plans.