Our group is focused on developing various catalytic reactions via an electron transfer process using a small organic molecule, phenalenyl. Owing to the ability of phenalenyl based molecules to switch between three redox states, such as cationic closed shell (12 pi electron system), radical open shell (13 pi electron system), and anionic closed shell (14 pi electron system), it can be employed as an electron transfer catalyst for different catalytic transformations. As phenalenyl can retain its aromaticity partially even after reduction by two electrons, we have developed a room temperature C-H arylation reaction from aryl halides. Such activation of aryl halides at room temperature opens up the possibilities to accomplish various C-C cross-coupling reactions under metal-free conditions. We are currently engaged in developing the photochemical and mechanochemical application of such phenalenyl molecule in various metal -free catalytic reactions.