Fluorescence up-conversion technique in investigating mechanistic and kinetic details of ultrafast photoinduced processes

Present article is aimed to provide a brief account of the state-of-the-art ultrafast fluorescence up-conversion (FUC) facility developed in the Radiation & Photochemistry Division (RPCD), Chemistry Group (CG), BARC, and to discuss the usages of this facility in exploring the insides of different ultrafast photoinduced processes, which are otherwise not possible by using conventional photophysical measurements having lower time resolutions. In this article, the FUC facility as developed in RPCD is discussed fist, and subsequently a few selected ultrafast studies carried out by using this facility have been presented in brief, bringing out how this facility was useful to get intriguing mechanistic insides of these processes, which are having direct relevance to many practical applications. (author)