Photoiniferter polymerization: Illuminating the history, ascendency, and renaissance

In this perspective, we explore the historical evolution, photochemical processes, and distinct utility of photoiniferter polymerization. We aim to provide a practical guide encompassing the selection of iniferter and monomer, coupled with the optimization of light wavelengths to conduct efficient photoiniferter polymerizations. We delve into the impact of iniferter structure on photophysical properties and the resulting polymerization behavior. Furthermore, we highlight ongoing research efforts employing photoiniferter polymerization, emphasizing its potential applications in cutting-edge areas of research such as 3D printing and the synthesis of ultra-high molecular weight polymers ($\ge$10⁶ g mol^-1). Through this perspective, we aim to clarify both the fundamental principles and the practical considerations of photoiniferter polymerization, ultimately advancing its utility and paving the way for innovative applications in polymer science.