Visible-Light Initiated Free Radical Polymerization by Homomolecular Triplet-Triplet Annihilation

Abstract

monitoring consumption of the olefins in TMPTA as a function of photolysis time. EPR experiments, in conjunction with trapping radical species with 2-methyl-2-nitrosopropane (t-BuNO), identified that acrylate radicals were indeed formed through green light activation. Furthermore, we demonstrate that acrylate polymers of various macroscopic shapes as well as micron-scale objects can be produced using numerous low power visible light sources in the presence of only ZnTPP and TMPTA. These well-defined images represent the general applicability of homomolecular TTA mediated photoinitiated polymerization in both micro-and macro-fabrication applications.

Photoinduced formation of persistent free radicals, hydrogen radicals, and hydroxyl radicals from catechol on atmospheric particulate matter

“…Catechol is a widespread organic precursor in the environment, and the formation potential of EPFRs from catechol under natural conditions and the mechanism and influencing factors need to be clarified. Light irradiation is important for triggering the formation of EPFRs and highly active free radicals in natural environments, and especially in the atmosphere (Awwad et al, 2020;Krapf et al, 2016). It is essential to consider the effect of light irradiation on EPFR formation because it could affect secondary formation of EPFRs in the atmosphere.…”