Tailor-Made Hybrid Organic–Inorganic Porous Materials Based on Polyhedral Oligomeric Silsesquioxanes (POSS) by the Step-Growth Mechanism of Thiol-Ene 'Click' Chemistry

摘要

The term "click" chemistry originates with Barry Sharpless who codified its philosophy.~([1]) Click reactions have since been associated with particular characteristics, such as high yields, functional group, solvent and oxygen tolerance, as well as absence of byproducts and the associated easy purification.~([2]) The thiol-ene addition reaction may also fit within this concept.~([3]) Radical-mediated polymerizations with this reaction may proceed exclusively through a step-growth pathway or through a combination of a step- and chain-growth pathway. This depends on the nature of the thiol and alkene involved, and, as a result on the nature of the thyil radical, the intermediate carbon-centered radical and their stabilities.~([4])