Synthesis and Lithographic Evaluation of a Poly(acylsilane)

Backbone-Photodegradable Polymers by Incorporating Acylsilane Monomers via Ring-Opening Metathesis Polymerization

“…These silicon-based moieties can be cleaved through either a Norrish-type homolysis or through the insertion of an α-siloxy carbene, generated via a 1,2- photo Brook rearrangement, into water followed by collapse of the hemiacetal (Figure C). , Either degradation mechanism can enable access to end-functionalized fragments for further chemical modifications. Additionally, polymers prepared by radical polymerization, with acylsilane in their side chains, underwent chemical changes upon UV irradiation. , Moreover, the small size of the acylsilanes was expected to enable straightforward design and synthetic planning of the proposed monomers. Thus, it was envisioned that eight-membered-ring acylsilane-based cyclic olefins would undergo efficient ROMP with other monomers and render a photodegradable polymer backbone.…”

“…Additionally, polymers prepared by radical polymerization, 32 with acylsilane in their side chains, underwent chemical changes upon UV irradiation. 33,34 Moreover, the small size of the acylsilanes was expected to enable straightforward design and synthetic planning of the proposed monomers. Thus, it was envisioned that eight-membered-ring acylsilane-based cyclic olefins would undergo efficient ROMP with other monomers and render a photodegradable polymer backbone.…”