| 초록 |
A strained ring, such as an epoxy group, is described as a spring-loaded system ready to open and release the strain when a suitable nucleophile; such as a thiol molecule, comes along. Repetition of following two steps: i) thiolate formation by the alkoxide anion or the catalyst present in the system, and ii) epoxide ring opening reaction by the thiolate anion, would result in the formation of a polymeric product. Since quenching of the alkoxide anion through protonation is the critical step, the polymerizations are called ‘proton transfer polymerization’. Our goal in this presentation would be to demonstrate, for the very first time, that a photochemical stimulus can be applied to initiate such a proton transfer polymerization process and nanometer and micrometer-sized hydrogel features can be prepared by employing micromolding in capillaries and imprint lithography-based fabrication strategies. |
