Abstract
Advancements in externally controlled polymerization methodologies have enabled the synthesis of novel polymeric structures and architectures, and they have been pivotal to the development of new photocontrolled lithographic and 3D printing technologies. In particular, the development of externally controlled ring-opening polymerization (ROP) methodologies is of great interest, as these methods provide access to novel biocompatible and biodegradable block polymer structures. Although ROPs mediated by photoacid generators have made significant contributions to the fields of lithography and microelectronics development, these methodologies rely upon catalysts with poor stability and thus poor temporal control. Herein, we report a class of ferrocene-derived acid catalysts whose acidity can be altered through reversible oxidation and reduction of the ferrocenyl moiety to chemically and electrochemically control the ROP of cyclic esters.
Highlights
The physical properties and functionalities of polymeric materials are directly correlated to their structure and architecture.[1,2,3] While living polymerization methodologies in conjunction with carefully chosen and timed monomer additions produce wellde ned materials, the ability to control chain growth with an external stimulus could lead to many advanced structures and architectures with potentially interesting physical properties
Advancements in externally controlled polymerization methodologies have enabled the synthesis of novel polymeric structures and architectures, and they have been pivotal to the development of new photocontrolled lithographic and 3D printing technologies
ring-opening polymerization (ROP) mediated by photoacid generators have made significant contributions to the fields of lithography and microelectronics development, these methodologies rely upon catalysts with poor stability and poor temporal control
Summary
The physical properties and functionalities of polymeric materials are directly correlated to their structure and architecture.[1,2,3] While living polymerization methodologies in conjunction with carefully chosen and timed monomer additions produce wellde ned materials (e.g., block copolymers2), the ability to control chain growth with an external stimulus could lead to many advanced structures and architectures with potentially interesting physical properties. The development of externally controlled ring-opening polymerization (ROP) methodologies is of great interest, as these methods provide access to novel biocompatible and biodegradable block polymer structures. ROPs mediated by photoacid generators have made significant contributions to the fields of lithography and microelectronics development, these methodologies rely upon catalysts with poor stability and poor temporal control.
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