Reversible transformation of single-crystal two-dimensional polymer framework for photo/thermal reversible photolithography.

ABSTRACT: The preparation of large-sized single crystals of two-dimensional covalent organic frameworks (2D COFs) or 2D polymers is already a highly challenging task, and the study of reversible transformations of such materials in their single-crystalline state remains an unexplored research area. Herein, we demonstrate a successful photo/thermal reversible transformation between a 2D polymer framework and its monomer while maintaining single-crystal integrity. By photopolymerization under UV light and thermal depolymerization at elevated temperatures, repeatable structural transitions were achieved in a single-crystal state. Leveraging this reversible behavior, a thin-film material with rewritable photolithographic properties was developed. Patterns could be inscribed using UV light and erased or

SUBMITTER: Wang H 

PROVIDER: S-EPMC12329580 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature