Mechanoactivated amorphization and photopolymerization of styryldipyryliums.

Autor: Usuba J; Department of Chemistry, Brandeis University, 415 South Street, Waltham, MA 02453 USA., Sun Z; Department of Chemistry, Brandeis University, 415 South Street, Waltham, MA 02453 USA., Nguyen HPQ; Department of Chemistry, Brandeis University, 415 South Street, Waltham, MA 02453 USA., Raju C; Department of Chemistry, Brandeis University, 415 South Street, Waltham, MA 02453 USA., Schmidt-Rohr K; Department of Chemistry, Brandeis University, 415 South Street, Waltham, MA 02453 USA., Han GGD; Department of Chemistry, Brandeis University, 415 South Street, Waltham, MA 02453 USA.
Jazyk: angličtina
Zdroj: Communications materials [Commun Mater] 2024; Vol. 5 (1), pp. 98. Date of Electronic Publication: 2024 Jun 08.
DOI: 10.1038/s43246-024-00539-8
Abstrakt: Conventional topochemical photopolymerization reactions occur exclusively in precisely-engineered photoactive crystalline states, which often produces high-insoluble polymers. To mitigate this, here, we report the mechanoactivation of photostable styryldipyrylium-based monomers, which results in their amorphization-enabled solid-state photopolymerization and produces soluble and processable amorphous polymers. A combination of solid-state nuclear magnetic resonance, X-ray diffraction, and absorption/fluorescence spectroscopy reveals the crucial role of a mechanically-disordered monomer phase in yielding polymers via photo-induced [2 + 2] cycloaddition reaction. Hence, mechanoactivation and amorphization can expand the scope of topochemical polymerization conditions to open up opportunities for generating polymers that are otherwise difficult to synthesize and analyze.
Competing Interests: Competing interestsThe authors declare no competing interests.
(© The Author(s) 2024.)
Databáze: MEDLINE
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