Mechanoactivated amorphization and photopolymerization of styryldipyryliums.

Junichi Usuba, Zhenhuan Sun, Han P Q Nguyen, Cijil Raju, Klaus Schmidt-Rohr, Grace G D Han

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Article in Communications materials, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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6 authors.

Junichi UsubaDepartment of Chemistry, Brandeis University, 415 South Street, Waltham, MA 02453 USA.

Zhenhuan SunDepartment of Chemistry, Brandeis University, 415 South Street, Waltham, MA 02453 USA.

Han P Q NguyenDepartment of Chemistry, Brandeis University, 415 South Street, Waltham, MA 02453 USA.ORCID 0009-0007-4654-2138

Cijil RajuDepartment of Chemistry, Brandeis University, 415 South Street, Waltham, MA 02453 USA.

Klaus Schmidt-RohrDepartment of Chemistry, Brandeis University, 415 South Street, Waltham, MA 02453 USA.

Grace G D HanDepartment of Chemistry, Brandeis University, 415 South Street, Waltham, MA 02453 USA.ORCID 0000-0002-2918-1584

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6 · The paper itself

Abstract

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.

Indexed as

Materials chemistryPolymers

Identifiers

PMID38859933

DOI10.1038/s43246-024-00539-8

PMCPMC11162349

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