Template-Assisted Visible Light-Induced [2 + 2] Photodimerization in a Pseudopolymorphic Binary Solid: Topotactic Transformation vs Photoinduced Crystal Melting

[2 + 2] Photodimerization has been an evergreen topic in organic crystal engineering for a long time. Recent exploitation of an age-old molecule of benzilic acid (BZA) as a template to control such reactions in the solid state accidentally led to a photoinduced crystal-to-liquid transition, also kno...

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Bibliographic Details
Published in:Crystal growth & design 2024-06, Vol.24 (12), p.5193-5199
Main Authors: Ahsan, Mollah Rohan, Varma, Harshit, Mishra, Manish Kumar, Mukherjee, Arijit
Format: Article
Language:English
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Summary:[2 + 2] Photodimerization has been an evergreen topic in organic crystal engineering for a long time. Recent exploitation of an age-old molecule of benzilic acid (BZA) as a template to control such reactions in the solid state accidentally led to a photoinduced crystal-to-liquid transition, also known as photoinduced melting. In this work, we describe two pseudopolymorphs of a BZA-based multicomponent system that shows drastically different photo responses upon photoirradiation. While the native form exhibits topotactic single-crystal to single-crystal transformation, the DCM-solvate is sustained through a photoinduced melting upon photoirradiation. The observation of such drastically different photoresponses in a pseudopolymorphic system is unique and offers an opportunity to investigate responsible structural factors, which can pave the way for future crystal engineering strategies.
ISSN:1528-7483
1528-7505
DOI:10.1021/acs.cgd.4c00426