This case study investigates photochromism and radical generation in different polymorphs, suggesting a complex interplay between their properties.
Two polymorphs of the OMe-BDPI-DMF solvates were obtained by tuning the crystallization conditions. The needle-shaped polymorph exhibits photochromism, while the prism-shaped form remains nonphotochromic; both, however, generate radicals upon photoirradiation. Structural analyses reveal that subtle variations in intermolecular interactions underpin and interconnect these distinct photophysical behaviors.
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Dutta et al. (2026) studied this question.
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