ArticleAdvanced science (Weinheim, Baden-Wurttemberg, Germany)2026
Solvent-Desorption-Induced Formation of a Long-Period Polymorph Yielding a High-Performance Porphyrin-Based Organic Semiconductor.
Article in Advanced science (Weinheim, Baden-Wurttemberg, Germany), 2026. 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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Abstract
Polymorphism is common in organic semiconductors, yet experimentally accessible crystal structures are often limited to thermodynamically favored phases formed under equilibrium crystallization conditions. Here, we report a structural transformation in single crystals of 5,15-bisphenyl-tetrabenzoporphyrin (Ph-BP) triggered by the removal of intercalated o-dichlorobenzene. This transformation induces a 90° rotation of the π-stacking direction between adjacent layers, giving rise to a previously unobserved long-period polymorph characterized by the periodic alternation of two distinct herringbone packing motifs. The solvent-desorption-induced transformed phase can also be formed on Si/SiO
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