ArticleAdvanced science (Weinheim, Baden-Wurttemberg, Germany)2026
Halogen-Bond Coupled Halogenated-π-Conjugation Enables Giant Birefringence in Hydrogen-Bonded Organic Frameworks.
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. Cited by 1 paper.
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1 citing paper in PubMed.
- Lock-and-Key Assembly Enables Record Birefringence in Monocyclic π-Conjugated Crystals via Spatial Confinement of Linear Polyhalide.Angewandte Chemie (International ed. in English) · 2026Article
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7 authors.
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Abstract
Birefringent crystals are essential optical materials for modulating and detecting the polarization state of light. However, achieving large optical anisotropy remains a significant challenge, mainly because it is difficult to rationally align anisotropic fundamental building blocks (FBBs) to maximize their collective contribution. Here, we propose a halogen-bond (XB) coupled halogenated-π-conjugation strategy. Using hydrogen-bonded pyridinedicarboxylic acid as a template, we synthesized XOF-1, Hybrid-XOF-1, and XB-HOF-1 through decarboxylation-halogenation reactions. All three compounds are built from 0D halogen-bonded FBBs and extended by halogen and/or hydrogen bonds. Notably, all three compounds exhibit large birefringence (0.69-0.97), with XB-HOF-1 reaching Δn = 0.97 @ 546 nm, over 80 times that of the commercial benchmark MgF
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