Synergistic engineering of ultraviolet metal-free crystals with exceptional birefringence <i>via</i> pyridine-derived dimers.

ABSTRACT: Crystals with giant birefringence are essential for practical applications in lasers, optical communication, and polarimetry, where precise control of polarized light is critical. Coplanar six-membered ring (6-MR) primitives with large polarizability anisotropy are particularly effective in enhancing birefringence. This study successfully combines different pyridine derivatives into two novel metal-free crystals: supramolecular one-dimensional [(4-HP)(4-H₂P)][3-pySO₃] (1; HP = hydroxypyridine; py = pyridine) and two-dimensional [4-AP][3-pySO₃] (2; AP = aminopyridne), synthesized via a facile aqueous solution method. Compound 1 features unique [4-HP/4-H₂P]⁺ cationic dimer pairs linked by hydrogen bonds, in contrast to the single

SUBMITTER: Lu J 

PROVIDER: S-EPMC11808400 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature