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Spontaneous chiral symmetry breaking in a single crystal
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Chiral symmetry breaking (CSB) under the nonequilibrium open conditions is a ubiquitous phenomenon in the universe, whereas molecular-level CSB is limited. Only the preferential enrichment and Viedma ripening that occur during the crystallization process from a solution are known. Herein, we discovered the third category of CSB, which is complete CSB within a single crystal. A racemic crystal of 3-(4-(benzo[d]thiazol-2-yl)phenyl)-10-propyl-10H-phenothiazine, a phenothiazine derivative with chirality, undergoes a single-crystal-to-single-crystal structural transition to a chiral crystal. Furthermore, the chirality after the transition could be controlled by solid-seeding of a chiral crystal. The resulting chiral single crystals exhibited circularly polarized luminescence (CPL) properties (glum = 8.9 × 10−4). This discovery provide a simple model of CSB and stimuli-responsive materials involving the CSB phenomenon.
American Chemical Society (ACS)
Title: Spontaneous chiral symmetry breaking in a single crystal
Description:
Chiral symmetry breaking (CSB) under the nonequilibrium open conditions is a ubiquitous phenomenon in the universe, whereas molecular-level CSB is limited.
Only the preferential enrichment and Viedma ripening that occur during the crystallization process from a solution are known.
Herein, we discovered the third category of CSB, which is complete CSB within a single crystal.
A racemic crystal of 3-(4-(benzo[d]thiazol-2-yl)phenyl)-10-propyl-10H-phenothiazine, a phenothiazine derivative with chirality, undergoes a single-crystal-to-single-crystal structural transition to a chiral crystal.
Furthermore, the chirality after the transition could be controlled by solid-seeding of a chiral crystal.
The resulting chiral single crystals exhibited circularly polarized luminescence (CPL) properties (glum = 8.
9 × 10−4).
This discovery provide a simple model of CSB and stimuli-responsive materials involving the CSB phenomenon.
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