Macroscopic Twisting of Chiral Metal Halide Single Crystals Driven by Thermo-Induced Topochemical Dehydration

作者：Mingyang Xin, Puxin Cheng, Rongchao Shi, Junjie Guan, Xiao Han, Zhihua Wang, Quan-Wen Li, Geng Li, Yongshen Zheng, Jialiang Xu, Xian‐He Bu · 发表于：Journal of the American Chemical Society · 年份：2024 · DOI：10.1021/jacs.4c10507 · 被引用次数：29 · 研究领域：Perovskite Materials and Applications、Polydiacetylene-based materials and applications、Synthesis and Properties of Aromatic Compounds

Dynamic twisting crystals, combining the features of dynamic crystals and twisting crystals, promise advanced applications in targeted drug delivery, biosensors, microrobots, and spiral optoelectronics. However, the determination of dynamic twisting crystals with specific directions remains a formidable challenge in practical applications. Herein, based on organic-inorganic hybrid metal halide (OIHMH) single crystals, we have realized the chirality-induced macroscopic twisting of single crystals driven by a thermo-induced topochemical dehydration reaction. These crystals exhibit molecular-chirality-induced twisting upon heating, along with reversals in their linear chiroptical circular dichroism and nonlinear chiroptical second harmonic generation circular dichroism. Such an induced twisting has been attributed to the alteration of the helical arrangement of chiral cation post-topochemical dehydration. The feasibility of tuning the macroscopic twisting of OIHMH single crystals and the switching in their linear and nonlinear chiroptical properties might open up new avenues for developing dynamic crystals for microactuating and optoelectronic applications.