期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 60, 期 35, 页码 19024-19029出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202105496
关键词
chiral mesostructured films; chirality; circularly polarized colour response; optical activity
资金
- National Natural Science Foundation of China [21931008, 21975184, 21873072, 21922304, 21972043]
- science foundation of the Shanghai Municipal science and Technology Commission [19JC1410300]
Through hydrothermal growth using chiral sugar alcohols as symmetry-breaking agents, chiral mesostructured bismuth oxybromide films were fabricated. These films exhibited optical activities over a wide wavelength range of 350-2500 nm and showed a significant chirality-dependent colour response to circularly polarized light, attributed to the hierarchically chiral arrangements of fine size.
Achieving strong and broadband circularly polarized colour responses in chiral inorganic materials is challenging. Here, we fabricated chiral mesostructured bismuth oxybromide (BiOBr) films (CMBFs) via hydrothermal growth using chiral sugar alcohols as symmetry-breaking agents. The layered slabs of BiOBr crystals with weak van-der-Waals interactions are prone to mismatching due to the chiral driving force, resulting in hierarchically chiral arrangements of fine size. Three levels of chirality exist in the CMBFs: primary, helical distortion crystal lattices of a nanoflake, secondary, helical stacking of nanoflakes to form nanoplates, and tertiary, chiral vortexes arranged by nanoplates. The CMBFs displayed optical activities (OAs) over a wide wavelength range of 350-2500 nm with an anisotropic factor of up to 0.99, which led to a significant chirality-dependent colour response to circularly polarized light. The high selectivity can be considered as the result of enhanced resonance due to structural-handedness matching and the synergistic effect of multiple OAs.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据