设计以孤对电子为化学剪刀的二维范德华氧化物。

IF 16.3 1区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES National Science Review Pub Date : 2024-10-21 eCollection Date: 2025-01-01 DOI:10.1093/nsr/nwae370
Zhipeng Du, Xu Chen, Wei Liu, Han Wang, Qianting Xu, Xiaoying Shang, Yipeng Song, Xueyuan Chen, Junhua Luo, Sangen Zhao
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引用次数: 0

摘要

二维(2D)范德华(vdW)材料以其有趣的物理性质而闻名,但它们的合理设计和合成仍然是化学家面临的巨大挑战。在这项工作中,我们成功地合成了一种新的非中心对称氧化物,即InSbMoO6,用Sb3+的孤对电子作为化学剪刀,生成了它的二维vdW晶体结构。通过简单的机械剥离,可以很容易地获得单层和少层的InSbMoO6薄片。它们表现出强烈的二次谐波产生(SHG)响应,具有有效的二阶非线性光学磁化率[公式:见文本]为32.4 pm·V-1。同时,SHG响应是面内各向异性的,与层厚度成正比,与层宇称无关。此外,InSbMoO6薄片具有优异的热稳定性和大气稳定性,在拉曼光谱中具有明显的各向异性。这项工作表明,利用孤对电子作为化学剪刀是设计和合成用于集成光子应用的新型二维vdW材料的有效策略。
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Designing a 2D van der Waals oxide with lone-pair electrons as chemical scissor.

Two-dimensional (2D) van der Waals (vdW) materials are known for their intriguing physical properties, but their rational design and synthesis remain a great challenge for chemists. In this work, we successfully synthesized a new non-centrosymmetric oxide, i.e. InSbMoO6, with Sb3+ lone-pair electrons serving as chemical scissor to generate its 2D vdW crystal structure. Monolayer and few-layer InSbMoO6 flakes are readily obtained via facile mechanical exfoliation. They exhibit strong second-harmonic generation (SHG) response with an effective second-order nonlinear optical susceptibility [Formula: see text]of 32.4 pm·V-1. Meanwhile, the SHG response is in-plane anisotropic and directly proportional to the layer thickness, independent of layer parity. In addition, the InSbMoO6 flakes exhibit excellent thermal and atmospheric stability, along with pronounced anisotropy in Raman spectroscopy. This work implies that using lone-pair electrons as chemical scissor is an effective strategy for designing and synthesizing new 2D vdW materials for integrated photonic applications.

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来源期刊
National Science Review
National Science Review MULTIDISCIPLINARY SCIENCES-
CiteScore
24.10
自引率
1.90%
发文量
249
审稿时长
13 weeks
期刊介绍: National Science Review (NSR; ISSN abbreviation: Natl. Sci. Rev.) is an English-language peer-reviewed multidisciplinary open-access scientific journal published by Oxford University Press under the auspices of the Chinese Academy of Sciences.According to Journal Citation Reports, its 2021 impact factor was 23.178. National Science Review publishes both review articles and perspectives as well as original research in the form of brief communications and research articles.
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