无机-有机二氧化硅-联苯甲酰复合材料的纳米结构：合成、纳米晶体形态及显微拉曼分析

Nanoarhitectonics of Inorganic-Organic Silica-Benzil Composites: Synthesis, Nanocrystal Morphology and Micro-Raman Analysis.

作者信息

Shchur Yaroslav, Bendak Andrii, Beltramo Guillermo, Andrushchak Anatoliy S, Vitusevich Svetlana, Pustovyj Denys, Sahraoui Bouchta, Slyvka Yurii, Kityk Andriy V

机构信息

Institute for Condensed Matter Physics, 1 Svientsitskii Str., 79011 Lviv, Ukraine.

Department of Applied Physics and Nanomaterials Science, Lviv Polytechnic National University, 12 S. Bandery Str., 79013 Lviv, Ukraine.

出版信息

Nanomaterials (Basel). 2023 Jun 23;13(13):1913. doi: 10.3390/nano13131913.

DOI:10.3390/nano13131913

PMID:37446429

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10343406/

Abstract

The synthesis of nanosized organic benzil (C6H5CO)2 crystals within the mesoporous SiO2 host matrix was investigated via X-ray diffraction, transmission electron microscopy, Raman spectroscopy, and lattice dynamics analysis. Combining these methods, we have proved that the main structural properties of benzil nanocrystals embedded into SiO2 host membranes with pore diameters of 6.0, 7.8, 9.4, and 13.0 nm are preserved compared to a bulk benzil crystal. Space confinement has an insignificant impact on the lattice vibrational properties of benzil crystals implanted into the host matrices. The lattice dynamics calculation of the phonon spectrum in the Brillouin zone center shows the mechanical and dynamical stability of benzil lattice, revealing very low optical frequency of 11 cm-1 at point Γ.

摘要

通过X射线衍射、透射电子显微镜、拉曼光谱和晶格动力学分析，研究了介孔SiO₂主体基质中纳米级有机联苯甲酰（C₆H₅CO）₂晶体的合成。结合这些方法，我们已经证明，与块状联苯甲酰晶体相比，嵌入孔径为6.0、7.8、9.4和13.0 nm的SiO₂主体膜中的联苯甲酰纳米晶体的主要结构特性得以保留。空间限制对植入主体基质中的联苯甲酰晶体的晶格振动特性影响不大。布里渊区中心声子谱的晶格动力学计算表明联苯甲酰晶格的力学和动力学稳定性，在Γ点揭示了非常低的11 cm⁻¹光学频率。