波谱学杂志2024，Vol.41Issue(3)：315-321,7.DOI:10.11938/cjmr20243104
二氧化硅颗粒堆积空隙中氢气分子的核磁共振谱学特征研究
Studies on the 1H NMR Spectral Features of Hydrogen Molecules in the Interstices of SiO2 Particles
摘要
Abstract
1H NMR spectral features of hydrogen molecules in the stacking interstices of silicon dioxide(SiO2)microspheres with different sizes are studied in the present article.The chemical shift of hydrogen molecules is observed to gradually shift towards higher fields as the size of the stacking interstices decreases.Combined with experimental results of variable temperature hydrogen spectroscopy,self-diffusion coefficients measurement,and scanning electron microscopy,the observed phenomenon is attributed to two factors,namely,1)the microsphere size-dependent local magnetic field inhomogeneity in the stacking interstices caused by the diamagnetic SiO2 microspheres;and 2)the rapid exchange among hydrogen molecules experiencing different local fields within the microsphere interstices.The results of this study demonstrate the potential of hydrogen gas as a probe molecule for measuring micro-and nano-scale pore sizes.关键词
氢气/二氧化硅/堆积空隙/核磁共振/化学位移Key words
hydrogen gas/silicon dioxide/stacking interstices/NMR/chemical shift分类
数理科学引用本文复制引用
王行乐,邵正泽,董洪春,魏达秀,陈群,姚叶锋..二氧化硅颗粒堆积空隙中氢气分子的核磁共振谱学特征研究[J].波谱学杂志,2024,41(3):315-321,7.基金项目
上海市科委"科技创新行动计划"项目(22142200800). （22142200800）
