摘要
固体酸是工业烃转化和生物质精炼中应用最广泛的非均相催化剂之一,了解它们的局部结构和酸性等性质有利于合理设计高效绿色固体酸催化剂,从而提高目标反应的活性和稳定性.近年来,固体核磁共振波谱在定性和定量表征固体酸的局部结构和酸性方面已显示出巨大的应用潜力,甚至可作为一种标准方法.二维固体核磁共振波谱的应用可以进一步揭示固体酸表面位点的结构对称性和不同位点的空间构效关系,从而加深对“催化剂结构-酸性-活性关系”的理解.在这篇综述中,我们总结了用于固体酸表征的固体核磁共振波谱方法和常规实验操作流程,并着重阐述了在使用和不使用探针分子的情况下,固体核磁共振波谱应用于固体酸局部结构和酸性性质研究的进展.
Solid acid is one of the most widely applied heterogeneous catalysts for industrial hydrocarbon conversion and biomass refining.It is crucial to understand the nature of solid acid such as its local structure and acidic properties.Such knowledge renders effective design of solid acid with better activity and stability for the desired reaction.Recently,solid-state nuclear magnetic resonance(SSNMR)spectroscopy has been applied as a powerful standard method for characterizing the local structure and acidic nature of solid acid in both qualitative and quantitative manners.Additionally,the applications of advanced two-dimensional SSNMR methodologies further reveal the symmetry of surface sites,spatial relationship of different sites,and thereby unmasking the structure-activity relationship.In this review,we summarize the general methods and SSNMR techniques for the routine characterization,focusing on the progresses in the understanding of local structure and acidic properties of solid acids via the application of SSNMR with or without probe molecules.
作者
杨文杰
黄骏
YANG Wen-jie;HUANG Jun(Laboratory for Catalysis Engineering,School of Chemical and Biomolecular Engineering,Sydney Nano Institute,the University of Sydney,NSW 2006,Australia)
出处
《波谱学杂志》
CAS
北大核心
2021年第4期460-473,共14页
Chinese Journal of Magnetic Resonance
基金
Australian Research Council Discovery Projects(DP150103842,DP180104010).
关键词
布鲁斯酸
路易斯酸
固体酸
酸位结构
固体核磁共振波谱
Brønsted acid sites
Lewis acid sites
solid acid
acid site structure
solid-state nuclear magnetic resonance(SSNMR)spectroscopy
