Citation: Lyu, Jiafei; Zhang, Xuan; Li, Peng; Wang, Xingjie; Buru, Cassandra T.; Bai, Peng; Guo, Xianghai; Farha, Omar K. (2019). Exploring the Role of Hexanuclear Clusters as Lewis Acidic Sites in Isostructural Metal--Organic Frameworks. Chemistry of Materials, 31, pp. 4166-.