Citation: Duan, Yuefeng; Huang, Yuhang; Wang, Chongqing; Wang, Qian; Ge, Kai; Lu, Zhiyong; Wang, Huijie; Duan, Jingui; Bai, Junfeng; Jin, Wanqin (2023). Formation and fine-tuning of metal--organic frameworks with carboxylic pincers for the recognition of a C2H2 tetramer and highly selective separation of C2H2/C2H4. Chemical Science, 14, pp. 4605-4611.