A preorganized structure with two positive nitrogen ions linked by a carbon atom was designed. This structure acts like crab pincers to tightly entrap chromate. The adsorbent based on the designed structure incorporated into graphene oxide (PS-GO) has a dramatically enhanced binding affinity to Cr(VI) under neutral conditions.
L. Jin, G. Sun, H. Zhang, G. Yuan, J. Ma, X. Peng and Y. Cui, Chem. Commun., 2019, 55, 3485 DOI: 10.1039/C9CC00940J
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