Due to ion-selective accumulation, the osmotic potential ( V os ) exhibited an increasing and then a decreasing trend versus the concentration gradient ( C H /C L ), while the positive osmotic current ( I os ) increased from 22 to 47 nA, demonstrating a cation selectivity at pH = 3.5 (Fig. 5c ) 43 .
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Synthesis of crystalline two-dimensional conjugated polymers through irreversible chemistry under mild conditions.
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