| 摘要 |
<p>The invention provides a polymeric or oligomeric compound of formula (I), wherein R1 is selected from linear and branched alkyl and alkenyl groups, C6 aromatic rings, substituted C6 aromatic rings, fused aromatic rings, substituted fused aromatic rings, and aralkyl groups, or is absent; R2 is selected from linear and branched alkyl and alkenyl groups, C6 aromatic rings, substituted C6 aromatic rings, linked aromatic rings, fused aromatic rings, substituted fused aromatic rings and aralkyl groups; each X is independently H, alkyl or phenyl or X-N-R2-N-X form a ring in which R2 is alkyl or substituted alkyl and the two X groups together are alkyl or substituted alkyl; and m is an integer greater than or equal to 2. The invention extends to a method of preparing the compound, and to a method of recovering a transition metal from an aqueous solution containing the transition metal.</p> |
