A new Ca^(2+)two-dimensional framework,namely[Ca(H_(4)L)(DMA)_(2)]·2DMA(Ca-MOF)was obtained from the initial use of N,N’-bis(2,4-dicarboxyphenyl)-oxalamide(H6L).We discovered that this Ca-MOF is capable of excha...A new Ca^(2+)two-dimensional framework,namely[Ca(H_(4)L)(DMA)_(2)]·2DMA(Ca-MOF)was obtained from the initial use of N,N’-bis(2,4-dicarboxyphenyl)-oxalamide(H6L).We discovered that this Ca-MOF is capable of exchanging the Ca^(2+)ions by Cu^(2+)almost quantitatively in a matter of seconds in aqueous solution.The highly efficient Cu^(2+)sorption properties exhibited by the Ca-MOF were investigated in detail via batch ion-exchange studies.In addition,the Ca-MOF was utilized as a stationary phase in an ion-exchange column for Cu^(2+)removal from aqueous media.Furthermore,we were able to recycle the most expensive part of the framework,i.e.the H6L,by treating the column with dilute NaOH followed by HCl.The Ca-MOF represents the first example of any MOF capable of exchanging its constituent metal ions that is shown to be a highly effective ion-exchange material,thus opening a new window in the exploitation of MOFs for ion-exchange applications.展开更多
基金partially supported by the Special Account for Research Grants(SARG)of the National and Kapodistrian University of Athens(UoA).
文摘A new Ca^(2+)two-dimensional framework,namely[Ca(H_(4)L)(DMA)_(2)]·2DMA(Ca-MOF)was obtained from the initial use of N,N’-bis(2,4-dicarboxyphenyl)-oxalamide(H6L).We discovered that this Ca-MOF is capable of exchanging the Ca^(2+)ions by Cu^(2+)almost quantitatively in a matter of seconds in aqueous solution.The highly efficient Cu^(2+)sorption properties exhibited by the Ca-MOF were investigated in detail via batch ion-exchange studies.In addition,the Ca-MOF was utilized as a stationary phase in an ion-exchange column for Cu^(2+)removal from aqueous media.Furthermore,we were able to recycle the most expensive part of the framework,i.e.the H6L,by treating the column with dilute NaOH followed by HCl.The Ca-MOF represents the first example of any MOF capable of exchanging its constituent metal ions that is shown to be a highly effective ion-exchange material,thus opening a new window in the exploitation of MOFs for ion-exchange applications.
