A 1-D coordination polymer[Sm(HL)_(2)(NO_(3))]_(n)(1)was constructed using a new flexible Schiff base ligand that has a long-chain(CH_(2))10 backbone.The Schiff base ligand exhibits a linear coordination configuration...A 1-D coordination polymer[Sm(HL)_(2)(NO_(3))]_(n)(1)was constructed using a new flexible Schiff base ligand that has a long-chain(CH_(2))10 backbone.The Schiff base ligand exhibits a linear coordination configuration,resulting in the“zig-zag”structure of 1.Besides the ligand-centered emission,1 displays typical visible and NIR luminescence of Sm^(3+).Interestingly,1 shows dual-emissive response to metal ions,especially to Co^(2+)at the ppm level.展开更多
Two 9-metal lanthanide nanoclusters[Ln_(9)L1(L_(2))_(2)(OAc)_(15)(OH)_(8)(H_(2)O)_(2)(DMF)](Ln=Nd(1)and Gd(2))were synthesized using a long Schiff base ligand with a Ph-O-Ph-O-Ph backbone(H_(2)L1)and a short tridentat...Two 9-metal lanthanide nanoclusters[Ln_(9)L1(L_(2))_(2)(OAc)_(15)(OH)_(8)(H_(2)O)_(2)(DMF)](Ln=Nd(1)and Gd(2))were synthesized using a long Schiff base ligand with a Ph-O-Ph-O-Ph backbone(H_(2)L1)and a short tridentate aromatic ligand(H_(2)L_(2)).1 and 2 show grape-like structures with sizes of about 11×17×22A.In 1,the chromogenic ligands can sensitize the NIR luminescence of Nd^(3+)ions.Interestingly,1 exhibits luminescence response to both metal ions and nitro explosives,and shows high sensitivity to Cd^(2+),Zn_(2)+,Cu_(2)+and Co_(2)+ions and explosive HMX at the ppm level.展开更多
Extraction of metal ions into perfluorocarbon solvents using fluorinated ligands has shown promise in a number of applications ranging from catalysis to biomedical imaging.However,the speciation of the extracted metal...Extraction of metal ions into perfluorocarbon solvents using fluorinated ligands has shown promise in a number of applications ranging from catalysis to biomedical imaging.However,the speciation of the extracted metal complexes is poorly understood hindering the design and implementation of new fluorous extraction systems.The extraction of s-,p-,d-,and f-block metal ions from the aqueous phase to the fluorous phase(perfluoro-15-crown-5 ether)with a fluorinated acetylacetonate pro-ligand was investigated and the speciation of the extracted metal complexes characterized,including coordinatively saturated mononuclear and polynuclear species and coordinatively unsaturated mononuclear species.The leaching of these species back into aqueous media was studied along with the effects of synergistic extraction using a combination of fluorinated acac and nonfluorinated neutral ligands.Our findings indicate that formation of coordinatively saturated mononuclear metal complexes in the fluorous phase is essential for retaining extracted species and suggest an important role for synergistic extraction for metal ions that do not form these types of metal complexes with acac ligands alone.展开更多
基金supported by the National Natural Science Foundation of China(No.21771141)Key Foundation for High-level Talents Innovation Technology Projects of Wenzhou(2019).
文摘A 1-D coordination polymer[Sm(HL)_(2)(NO_(3))]_(n)(1)was constructed using a new flexible Schiff base ligand that has a long-chain(CH_(2))10 backbone.The Schiff base ligand exhibits a linear coordination configuration,resulting in the“zig-zag”structure of 1.Besides the ligand-centered emission,1 displays typical visible and NIR luminescence of Sm^(3+).Interestingly,1 shows dual-emissive response to metal ions,especially to Co^(2+)at the ppm level.
基金supported by the National Natural Science Foundation of China(No.21771141).
文摘Two 9-metal lanthanide nanoclusters[Ln_(9)L1(L_(2))_(2)(OAc)_(15)(OH)_(8)(H_(2)O)_(2)(DMF)](Ln=Nd(1)and Gd(2))were synthesized using a long Schiff base ligand with a Ph-O-Ph-O-Ph backbone(H_(2)L1)and a short tridentate aromatic ligand(H_(2)L_(2)).1 and 2 show grape-like structures with sizes of about 11×17×22A.In 1,the chromogenic ligands can sensitize the NIR luminescence of Nd^(3+)ions.Interestingly,1 exhibits luminescence response to both metal ions and nitro explosives,and shows high sensitivity to Cd^(2+),Zn_(2)+,Cu_(2)+and Co_(2)+ions and explosive HMX at the ppm level.
基金funding from the Welch Foundation(EQ:F-1883,RJ:F-816)the Cancer Prevention Research Institute of Texas(EQ:RP200223)the support of a fellowship from the“la Caixa”Banking Foundation(ID 100010434,Fellowship code:LCF/BQ/AA17/11610005).
文摘Extraction of metal ions into perfluorocarbon solvents using fluorinated ligands has shown promise in a number of applications ranging from catalysis to biomedical imaging.However,the speciation of the extracted metal complexes is poorly understood hindering the design and implementation of new fluorous extraction systems.The extraction of s-,p-,d-,and f-block metal ions from the aqueous phase to the fluorous phase(perfluoro-15-crown-5 ether)with a fluorinated acetylacetonate pro-ligand was investigated and the speciation of the extracted metal complexes characterized,including coordinatively saturated mononuclear and polynuclear species and coordinatively unsaturated mononuclear species.The leaching of these species back into aqueous media was studied along with the effects of synergistic extraction using a combination of fluorinated acac and nonfluorinated neutral ligands.Our findings indicate that formation of coordinatively saturated mononuclear metal complexes in the fluorous phase is essential for retaining extracted species and suggest an important role for synergistic extraction for metal ions that do not form these types of metal complexes with acac ligands alone.
