A novel water-stable Tb-based metal–organic framework(Tb-MOF),namely{[Tb(CA)(OA)_(0.5)(H_(2)O)_(2)]·H_(2)O}_(n)(H_(2)CA=chelidonic acid;H_(2)OA=oxalic acid),was synthesized via a solvothermal method.Tb-MOF was s...A novel water-stable Tb-based metal–organic framework(Tb-MOF),namely{[Tb(CA)(OA)_(0.5)(H_(2)O)_(2)]·H_(2)O}_(n)(H_(2)CA=chelidonic acid;H_(2)OA=oxalic acid),was synthesized via a solvothermal method.Tb-MOF was studied for its highly sensitive detection towards nitrite,which is a hazardous chemical in water and food.As a luminescent sensor,Tb-MOF displays a linear detection range between 0 and 15.6μM,with a limit of detection of 28.25 nM.Dynamic quenching process was observed in this system and was studied in detail.A mechanism study revealed that the fluorescence response of Tb-MOF towards nitrite was due to the energy transfer from the sensitized Tb^(3+) ion to the nitrite.展开更多
基金supported by the National Natural Science Foundation of China(grant numbers 21931004 and 21861130354)the Natural Science Foundation of Tianjin(18JCJQJC47200)+1 种基金the Fundamental Research Funds for the Central Universities,Nankai University(63201016 and 63201043)the Ministry of Education of China(grant number B12015).
文摘A novel water-stable Tb-based metal–organic framework(Tb-MOF),namely{[Tb(CA)(OA)_(0.5)(H_(2)O)_(2)]·H_(2)O}_(n)(H_(2)CA=chelidonic acid;H_(2)OA=oxalic acid),was synthesized via a solvothermal method.Tb-MOF was studied for its highly sensitive detection towards nitrite,which is a hazardous chemical in water and food.As a luminescent sensor,Tb-MOF displays a linear detection range between 0 and 15.6μM,with a limit of detection of 28.25 nM.Dynamic quenching process was observed in this system and was studied in detail.A mechanism study revealed that the fluorescence response of Tb-MOF towards nitrite was due to the energy transfer from the sensitized Tb^(3+) ion to the nitrite.
