The exploration of a dual-functional sensor is the key to effectively detect the Cr(Ⅵ)and Fe(Ⅲ)cations in water,which is important to human health and environmental sustainability.Because of the phase stability and ...The exploration of a dual-functional sensor is the key to effectively detect the Cr(Ⅵ)and Fe(Ⅲ)cations in water,which is important to human health and environmental sustainability.Because of the phase stability and excellent luminescence,the rare-earth coordination polymers have great potential as dual-functional sensors.Here,we develop a Y_(0.91)Eu_(0.09)(H_(2)O)_(2){C_(6)H_(3)(CO_(2))_(3)}(MIL-92(Y):9%Eu^(3+))-based dual-function luminescent sensor on Cr(Ⅵ)and Fe(Ⅲ),which exhibits excellent phase stability and dispersibility in water.The luminescence of MIL-92(Y):9%Eu^(3+)aqueous suspension quenches on Fe^(3+)with Stern-Volmer constant K_(sv) of 1.79×10^(3)M^(-1)and limit of detection of 17μM.The MIL-92(Y):9%Eu^(3+)aqueous suspension also has turn-off sensing ability towards Cr_(2)O_(7)^(2-)and Cr O_(4)^(2-)with K_(sv) values of 3.5×10^(3)and 6.14×10^(3)M^(-1),respectively.It has detection limitations of 10 and 5μM on Cr_(2)O_(7)^(2-)and Cr_(2)O_(7)^(2-)ions,respectively.展开更多
基金supported by the National Natural Science Foundation of China(51972061)。
文摘The exploration of a dual-functional sensor is the key to effectively detect the Cr(Ⅵ)and Fe(Ⅲ)cations in water,which is important to human health and environmental sustainability.Because of the phase stability and excellent luminescence,the rare-earth coordination polymers have great potential as dual-functional sensors.Here,we develop a Y_(0.91)Eu_(0.09)(H_(2)O)_(2){C_(6)H_(3)(CO_(2))_(3)}(MIL-92(Y):9%Eu^(3+))-based dual-function luminescent sensor on Cr(Ⅵ)and Fe(Ⅲ),which exhibits excellent phase stability and dispersibility in water.The luminescence of MIL-92(Y):9%Eu^(3+)aqueous suspension quenches on Fe^(3+)with Stern-Volmer constant K_(sv) of 1.79×10^(3)M^(-1)and limit of detection of 17μM.The MIL-92(Y):9%Eu^(3+)aqueous suspension also has turn-off sensing ability towards Cr_(2)O_(7)^(2-)and Cr O_(4)^(2-)with K_(sv) values of 3.5×10^(3)and 6.14×10^(3)M^(-1),respectively.It has detection limitations of 10 and 5μM on Cr_(2)O_(7)^(2-)and Cr_(2)O_(7)^(2-)ions,respectively.
