TY - JOUR
T1 - EY@UiO-67-CDC-(CH3)2 as an ultra-sensitive ratiometric fluorescence sensor for visible and selective detecting of nitrite
AU - Zou, Xin
AU - Chen, Wen yi
AU - Li, Xu shan
AU - Sun, Qian
AU - Gao, En qing
N1 - Publisher Copyright:
© 2024
PY - 2024/5
Y1 - 2024/5
N2 - Nitrite is widely used in production and daily life, and detecting this substance has always been crucial for human health or environment monitoring. Here, a dual-emitting dye@MOF composite, EY@UiO-67-CDC-(CH3)2, has been constructed and demonstrated that this material could detect nitrite ions with highly selective and anti-interference properties. By incorporating an organic anionic dye (Eosin Y) within a cationized EY@UiO-67-CDC-(CH3)2 framework through the post-synthetic method, the composite presents an effective combination due to electrostatic attraction. It features a dual emission effect, which belongs to the blue emission of MOF at 428 nm and yellow emission of EY at 559 nm, respectively. After adding NO2−, the fluorescence emission peaks of EY and MOF showed opposite changes due to the inner filter effect of NO2− and MOF, as well as effective excitation of the dye's fluorescence and slight dye leakage. Therefore, Idye/IMOF is used as the detection signal value instead of absolute fluorescence intensity, effectively reducing the detection limit to 0.224 μM and improving its detection accuracy. In addition, during the detection process, the fluorescence sensor showed noticeable color changes, so a smartphone-based analytical device without additional instruments was developed for the quantitative, visual analysis of nitrite by identifying the RGB values of the fluorescence sample solution, with a detection limit of 6.74 μM. The application of the sensor visualizes nitrite detection and reduces the cost of detection, providing a feasible method for on-site detection of nitrite in water samples.
AB - Nitrite is widely used in production and daily life, and detecting this substance has always been crucial for human health or environment monitoring. Here, a dual-emitting dye@MOF composite, EY@UiO-67-CDC-(CH3)2, has been constructed and demonstrated that this material could detect nitrite ions with highly selective and anti-interference properties. By incorporating an organic anionic dye (Eosin Y) within a cationized EY@UiO-67-CDC-(CH3)2 framework through the post-synthetic method, the composite presents an effective combination due to electrostatic attraction. It features a dual emission effect, which belongs to the blue emission of MOF at 428 nm and yellow emission of EY at 559 nm, respectively. After adding NO2−, the fluorescence emission peaks of EY and MOF showed opposite changes due to the inner filter effect of NO2− and MOF, as well as effective excitation of the dye's fluorescence and slight dye leakage. Therefore, Idye/IMOF is used as the detection signal value instead of absolute fluorescence intensity, effectively reducing the detection limit to 0.224 μM and improving its detection accuracy. In addition, during the detection process, the fluorescence sensor showed noticeable color changes, so a smartphone-based analytical device without additional instruments was developed for the quantitative, visual analysis of nitrite by identifying the RGB values of the fluorescence sample solution, with a detection limit of 6.74 μM. The application of the sensor visualizes nitrite detection and reduces the cost of detection, providing a feasible method for on-site detection of nitrite in water samples.
KW - Eosin Y
KW - Luminescent metal-organic frameworks
KW - Nitrite
KW - Ratiometric fluorescence sensor
UR - https://www.scopus.com/pages/publications/85187545446
U2 - 10.1016/j.jssc.2024.124651
DO - 10.1016/j.jssc.2024.124651
M3 - 文章
AN - SCOPUS:85187545446
SN - 0022-4596
VL - 333
JO - Journal of Solid State Chemistry
JF - Journal of Solid State Chemistry
M1 - 124651
ER -
