Amino-functionalized copper-based metal-organic frameworks for high selectivity and sensitive detection of hypochlorite
In this work, we have developed amino-functionalized copper-based metal-organic frameworks (NH2-Cu-MOFs) for detection of hypochlorite (ClO-). NH2-Cu-MOFs were synthesized by one-pot hydrothermal method, which exhibits strong fluorescence at 455 nm under the excitation of 330 nm. In the presence of ClO-, the fluorescence of NH2-Cu-MOFs was quenched due to the electron transfer between NH2-Cu-MOFs and ClO-. The NH2-Cu-MOFs exhibited 87.6% fluorescence quenching efficiency with 12.5 μM ClO- and the limit of detection is 0.036 μM. NH2-Cu-MOFs exhibited the advantages of high sensitivity, high selectivity, and low response reaction time for ClO- detection. This work developed a novel fluorescence probe for detection of ClO- and the NH2-Cu-MOFs were successfully applied to analysis ClO- in real water samples.