Facile fabrication of Eu-1,4-NDC-fcu-MOF particles for sensing of benzidine
The controllable synthesis of MOF materials is of great significance for its application. At present, the regulation of MOF morphology is mainly limited to those composed of transition metal elements, such as IRMOF, ZIF-8, HKUST-1, UiO-66, and MIL-MOFs etc, and few reports about the fabrication of micro/nano sized lanthanide MOFs could be found in literature. In this paper, micron sized Eu-1,4-NDC-fcu-MOF octahedral particles were obtained via a modified solvothermal method by using methylamine as a modulator. The luminous efficiency of Eu3+ was greatly improved due to the efficient energy transfer from the 1,4-NDC ligand to rare earth ion. The resultant Eu-1,4-NDC-fcu-MOFs particles could be used to detect benzidine in ethanol solution effectively, and as the concentration of benzidine increased, the fluorescence intensity of Eu-1,4-NDC-fcu-MOFs gradually decreased. Due to the good stability, high luminescent intensity and excellent sensitivity, this work further demonstrates that Ln-MOF are ideal fluorescent probes to identify specific molecules.
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