Abstract
How to achieve good dispersion of MOFs (metal–organic frameworks) is the key to its application in many fields. In our work, a novel MOF nanocomposite TBAPy-Yb was synthesized by solvothermal approach with TBAPy [1,3,6,8-tetrakis(p-benzoic acid)pyrene)] as the organic ligand and lanthanide metal ions as the metal ion source. Due to the coordination between phosphate and TBAPy-Yb, TBAPy-Yb had excellent dispersion in phosphate buffer and induced strong fluorescence emission in 435 nm. Gsp (gossypol) could regularly and instantly quench the induced fluorescence of TBAPy-Yb in the range of 10.0 to 70.0 μM and cause an obvious color change from blue to colorless. The detection limit was as low as 4.57 μM. The possible interferences in cottonseed oil did not influence the detection. The proposed method was effectively applied toanalyzeGsp oil with a recovery rate ranging from 94.20 % to 104.90 %. Furthermore, a portable and smart sensing platform was developed based on probe fixation and mobile phones.
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