A new three-dimensional luminescent MOF for the detection of Fe3+, 3+CrO42-,and Cr2O72-in 2O72 in aqueous solution

A new luminescent MOF were synthesized by solvothermal method based on 1,1,2,2-tetrakis(4-(pyridin-4-yl) phenyl)ethene (TPPE), with the molecular structure of [Zn2(TPPE)0.5(ndc)2]n(ndc 2 (TPPE) 0.5 (ndc) 2 ] n (ndc = 1,4-Naphthalenedicarboxylic acid) ( LMOF-1 ). The single crystal structure indicates that LMOF-1 stacks in a threedimensional structure. The fluorescence test results indicate that LMOF-1 emits blue light with quantum yield at 37.93 %, due to ligand-ligand charge transfer. PXRD and TG analysis confirmed that LMOF-1 has good stability, and PXRD analysis after different solvent exchanges confirmed that LMOF-1 has good stability in water. The results of ion titration experiments show that Fe3+, 3+ , CrO42, 4 2 , and Cr 2 O 7 2have significant quenching effects on LMOF-1, , and the detection limits are 3.83 x 10 6 M, 2.57 x 10 5 M, and 4.33 x 10 6 M, respectively. Indicating that LMOF-1 can serve as a multifunctional ion detector.