A Novel Co-based MOF as an Efficient Multifunctional Fluorescent Chemosensor for the Determination of Fe3+ and Cr2O72- in Aqueous Phase

A novel Co-based metal-organic framework, namely [Co-3(BTA)(2)(5-tbuip)(2)](n) (LMOF-1) (BTA=1H-Benzotriazole, 5-tbuip=5-tert-Butylisophthalic Acid), was successfully synthesized by solvothermal method using rigid benzotriazole as the main ligand and chromophore. The choice of ligands avoids the creation of interpenetrating structures in the structure and is demonstrated by single crystal X-ray diffraction data. LMOF-1 crystallizes in the tetragonal system, P4/n space group. LMOF-1 is linked by BTA to form a one-dimensional(1D) chain of metal clusters, which is then linked by 5-tbuip to form a three-dimensional(3D) network structure. The detection ability of LMOF-1 for metal ions in water was evaluated. It is worth noting that LMOF-1 has high selectivity and sensitivity for Fe3+ and Cr2O72-, and it has a lower detection limit of 2.18x10(6)M, 1.86x 10(6)M, respectively. The results show that LMOF-1 is a promising chemical sensor for the detection of Fe3+ and Cr2O72- in aqueous solution.

Automated summary

A novel Co-based metal-organic framework, LMOF-1, was successfully synthesized by solvothermal method. LMOF-1 showed high selectivity and sensitivity for Fe3+ and Cr2O72- in aqueous solution. This study demonstrates the potential of LMOF-1 as a chemical sensor for the detection of Fe3+ and Cr2O72-.